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Post by elitemkd on Oct 12, 2017 15:38:14 GMT -5
I installed a new top end on my benelli quattro nove x49 from 50cc to 70cc with Gianelli Reverse exhaust (stock carb) but it wont start after 20 kicks its starts high rpm 8K then dies i noticed oil/gas leakage between the cylinder and engine block where the base gasket im a first time builder tell me what i did wrong thanks !   |
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Post by spaz12 on Oct 12, 2017 15:45:42 GMT -5
Welcome to the forum  Sounds like you will have to pull it back apart and find out why it didn't seal up right. Maybe a gasket curled up, or moved? And with it not being sealed you have an air leak, which two stroke motors don't deal well with. Also, you might need to use some grey permatex, like Yamabond, or similar. |
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Post by elitemkd on Oct 12, 2017 16:09:00 GMT -5
Welcome to the forum Sounds like you will have to pull it back apart and find out why it didn't seal up right. Maybe a gasket curled up, or moved? And with it not being sealed you have an air leak, which two stroke motors don't deal well with. Also, you might need to use some grey permatex, like Yamabond, or similar. can the oil pump is cause fitment issues with the new cylinder ? |
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Post by spaz12 on Oct 12, 2017 16:39:15 GMT -5
Welcome to the forum Sounds like you will have to pull it back apart and find out why it didn't seal up right. Maybe a gasket curled up, or moved? And with it not being sealed you have an air leak, which two stroke motors don't deal well with. Also, you might need to use some grey permatex, like Yamabond, or similar. can the oil pump is cause fitment issues with the new cylinder ? Is that a jog style motor? I think I've read somewhere that some motors, but I believe Morini style motors, have clearance issues with something and that a fin needs to be ground down. I don't know of this issue on a Jog style motor. |
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Post by 190mech on Oct 12, 2017 16:56:14 GMT -5
Minarelli clone motors will have oil pump crashing problems with 70cc cylinders,many will need metal removed at the transfer duct and cylinder finning,if not done the oil pump will be broken and the cylinder base will not seal..  |
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Post by spaz12 on Oct 12, 2017 17:03:34 GMT -5
And there ya go, the answer from our local guru  |
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Post by pinkscoot on Oct 12, 2017 17:25:43 GMT -5
Another good reason to premix.
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Post by repherence2 on Nov 18, 2017 17:31:37 GMT -5
Another good reason to premix. --no premix for me, oil pump all the way. You just need to adjust the cable...unless your motor revs beyond 10k all the time. Oil injection is just so much easier than premix...provided he has a Dremel to clearance the fins. I had to do that on my Motoforce mid-race bore and it ran well with the oil pump cable adjusted. |
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