is running a piston ring in the same as a whole top end???

just fitted a new ring as i have done almost 4000 miles on my pm 70 ring so replaced it ...but what is the process of running a piston ring in

 

pm kits are alloy

just do a few heat cycles

 

fort that was how but wasnt sure

thanks tom

 

just dont wrag it for a while...it'l be fine

 

i will do 2 15 mile rides at half throttle cool down between each one then a 20 mile run at 3/4-full throttle run and cool down and that should be fine shouldnt it

 

Is it a good idea to sand the outside of new rings a bit before fitting?

 

why?

 

Im asking lol i was told it was was a good thing to do

 

awww well too late now lol ...it runs ok anyway ..they must of been on there last legs because there is way more compression now

 

ive never heard of sanding the rings but i had heard of doing that to the barrel to bust the glaze as it helps new rings bed in

 

agree on that one....

as for sanding the rings..they need to wear to the microscopic differences in the sides of the bore, thats why when you run them up to temp and cool down repeatedly the most wear of an engine occurs when its cold and things havent expanded to their running tolerances...hence they bed in. Its not good practice to thrash any engine til warmed up properly