Have noticed a number of posts on this subject but not one from someone who is actually running one as a road bike. Maybe no-one is, in which case what about as a track bike. Realize piston weight is a problem for the race boys and therefore they prefer Cosworth pistons but as road only option thought the increased capacity and CR might give a useful mid range torque increase.

Ive spoke to someone that had the kit fitted to a NC29, not a lot of difference up top but a decent increase in the midrange. Im tempted at the price.

Thanks Drunkn Munky, the answer I was hoping for. Top end power not an issue just after more mid range that can be used on the road. Was the NC29 a road or track bike do you know?

Road bike, occasional trackday use.

Thanks again.

Rick uses one of these kits in his NC30 does he not?

An update that maybe of interest. Have spoken with RO and he has does have big bore NC30s, a 444cc and a 490cc. 433cc version no longer available because the Kawasaki sourced piston rings are no longer available. With the 444cc option there is no need to re-sleeve where as the 490cc requires a re-sleeve and would be more expensive but obviously has more performance.

RO says: " I used a 444 engine for several years in my NC and the 490 is the same only more so - very tractable with serious lumps of midrange for a little bike. It is without question the best NC engine I have ever ridden...".

490cc talk to me. Where, how, price?

It is a TTS Performance kit for which I am awaiting a quote although because I will be doing the re-sleeve and engine rebuild over here in oz, it will be different for anyone getting TTS to do the re-sleeve and/or the engine rebuild, etc in the UK. You should drop a line to Paul, paul@tts-perfprmance.co.uk, with your requirements. The more the merrier.

You should also spell "perfprmance" correctly when you address your e-mail and not the way I have in my earlier post.