CL77 smokes after rebuild

[pwdavis45]

I just finished a rebuild on my cl77 with .5 over pistons and new rings with a re-bore and honing. Engine started smoking (white out the exhaust) after warm up mainly from the right jug. I pulled a compression test after about a 30 minute engine run and the right cylinder was at 90 psi and the left at 120. I did the old oil in the cylinder test and both sides came up to 150. I feel I did everything right and measured and corrected the ring gap according to the instructions. Also positioning the ring gaps the right way and with the right side up. Am I not waiting long enough for the rings to seat? What else could be wrong. Need help...Thanks.

[rustywrench]

Seems you did it right but need to let the rings seat. If your carbs are adjusted for running, drive it for a few miles and don't hold a constant RPM for long periods. You should be just fine. Rusty

[pwdavis45]

Thanks Rusty...will give it a try.

[SWARDLAW]

I have a CA78 1969 that I've restored and it took about 200 miles before the rings finally seated and now it's a completely different motor. The slight smoke and lack of power had me worried at first. Good luck and enjoy.