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Post by matthewwhitaker on Aug 8, 2019 17:28:24 GMT -5
Hello I wounder what is the largest bore can I put on a stock crank or what crank can I use without much change I would like a 90cc but don't want to bore the cases to much thanks Matty also where could I get parts from
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Post by 190mech on Aug 8, 2019 22:56:54 GMT -5
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Post by matthewwhitaker on Aug 9, 2019 11:28:16 GMT -5
I don't mind bore the case for a cylinder where would I get the cylinder and studs thanks matty
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Post by 190mech on Aug 9, 2019 11:57:43 GMT -5
Sorry dude,I just reread both of the crankshaft descriptions and they say 10mm piston pin,so that rules out all the 90cc cylinders!!   |
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Post by matthewwhitaker on Aug 9, 2019 19:59:32 GMT -5
Dam so what could I do put a 70 on with profomace transmission?
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Post by 190mech on Aug 9, 2019 22:44:48 GMT -5
There are tons of good 70cc cylinders out there!Best to spend a bit more and get a name brand..Be sure it comes with the head also...
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Post by aeroxbud on Aug 10, 2019 23:34:22 GMT -5
If you intend using the standard crank, how many miles does it have? A high miles crank and racing cylinder is asking for trouble.
Some of the 70cc kits make good power. But anything more than a stage 6 street race, I would change the crank. If it's a high mileage engine, probably not even that kit.
What are your specific goals in wanting the larger cylinder?
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Post by ThaiGyro on Aug 11, 2019 7:17:03 GMT -5
Your alternative? The best new crank and CVT bearings you can afford. Not OEM replacements, but lower resistance. (We are playing with ceramic/SS hybrid bearings) Then do the cylinder. I enjoy running two strokes until they BLOW! (Not really, but edging close is good!)
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Post by matthewwhitaker on Aug 19, 2019 19:14:50 GMT -5
Hello guys I've found a 100 MINARELLI ENGINE out of a aprilla thanks for your help and I've taken my 50 apart to modifi what can I do wit it thanks matty
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