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Got the bike back today.. after all that work... rehone.. valves all redone again with seals, guides., and lapped...
STILL SMOKING.. At first it seemed better.. hardly any smoke at all.. after about 20 miles it started getting a lot of smoke.. perhaps worse than before.
There is no loss of...
So I picked up the head from the machine shop today. The guy was really good and went through everything.. took it right down to the bare bones, cleaned up all the valves.. pressure tested everything, put new seals in, lapped the valves and put it all back together. Also they honed the cylinder...
So this is what I think happened. Im sure you are all familiar with piston rings and how they are like a giant c-clip. There is a quarter inch slot that is open in the ring (they are obviously not solid all the way around). I think the guy installed them on that number four with all the slots...
Just spoke to the shop today. I guess when they first pulled that piston out it was COVERED in WET OIL. I will be going down there today with a friend that is a Harley mechanic to look at it for a second opinion. This shop has been a nightmare ALL SUMMER. Stay away from them!
yes I changed the oil several times.. and tried different types of oil.
Was always filled just about half between the marks
The last time i changed it, i left it on the lower side.. just to rule that out as a problem
Yes prior to the rebuild.. besides a BAD cam chain and low compression... it ran strong with no smoke what-so-ever. The smoke was a bi-product of the rebuild.
Also when i start to get the heavy breather smoke, If i open the oil dip stick smoke will come out also..
But as far as the breather tube.. think of a two-stroke scooter exhaust and that's about how much I am seeing come out... and also from the right side exhaust pipe. It is blue-white...
After a highway ride (30-40 miles) Ill pull off the highway and stop at a red light and the bike will stall out and have trouble starting again.. at this point there is a TON of burning oil coming out of the crank case vent. I am positive is is oil and not vapor.
Hi all, new here from RI
I picked up an all original 72 cb350f a back in march with 40k miles. Had a local shop here rebuild the top end and crack the cases.. rings.. cam chain...valves.. carb rebuild.. fresh plugs.. wires..coils..and electrical.. brakes.. cables.. new everything.. really went...
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