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Old Sep 23rd, 2010, 10:45 am   #1 (permalink)
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clutch problems

out for a ride yesterday, nothing extreme at all. about 2 hours into the ride on highway 1 the clutch lever gets really hard, meaning the lever can't be pulled in at all. i had to bump start it after i pulled over and hobbled to the closest town.
i got the bike towed to the shop, where i will find out whats up with the clutch.

concerns:
is bump starting your bike bad - can it damage the motor or gearbox?

what i learned you can only bump start the bike in second or third gear and you have to be rolling at least 10mph. i had to push the bike up 2 hills in order to be finally successful at starting it.

i have the yoyodyne clutch slave installed.
tech said initially that it was hydraulic lock?


anyone experience something like this?
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Old Sep 23rd, 2010, 10:55 am   #2 (permalink)
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What is a bump start?
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Old Sep 23rd, 2010, 12:13 pm   #3 (permalink)
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Questions...

why would you have to bump it? Is it stuck in gear? or when you pull the clutch in, it wont engage enough to make it so you can shift?

Typically, when you cant pull the lever in all the way, you have water in the system, and it has expanded and wont allow the piston to compress. This also usually means that the reservoir is too full, and is not allowing the expansion...

but im really curious why you have to bump it.

And no, bumping it wont hurt ANYTHING.... No different than starting a bike on rollers, etc
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Old Sep 23rd, 2010, 1:13 pm   #4 (permalink)
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bump start

Quote:
Originally Posted by RetroSBK View Post
Questions...

why would you have to bump it? Is it stuck in gear? or when you pull the clutch in, it wont engage enough to make it so you can shift?

Typically, when you cant pull the lever in all the way, you have water in the system, and it has expanded and wont allow the piston to compress. This also usually means that the reservoir is too full, and is not allowing the expansion...

but im really curious why you have to bump it.

And no, bumping it wont hurt ANYTHING.... No different than starting a bike on rollers, etc


the clutch would not egage at all - so i had to bump start it in 2nd so that i could get going. the clutch lever was not functional at all. i could start it in neutral but shifting was no an option
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Old Sep 23rd, 2010, 1:15 pm   #5 (permalink)
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bump start or rolling start

Quote:
Originally Posted by RetroSBK View Post
Questions...

why would you have to bump it? Is it stuck in gear? or when you pull the clutch in,
it wont engage enough to make it so you can shift?
exactly the problem.
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Old Sep 23rd, 2010, 2:04 pm   #6 (permalink)
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Don't mean to be overly technical but just an FYI... The clutch is always engaged and transferring engine revolutions through to the transmission.

When you pull the lever you are disengaging it.
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Old Sep 23rd, 2010, 4:47 pm   #7 (permalink)
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since you pushed it to the top of a hill anyway, what you could have done is start the bike in neutral and then get it going down the hill...when you got to 10 mph, THEN just put it into second gear without any gas on...should go (it'll be a bit rough) but you can then get to town...I'd only fiddle with bump starting if I had a dead battery...unless you do this constantly, you might not want to be too hard on your transmission, but one or two shifts like that won't kill it (as long as you don't have power on)
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Old Sep 23rd, 2010, 11:07 pm   #8 (permalink)
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Again...What is a bump start? Hitting it with an SUV?

Inquiring minds want to know!
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Old Sep 23rd, 2010, 11:59 pm   #9 (permalink)
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It's a push start, nothing to do with SUV's or homo's.
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Old Sep 24th, 2010, 4:25 am   #10 (permalink)
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I've been upshifting w/o clutch for years and never had a problem.

Preload the shifter, let off the gas, upshift and the bike just snicks right into the next gear.

Spinner - seems like your problem stems from your clutch mod and not the SF
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