surffly said:
A company which makes a lot of aftermarket parts for pit bikes and small cc dirt bikes.
surffly said:
They have the same axle diameter and many of the parts like the wheel, spacers, steering bearings, etc. can be reused minimizing cost.
surffly said:
Cb350 forks are cheap and larger.
A good set of XR100 forks can be found on eBay for $70-$80. It looks like CB350 forks are about the same. However, the CB350 forks appear to be external spring while the XR100 are internal spring. I personally prefer the internal spring type.
Larger does not mean better. Larger (and also stiffer) forks will transfer more of the load to the frame. This will expose any of the inherent flaws in the CB100 frame. The CB100/125S was designed with flimsy 27mm forks in mind. It's best to keep the forks close to this diameter. 33mm is in my opinion too large for these little bikes.
There is the problem of the 15mm axle diameter for the CB350 forks. This will mean a new wheel. Also, there is no steering stem bearing kit available to readily mount a set of CB350 forks into a CB100 frame.
It looks like bud is trying to do something to the front end with the least cost and modification possible. While a CB350 front end is a possibility it (to my knowledge) hasn't been done. The XR100 front end offers a lower overall cost because of the parts which can be reused and has been proven to work by simply swapping the triple trees/bearings and popping in the forks.
Edit:
It looks like an XL125 or XL185S steering stem could also be used if 31mm forks were wanted. This opens up a few more options in terms of forks and possibly even a more modern hydraulic disc brake setup from a '94+ CB250 Nighthawk. I'd love to see someone do that. Best of luck bud!