1972 CB350 Valve adjustment

[fairfield]

Trying to adjust the valves on this bike that has been sitting for 25+ years. All four valve covers are off, alternator cover as well. I read the procedure in my Clymer, seems simple enough. In trying to align the LT mark when the engine is at TDC, it keeps wanting to roll over just enough to pass the index mark. Is this normal? if it is, how do you keep it in place while you do the valve adjustment?

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[Gyi2os]

I do mine holding the wrench in one hand with it "Spot on" then try to get my feeler in there with out moving the wrench. Check it not once, but three times (looking back at the wrench to make sure it's in the right spot, slide in feeler, check wrench repeat)

You just need to resist the forward motion and you should be fine... Oh, and i think the manual mentions taking out the spark plugs... i always do. If my understanding is correct, this relieves any pressure in the cyl that would add more 'weight' to the forward motion, making it easier to hold in place.

The R cyl is done the same way, though it's more difficult.

 

[fairfield]

I was able to do just that, should've mentioned it. The left valves are off, 0.002 on the exhaust and lightly touching on the intake. I want to adjust so I would need both hands, and would rather have it fixed instead of someone holding it. I'll try to remove the spark plugs to see if it helps. Anybody ever use C-clamps or something like it?

 

[Gyi2os]

Also, a 6-pack and a friend goes a long way

 

[jmcaya]

Just did this same thing last weekend. Another person really is helpful. I'm a do-it-yourself kind of guy too, so I grew one at home. Took forever, but he's finally getting so he can hold a wrench without dropping it most of the time.

The right piece of rope with the right knot tied from the end of the wrench to the frame or foot peg will do the trick, too.

 

[DrJ]

You can also try putting it in first gear and spin the rear wheel until the crank is lined up. Then hold it steady with your foot.