Predator 420cc 20-25hp

#1
I got a few questions..

are the exhaust the same size for the 420cc vs the 212cc? I doubt it, but I recently purchased candy cane header stage 3 for my 212cc, but realized I'm not going to put that on my kart I'm going to put that on my doodlebug and put the 420cc on my kart.. If i drill the holes out a little more will it fit the 420cc?

Also wondering what a mod list would look like to get 20-25hp out of the 420cc clone, Thanks a lot :pimp:

also does the 420cc need a battery for the electric start?

what would be a good clutch for the 1" shaft?
 
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