Ok, so i have a 1993 Yamaha dt50mx and i am going to fit a 65cc big bore kit and a full gianelli exhaust system (front pipe and silencer) and was wondering if i am going to need to re-jet the carburettor because of these modifications.

If anybody knows if i would need to do that and any problems i may have please let me know. Thanks.

Ok, so i have a 1993 Yamaha dt50mx and i am going to fit a 65cc big bore kit and a full gianelli exhaust system (front pipe and silencer) and was wondering if i am going to need to re-jet the carburettor because of these modifications.

If anybody knows if i would need to do that and any problems i may have please let me know. Thanks.

Yup, go up in stages of 5% higher, than the original size, , e.g if you have an .88, 5% would roughly take you to .92, and so on, then check by doing a plug chop, checking the colour of your plug, black meaning too rich white being too lean, you'll need a beige colour to be about there.