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› Thumper Problems..........
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Thumper Problems.......... (Read 626 times)
Serowbot
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OK.... so what's the
speed of dark?
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Re: Thumper Problems..........
Reply #15 -
03/20/09 at 17:12:57
black smoke, is too much gas...
blue/gray, is burning oil....
white, is water/condensation in the exhaust...
check the petcock vac line for gas,...should be absolutely none....
check the carb float,...may be sticking....
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Ludicrous Speed !... ...
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Rion
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Re: Thumper Problems..........
Reply #16 -
03/25/09 at 14:51:15
I am still having problems with my bike. It is still idling uneven and puffing out small amounts of darker smoke.
I checked the spark plug and it was "carbon fouled" so I replaced it and that helped the idle (for a day), but now it is uneven again. I checked the spark plug chart and it says "carbon fouled" plugs are due to being too rich, so I was wondering how to resolve this problem.
Any help would be appreciated as it is too nice here Cali to NOT be riding!
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Rion
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Re: Thumper Problems..........
Reply #17 -
03/25/09 at 14:54:13
Is there a way to check the float without taking the carb off AGAIN? I took it off the other day and it still looked very clean from the time I cleaned it.
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cowspotter
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Re: Thumper Problems..........
Reply #18 -
03/25/09 at 16:19:45
Have you checked the vacuum line coming off the petcock? The petcock could be bad, sending gas into the vacuum line causing the engine to run rich.
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Rion
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Re: Thumper Problems..........
Reply #19 -
03/25/09 at 17:05:28
yes, i have checked the vacuum hose and it is dry.
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verslagen1
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Re: Thumper Problems..........
Reply #20 -
03/25/09 at 18:08:24
Does your carb have a drain teet?
put a clear line on and hold it up next to the carb.
open the drain on the bowl.
and set the petcock to prime.
gas should come up in the line even with the bowl gasket.
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Rion
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Re: Thumper Problems..........
Reply #21 -
03/26/09 at 14:00:36
what does it mean when the fuel isn't at the same level as the float?
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verslagen1
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Re: Thumper Problems..........
Reply #22 -
03/26/09 at 14:06:26
Rion wrote
on 03/26/09 at 14:00:36:
what does it mean when the fuel isn't at the same level as the float?
You got a leaky float or your float has sunk or is stuck.
does the fuel shut off? Then it floats.
Is the fuel level low? readjust the the tab for the shut-off.
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Digger
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Re: Thumper Problems..........
Reply #23 -
03/26/09 at 21:07:36
Rion,
Here is a good test of your petcock:
Crimp the petcock line completely shut. I mean completely.
Run the bike with the petcock set on PRI. If your problem clears up, then that points to a bad petcock diaphragm.
Good luck!
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Digger
2001, Metallic Glacial Blue, Raptor Petcock, Verslavy (first hole) (otherwise, mechanically, the bike is stock), 13,xxx miles
I don't own a cage.
www.astronautbiker.com
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Rion
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Re: Thumper Problems..........
Reply #24 -
03/27/09 at 15:46:45
Well I have tried the Petcock idea and there was no improvement. I also put a clear tube on the drain hole and the fuel level comes even with the top of the float bowl.
Not sure what else to do, Please if anyone can help, I need it!!!
It's GORGEOUS outside!!!!!
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diamond jim
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Re: Thumper Problems..........
Reply #25 -
03/27/09 at 16:23:21
Let's see:
Running rich with hesitation during acceleration
Petcock- good
Floats- good
Air- good
Spark- good
I'm assuming nothing clogged up the tail pipe. So that just leaves dirty carb (again) and something seriously wrong with the engine. Hmmm... so why did you have to clean the carb 2 months ago?
My money is on a carb problem. likely a dirty pilot air jet. Other possibilities are worn main jet,/needle or slide vacuum hole plugged (rare) not functioning properly creating excess vacuum and pulling the slide up too early.
I don't think you've mentioned any carbs mods done. Have you done any?
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Rion
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Re: Thumper Problems..........
Reply #26 -
03/27/09 at 18:30:31
I don't know but it appears that the white spacer is thinner than stock.
spark plugs are carbon fouled
I cleaned the carb last time due to running out of gas and not being able to start it afterwards. I checked the carb a few days ago and it looks very clean
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Re: Thumper Problems..........
Reply #27 -
03/27/09 at 19:50:36
diamond jim wrote
on 03/27/09 at 16:23:21:
Let's see:
Running rich with hesitation during acceleration
Petcock- good
Floats- good
Air- good
Spark- good
Hesitation as in twist the wick and nothin' happens for a while?
Sticking slide.
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diamond jim
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Re: Thumper Problems..........
Reply #28 -
03/27/09 at 20:08:22
verslagen1 wrote
on 03/27/09 at 19:50:36:
diamond jim wrote
on 03/27/09 at 16:23:21:
Let's see:
Running rich with hesitation during acceleration
Petcock- good
Floats- good
Air- good
Spark- good
Hesitation as in twist the wick and nothin' happens for a while?
Sticking slide.
Sounds similar to oldfeller's description:
"I have mentioned some "wonky" running characteristics from getting Mazola oil transferred from your oil laden dust trapping air cleaner to your constant velocity vacuum actuated carburetor slide.
When this happens you get slower response to throttle off changes and generally rich running condition as your slide movement is always responding slowly and is always behind the power curve so to speak."
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verslagen1
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Re: Thumper Problems..........
Reply #29 -
03/27/09 at 20:23:20
diamond jim wrote
on 03/27/09 at 20:08:22:
verslagen1 wrote
on 03/27/09 at 19:50:36:
diamond jim wrote
on 03/27/09 at 16:23:21:
Let's see:
Running rich with hesitation during acceleration
Petcock- good
Floats- good
Air- good
Spark- good
Hesitation as in twist the wick and nothin' happens for a while?
Sticking slide.
Sounds similar to oldfeller's description:
"I have mentioned some "wonky" running characteristics from getting Mazola oil transferred from your oil laden dust trapping air cleaner to your constant velocity vacuum actuated carburetor slide.
When this happens you get slower response to throttle off changes and generally rich running condition as your slide movement is always responding slowly and is always behind the power curve so to speak."
My experience comes from good ol' natural creationist dirt. His dirt is artificial, un-natural, darwin type dirt. I wouldn't trust it.
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