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"Enhanced" 1500 - 1700cc Valkyrie Interstate on EBay

Started by PAVALKER, Thu 05, Nov 2009, 22:21:29

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PAVALKER

Does anyone know the individual that owns this and is he/she here????   

http://cgi.ebay.com/ebaymotors/2001-Valkyrie-GL-1500-Interstate-enhanced-to-1700cc_W0QQitemZ250526015003QQcmdZViewItemQQptZUS_motorcycles?hash=item3a54839e1b

I know there are visual "enhancements" as I can see those.  But I would be curious as to exact mechanical enhancements that took this 1500cc to 1700cc and how that was documented?   
John                           

Gryphon Rider

Can't comment on enhancements, it would seem the owner has quite a short inseam!


Dogg

I sent email. I am also curious as to how he did it with only having 25k in the WHOLE bike....

Big IV

It should mean that he has overboard the cylinders to make the displacement bigger.
SHOULD mean. Never can tell.
"Ride Free Citizen!"
VRCCDS0176

Jeff K

I doubt that this bike is bored and or stroked to 1700cc I think someone is guessing.
There is no way this bike has only 25,000 miles on it, 25,000 on the rebuild maybe.
Why wouldn't you wash the thing before taking pictures??

MP

I see " too much chrome to list"  when dealers list valks.  And they are only OEM chrome pieces.  I wonder what they would say about a nice one!

MP

"Ridin' with Cycho"

Pete

I suspect that one would have to bore and stroke to reach 1700 cc. Not even sure if that is possible. A max overbore on a GL1000 produced 1086 cc with very very thin cylinder walls. Perhaps it has been done would sure be interesting to know how. Thanks Pete.

bsnicely

Check with Smokin Joe, his Yellow and Cream ( half breed ) has been " displacement enhanced " .   :cooldude:
I think I should have no other mortal wants, if I could always have plenty of music. It seems to infuse strength into my limbs and ideas into my brain. Life seems to go on without effort, when I am filled with music.

Willow

You guys are way harsh on the "too much chrome".  Here's what I can list from the pix.

Chrome front fender rail
Chrome front brake caliper covers
Chrome front brake disk covers
Chrome radiator grill
Chrome fork covers
Chrome spark plug valances
Chrome engine hanger covers
Chrome transmission covers
Chrome swing arm pivot covers
Chrome bag rails
Chrome trunk rails
Chrome trunk luggage rack
Chrome replacement hand grips
Chrome license plate holder
Chrome switch case extension on the front brake master cylinder


Non-chrome additions:

Four piece custom seats
Pod lights
Trailer hitch
Cobra pipes
Air wings with lowers
Fork deflectors
Highway pegs

Even if the engine is ruined it could be a good deal for someone.  I have a perfectly good engine that I'd value at somewhere around six hundred dollars.

Nice bike.

Spirited-6

Quote from: Tundra on Fri 06, Nov 2009, 06:30:59
Run away!!! 
I love it when you see "to much chrome to list" and it's a bare bones stock Valk, or maybe some engine hangers and tranny covers added :uglystupid2:

Guy, you need to LOOK again. Lots of chrome on that IS. ;)
Spirited-6

motomama

#10
Quote from: Big IV on Fri 06, Nov 2009, 05:23:23
It should mean that he has overboard the cylinders to make the displacement bigger.
SHOULD mean. Never can tell.
He threw the cylinders off his boat??  :D  :D  :D
Motomama

stormrider

#11
Hey Carl, glad you beat me to it cause for those that are stock Valkyrie illiterate I was gonna make a list. Geezz. And like you say, would be a good deal for someone. Don't care for the color but with all the goodies if I would be interested if I was a looking. Oh and add a CB radio to that list. And it looks as though the rims are chromed.
Freedom will ultimately cost more than we care to pay but will be worth every drop of blood to those who follow and cherrish it.

6jugzz

That's  33.333333333333 cc per cyclinder, only get it by bore or stroke or both??? or 2.034127769 cubic inches per,thats alot???

Valkyrie...ride the best, love the rest!


Chrisj CMA

Quote from: 6jugzz on Fri 06, Nov 2009, 09:45:20
That's  33.333333333333 cc per cyclinder, only get it by bore or stroke or both??? or 2.034127769 cubic inches per,thats alot???


