1980 Honda CB750F DOHC Scheduled Maintenance: Valve Clearance, Cam Chain, Timing, Carb Sync, & Drive

In this video I do the routine scheduled maintenance as recommended by the Honda factory service manual. I am working on a motor that has just been broken in over 500 miles, but this is the same maintenance that would be done at 4000 mile intervals.

To skip ahead:
Valve adjustment 05:40
Cam chain 19:25
Timing 23:39
Carb sync 29:22
Oil chat 34:21 - I edited out my explanation of the viscosity rating because I had it all wrong. That's what you get from relying on memory. Check the link posted in the comments about how to interpret the "20w-50" rating on the oil jug. The advice still applies: heavier oil in a hotter climate. These old motors prefer it, and we have the benefit of 40 years of data backing up this choice.
Drive/chain slack 39:20

This is my first instructional video. I tried to fill a gap in the available information as I saw it when I was building this bike. I also wanted to provide some holistic thinking practices for working on motorcycles in general.

There is much that I'm sure I left out, and different DIYers will litigate the methodology differently; what I know for certain is that this methodology has worked for me up until this point. For example, the position of the motor when measuring the valve clearances is described differently in the FSM than it is in this video and by other folks online. The proof is in the ride! Always gather information from multiple sources before attempting your own maintenance.

There are other procedures you can do at the same time you're doing the 4000mi checkup: lube all cables, bleed the brakes, etc. I did not cover these here because my bike is still fresh and I wanted specifically to focus on the engine.

There are some special tools needed to do this at home, but a small investment in the near term will save you loads of money in the long term. I am not a capitalist, so links will not be provided. I'm sure you can figure out how to order these online:

- Feeler gauges (in thousandths of an inch)
- MotionPro shim removal tool
- Timing light
- MotionPro carb sync screw adjustment tool
- Carb synchronizer (manometer) - a rough version can be made with hardware store supplies; I didn't have the guts to do it and preferred the dial gauges.

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