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Honda CB750 Compression Test & Motorcycle Clutch Adjustment | Honda Cafe Racer Project Bike | 03
In this Honda CB750 Cafe Racer project episode, I am checking some of the issues I found during the first start of my new Honda Cafe Racer build.
Decent budget compression tester: ebay.us/VHtsJz
When I first started this bike, it seemed to have an oil leak from the head gasket, it also seemed to have quite an exhaust leak. I also noticed that the gear change didn’t seem to be engaging the gears correctly.
I decided to compression test the engine using my compression tester. It is quite easy to use and gives a good indication of how healthy each cylinder is. I found that the pressures seemed quite low. If I hadn’t noticed the oil leak I may have thought about giving the engine a few heat cycles to see if they improved. Sometimes when an engine hasn’t been run for a long time the rings and valves need to settle in a bit. But I am intending to have the head off the bike anyway so this isn’t the way I will try to address it.
I also took a look at the gear change. It has a set of rear-set pegs, so I wondered if the linkage was causing the problem. They seemed to be OK, so I turned my attention to the clutch. I could see that the clutch push rod adjuster was quite far in, so I reset it. This did the trick and the gears seem to select fine now. That should save me a gearbox, clutch strip-down :)
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