break-in time

[erickc23]

I just did a top end rebuild. I know I need to go easy at first to break in the new pistons but how easy and for how long? Do I need to mix the fuel richer or the same as always? Is there anything else I sould know?

Thanks for any help!!!

[jbooker82]

Heat cycle it a couple of times. Re torque the cylinder nuts, and head nuts. Take it easy for the first 5 gallons of fuel then ride it like you stole it.

[TwistedSheeRida]

you want to keep the bike revving. dont lug the motor thats the worst thing to do when breaking it in. just keep that throttle blipping in the high rpms (over revving wont hurt it better than lugging) for like 10 mins than just let it sit untill you can put your hand on the head. just do this like idk 5 times the more the better i broke mine in in one night. just went riding like usual except stopped every 15 and took a break.

[Darthwall]

the Clymer manual recomendes mix fuel at like 20:1 or a bit higher for the first couple heat cycles to let everything lube up nice then after that drain the tank and do what your goingto do on what you normally run the high RPM break in is a normal race motor break in to set the rings and seal the top end up if its a drag bike you could do this but if its a play bike break it in slow and always retorque the head and studs just as insuance