Bikes Blues and Barbecue is approaching quickly and I really want this CM ready for Misty to ride. The process has been slowed a bit by parts. Been waiting on chain, and coils mostly. But in the mean time I’ve made some progress. I got the tank fitted and all plumbed.
First I welded the stock petcock bung up…It wasn’t in a good place.
There are an infinite number of ways to mount/ make a petcock. For this build, I got fairly legit and bought a new petcock. I then got a deep nut (car lug, specifically) of the same threading and cut it to the right length. Then drilled the new hole where I wanted it, and welded the make-shift “bung” in place.
In the end I’m left with this!
I love the weird location, up front and on the right side. Very uncommon. The tank is off right now getting cooked to remove all the paint/ impurities from the metal. Then i can decide on paint vs raw vs something ELSE!
The frame on this little bike goes only a few inches behind the carb, cutting off the intake from using any normal pod filter. Even the 45 degree angled one I got wasn’t even close to clearing it. So I had to cut a piece out of the stamped frame. And had to get creative to keep the integrity. So I did this.
Works for me! Also got the exhaust on, and all the controls hooked up aside from the brake. Need to get a proper length brake line and rebuild the caliper first.
Well, she is coming together. Still have to wire, get the tank properly mounted, finish mounting the seat so I can upholster it, lots of little things.
Okay so I’ve done a bit of work to this little thing. I reassembled the engine with the new valves (lapped), and valve seals. And cleaned it all up.
Then I stuck the engine back in. And started the front end swap. This was quite a challenge! This is me cleaning and shortening the forks…they don’t need 10″ of travel anymore! I took them down to about 4″ and I still can’t bottom them out on the bike.
Then it was time to fab the seat loop and pan. As well as test out some gas tank swap ideas. I ended up going with this one.
Then I chopped and welded the tiny little loop on.
And here I’ve shaped the seat pan. Now I have to attach it, foam it, and upholster.
New tires should be in sooooooooon!
Picked this little dude up for cheap, not running of course. BUT ONLY 5k ORIGINAL MILES! So what’s the worst it could be?!?
I figured I’d just clean the carb (which was actually NEW) adjust the valves and she’d fire right up. I couldn’t get it to run on the right cylinder for the life of me. Had good spark, new plug, and a single carb feeding both cylinders…So what gives!
I adjusted the valves and the right side ones were insanely loose….hmmmm
So I pull the plugs and check compression. Left side fiercely sucked my thumb in and then pushed it out of the plug hole, right side…? Nothing. Damn.
Also damn, you have to pull the motor to pull the head on this bike! Dumb.
It was easy enough. At this point I pretty much knew it would a bent valve. With such low miles and the fact it had ZERO compression, that’s about the only option. So I popped it all apart and found this.
See that light shining around the valve. That’s NOT ALLOWED! Turns out both valves on the right side were massively bent. Only possible explanation is someone didn’t understand what “redline” meant.
I soda blasted the head.
Then I ordered new valves and they came in quite quickly! I gave them all a good lapping, including the running side.
Here is a before and after on the NON-bent valve seat. After just 5k miles!
Can you see the difference? Note the grey ring around the hole in the second one. That’s what you want. this thing is going to run better than it did brand new when I get it back together.
Still waiting on the valve seals, and head gasket before I can reassemble.
Any day now.