LOL....I just got done punching keys on my calculator to get that same answer.  I think the only "enhancement" was to the ad.  Im not saying that is a bad bike, but more than 12% displacement increase just isint believable to me either.

6jugzz

Someone should ask this person "just how" they did that. I don't buy from ebay and do not have the log-in stuff. :roll:
Valkyrie...ride the best, love the rest!


Dogg

um, mine is 1720cc. but I had it resleeved. not boaring. not possible. thats why i went with resleeving. J&E pistons made me pistons. had to send cylinders to them to mic exact. I stroked mine, custom made connecting rods. carrilo. H-beam. I got more in my motor than he does in that whole IS. I aint braggin, just saying that it IS possible. just gotta see how deep you wallet is....

Dogg

I just spoke with him. had a place in chicago called the zone?? do the head work and new cams. lots of extras. nice man, just hurtin for cash. has an 06 wing too. says the valk keeps up with the 1800 wing with no problems.....

6jugzz

ain't no substitution for cubic inches, as they say in race world. At least I now know it can be done---well I learned something, I believe I'll take the rest of the day off!! :cooldude:



ya think we could cram one of these under the tank- 8)
Valkyrie...ride the best, love the rest!


Jeff K

Quote from: Dogg on Fri 06, Nov 2009, 10:24:58
um, mine is 1720cc. but I had it resleeved. not boaring. not possible. thats why i went with resleeving. J&E pistons made me pistons. had to send cylinders to them to mic exact. I stroked mine, custom made connecting rods. carrilo. H-beam. I got more in my motor than he does in that whole IS. I aint braggin, just saying that it IS possible. just gotta see how deep you wallet is....

I have a set of Carrillo rods. They are .100 shorter than stock, we did than to lower the pin on the piston and thicken the top of the piston. I'll probably never use them but there they are. I have a set in my bike now with dished 8:1 pistons.

The point I was trying to make is that he couldn't get the 1700cc as easy as boring the stock block. He would have to sleeve it and or stroke it. I doubt he did all that.

PharmBoy

I saw a 7 cylinder radial in a bike frame at Oshkosh a couple of years ago.  It looked rather strange and didn't make much noise, but it was rated at 100hp.  Don't remember the displacement.  It was a new little radial engine aimed at the experimental aircraft building group.  I have a picture of it somewhere....JTL
A politician is a fellow who will lay down your life for his country. ~Texas Guinan
4th Infantry Tet Vet
99 Interstate
97 Bumble Bee
97 Red & White

PAVALKER

Quote from: Gryphon Rider on Thu 05, Nov 2009, 23:45:15
Can't comment on enhancements, it would seem the owner has quite a short inseam!




Wow.... yea, very short inseam.  Geeze......   didn't notice that first time.

And it does seem to have quite a bit of chrome goodies.....   
John                           

alph

Quote from: Willow on Fri 06, Nov 2009, 08:41:14
You guys are way harsh on the "too much chrome".  Here's what I can list from the pix.

Chrome front fender rail
Chrome front brake caliper covers
Chrome front brake disk covers
Chrome radiator grill
Chrome fork covers
Chrome spark plug valances
Chrome engine hanger covers
Chrome transmission covers
Chrome swing arm pivot covers
Chrome bag rails
Chrome trunk rails
Chrome trunk luggage rack
Chrome replacement hand grips
Chrome license plate holder
Chrome switch case extension on the front brake master cylinder


Non-chrome additions:

Four piece custom seats
Pod lights
Trailer hitch
Cobra pipes
Air wings with lowers
Fork deflectors
Highway pegs

Even if the engine is ruined it could be a good deal for someone.  I have a perfectly good engine that I'd value at somewhere around six hundred dollars.

Nice bike.



not to mention that he's got a CB on there also!  this bike is loaded, screwed engine or not, i'd buy it!! 
Promote world peace, ban all religion.

Ride Safe, Ride Often!!  :cooldude:

f6gal

Quote from: motomama on Fri 06, Nov 2009, 08:51:50
Quote from: Big IV on Fri 06, Nov 2009, 05:23:23
It should mean that he has overboard the cylinders to make the displacement bigger.
SHOULD mean. Never can tell.
He threw the cylinders off his boat??  :D  :D  :D

Help me out here, Lori... how does throwing one's cylinders overboard increase displacement?


