Does Anyone Here Have A Set Of #38 Slow Jets

[Bert AKA,Valkaholic]

 I Have Larue's Carburetors Apart And I Am Looking For A Set Of #38 Slow Jets ,I Will Replace Them As Soon As I Or He Gets Another Set. Apparently He Ordered The Wrong Size Or They Sent Him The Wrong Size Because The Ones That He Gave Me To Put In, Fall Into The Holes, (Too Small). If Not It Will Be A Few More Days Before I Put It Back Together. If Anyone Has A Set Just Let Me Know Here Or Send Me A PM.
Thanks,Bert

[John Schmidt]

Bert, unless he screwed up on the ordering, I sent him the link from which he should have ordered.

The p/n for the #38 should be: SKU-N424-21, second one from the top on this link which I sent to him.

http://jetsrus.com/a_jet_kit_street/honda_1500_valkyrie.htm

[98valk]

why? exhaust or air box mods? not needed if not, stock 35s are fine, just open up the idle mixture screws more 2-4 turns as needed. will get better mpg than 38s. while cruising down the hwy u are only at 1/8 throttle and running off of the PJ. so larger than needed worst mpg.

[John Schmidt]

Hmm, beg to differ on the mileage. I installed my 38's years ago, didn't affect my mileage one iota. What it did affect was I've not experienced any tendency to clog from this lousy fuel now being foisted upon us. Prior to that, I had to either clean or replace the 35's three times. With the 38's I haven't changed my habits except I'm not spending time pulling carbs. One habit I was happy to break.

[larue]

Bert, unless he screwed up on the ordering, I sent him the link from which he should have ordered.

The p/n for the #38 should be: SKU-N424-21, second one from the top on this link which I sent to him.

http://jetsrus.com/a_jet_kit_street/honda_1500_valkyrie.htm

This what i exactly ordered john  SKU-N424-21 however i recieved n 424-74C  and it says #38 engraved on them- which is in packaging slip i geuss they screwed up, ordered new ones and were shipped today and they are SKU-N424-21.
hope they dont screw up again 

[Bert AKA,Valkaholic]

Hmm, beg to differ on the mileage. I installed my 38's years ago, didn't affect my mileage one iota. What it did affect was I've not experienced any tendency to clog from this lousy fuel now being foisted upon us. Prior to that, I had to either clean or replace the 35's three times. With the 38's I haven't changed my habits except I'm not spending time pulling carbs. One habit I was happy to break.

I Have To Agree With John On Not Wanting To Clean The #35 Jets Due To Clogging. I Have Three Valkyries And The One That I Installed The #38 Jets In Gets The Best Fuel Mileage And The Throttle Response Is Quicker And Smoother. Therefore When I Am In A Set Of Carbs Cleaning And Refreshing Them , I Install # 38 Slow Jets With The Hope That I Won't Have To Take Them Back Off For Cleaning In The Near Future Due To Trying To Make These Valkyries Chew Up This Corn Based Ethanol.

[John Schmidt]

Larue, I hope they let you return the wrong ones. They should also not charge you for shipping this time around.

[98valk]

Hmm, beg to differ on the mileage. I installed my 38's years ago, didn't affect my mileage one iota. What it did affect was I've not experienced any tendency to clog from this lousy fuel now being foisted upon us. Prior to that, I had to either clean or replace the 35's three times. With the 38's I haven't changed my habits except I'm not spending time pulling carbs. One habit I was happy to break.

http://factorypro.com/   the other 3-4 holes are bigger in 38s vs 35s, = worst mpg. its mostly only 1 to 2 mpg difference. most will not notice unless really, keeping great records, on same ride course for a full tank. since I mainly commute on my bike, I can tell u there is a difference esp with my air box and exhaust mods. colder temps I actually need to partially block airflow into the air box. a larger pj would cure the problem but then way too rich on the 3-4 holes during the warmer months.

"As far as the pilot... Look at it this way...

There are 4 outlet holes for the pilot mixture. ~3-4 at the butterfly and one "downstream" of that (for 75% of the idle mixture).

1 hole is controlled by the mixture screw and with the other 3 or 4, max flow is limited by the size of the pilot jet.

At idle, 1 hole (metered by the fuel screw) and 1 un metered hole are open.

At cruise, when the "butterfly" is just "cracked", all 3-4 unmetered holes + the 1 metered one are uncovered -

So.....

At cruise, you get those 3 unmetered holes + the metered hole... So, at least 75% of the fuel delivered at cruise is limited by the size of the pilot jet.

At idle, you get 100% of the trimmed 1  hole + a butterfly valve-trimmed amount of the other 3-4 metered holes.

Rule of thumb....
If you go 1 size larger or smaller on the size of the pilot jet, you will change the fuel screw ~1.5x richer or leaner to retain the original idle mixture -

Example:
You have a #40 pilot jet installed (with the proper main, needle height and fuel  level already done)  and to get best idle, you are 4.0 turns out (from lightly bottomed out).
Cruise seems lean....

