csj
Member
Posts: 992
I used to be a wolfboy, but I'm alright NOOOOOWWWW
Peterborough Ontario Canada
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« on: October 18, 2012, 05:58:17 AM » |
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Have found that my bike only gets up to 115mph. I read up on the carburetor operation, got a very good idea of how it functions. Then went and asked two local, well respected bike mechanics, whats going on with my carbs? Both guys answered that the carb/diaghram is likely pitted or torn. This prevents enough vacuum from building up, the slider does not travel any further in its path, which acts like restricted throttle. Both mechanics have pulled apart a lot 'o carbs, finding that these parts have been ruined by ethanol in the fuel. I looked up the parts on internet, and inquired for price at a shop here.... Holy @%#&, it's like over $100 EACH.  Has anyone else had to replace these parts, is there a cheaper fix, or is there some other way of making a fix? |
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A guy called me a Ba$tard, I said in my case it's an accident
of birth, in your case you're a self made man.
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hubcapsc
Member
Posts: 16788
upstate
South Carolina
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« Reply #1 on: October 18, 2012, 06:52:45 AM » |
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 15 TOP 16107-KAZ-000 $29.32 I think this is the diaphragm, if it is the part I remember, it is floppy and rubber-like... I wouldn't be surprised if it gets chewed up by ethanol... 18 PISTON, VACUUM 16111-MZ0-A00 $72.04 This is a hard plastic part I think... maybe they're ate up, but I'd sure check them before doing anything... it is easy to get to these parts without taking much apart, I was there when I changed my chrome carb tops (17) for Cobras... -Mike |
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sugerbear
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« Reply #2 on: October 18, 2012, 07:01:22 AM » |
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best price i've found also. so far... nope, best price. found it in Europe for $199 every other place was $72--$75 |
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« Last Edit: October 18, 2012, 07:20:45 AM by sugerbear »
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donaldcc
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« Reply #3 on: October 18, 2012, 09:07:30 AM » |
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Try checking out this guy's carb rebuild and cleaning on YouTube (has been posted in past). Here is link to Part 1. I think he has 9 parts and does a great job explaining and illustrating with video. You will likely learn other things about the carbs that could be a factor.
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Don
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6tigo
Member
Posts: 39
Member #655
Melbourne Fl
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« Reply #4 on: October 18, 2012, 09:49:19 AM » |
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When the diaphragm is drawn up by vacuum slide #18 and needles #3 raise (are pulled up), thus opening the throttle body as will as metering fuel through main jets #29. Metered fuel is drawn up through #22 into the throttle body mixing with air and on to the engine.
At no time does raw fuel come in contact (or get any ware near) the diaphragms.
By following instructions on how to shim or change needles you can easily check diaphragm condition. They should be relatively soft and supple and free of any cracks / checking or pin holes.
I believe you will find they are just fine.
Just my 2 cents worth
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Four boxes keep us free:
The Soap Box, The Ballot Box, The Jury Box, and The Cartridge Box.
"Any man who thinks he can be happy and prosperous by letting the American Government take care of him; better take a closer look at the American Indian."
Henry Ford
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98valk
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« Reply #5 on: October 18, 2012, 09:52:59 AM » |
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if the diaghrams have damage u will know it during idle and part throttle cruise/accel.
these bikes really don't go much faster than what u stated when stock.
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1998 Std/Tourer, 2007 DR200SE, 1981 CB900C 10speed
1973 Duster 340 4-speed rare A/C, 2001 F250 4x4 7.3L, 6sp
"Our Constitution was made only for a Moral and Religious people. It is wholly inadequate to the goverment of any other."
John Adams 10/11/1798
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9Ball
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« Reply #6 on: October 18, 2012, 10:06:24 AM » |
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15 TOP 16107-KAZ-000 $29.32 I think this is the diaphragm, if it is the part I remember, it is floppy and rubber-like... I wouldn't be surprised if it gets chewed up by ethanol... 18 PISTON, VACUUM 16111-MZ0-A00 $72.04 This is a hard plastic part I think... maybe they're ate up, but I'd sure check them before doing anything... it is easy to get to these parts without taking much apart, I was there when I changed my chrome carb tops (17) for Cobras... -Mike #18 is the diaphragm.....#15 is the hard plastic cap. |
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VRCC #6897, Joined May, 2000
1999 Standard
2007 Rocket 3
2005 VTX 1300S
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Hoser
Member
Posts: 5844
child of the sixties VRCC 17899
Auburn, Kansas
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« Reply #7 on: October 18, 2012, 10:18:14 AM » |
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if the diaghrams have damage u will know it during idle and part throttle cruise/accel.
these bikes really don't go much faster than what u stated when stock.
