I slacked off big time myself. I had supertib mod a picco p3 for my MGT .21. I should have been running but man did it get hot here! I would be carful with the extra power I never had a tranny problem until I dropped a .28 into mine this was before tib’s modding. The extra power brought to light the flaws of the tranny. I don’t know for sure if it was the weight or the little bit of play from the forward / reverse. However I blew out three one way hubs never any gears as other have said. I bought a new 8.0 tranny on ebay set it up for forward only. Broke in the modded picco and the 8.0 tranny is still running strong. I know the reverse is very appealing but easy to live without.

I bought a used MGT 4.6 the .28 would pull a wheelie quit nice