Quote:
Originally Posted by jrshooter
are you looking at a 350 2 stroke motor for this build?
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Sorry I missed this question. Yup, I got used NSR250R MC21 frame & gullwing swingarm.
Frame & swingarm arm are more optimised for track than overbuilt Ninja 250 frame. It doesn't have to ever carry passenger, so it weighs 1/2 as much (frame+swingarm is over 30lbs lighter!). Yet is stiffer vertically and softer laterally.
Then installing stock RZ350 engine for 60bhp (had to chop frame little bit). My main concern with original plan to buy RS250R was maintenance schedule. So I chose engine with great power-to-weigh ratio that can go at least 10k-miles between rebuilds. It weighs less than Ninja 250 engine and puts out TWICE as much power.
There's incredible aftermarket support and I can upgrade to 100bhp easily. Best news is every single part of engine, even crank and cylinders have aftermarket replacement! So I can build an engine from aftermarket parts if needed!!!
So target for 1st iteration is 60bhp @ 260-280lbs (i've backed off from CF wheels). Then next step in year or so is 100bhp @ 240-260lbs.