Just stepped my son up from a 50 sx to a 65. Tired of throwing money in to the 50 so I moved him up early. I had to install lowering links, drop the triples and shave the seat. I would like to bring the suspension up to par. And resources of where to turn?

 

Start with setting the sag in the rear according to his weight. Then increase the rebound a quarter turn. Watch him ride and take note to If he endow over jumps. Or hops on breaking bumps. Then adjust from there. Front can be adjusted by asking him if it shakes on bumps. The manual gives pretty good guidance.