In the early 1980s several of us in AFM tried to start a new class that would be relatively inexpensive, fun, and encourage the home constructor to try their hand at building a complete bike.
We actually got about 5-7 F150s built, but never more than one or two at the track at the same time, so the class never really got off the ground. There seemed to be a moderate interest in the class, but many people didn't want to take the chance of building a bike and not have a class to run it in - they wanted to wait until everyone else got the class going first.
Perhaps these rules will help you get something similar going in your race club.
There seems to be a need for an inexpensive, safe and technically unfettered class in motorcycle road racing. This class is intended to attract club racers with restricted financial means. We have been inspired by the success of several other car and motorcycle racing classes both in the United States and in Europe. Some examples are Formula Ford, F750 (cars), Formula Bantam, Formula Vee, etc. We have specifically restricted motorcycle engines severely to hold down costs. We have not restricted motorcycle design nearly so much so as to leave room for people's imagination. We intend for these to be real racing motorcycles with limited power.
As a training ground, this should be good for both riders and tuners. It appears that, at this time (1982), one of these motorcycles could be constructed for $1,500 or less.
The engines should have 12 to 15 horse power and the motorcycles should have a top speed of about 100 mph. This should be a good investment and also be fast enough to provide a good learning experience.
If the competition is as keen as Formula Ford or of any of the other classes mentioned, it should provide exciting racing at a minimum cost.
A committee will be formed to administer the Formula. It will consist of 3 or 5 persons. The purpose of this committee is to oversee the Formula and to guide it. A budget will be provided for by a $10 registration fee. The committee will meet once every 60 days.
It will be the job of the committee to publish a GENERAL guide to tuning and construction of these motorcycles. This is not intended to be a design manual, but instead a general guide to keep riders and tuners from making time consuming and expensive mistakes.
This Formula is designed to provide inexpensive, safe and enjoyable racing. The following rules may be changed from time to time to insure that the class stays healthy and the original intent is being followed.
A. If you have a specific inquiry as to the letter of or intent of the Formula 150 rules, please contact the Formula 150 committee*. To avoid disappointment, a written interpretation will be given. Ask before you try to bend the rules. The intent is not to stifle imagination or ingenuity, but to keep costs reasonable and the competition at a fair level.
B. This Formula is designed for the benefit of the amateur rider and tuner with limited resources. The Comittee reserves the right to reject any motorcycle that defeats the spirit of the rules even if it meets the letter of the rules.
C. Penalties: if a motorcycle is found to infringe on these rules, it will lose all accrued championship points up to that time.
© 1996-2013 Michael Moore, last update for this page 24 July 2013
http://www.eurospares.com/f150rule.htm