we all know im having some technical problems with my 03 400ex. hopeing its just the timing chain skipped. while im in there i was considering a hot cam stage 1. Is it worth it with only having filter,jetting, and slip on. i dont wanna take any reliability from it either. and if its worth doing, will it just pop in or am i gonna need shims or anything else?

thanks

 

no shims in a 400ex. stage 1 will go right in.