Thanks , kinda what I expected in some sense, I already have the pistons and done the squish, its good, with a little work to be done on matching up to the transfer at BDC. I get the answer for the deflectors thanks, Ill leave them alone but I can not (RC valves) see how power will be lost ? A bit of tractability maybe but not power when your on it. Once again correct me if I'm wrong but don't the RC vales only operate between 0 and 2500rpms? Any way we will dyno it and find out. ....I do take your point Andy, why fiddle about, and how much will be gained, can't help myself I suppose.

My clubmate did similar mods to an RGV and has it doing nearly 80hp. ... dyno tested, with NSR tyga chambers, bumped compression and some experienced porting, running a capsitor instead of a battery with a KX 125 gen and rotor.on pre mix, no air bleeds no exhaust valves, and it goes like stink, though it did, just nip a rear piston last time out.

I also inetnd to run CR125 Vforce reeds, and if possible CBR600 41mm cartridge forks. And if I still have the cash after getting a crank built, either a ohlins or a zeno in the rear.