CB400F Yoshimura Racer
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Quite a few years in the making. My CB400F Yoshimura Racer

So what brings me to modify a motorcycle that is 30 odd years old you might ask, it all started in 1975 when I was living in the uk and Honda brought out the CB400F, I had to have one. I still own the very same bike today.  The cafe racer scene was all the rage and it wasn't long before I had transformed the little four into a yoshimura 460 with Rickman bodywork and  an S&S performance pipe. 29 years later and working in the cnc machining of super bike parts, I decided to build a classic 400 racer exclusively for track riding.  Due to the unavailability of special parts for these motorcycles a whole bunch of parts have emerged. Check out the products page. 


  How does she go ?

Well on maiden outing at the track. First thing was it was way to rich for my altitude and i couldn't get it to rev to it's full potential. The front forks were to hard. this was cured by lowering the oil level from 100mm to 145mm. fixed.

Finally got a selection of jets and some leaner needles. Now it pulls like a train," very strong". Will be updating shortly with some dyno and performance specs as soon as I can.


Click on the link for the story so far with a build spec and photo page.

The racer story so far.


Click on the link for the Yoshimura CB400F build up gallery.

Racer build gallery




Click on the above photo for large view of other side of motor.