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If you don't want to break the cam chain apart, you can still disassemble the top end. Remove the cam covers and slide off the bearings from the camshaft and you can then have enough slack in the cam chain to remove the cam from the head.

One thing I would suggest is you make sure you remove all the case bolts and nuts before you try prying the cases apart. There is one nut holding the crankcases together inside the clutch cover.

Well done, Jim. Great thread.

I worked as a tech in 1973 at a Yamaha dealer, The first year TX750, the copper color were a nice looking bike and were expected to sell well. They initially sold fair, but not as good as the left over XS2 650s ($1200.00) out the door. They had a lot of problems with the oil seal behind the...

Remove the round chrome cover that is above the spark plug on the left side of the engine and see if there are ignition points inside.

Has the engine been converted to points ignition?

I also have a 65 CB77 apart in my basement. Looks like yours with the frame on the bench and the engine together on the floor. Mine was originally a white one, but the previous owner sprayed it avacado green, without masking or removing anything. Got to love those old hippies. A few years ago...

To save your fuse budget. Remove the fuse that blows and replace it with a light bulb. The bulb will light when a short is present. When you locate the short the light will go out. Repair the short and then swap the light bulb for the original fuse.

You won't have my help talking you out of buying a SR500. I have had mine from new 1980 and it is probably the last motorcycle I will release my grip on when I get old. I only have 36,000 miles on it and the engine has never been apart. It is a very nice companion to my two XS650s. I have...

I used the hair dryer on a low to medium heat setting.

I would go with the hair dryer. I derusted a tank using a POR15 kit and they recommended using a hair dryer and it worked for me.

Very nice. What is the name of the supplier? I need a new muffler for my SR500.

Variety is the spice of life. Good on him to be riding in the winter.

That looks like the gear in the bottom case that drives the crank from the electric starter. Sorry, I didn't see the question was already answered.

If your bars are original that plug may be original equipment. Yamaha installed them in the 650 handlebars. Not sure if all years had them.

David Aldana, a great racer, just was acting his age in those days. Now, he has a few regrets from those days according to some articles.

Good for you giving your ride some exercise.

I drained and removed the gas tanks from both of my 77 Standard and 80 Special II. I keep them in the warm basement so I don't drop snow shovels on them over the winter. Also, keeps them from forming rust inside from condensation.

Well, maybe for the shiny rides. I had a call today from a old friend asking if we should make a set of ice tires for ride on the lake.

That looks like a Special frame. The rear muffler, footpeg mount is a loop on the Standard model.