what's the best way to break in a fresh bore and top end.
how long of intervals and how many times should it be done
Also, according to the lt250r manual:
- less then 1/2 throttle for up to 10 hrs
- Do not maintain constant engine speed for an extended time period during any portion of the break-in. Try to vary the throttle position.
So maybe letting it idle for a long time is not the best idea?
Also, according to the lt250r manual:
- less then 1/2 throttle for up to 10 hrs
- Do not maintain constant engine speed for an extended time period during any portion of the break-in. Try to vary the throttle position.
So maybe letting it idle for a long time is not the best idea?
No not a good idea.
Less than half throttle for up to 10 hrs?!? I might do one heat cycle if it's running good. Then it's WFO!
Here is what Jerry Hall said about it in another post on here.
Just go ride it.
The piston needs more heat than what idling can provide to stress relieve it. The proper break-in procedure will relieve the needed stresses and polish off the high spots on the piston and cylinder wall at the same time.
The heat cycle routine of letting the engine idle for ________ minutes with _________ minutes of cool off time and repeating the process ______ number of times, then run the engine at_________throttle position for __________ minutes........it just goes on and on and on........ just polishes the tops off of the cross hatch, glazes the cylinder and make ring seating take longer without doing much to aid the break-in process of the piston. I have read and tried numerous break-in procedures in my career. The above procedure is another one of those procedures that really does not hurt the engine but it does almost nothing to prepare or break-in the piston so that the engine is ready to be run hard.
When I have time I will post my procedure and the science behind the procedure.
when it idles it does not give motor enough oil to lube it.
and that 10hr break in is for oe piston,(cast) plus oils we have now are better, compared to back then.
i did heat cycles 110 first then 125, you keep reving the motor, the entire time. dont let it just idle.
then i rode it around after that, just keep it under full thrtl,
this is my $.02 tho, take it how you want to. everyone has there own way. i used to have a friend that was a pro rider
when his dad would put new piston in his bike, josh would start it and ride it to the starting line. no break in for his stuff
it was done on the track.
I heard similar stories of factory riders just starting them up, cruising for a bit then hammer time. Was told if it's gonna blow up it would have already....
