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Hi there, we have a fix for the surging so don't worry, and let me explain why does the bike surge, well Yamaha built a single cylinder bike with a very restricted air box and air intake in general, the way to stop the bike surging is by allowing more air into the a/f mixture and for that there is a procedure on the bike's clock that allows you to alter the co1. Also we like to remove the snorkel which is situated on top of the airbox and the ultimate way is to fit a Kev Mod which was designed by Kev our in-house mechanic expert. Also fitting a stage 2 DNA filter opens the air box even more and give thge bike a substantial hp kick.

But click on my first signature line to find out all about these tricks and by the time you've finished reading your confidence will be reassured.

Enjoy the forum, we are here to help so when in doubt, ask.