You can't do much about the length of your life, so focus on the width.

f6gal

Quote from: alph on Fri 06, Nov 2009, 16:08:18
Quote from: Willow on Fri 06, Nov 2009, 08:41:14
You guys are way harsh on the "too much chrome".  Here's what I can list from the pix.

Chrome front fender rail
Chrome front brake caliper covers
Chrome front brake disk covers
Chrome radiator grill
Chrome fork covers
Chrome spark plug valances
Chrome engine hanger covers
Chrome transmission covers
Chrome swing arm pivot covers
Chrome bag rails
Chrome trunk rails
Chrome trunk luggage rack
Chrome replacement hand grips
Chrome license plate holder
Chrome switch case extension on the front brake master cylinder

Non-chrome additions:

Four piece custom seats
Pod lights
Trailer hitch
Cobra pipes
Air wings with lowers
Fork deflectors
Highway pegs

Even if the engine is ruined it could be a good deal for someone.  I have a perfectly good engine that I'd value at somewhere around six hundred dollars.

Nice bike.

not to mention that he's got a CB on there also!  this bike is loaded, screwed engine or not, i'd buy it!!

And a giant cup holder!!



You can't do much about the length of your life, so focus on the width.

Black Pearl's Captain

Quote from: f6gal on Fri 06, Nov 2009, 16:26:05
Quote from: motomama on Fri 06, Nov 2009, 08:51:50
Quote from: Big IV on Fri 06, Nov 2009, 05:23:23
It should mean that he has overboard the cylinders to make the displacement bigger.
SHOULD mean. Never can tell.
He threw the cylinders off his boat??  :D  :D  :D

Help me out here, Lori... how does throwing one's cylinders overboard increase displacement?

You girlz should probably stay out of this thread. There are a lot of "techincal" terms your female minds probably just can't grasp.  ;)

OK?

Raymond

f6gal

Quote from: Black Pearl's Captain on Fri 06, Nov 2009, 16:34:33

You girlz should probably stay out of this thread. There are a lot of "techincal" terms your female minds probably just can't grasp.  ;)

OK?

Raymond

Girl???  You called me a girl???  Consider the gauntlet thrown... it's on now!


You can't do much about the length of your life, so focus on the width.

Stanley Steamer

Quote from: f6gal on Fri 06, Nov 2009, 17:14:24
Quote from: Black Pearl's Captain on Fri 06, Nov 2009, 16:34:33

You girlz should probably stay out of this thread. There are a lot of "techincal" terms your female minds probably just can't grasp.  ;)

OK?

Raymond

Girl???  You called me a girl???  Consider the gauntlet thrown... it's on now! 

I wonder what he wants on his "Tombstone"?....as in pizza. :D
Stanley "Steamer"

"Ride Hard or Stay Home"


motomama

Quote from: Black Pearl's Captain on Fri 06, Nov 2009, 16:34:33
Quote from: f6gal on Fri 06, Nov 2009, 16:26:05
Quote from: motomama on Fri 06, Nov 2009, 08:51:50
Quote from: Big IV on Fri 06, Nov 2009, 05:23:23
It should mean that he has overboard the cylinders to make the displacement bigger.
SHOULD mean. Never can tell.
He threw the cylinders off his boat??  :D  :D  :D

Help me out here, Lori... how does throwing one's cylinders overboard increase displacement?

You girlz should probably stay out of this thread. There are a lot of "techincal" terms your female minds probably just can't grasp.  ;)

OK?

Raymond
Excuse me, sir!  Since when is overboard a technical term, unless you are referring to the exact dimensions of the bow or the stern, or whether it went overboard on the port or "starbored" side?
Motomama

Black Pearl's Captain

Quote from: f6gal on Fri 06, Nov 2009, 17:14:24
Quote from: Black Pearl's Captain on Fri 06, Nov 2009, 16:34:33

You girlz should probably stay out of this thread. There are a lot of "techincal" terms your female minds probably just can't grasp.  ;)

OK?

Raymond

Girl???  You called me a girl???  Consider the gauntlet thrown... it's on now!

Pretty big talk there girlie.

Raymond

f6gal

Quote from: motomama on Fri 06, Nov 2009, 17:35:15
Quote from: Black Pearl's Captain on Fri 06, Nov 2009, 16:34:33
Quote from: f6gal on Fri 06, Nov 2009, 16:26:05
Quote from: motomama on Fri 06, Nov 2009, 08:51:50
Quote from: Big IV on Fri 06, Nov 2009, 05:23:23
It should mean that he has overboard the cylinders to make the displacement bigger.
SHOULD mean. Never can tell.
He threw the cylinders off his boat??  :D  :D  :D

Help me out here, Lori... how does throwing one's cylinders overboard increase displacement?

