Topic: Drive chain install

[Kelloggss]

I am a new owner of the 1978 CB750A with 5800 miles.
 Never had an Automatic and excited to get her on the road. Carb rebuild kits and accelerater pump kit on the way.
The drive chain was broke when I  got it and tied up with tie wrap and still on the front sprocket. My question is what has to be removed to access the front sprocket? So I can inspect and install the new chain that came with the bike.
Don't want to remove more than necessary.

[Kelloggss]

I have the original manual and a shop manual but nothing in there about changing the chain or sprockets, will look at the original manual again..

[7T1Burb]

There is a front sprocket cover that can be removed by removing the JIS Philip Head Screws that secures the cover.  Once off you can see the front sprocket (15 Tooth) and inspect as you desire.

The original 1977/1978 630/88 drive chain was an "endless chain" (no Master Link).  To install this type of chain you've got to remove the rear wheel and swingarm as this type of chain loops over/under the swingarm so this disassembly is required. 

If you've got a 630/88 chain with a Master Link you can "snake" the new chain around the front sprocket then over and under the swingarm on its' way to the rear sprocket (42 Tooth).  Be aware that the Master Link on this type of chain is directional specific and must be installed correctly.

Hope this helps!

[Kelloggss]

That's the info I need. I found the 2 screws and removed the cover. The bike came with an endless chain just as you described. I will weight the time to either remove the swingarm or break chain and use a master link. I think time wise would be the same and I don't have a chain rivet tool. Will be a good time to clean, and grease swingarm etc.