machinehead
Active VIP Member
Oil is pumping out breather into airbox. ( alot , filled box with a half liter of oil in a short period )
Compression test shows 90 psi, after a teaspoon of oil dropped in chamber, compression reads 120 psi.
Correct amount of oil in motor.
I suspect worn rings, with blow by pressureing up the crank case.
What do you guys think.
Time to tear into top-end ?
Would you just re-ring if the piston looks good, or is it worth the extra for new piston and wrist pin ?
I beleive this was the first year of the R model, and haven't had a great deal of experience with them.
Compression test shows 90 psi, after a teaspoon of oil dropped in chamber, compression reads 120 psi.
Correct amount of oil in motor.
I suspect worn rings, with blow by pressureing up the crank case.
What do you guys think.
Time to tear into top-end ?
Would you just re-ring if the piston looks good, or is it worth the extra for new piston and wrist pin ?
I beleive this was the first year of the R model, and haven't had a great deal of experience with them.