Honda305.com Forum

After riding this old rag with her oil leaks and such, and now that I have my second cl road worthy; it is now time to give restoration a try. So here goes. Now I've torn her down to a heap of parts.

The first thing I found in this engine had 4mm over pistons. 350 kit maybe? Then I noticed that the case was not sealed with hondabond but a rtv sealer which explains the oil leaking from the front seams.

When I got to the trans. I found a gear with a missing tooth, a badly worn bushing and a k/s pawl nearly worn through to the point that I'm surprised it even worked. A closer exam revealed the gears were x-ed so I was riding an x-geared bike and didn't know it. This learning thing can be fun.

So here we go with a whole lot of time and money and in 6 mo. to a year I hope to get her Back to a pretty bike again. It won;t be as nice as Davomoto's but it will be one I'll be proud to ride to town. Here some pics the way it was. RW

Do you have a shot of the piston crowns? They appear to be worn 64mm pistons which means 350 kit.

I'd like to see a pic of the crowns as well! I recently tore down a CL72 engine that had 64mm pistons, They were actually 64.25mm .25 over CB350 pstons. The liner was so thin, it had a crack in it, and the front of the cylinder was packed with some sort of epoxy to keep the oil in the motor!

davomoto

Here is a pic of the piston.
If this is a 350, is it safe to assume they did a mod on the valves to make room? No matter as I will most likely use a different head but would like to know what to look for on the other.
BTW-- The caliper doesn't seem to be all that accurate so the 63.79 may not mean much.
RW

That piston looks to me like it was made (or modified) to work with a stock or almost stock head. Does the bottom surface of the head look stock or has the recess been machined to a larger than stock diameter?

Valves are probably stock. If that crown is not taller than stock in the valve pockets, the valves will clear it.

We used CB350 pistons for years and machined huge amounts off the barrels and head to raise compression and that cause valve to piston interference. Your barrels may be stock height or they may have been machined shorter.

On closer examination, the head shows no sign of milling deeper and valves are the same as another stock head so I may very well rebuild this one although the valve train was a bit noisy.
On to more pressing issues for now. RW

It's been a while and a lot of things have been happening and all good. I've been making progress slowly but surely.
First: The trans. I found had some more issues with third gear not engaging enough. To solve that I found a shift fork with more meat on that side and that helped. Then I decided to use an offset cotter to move the gear a bit closer. Good enough for Honda, good enough for me. Long story longer; I put together a very tight and sound transmission. I sure hope I don't have to eat those words one day.
Second: The stop light switch holder was bent to the frame and when I tried to straighten it , the circle became an oval and then broke off. I managed to re-manufacture one with a heavy washer in just the right position.
Third: All the bolt holes for the foot pegs/ side stand were stripped or nearly stripped. So I had to
fix them and that took some doing.
1: roll out the wire feed and fill the hole.
2: mount bar with remaining bolts and center punch a new location for hole.
3: Drill and tap a new thread.
4: repeat first three steps three more times
Soon this frame and frame parts go to the sand blaster and prepped for paint. In the mean time the tank is at a friends getting some dents removed in prep for paint.
So onwards and upwards. More fun in the weeks ahead. Later,,,,,,,,,,,,,,,,,,,,,,,,RW