zxr 250/400

[Tomc]

hi

i have been told by several people that a zxr 400 motor will bolt straight in to a zxr 250c frame. anyone know how true this is? what else would need changing? any help appreciated

cheers Tom

[hmmmnz]

bikes arn't mecharno... but who knows, ive seen a zxr400 to 750 conversion

[Laxi]

the question is why? when you can buy a 400 for the same price and in many cases cheaper than a 250. 250s are dear because any learner is (supposed) to have 1, where as 400s are often passed up in favour of bigger bikes, so are harder to sell

[R6_kid:Me]

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i have been told by several people that a zxr 400 motor will bolt straight in to a zxr 250c frame. anyone know how true this is? what else would need changing? any help appreciated

I call bullshit on that one. Unless of course they can prove it?

If you did change it you'd need to take all the electrics and gauges with it, also the carbs and the airbox. Already I'm starting to think that the airbox/carbs won't fit under the tank... the gauges are interchangeable, you'd need the CDI and charging system. I'm not sure how separate the looms are, but I'm guessing you're going to have to strip the two looms to make it work unless you take the switchgear from a ZXR400 too?

As said, It'd be easier to just buy a 400, you'll probably find there isn't much of a weight difference anyway, and the suspension and brakes will be much better than on the 250.

[Laxi]

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you'll probably find there isn't much of a weight difference anyway, and the suspension and brakes will be much better than on the 250.

according to the manuals my fzr 400 weighs 7kg more than my old zzr 250, and i'm pretty sure zxr 250s dont have twin front discs like the 400, so yeah brakes are much better

[racefactory]

Actually they do have twin front discs. ZXR250 fair bit lighter (20kg) than the 400... Feels it too
It sounds impossible. Everything would have to be changed and then some.