Spokes
Veteran Member
I'm a bit concerned with the oil dripping from the exhaust at the head and muffler joint. I suspect the valve seats. I reused the cylinder head from the original engine, which by the way, was disassembled in 1966. I cleaned up the head, installed new valve guides, reemed the valve guides to spec to accept the new valves. Possible mistake? I lapped in the new valve to the uncut seats. I followed advice to fill the piston dome (when the head was upside-down) with light solvent (isopropanol alcohol) and check for leaks. No leaks.
The cylinders were rebored to .75 over size and proper rings installed and ring gaps staggered 10 O'clock, 3 O'clock and 6 O'clock, I assume all is well with the rings. I measured the exhaust ports and fit new copper crush gaskets hoping to seal the exhaust, to no avail.
So, the bike starts fast and blows oil. After she warms up and at idle, no smoke from exhaust. Quick throttle up and oil blows from the exhaust flange and at the muffler/exhaust joint (aftermarket mufflers) Aftermarket mufflers are bogus mufflers. No internal baffles! Straight through! No backpressure.
Unlike past builds, like the CA95 I built from scratch back in 2012, this build was a bit more challenging. One reason is the bike is an early 1962, but the other concern today is the lack of serviceable parts and often unreliable replacement parts.


I still love to tinker with this old dream and, believe or not. enjoy the continued journey to solve issues while sharing my experience with this forum.
The cylinders were rebored to .75 over size and proper rings installed and ring gaps staggered 10 O'clock, 3 O'clock and 6 O'clock, I assume all is well with the rings. I measured the exhaust ports and fit new copper crush gaskets hoping to seal the exhaust, to no avail.
So, the bike starts fast and blows oil. After she warms up and at idle, no smoke from exhaust. Quick throttle up and oil blows from the exhaust flange and at the muffler/exhaust joint (aftermarket mufflers) Aftermarket mufflers are bogus mufflers. No internal baffles! Straight through! No backpressure.
Unlike past builds, like the CA95 I built from scratch back in 2012, this build was a bit more challenging. One reason is the bike is an early 1962, but the other concern today is the lack of serviceable parts and often unreliable replacement parts.



I still love to tinker with this old dream and, believe or not. enjoy the continued journey to solve issues while sharing my experience with this forum.
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