MM8 - TBParts.com Vintage Z50 vs. CRF50 88cc
in the 88cc class is it a stock head or can you run a race head ?
8” Rear/ Front Wheel Amateur Class - No current AMA Pro license holders allowed. Must be 18 years of age or older as of race date. You must run an 8” Rear Wheel. All bikes must use Air-cooled, 4-stroke engines (maximum 88cc) with Open Cradle Frames.(no Aluminum frame), 2 shocks (or hard tail) on the frame 8” front wheels (maximum) are allowed. Manual Clutches are allowed. Maximum Wheel Base is 42 inches. Both wheels must be solid. NO regular spokes! Practice & qualifying - time TBD
Vintage Z50 88cc
–one addition: No 4 valve heads
– All must use Air-cooled, 4-stroke 88cc engines (no 49cc engines and no engines larger than 88cc) with Open Cradle Frames. 10” Rear wheel and 12” front wheels (maximum) are allowed. Manual Clutches are allowed. Engine Modifications are allowed except no 4 valve cylinder heads
. Maximum Wheel Base is 45 inches.
Any head, but a 4-valve.