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Post by 50scoot on Jul 26, 2013 18:48:44 GMT -5
So the other day I was taking my clutch bell off to clean out the friction material dust just as a periodic maintenance an upon taking the nut off I noticed that the threads on the end of the shaft were stretched farther apart in one section. They were stretched in the lefty loosy direction like my impact gun twisted it off on reverse. I always put some blue loctite on as added security and never thought anything of it, anyways I went to put the nut back on figuring it was probably gonna break and sure enough it snapped right off on the first blow of the impact gun. Mind u this is a 3/8" impact gun I set on the lowest setting with a teasable trigger so it was meant to break I guess.
So now I'm in need and cannot find the clutch output shaft that has the correct tooth count on the gear side. It is 155mm long, 22count splined end, 15 teeth on the gear end. All the ones I see are for 16 teeth. Called scrappy and mainely scooters and they said give the forum a try as they don't have access to the shaft I need.
Does anyone have one to sell or know where I can buy one online?
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Post by geh3333 on Jul 26, 2013 21:34:24 GMT -5
i have an extra engine layin around i can check tomorrow morn for you and see if its the one u need.
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Post by geh3333 on Jul 26, 2013 21:35:41 GMT -5
what size engine ?
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Post by 50scoot on Jul 26, 2013 23:06:36 GMT -5
Sorry I guess that'd help, 139qmb 10" wheels, short case
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Post by scoots on Jul 26, 2013 23:10:19 GMT -5
i got a whole block with alot
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Post by 50scoot on Jul 26, 2013 23:52:39 GMT -5
I'll take the shaft lol, probably wanna verify with lots of measurements first. It's just a standard cheap Chinese scooter so I wouldn't think it's be that odd ball
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Post by geh3333 on Jul 26, 2013 23:58:05 GMT -5
i would imagine a 150cc long case wouldnt work.
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Post by 50scoot on Jul 27, 2013 0:14:33 GMT -5
I don't believe so, I checked one on PartsForScooters and the gear tooth count was right but he splines count was wrong
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Post by 50scoot on Jul 27, 2013 15:08:42 GMT -5
I suppose I could get the shaft with sixteen teeth but then I would have to change out the rest of the gears too. Has anyone ever had to do this lol??
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Post by 50scoot on Jul 27, 2013 16:36:26 GMT -5
If I get a 52 tooth counter gear vs my 53, and press the big gear off and put on my current one then it should mesh and be back on the road! Yea?
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Post by scoots on Jul 27, 2013 20:26:06 GMT -5
what u want for it?
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Post by 50scoot on Jul 28, 2013 1:31:14 GMT -5
What?
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Post by 50scoot on Jul 30, 2013 3:36:35 GMT -5
Anyone? No ones busted of these? Or had some 15 tooth oddball?
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Post by 50scoot on Aug 3, 2013 0:12:08 GMT -5
Ok guys so I ordered a new clutch output shaft and a new counter gear and when it all shows up I've calculated that I'm gonna have a overall gear ratio of 12.07:1 with the different tooth count vs 13.121:1 with the old gear combo.
Now can someone on here who's a little smarter than me tell me what kind of gain in mph I should theoretically see? Currently I'm pulling 35mph GPS verified at 8300rpms.
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