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Post by barry1013 on Jul 20, 2012 14:03:00 GMT -5
Once I start moving, my Jonway YY250T vibrates, jumps and bumps till I get to about 15mph then it's smooths out and all is good. It doesn't do it when it's cold but after the bike has warmed up. It feels like something is not lined up right till it'd reaches certain speed.
Any Ideas..?
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Deleted
Deleted Member
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Post by Deleted on Jul 20, 2012 14:15:57 GMT -5
im having the same issue, there is another threat on the subject, i just got done writting the dealer an email i have the same exact scooter 2011 jonway yy250t 3 weeks old and is doing that, but only after is warmed up, when is cold it doesn't vibrate as much.
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Post by WarrenS on Jul 20, 2012 16:14:18 GMT -5
If it runs rough after it warms up at low speeds it could be running too lean on the low speed jet. It may not be able to be adjusted. The newer ones are made unadjustable. A different carburetor may help.
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