C90 mods..

[S1OPP]

Don't get too worried abou a disc brake. A drum will do you just as good.

We have one bike with a disc and one with a drum, and there's not much in it.

Anyway, Forks.

The forks off a CB100 will fit straight on with no mods. Problem you'll have is getting a MX tyre for the front wheel (can't remember the size, but we struggled.) Choice is to fit the C90 wheel to the CB fork, but you'll have to do some welding to make the brake work, and fabricate a spindle. OR, take the wheel to a wheel builder and get a C90 17" rim put on it.

Or, if you look hard enough you can find other bikes that fit, I used a SL125 of eBay (as scrap) and the whole front end bolted straight on.

The forks off things like a XL125 /185 should fit too.

But you may have to shorten the steering tube.

Forks of proper motox bikes can be made to fit, but they varied so much from year to year it's har to be specific, if your thinking of buying any, I'd take the measurements from the C90 along to check against.

Failing that you can always either modify the triple clamps, or weld the entire headstock to the C90 frame. The triple clamps job is a little more skillful but less likely to fall apart.

If you do a search for the purple helmets, they have a forum, and there's always lots of questions about forks on there (I think they used KX forks), it's worh a look.

[von41]

OK s1oop...thanks for your advice and tips....spanner time

[von41]

Hi s1opp I'm back..

could you tell me whether its best to stick with standard air box or not ?
only akey was thinking of fitting a K&N filter... but I've suggested to stick with the standard one...as it would act like a snorkel and keep water/crap/mud out....what do you recomend ?

thanks..

von.. team CTR.