You girlz should probably stay out of this thread. There are a lot of "techincal" terms your female minds probably just can't grasp.  ;)

OK?

Raymond
Excuse me, sir!  Since when is overboard a technical term, unless you are referring to the exact dimensions of the bow or the stern, or whether it went overboard on the port or "starbored" side?

Well Lori, perhaps they needed the technical part to throw the motor overboard.  Being that the motor is rather heavy, the easiest way to get it off the boat would be to gun the boat, so that the forward thrust would throw the motor from the stern.  Now, the boat may not have the power to accomplish this, so (this is the technical part) he may need to increase the boat's power.  One way to add to the boat's power would be to increase the engine displacement.  He can accomplish this by boring out the motor or by stroking the crankshaft.  
The formula for measuring displacement is (pi/4 × bore2) × stroke × cylinders. (pi/4 × bore2) is the area of the cylinder. The stroke (length of the cylinder) is the distance the piston travels from TDC to BDC. Ergo (I love saying ergo), increasing displacement is simply a matter of increasing the area, length, or number of cylinders.
The easiest of these is to increase the area is by boring out the cylinders.  However, boring is restricted by cylinder wall thickness, as well as spacing between cylinders.
Increasing the cylinder length by stroking the crankshaft is more complicated, as it requires offset machining of the big-end journals on the crankshaft and perhaps the conrods. Stroking is restricted by the clearance between the rotational diameter of the crankshaft and the engine block.

Hope that wasn't tooooo technical for your female mind.  :crazy2:

Oh, and I'm sure we can guess what Raymond grasps best!   :o


You can't do much about the length of your life, so focus on the width.

RP#62

Quote from: 6jugzz on Fri 06, Nov 2009, 13:32:52
ain't no substitution for cubic inches, as they say in race world. At least I now know it can be done---well I learned something, I believe I'll take the rest of the day off!! :cooldude:



ya think we could cram one of these under the tank- 8)

I used to work on that particular motor.  Took me 5 years to get all the oil out of my hands.
-RP
 

Joe Hummer

Quote from: f6gal on Fri 06, Nov 2009, 19:12:40

Well Lori, perhaps they needed the technical part to throw the motor overboard.  Being that the motor is rather heavy, the easiest way to get it off the boat would be to gun the boat, so that the forward thrust would throw the motor from the stern.  Now, the boat may not have the power to accomplish this, so (this is the technical part) he may need to increase the boat's power.  One way to add the boat's power would be to increase the engine displacement.  He can accomplish this by boring out the motor or by stroking the crankshaft.  
The formula for measuring displacement is (pi/4 × bore2) × stroke × cylinders. (pi/4 × bore2) is the area of the cylinder. The stroke (length of the cylinder) is the distance the piston travels from TDC to BDC. Ergo (I love saying ergo), increasing displacement is simply a matter of increasing the area, length, or number of cylinders.
The easiest of these is to increase the area is by boring out the cylinders.  However, boring is restricted by cylinder wall thickness, as well as spacing between cylinders.
Increasing the cylinder length by stroking the crankshaft is more complicated, as it requires offset machining of the big-end journals on the crankshaft and perhaps the conrods. Stroking is restricted by the clearance between the rotational diameter of the crankshaft and the engine block.

Hope that wasn't tooooo technical for your female mind.  :crazy2:

Oh, and I'm sure we can guess what Raymond grasps best!   :o

:cooldude: :cooldude: :cooldude: :cooldude: :cooldude: :cooldude: :cooldude:

Way to go Connie!!!!
1999 Valkyrie Interstate
You pay for the whole bike, why not use it Jerry Motorman Palladino

gregc

 How does changing the connecting rods, change the stroke?  Stroke is based on the offset of the crankkshaft. I understand shortening the rods to lower the compression, since the piston won't come back up to the top of the deck.

