Good day Billy…
Q: Perhaps you can help? I have a Yamaha MT-09, nice to ride but every time I ride around town, between the 1500 to 3000rpm range, the bike tends to ‘surge’.
The sound from the exhaust doesn’t change but there’s a noticeable change in speed, as if something is grabbing and releasing. I’ve had the throttle bodies synchronized, but still with no change. I’m now thinking of mapping the ECU – any advice?
Phillippus Opperman.
A: Before you go up that expensive path there is one thing you can check that riders tend to forget. Buy a decent fuel-injector cleaner and put it in to the petrol tank, these can sometimes remove deposits from the injectors that could cause your irritating problem.
Does the bike still have, or did, the ‘power-valve’ installed. If set incorrectly that could also have this affect?
Try these recommendations first and let us know if it makes a difference?
BillysBikes.co.za
