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Post by dude on May 1, 2011 10:26:11 GMT -5
The key that hold the rotor are they the same on 2stk's and 4stk's? 50cc
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Post by 90GTVert on May 1, 2011 10:37:29 GMT -5
I think they are the same width, but the 2T is taller and not as long. If there's some reason you can't wait to get parts, you can try a hardware store. They usually sell woodruff keys, not sure if any will work for this. You could also install the flywheel without a key. I did that on the SunL to get it in time and it stayed in place once tightened. Just gotta be careful installing it.
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Post by dude on May 1, 2011 11:07:00 GMT -5
I seen a off set advace or retard key for a 2stk. Thinking about retard for 4stk NOS set up on J's scoot.
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Post by 90GTVert on May 1, 2011 12:16:35 GMT -5
Just leave it out and install the flywheel wherever you want then. That would be the easiest and cheapest way. The taper will hold it in place, you just won't have the luxury of sliding the flywheel on without looking. Gotta get out a degree wheel or just guesstimate it. There's also the option of elongating the moutnting points on the pickup to allow you to move it.
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Post by Fox on May 1, 2011 21:32:34 GMT -5
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Post by Enviromoto on May 1, 2011 22:05:19 GMT -5
Thats a good idea brent, you sure the flywheel wont spin?
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Post by 2strokd on May 1, 2011 22:26:58 GMT -5
yeah, he has done it before, it will stay put. Maybe a bad backfire or something might move it?
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Post by lshigham on May 2, 2011 3:49:33 GMT -5
I know where you can get 5x2mm offset keys - does anybody know what size the 139QMB ones are?
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Post by 90GTVert on May 2, 2011 6:55:42 GMT -5
From PFS : "Length: 12.9mm Width: 3mm Height: 2.5mm" And yes, like Robert said, I did it because the SunL's flywheel was 21 degrees off of TDC thanks to Chinese quality control. Worked fine. I'm sure it's possible to move in an extreme circumstance, but I'd trust this way and the timing I want more than stock timing and nitrous.    |
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Post by Enviromoto on May 2, 2011 14:41:13 GMT -5
Cool tip, Ill try it.
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Post by rocketdog on May 2, 2011 16:51:30 GMT -5
LOL I love your pointer GT. Looks like mine. Oh, if you folks don't have a wheel here's a free one. Cut out a cardboard circle with a compass, or whatever, and there ya go. www.tavia.com/free_degree_wheel.htmlRD |
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Post by 2strokd on May 2, 2011 20:26:06 GMT -5
Thats what i use! An old cd makes for a good backing plate
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Post by Thebatman on May 2, 2011 20:34:52 GMT -5
I know another guy on a forum, that has 3* off set keys for the aprillia scooters. Those are either morini, piggy engines mostly but the key MAY be of the same size... Ppl there swear by those 3* keys.... :stumped: ..(i will be ordering one for the sr50 soon i hope...lol)
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Post by dude on Jul 21, 2011 23:51:52 GMT -5
Something I never knew was the cam shaft gear is just pressed on. so it can be off by a few degrees. J found a adjustable timing gear that you press on where the stock gear was. Which means you can press the stock gear off then press it on at different timing postion.
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The only ones I see are all for pocket bikes/Goped type engines.
