I saw this kit searching on here for mods and was wondering does it just swap out or is there other stuff that needs to be done like rejeting or timing or anything else, and how difficult is it to do? I was also wondering about clutch springs would heavier ones add to bottom end power what is there advantage, are they worth doing? As you can tell I'm not engine saveyMy trizinger doesn't seem to want to climb hills unless I'm going full bore up them and unfortunately where we ride is very hilly terrain. Any advice is greatly appriciated
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