01 YZ 125 Top End Job now beginning

[deuscent]

Thanks - what is the proper break-in method?

[MXtras]

Just take it easy on it for the first 3 or 4 thermal cycles. Don't rev it above about 1/2 throttle at first, then not above 3/4 throttle for another thermal cycle.

I fire 'em up for a few seconds, shut it down and look everythnig over - coolant level, tranny fluid, check for leaks. Then I fire it right back up and run it at low speed for maybe five minutes, then shut it down and let it cool completely. Repeat maybe 2 more times.

One thing you don't want to do is to run it hard at first. You also do not want to hold it at a constant RPM nor a high RPM. 3-4 thermal cycles and you are good.

Some guys don't do a thing for break-in but I don't advise that.

Scott

[deuscent]

Thanks Scott!

And thanks to all who contributed during the conflict, battle was won





Seem all good!

I will know more after today's riding session

[FFRacing11x]

Scooter, you do realize this is a 2 stroke engine??? The rings are located by pins in the ring grooves.

[deuscent]

After running and stopping cold about 3 times and increasing rpms, i changed the gear oil and to my surprise it was milky pink

i really was concerned until i figured i must have left water in the cylinder somehow, so i flushed the gearbox a couple times and then ran it for an hour and a half at no more than 3/4 throttle

checked oil again and it was clean