So, I'd expect that I could richen the cruise with 1 size larger (42) pilot jet (size of pj is 75% of cruise mixture) and the "trim" the fuel screw "in" for best mixture for best idle (size of pilot is 25% of idle mixture).

To go back to ~ the same idle mixture, after going from 40 pj/4.0x to the 42........ try 2.5x

40 pj / 4.0x = our reference idle mixture
42 pj / 2.5x = ~ same idle mixture
38 pj /5.5x = ~ same idle mixture (this is a "stretch - after 4.5x, not much changes)

(Using another "rule of thumb", if you have the correct pilot jet, the fuel screw will end up at between 1.5x and 3.0x when set for best idle.)

Marc"     www.factorypro.com

[FloridaValkRyder]

Lord have mercy..that was a mouthful.  ???  I'm just fine with my stock setup which seems to work as Honda had intended, so far anyway. 

[98valk]

Lord have mercy..that was a mouthful.  ???  I'm just fine with my stock setup which seems to work as Honda had intended, so far anyway. 

now with the ethanol in the gas which makes the engine run lean, some bikes actually need the 38's if opening up the idle mixture screw doesn't work.
if your stock u might notice a major difference opening up the screw 1/2 to 1 turn, that's if u are using ethanol fuel.
also according to factory pro, the valkyrie should have the needles of the front 2 carbs slightly richer than the other four, using one additional washer.  it makes a difference.

[John Schmidt]

Good grief CA! My airbox is stock but with a K&N sans prefilter, some slightly modified pipes that helps breathing, a set of I/S carb springs and an I/S ECM. All that along with the #38's. The bike runs "very fine" as is, in fact some better than in its OEM configuration...both in performance and mileage. Most folks aren't really interested in the technical aspect as posted. If it runs good, gives relatively good mileage(depending on wrist action), and doesn't create problems with the current moonshine being passed off as gasoline....then life is good. As for my own mpg, I know for a fact based on my purchase records and miles "flown"....it didn't lower the mileage. I had made a trip just prior to the work I did on the carbs and kept a record of fuel usage, something I often will do when traveling. I did it purposely because of being forced to use the ethanol and was curious as to how it might affect performance...which it did; lower mileage. About a month following the installation of the 38's, I literally made the same trip; same bike, slightly heavier load, same general speed using the cruise control. Here's a special note: Better mileage.

Nothing else was done to the carbs or the bike in general. The carbs didn't need cleaning so I didn't, no change in the mains, a slight change in the pilot jet setting to accommodate the new slows. My "around town" change is nil, it may be slightly less but is balanced out with an even greater degree of unimportance. With my setup, I don't need to restrict any airflow intake or concern myself with temperature changes in general. I know the bike still runs the same....effortlessly and without problems. The only thing temps cause is if it's above 90 deg. I know I'll be hot while riding. If it's at or below 45 deg., I know I'll be cold while riding. Aside from that........

[FloridaValkRyder]

The only thing temps cause is if it's above 90 deg. I know I'll be hot while riding. If it's at or below 45 deg., I know I'll be cold while riding. Aside from that........

...Thanks for clearing that up John..So I don't need to bring my bike over in the morning then??  

PS..CA, I respect the heck out of the technical knowledge you have garnered and posess and mean no disrespect. It is all just so beyond my capabilities. Thankfully, I have a really old friend in Winter Park and another gentleman over in Seffner.... I can change my own oil though!! 

[Tundra]

why? exhaust or air box mods? not needed if not, stock 35s are fine, just open up the idle mixture screws more 2-4 turns as needed. will get better mpg than 38s. while cruising down the hwy u are only at 1/8 throttle and running off of the PJ. so larger than needed worst mpg.

This is also what I did years ago.
It took me quite a while to get this bike running right. Exhaust and air box mods, 6 degree trigger wheel, all mixture screws adjusted, minimum of 2.5 turns, several at 3 turns. needles shimmed, Interstate springs. No more strong flat spot, Runs perfect, plugs read perfect color. The plugs are so nice and tan, I just clean them and have 45k on this set. I will never touch her or alter her again.
Oh yeah...I easily get 40mpg and got 40mpg on our last organized ride to Champions Honda/Leesburg.
  I can understand re-jetting with the corn fuel. Especially if your bike sits for periods between rides. I gladly pay the difference for non-ethanol. I also use Lucas fuel treatment when forced to use the corn fuel on the road and have never experienced the horrible carb pulling issues.
Me... I want to ride it, not work on it.

[FloridaValkRyder]

I have started running non-ethanol fuel all the time now. Paid 4.35 a gallon last week. I can't tell a difference but I know it's so much better for the old girl. I think I might go out for a short ride this morning!!

[IamGCW]

Doug

Maybe I missed it, are you running 38's?

Gil

[Tundra]

Nope, stock jets I did as CA had mentioned.
I just opened up my idle mixture screws/shimmed the needles. It took me a while to find the sweet spot and each carb is different.