0105
2nd Class Ticket
Posts: 49 
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Post by 0105 on Jun 2, 2017 9:24:01 GMT
Hi people, I've got some bad top end rattle (at least that's what I think it is) coming from the scoot when I try to either accelerate in 4th and I should really be in 3rd if that makes sense and when I'm flat out in 4th, what would be causing this? Ring gap? Loose piston? Any help appreciated
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Post by henri on Jun 2, 2017 16:07:51 GMT
little end/gudgeon pin bearing maybe ,without hearing it hard to guess . a "rumble" is main bearings , top end under load can be detonation or little end . H
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0105
2nd Class Ticket
Posts: 49
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Post by 0105 on Jun 2, 2017 20:21:49 GMT
I was thinking detonation but the timing hasn't been touched (to the best of my knowledge) I'm really struggling with this scooter now got it as its only done 900 miles from new but I'm having problem after problem, 😩 I noticed I've got black smoke coming from the exhaust on tickover also, could this be burning gear oil? ( oil seal gone)
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Post by scooterg on Jun 2, 2017 23:03:05 GMT
I don't know enough about the scooter engine,,so do what I done
Find someone who does ,,Theres always another scooter guy who would be glad to help
For about quarter the garage price,or less,,
Stick on here where you are and I'm quite sure someone will help
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Post by pxguru on Jun 3, 2017 7:09:55 GMT
Gearbox oil is normally more white smoke than black.
The mixture screw is probably just too far out.
In most cases detonation is caused by jetting
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0105
2nd Class Ticket
Posts: 49
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Post by 0105 on Jun 3, 2017 8:19:07 GMT
Is 1 turn of the mixture screw classed as a full 360 degree rotation, I'm also getting a rattle when flat out in fourth, could this be caused by the mixture screw?
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