Well I'm looking at building a new Suzy GP125 bucket race motor hence my interest in other threads on K.B. My existing motor is the same thing developed according to John Robinson's specs in a Performance Bike article from the 70's but not taken as far as him. This was my first attempt at tuning a 2 smoke and all in all was pretty successful. Approx 17hp, rideable and very reliable but I'm under no illusions that it's any where current in terms of design. It was based on 70's technology.
I've recently just got an inkling as to how far behind the times it is..still I came 4th in the Bucket GP. As much due to the fact that several of the faster bikes didn't last.
Quite a lesson in reliability vs. power.
Recent reading as led me to the TSS500GP macine developed by Wayne "Wobbly" Wright. a N.Zer engineer for GRand Prix(unsure as to which teams he's worked for).
The porting pics have intrigued me as has the toroidal head.(only just heard about it-Yeah we all have to learn how much we don't know)
I'm guessing some of this could be applied but thats getting many steps ahead of myself.
I suspect some of the bucket tuners have applied some of this as one 50 cc bike seems to have more power than most 100's or 125's.
Will post origina ltiming specs for GP100 motor that I have laying on the bench when I get them sussed(was planning to strat by boring to 125cc but will hold fire for thr moment).Also in the middle of a house renovation project.
Anyone wants basic 2 stroke answers ..I'll do my best.
Life is a lesson-if I bother to listen
Bookmarks