Hello everyone!

I own a 2005 kind quad 700 with vdi copperhead ecu, hmf exhaust, clutch kit, and a few other none performance mods.

I was riding the other day at 70 mph which is pretty close to being throttled out...the fourwheeler all of the sudden slowed down, blew a small puff of smoke, and lost all power for a second I stopped and the fourwheeler shut off...i refired it to find that it would start fine and run fine, but has a small knock to the motor now what could be my problem? rod bearing or piston skirt maybe?

 

sounds like you ran it to hard for to long there check your compression, if that seems good... just gunna have to start tearin her apart to see whats goin on really.