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Post by millsc on Sept 26, 2013 20:32:18 GMT -5
I have a customer that wants a big bore kit on a vento zip 139qmb-3 motor can't find parts for this, it has a 4 stroke motor with 2 stroke transmission. Is it even possible to upgrade this scoot and if so what parts fit in it?
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Post by sailracer on Sept 26, 2013 21:51:32 GMT -5
I had one of those. It's a QJ139qmb right. The clutch shaft has an outboard bearing?I think scrappydog has some parts for that maybe bajamotorsports has some leftover parts. I swapped mine to a regular qmb 139,and never looked back.You should suggest he do the same. QJ or quingjang motors are hard to find parts for Besides that, I'm pretty sure you have to modify the case too
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Post by millsc on Sept 26, 2013 21:53:59 GMT -5
Ok didn't think I could upgrade it and yes its a QJ139qmb
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Post by teddy554 on Sept 26, 2013 22:45:38 GMT -5
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Post by millsc on Sept 26, 2013 22:58:33 GMT -5
Wow guess I have to tell him the bad news
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Post by skuttadawg on Sept 26, 2013 22:59:46 GMT -5
I thought the Vento Zip was a 2T ? What makes you think it has a 2T tranny with a 139QMB engine ?
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Post by skuttadawg on Sept 26, 2013 23:26:13 GMT -5
Hope this helps
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Post by millsc on Sept 26, 2013 23:58:44 GMT -5
It's a four stroke with 2stroke tranny I took it apart
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Post by millsc on Sept 27, 2013 0:00:30 GMT -5
Same scoot teddy put pics up
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Post by sailracer on Sept 27, 2013 0:26:25 GMT -5
Yeah Thats The one! It don't need a special carb, and its a pretty good little motor when it runs right, Just hard to get parts and that outboard clutch shaft bearing is a painin the a--
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Post by millsc on Sept 27, 2013 8:15:43 GMT -5
I think ill pass this job up
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jet
