Formula CB, a spec class for near stock Honda CB350, CL350 and CB360 Twins. The purpose of Formula CB is to provide a entry level class for new riders and a low-intensity and economical class for any rider. To meet these goals the class is intended for basically stock bikes. Anyone who disregards the spirit of rules for this class will be asked to move to LWSV. With the creation of this class, Honda CB350's will no longer eligible for Period 1 - 350GP, but can participate in Formula CB and Lightweight Supervintage. All Formula CB races may be run with the 350GP. All currently legal CB's running in 350GP will be legal for Formula CB.

1. Stock Engines with 5% overbore limit. No internal modifications.
2. External gearing changes, sprockets and counter-sprockets, are permitted
3. Drum brakes required. May use aftermarket brake shoe linings, including but not limited to appropriate racing compounds are permitted.
4. Stock Carburetors are required and shall not be overbored, Air boxes may be removed or modified, aftermarket air filters are permitted.
5. Exhaust system may be changed. Aftermarket exhaust systems and silencers are permitted.
6. Cam chain tensioners may be updated.
7. Electronic ignitions are allowed.
8. Clip-ons, aftermarket handlebars such as clubman, straight bars or dragbars are permitted.
9. All street equipment such as turn indicators, headlight, taillight, side-stand and kick stand shall be removed.
10. Stock frames and swingarms only. Aftermarket steering head bearings and swing-arm bushings are permitted.
11. 35mm maximum fork tube diameter
12. The motorcycle shall otherwise be 'stock'. Any modifications not specifically listed above shall not be permitted.

Table of Contents (click on any item to view that page)
UPDATED 2005 / 2006 RULEBOOK!
Names and Addresses
Class Overview
Bumping
Championship Points
General Rules
Formula CB350
American Twins
Endurance Racing