i recently bought another shee with quite a few mods already done to it and it came with pwk 36's already on and ive had a few ppl say their way to big for the mods (mods are in my sig) but it starts first kick, idles perfect and goes like a stabbed rat right upto the limiter, ive not had to touch a thing on them since i bought it, although i have just rebuilt the top end as a precaution as i was getting a bit of piston noise, so it'll be even faster now