After the restoration: Engine Teardown [page 19]
Tuesday, Aug 3, 2010 [19326 miles]
Parts for the right side
Remove tape residue
I grabbed the parts for the right side top end after perusing old pictures to see which cylinder went on the right side; necessitated by painting over my R and L markers. The cylinder with a repaired fin goes on the right. I removed the masking tape and used some alcohol to get rid of all the tape residue.
A bit tight
Filed
Down a bit
Just right
The new rings were a touch tight. A few strokes of the file got them to their 0.25 mm (tested here with a 0.20 and a 0.05 blade) minimum.
Fail!
And that’s when work stopped. I ordered some piston pin clips about a dozen years ago and threw them in a drawer. I knew I had them so didn’t bother ordering new ones this go-around. Fail. I don’t know what these clips are for but they sure as hell won’t fit in my pistons. I’ll scrounge up some clips tomorrow, and hopefully get the top end back together Thursday.
Thursday, Aug 5, 2010 [19326 miles]
Piston mods
Checking ring clearance
Yesterday I picked up a needed circlip from Brent and, while I was there, used his scale to check pistons. Hmmm, one was about 1.7 grams heavier than the other. He loaned me his dremel and I removed excess metal from the inside of the piston until they were the same weight. Today I washed and blew dry the piston, then started measuring ring clearance. OK.
Almost there
Ready for rings
Top toward the crown
All three rings
I inserted one clip, heated the piston, and pushed the piston pin into place using a wooden drift while holding the piston with a rag in a gloved hand. While it was cooling I looked for the piston ring expander tool I used not that long ago. Couldn’t find it so once the piston cooled installed the rings using my fingers. Just as easy, anyway. The other circlip was installed before the rings.
Cylinder hone time
Honed and washed
Push rod tubes
That’s a new ball hone, pictured. I oiled the hone then gave the cylinder about 10 seconds of slow swipes then another 5 seconds or so of fast swipes. I washed the cylinder in hot water using a brush and some simple green, then dried it and applied some WD-40 to stop it from flash rusting. The marks seen in the second image look much worse than they actually are. They can not be felt using the finger nail test.
Gooped gasket
Lifters in right side
Silicone grease
I gooped up the cylinder gasket, slobbered assembly lube all over the lifters, and installed both on the bike. The pushrod seals got a coating of silicone grease to make pushrod tube assembly a bit easier.
More pain than worth
Cylinder installed
Cylinder base nuts
The piston ring compressor is more pain than it is worth. I removed it and used my fingers to compress the rings one at a time as I installed the cylinder. It was easier that way.
Left cylinder
Ring gaps
Honed, ready for wash
Time to work on the left side. I removed the masking tape, cleaned off the tape residue, checked the ring gaps (only the oil scraper needed adjustment) and honed the cylinder. The picture is after honing, before washing. I washed, dried, and gave the cylinder the same WD-40 rub down that I did for the cylinder on the right side.
Left piston installed
Gooped up lifters
Gaskets
Special tool
The left cylinder went on the bike the same as the right. It was about this time that the contractors putting in a new door between garage and kitchen needed my attention so I buttoned up the bike for the day. Tomorrow, the heads should get installed.
