woody, what i was sayin was i would fit a ty mono engine , but on the other hand a rev3 motor looks more promising.
if you want to keep twin shock pure ,keep the bikes pure and keep the sections to a standard where you dont have butt clenching drops, up your own butt turns, and butt breaking rocks, and steps , or the twin shock class nationals class will go the same way as the pre 75 class , only ridden regulary by 2 or 3 riders on very trick and i know very wallet breaking machines . the other problem with the classic series is that the clerks of the course have to accomodate a very good class of over 40 on modern machines ,may be now a second easier route for pre 75 and twin shocks , still hard enough to take 1 or 2 marks off the winner but but not so hard that other riders go home thinking sod that not doing another one of those.
just returned from belgium classic ,fantastic sections ,four routes per section ,long ,long sections .
ACU PLEASE NOTE GO TO BELGIUM AND FIND OUT HOW ITS DONE PROPERLY