bj wrote:i should have mentioned that there's not much you're legally allowed to do engine performance modifications wise. can't touch engine internals, basically all parts must be from roadgoing versions of the same make/model. The rules are a lot different to the formula 250 series you have over there. the 250's are lapping about 10 sec a lap + slower than 400's on a 1:50 track
Maybe, but the front running NSR in F250 is an all but std bike, he ran (with under 60bhp) within 2 seconds a lap of a claimed 90+bhp FZR400, a couple of heavily modded (80+bhp) ZXR400's and a real RS250 GP bike.
On a very similar spec bike I was 10+ seconds per lap back
I've said it here before and I'll say it again, at normal club level a good rider can put a std bike pretty much on the pace.
Even at World Supersport level all their mods are only worth about 3 seconds a lap (The R6 cup is std bikes, WSS is massive money mods allowed they're not that much slower, ditto Superstock compared to WSB).
After all there's only around 10 seconds between the 125's and MotoGP bikes, if in your races a standard 250 is 10 sconds behind a standard 400 the 250 rider is to blame or the 400 rider is Valentino Rossi.
Anyway a std piped, std ignition NSR is good for 60+bhp.
You'll get better mid range with an airbox with a couple of 1" holes in the lid but a couple of bhp more at the top with open carbs or the lid off or pods. Horses for courses really.
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