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Old 01-21-2007, 02:17 AM   #1
FMYStreetRacer   FMYStreetRacer is offline
 
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Clutch slipping?

my Roketa's clutch has been slipping when the motor is cold ever since i got it. i was hoping it'd go away but it's still doing it. any one else have this problem? any idea what could be wrong?


 
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Old 01-21-2007, 04:10 AM   #2
CathastrophiX   CathastrophiX is offline
 
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Are you using motorcycle engine oil?
Since bikes normally have wet clutches it´s important to use the right type of oil to avoid slippage.
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Old 01-21-2007, 08:20 AM   #3
ob1   ob1 is offline
 
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Is it adjusted properly? About 1/8th inch freeplay at the lever?


 
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Old 01-21-2007, 09:57 AM   #4
FMYStreetRacer   FMYStreetRacer is offline
 
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yes and yes. i am useing vavoline 10/40 motorcycle oil. i also unadjusted the clutch and then readjusted it. it was ok. it only does it when it's cold. if it's hot the clutch grabs fine.


 
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Old 01-21-2007, 12:33 PM   #5
Ferrit   Ferrit is offline
 
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Isn't that backwards? Don't they normally grip cold and slip hot??? Maybe they put the clutch pack in backwards or a spring(s) is not seated properly.

I'll be curious to see what is causing it so please keep us posted.


 
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Old 01-21-2007, 03:38 PM   #6
FMYStreetRacer   FMYStreetRacer is offline
 
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that's what i thought. i know in my car with the old organic disk when i turned up the boost and had the drag radial on the clutch slipped. and the more i kept on it the worse it got til it cooled down.
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Old 01-21-2007, 04:27 PM   #7
fatboy250   fatboy250 is offline
 
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Sorry to disappoint you but Dad and I have come to the conclusion that the clutch springs are just weak. They lack the appropriate clamping force to do the job all the time. Sometimes the engines and clutches do fine, but other times when riding it hard they will slip in 5th, 4th, sometimes even 3rd. Ours have been adjusted and motorcycle oil filled, but to no avail. I figure when there is good cause to go into the engine, I'll just replace the springs.
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Old 01-21-2007, 04:34 PM   #8
FMYStreetRacer   FMYStreetRacer is offline
 
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mine doesn't do it when riding hard though. i can be beating the shit outta it (i just got done do this a little bit ago) and the clutch holds fine. but when cold, a little too much throttle and she slips.
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Old 01-22-2007, 08:55 AM   #9
fatboy250   fatboy250 is offline
 
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Mine may have more to do with the weight of the rider :roll:
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Old 01-22-2007, 10:00 AM   #10
Roketarider   Roketarider is offline
 
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I have noticed I have to let my clutch lever out the whole way to get mine to engage.
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Old 01-22-2007, 06:56 PM   #11
FMYStreetRacer   FMYStreetRacer is offline
 
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yeah mine releases right at the end as well. it got better as i broke it in though. i just made sure that the release lever on the motor was still able to be fully released and it was. i still tinkered with it though. i just got done climbing a little hill that was kinda steep. i was in first gear and had it floored and it almost stalled instead of the clutch slipping.

anyone know what the flywheel looks like? is it stepped like a car? maybe i could have a few thousands machined off and that would provide better clamping force?
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