Rebuilt top end on 2005 yfs 200 blaster. Bored 50 over still sounds and feels weak maybe even less powerful. I noticed burn marks on rod in bottom end where rod connects at bottom. Anyway to tell if bottom end needs redone??? Feels slightly weak
those are normal if on the crank journals, not the rod ?
leakdown test, break-in, clean carb, float height, airscrew/pilot adjustment, needle clip position in the middle, main jet plug chops, brass washer under main jet ?
burn mark normal
what is the compression at?
either carb is out of adjustment/low compression/leaking someweres list goes on
it should rev fine sitting still if compression is good and carb is adjusted proper.
perhaps your problem is elsewhere then your cylinder/piston/rings slash pump
Also list any mods that you know of. If any were done but not jetted for, could lead to a weak feeling. Did the exhaust have a rattleing sound in it? Who&how was it determind it needed rebuild?
What other quads/bikes have you ridden? A stock blaster will feel weak. Especially if there is something else wrong such as dragging brakes, bad wheel/axle bearings, over tight/rusty chain, flat tires.