With the speedo error on most bikes, you are could be doing 120 or better if it reads 115. Tire diameter is also a factor, both front and rear. Hoser  |
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I don't want a pickle, just wanna ride my motor sickle  [img width=300 height=233]http://i617.photobucket.com/albums/ |
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Willow
Administrator
Member
Posts: 16665
Excessive comfort breeds weakness. PttP
Olathe, KS
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« Reply #8 on: October 18, 2012, 10:56:25 AM » |
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if the diaghrams have damage u will know it during idle and part throttle cruise/accel.
these bikes really don't go much faster than what u stated when stock.
With the speedo error on most bikes, you are could be doing 120 or better if it reads 115. Tire diameter is also a factor, both front and rear. Hoser Speedometer error on all the Valks I've ridden result in the speedometer reading high. I think that's by design. Only the front tire diameter impacts the accuracy of the speedometer. One could argue that the rear tire diameter could slightly change the gear ratio, but I doubt it would be enough to significantly impact top speed. JMHO |
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Farther
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« Reply #9 on: October 18, 2012, 11:41:37 AM » |
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Both mechanics have pulled apart a lot 'o carbs, finding that these parts have been ruined by
ethanol in the fuel. Is this their opinion or determined under laboratory conditions. |
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Thanks,
~Farther
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Hoser
Member
Posts: 5844
child of the sixties VRCC 17899
Auburn, Kansas
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« Reply #10 on: October 18, 2012, 03:30:05 PM » |
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I must say, I have never had any fuel caused carb troubles, in over 100k. I use gas according to price on the pump, lowest price in it gos, exception is the E85 made for flex fuel vehicles. I use regular unleaded mostly, it still is available in copius amounts here in Kansas, and is usually priced the lowest. No such thing as E15, at least not yet. I probly will not use it as per the information going around on it. JMHO. Hoser |
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I don't want a pickle, just wanna ride my motor sickle [img width=300 height=233]http://i617.photobucket.com/albums/ |
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csj
Member
Posts: 992
I used to be a wolfboy, but I'm alright NOOOOOWWWW
Peterborough Ontario Canada
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« Reply #11 on: October 18, 2012, 06:14:31 PM » |
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Both mechanics have pulled apart a lot 'o carbs, finding that these parts have been ruined by
ethanol in the fuel.
Is this their opinion or determined under laboratory conditions? [/i] A mechanics shop is hardly a laboratory, but these guys really know their stuff. |
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A guy called me a Ba$tard, I said in my case it's an accident
of birth, in your case you're a self made man.
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98valk
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« Reply #12 on: October 19, 2012, 03:18:30 AM » |
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Both mechanics have pulled apart a lot 'o carbs, finding that these parts have been ruined by
ethanol in the fuel.
Is this their opinion or determined under laboratory conditions? [/i] A mechanics shop is hardly a laboratory, but these guys really know their stuff. unless u put E85 in the bike there is no problem. The bike is designed by the Honda Engineers, not shop mechanics, to be safely run on E10. see owners manual. |
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1998 Std/Tourer, 2007 DR200SE, 1981 CB900C 10speed
1973 Duster 340 4-speed rare A/C, 2001 F250 4x4 7.3L, 6sp
"Our Constitution was made only for a Moral and Religious people. It is wholly inadequate to the goverment of any other."
John Adams 10/11/1798
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csj
Member
Posts: 992
I used to be a wolfboy, but I'm alright NOOOOOWWWW
Peterborough Ontario Canada
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« Reply #13 on: October 19, 2012, 05:27:03 AM » |
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What I'm getting from you all is that the diaphragm is likely ok. How about this idea then;
Another rider I know 72yrs old has run carbureted Wings for years. He suggested to me that
he has seen gunk built up in the path of the slider, preventing it from travelling up its path.
All he had to do, back then, was pull the slider out, clean the path, and all performance was
restored.
Has anyone seen this happen on the Valk?
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A guy called me a Ba$tard, I said in my case it's an accident
of birth, in your case you're a self made man.
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sugerbear
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« Reply #14 on: October 19, 2012, 06:07:02 AM » |
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good question.
we rebuilt my buddies carbs (45,000 miles) and the plastic part was very clean.
i think the rubber seals that well enough. but that's just me.
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Ricky-D
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« Reply #15 on: October 19, 2012, 08:12:36 AM » |
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If you feel your problem is not being able to attain the "top speed" that the bike should be able to obtain then I'd suggest to list any modifications that have been made to the bike.
A stock bike is probably the fastest of the Valkyries (desmog not withstanding) and most (performance) modifications will affect the top speed in a negative manner.
Motor condition is the other part of the equation. It's not the same after ten or so years. May feel the same but realistically, it is not!
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2000_Valkyrie_Interstate
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jimmytee
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« Reply #16 on: October 19, 2012, 03:20:47 PM » |
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My speedo seems to be right on with my GPS,jus' sayin'  I've had my current valk over 120 |
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"Go sell crazy somewhere else,we're all stocked up"
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