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Old 05-01-2010, 01:35 AM
Saylork Saylork is offline
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Join Date: May 2010
Location: USA
Posts: 2
Default Clutch problems...


I have a new two stroke engine, that has thus far made a great project. I've got about 30 miles on it with no problems. However, the other day I rode it to work, ran great... Got to work, and 30 minutes later fired it up again to show a coworker, worked great.

After a six hour work shift I came out and my bike would not start, period. It was easy-esh to peddle even with the clutch enganged... which seemed unusual. Either way, I disengaged the clutch and peddled it home.

Checked the spark, solid, checked the wires, solid, checked the chain, solid. Everything looked good, engine turns over with no spark plug present, but under compression she wont turn.

I went to examine the clutch, took the pressure plate off, cleaned off all the gears of any present grease, roughed up the pads and the plate a-bit. I viewed the various threads on adjusting the clutch, so I tightened my inner spring, and have been playing with the "flower nut".

The problem seems to be, when I disengage the clutch, the pressure plate drops onto the pucks but it still spins against them, so the bigger gear does not turn, thus no turn over. The big gear may turn a few interspersed rotations from time to time. The interesting thing is, when I am peddling fast and I drop the clutch it spins free against the pucks, but right as I get very very slow the pucks seem to grab and the engine will fire - sometimes.

Tonight I bought break cleaner and will be trying that to see if it works, and I have also ordered a new sett of clutch pucks (mine is the round style).

Any help on how to adjust this properly so it works right would be appreciated. I just don't understand how it was wondering fine, but after a cool down period the clutch was slipping.

Thanks guys, I appreciate it.
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Old 05-01-2010, 04:56 AM
Bikeguy Joe Bikeguy Joe is offline
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Join Date: Jan 2008
Location: up north now
Posts: 11,531
Default Re: Clutch problems...

Sounds like you've done all the right things....are you really heavy on your clutch (do you slip it a lot?)

What exactly did you do to the flower nut?

Did you do everything all at once then put it together and no go?
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Old 05-01-2010, 10:28 AM
Saylork Saylork is offline
Motorized Bicycle Newbie
Join Date: May 2010
Location: USA
Posts: 2
Default Re: Clutch problems...

Yeah, I did all the adjustments at once... In hind sight I should have taken it more liberally, but that's not my style.

I tightened the flower nut in (clockwise) while I has the clutch lever pulled in.

I'll be working on it again today to see if I can come up with something... Maybe some how I have the inner spring too tight?, or the flower nut in too far?
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