Black Pearl's Captain

Quote from: f6gal on Fri 06, Nov 2009, 19:12:40
Quote from: motomama on Fri 06, Nov 2009, 17:35:15
Quote from: Black Pearl's Captain on Fri 06, Nov 2009, 16:34:33
Quote from: f6gal on Fri 06, Nov 2009, 16:26:05
Quote from: motomama on Fri 06, Nov 2009, 08:51:50
Quote from: Big IV on Fri 06, Nov 2009, 05:23:23
It should mean that he has overboard the cylinders to make the displacement bigger.
SHOULD mean. Never can tell.
He threw the cylinders off his boat??  :D  :D  :D

Help me out here, Lori... how does throwing one's cylinders overboard increase displacement?

You girlz should probably stay out of this thread. There are a lot of "techincal" terms your female minds probably just can't grasp.  ;)

OK?

Raymond
Excuse me, sir!  Since when is overboard a technical term, unless you are referring to the exact dimensions of the bow or the stern, or whether it went overboard on the port or "starbored" side?

Well Lori, perhaps they needed the technical part to throw the motor overboard.  Being that the motor is rather heavy, the easiest way to get it off the boat would be to gun the boat, so that the forward thrust would throw the motor from the stern.  Now, the boat may not have the power to accomplish this, so (this is the technical part) he may need to increase the boat's power.  One way to add to the boat's power would be to increase the engine displacement.  He can accomplish this by boring out the motor or by stroking the crankshaft.  
The formula for measuring displacement is (pi/4 × bore2) × stroke × cylinders. (pi/4 × bore2) is the area of the cylinder. The stroke (length of the cylinder) is the distance the piston travels from TDC to BDC. Ergo (I love saying ergo), increasing displacement is simply a matter of increasing the area, length, or number of cylinders.
The easiest of these is to increase the area is by boring out the cylinders.  However, boring is restricted by cylinder wall thickness, as well as spacing between cylinders.
Increasing the cylinder length by stroking the crankshaft is more complicated, as it requires offset machining of the big-end journals on the crankshaft and perhaps the conrods. Stroking is restricted by the clearance between the rotational diameter of the crankshaft and the engine block.

Hope that wasn't tooooo technical for your female mind.  :crazy2:

Oh, and I'm sure we can guess what Raymond grasps best!   :o

Look at ergo, I love it when she talks about stroking crankshafts and rotational diameters.

Raymond

motomama

Quote from: f6gal on Fri 06, Nov 2009, 19:12:40


Well Lori, perhaps they needed the technical part to throw the motor overboard.  Being that the motor is rather heavy, the easiest way to get it off the boat would be to gun the boat, so that the forward thrust would throw the motor from the stern.  Now, the boat may not have the power to accomplish this, so (this is the technical part) he may need to increase the boat's power.  One way to add to the boat's power would be to increase the engine displacement.  He can accomplish this by boring out the motor or by stroking the crankshaft.  
The formula for measuring displacement is (pi/4 × bore2) × stroke × cylinders. (pi/4 × bore2) is the area of the cylinder. The stroke (length of the cylinder) is the distance the piston travels from TDC to BDC. Ergo (I love saying ergo), increasing displacement is simply a matter of increasing the area, length, or number of cylinders.
The easiest of these is to increase the area is by boring out the cylinders.  However, boring is restricted by cylinder wall thickness, as well as spacing between cylinders.
Increasing the cylinder length by stroking the crankshaft is more complicated, as it requires offset machining of the big-end journals on the crankshaft and perhaps the conrods. Stroking is restricted by the clearance between the rotational diameter of the crankshaft and the engine block.

Hope that wasn't tooooo technical for your female mind.  :crazy2:

Oh, and I'm sure we can guess what Raymond grasps best!   :o
Uh...yeah...I understood every word you said!  :cooldude:

But, I still want to know...
Why did he throw the cylinders off the boat??  :D
Motomama

alph

Quote from: RP#62 on Fri 06, Nov 2009, 19:22:54
Quote from: 6jugzz on Fri 06, Nov 2009, 13:32:52
ain't no substitution for cubic inches, as they say in race world. At least I now know it can be done---well I learned something, I believe I'll take the rest of the day off!! :cooldude:



ya think we could cram one of these under the tank- 8)

I used to work on that particular motor.  Took me 5 years to get all the oil out of my hands.
-RP



now that's a bueautiful engine!
Promote world peace, ban all religion.

Ride Safe, Ride Often!!  :cooldude:

PAVALKER

the weather gets cold, the natives get restless and ...... I think it could be an active off riding season for the VRCC Message Boards

;D ;D
John                           

SlowRoad

Quote from: motomama on Fri 06, Nov 2009, 20:57:52
Quote from: f6gal on Fri 06, Nov 2009, 19:12:40



Well Lori, perhaps they needed the technical part to throw the motor overboard.  Being that the motor is rather heavy, the easiest way to get it off the boat would be to gun the boat, so that the forward thrust would throw the motor from the stern.  Now, the boat may not have the power to accomplish this, so (this is the technical part) he may need to increase the boat's power.  One way to add to the boat's power would be to increase the engine displacement.  He can accomplish this by boring out the motor or by stroking the crankshaft. 
The formula for measuring displacement is (pi/4 × bore2) × stroke × cylinders. (pi/4 × bore2) is the area of the cylinder. The stroke (length of the cylinder) is the distance the piston travels from TDC to BDC. Ergo (I love saying ergo), increasing displacement is simply a matter of increasing the area, length, or number of cylinders.
The easiest of these is to increase the area is by boring out the cylinders.  However, boring is restricted by cylinder wall thickness, as well as spacing between cylinders.
Increasing the cylinder length by stroking the crankshaft is more complicated, as it requires offset machining of the big-end journals on the crankshaft and perhaps the conrods. Stroking is restricted by the clearance between the rotational diameter of the crankshaft and the engine block.

Hope that wasn't tooooo technical for your female mind.  :crazy2:

Oh, and I'm sure we can guess what Raymond grasps best!   :o
Uh...yeah...I understood every word you said!  :cooldude:

But, I still want to know...
Why did he throw the cylinders off the boat??  :D


Actually, I believe that throwing the cylinders off the boat would decrease the weight of the boat thus "decreasing" the displacement of water by the boat.  ;D

f6gal

Quote from: PAVALKER on Fri 06, Nov 2009, 21:25:49
the weather gets cold, the natives get restless and ...... I think it could be an active off riding season for the VRCC Message Boards

;D ;D

Ummm, I don't understand the phrase "off riding season."  I didn't know there was such a thing.


You can't do much about the length of your life, so focus on the width.

Stude

Quote from: f6gal on Fri 06, Nov 2009, 19:12:40
Quote from: motomama on Fri 06, Nov 2009, 17:35:15
Quote from: Black Pearl's Captain on Fri 06, Nov 2009, 16:34:33
Quote from: f6gal on Fri 06, Nov 2009, 16:26:05
Quote from: motomama on Fri 06, Nov 2009, 08:51:50
Quote from: Big IV on Fri 06, Nov 2009, 05:23:23
It should mean that he has overboard the cylinders to make the displacement bigger.
SHOULD mean. Never can tell.
He threw the cylinders off his boat??  :D  :D  :D

Help me out here, Lori... how does throwing one's cylinders overboard increase displacement?

You girlz should probably stay out of this thread. There are a lot of "techincal" terms your female minds probably just can't grasp.  ;)

OK?

Raymond
Excuse me, sir!  Since when is overboard a technical term, unless you are referring to the exact dimensions of the bow or the stern, or whether it went overboard on the port or "starbored" side?

Well Lori, perhaps they needed the technical part to throw the motor overboard.  Being that the motor is rather heavy, the easiest way to get it off the boat would be to gun the boat, so that the forward thrust would throw the motor from the stern.  Now, the boat may not have the power to accomplish this, so (this is the technical part) he may need to increase the boat's power.  One way to add to the boat's power would be to increase the engine displacement.  He can accomplish this by boring out the motor or by stroking the crankshaft.  
The formula for measuring displacement is (pi/4 × bore2) × stroke × cylinders. (pi/4 × bore2) is the area of the cylinder. The stroke (length of the cylinder) is the distance the piston travels from TDC to BDC. Ergo (I love saying ergo), increasing displacement is simply a matter of increasing the area, length, or number of cylinders.
The easiest of these is to increase the area is by boring out the cylinders.  However, boring is restricted by cylinder wall thickness, as well as spacing between cylinders.
Increasing the cylinder length by stroking the crankshaft is more complicated, as it requires offset machining of the big-end journals on the crankshaft and perhaps the conrods. Stroking is restricted by the clearance between the rotational diameter of the crankshaft and the engine block.

Hope that wasn't tooooo technical for your female mind.  :crazy2:

Oh, and I'm sure we can guess what Raymond grasps best!   :o