'77 GW valve adjust problems


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vinsil1
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Joined: Tue Jan 29, 2013 1:33 pm
Location: Riverside, California
Motorcycle: 1976 GL1000

'77 GW valve adjust problems

Postby vinsil1 » Sat Jun 01, 2013 8:04 am



I am rebuilding a '77 GW that sat idle for 7 years and had very poor maintenance. After installing new belts I moved on to adjusting the valves. I can't seem to get the intake and exhaust on either no. 1 or no. 2 to be loose when I am at T-1, so adjusting them is not possible. If the timing wheel is at the two hash marks that are by themselves then the intake and exhaust on no. 1 are both loose. It's driving me nuts! Any help would be appreciated.



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WingAdmin
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Re: '77 GW valve adjust problems

Postby WingAdmin » Sat Jun 01, 2013 10:09 am

vinsil1 wrote:I am rebuilding a '77 GW that sat idle for 7 years and had very poor maintenance. After installing new belts I moved on to adjusting the valves. I can't seem to get the intake and exhaust on either no. 1 or no. 2 to be loose when I am at T-1, so adjusting them is not possible. If the timing wheel is at the two hash marks that are by themselves then the intake and exhaust on no. 1 are both loose. It's driving me nuts! Any help would be appreciated.


Remember the valvetrain turns at one half the speed of the crank. Two of the valves will be loose, the other will not. Rotate the engine one full rotation to the T-1 mark again, and the other two valves should come loose.

vinsil1
Posts: 7
Joined: Tue Jan 29, 2013 1:33 pm
Location: Riverside, California
Motorcycle: 1976 GL1000

Re: '77 GW valve adjust problems

Postby vinsil1 » Sat Jun 01, 2013 10:20 am

I will try it again. Thanks.

vinsil1
Posts: 7
Joined: Tue Jan 29, 2013 1:33 pm
Location: Riverside, California
Motorcycle: 1976 GL1000

Re: '77 GW valve adjust problems

Postby vinsil1 » Sat Jun 01, 2013 2:59 pm

Once again, when I align the T-1 mark I never have both valves on either 1 or 2 loose at the same time. It doesn't matter how many times I turn the engine. It is always one valve loose and one tight on each of them. However, when I continue to rotate the engine and align the next two marks that are by themselves I get both valves loose on no. 1, both valves tight on no. 2, exhaust valve loose on no. 3 and the intake valve loose on no. 4. Just like it is supposed to be! Do I have a different timing wheel than everyone else? Is my TDC in a different location on the wheel? I have never seen this, hopefully someone else has. Thanks.

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WingAdmin
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Re: '77 GW valve adjust problems

Postby WingAdmin » Sat Jun 01, 2013 4:01 pm

When the engine is at the T-1 mark, only cylinder one is at top dead center. The other pistons will be in various parts of their cycle.

You should check these valves first:

1: Intake
1: Exhaust
3: Exhaust
4: Intake

Then rotate the engine another 360 degrees back to the T-1 mark. Cylinder 2 will now be at TDC. Now you check these valves:

2: Intake
2: Exhaust
3: Intake
4: Exhaust

vinsil1
Posts: 7
Joined: Tue Jan 29, 2013 1:33 pm
Location: Riverside, California
Motorcycle: 1976 GL1000

Re: '77 GW valve adjust problems

Postby vinsil1 » Sat Jun 01, 2013 5:10 pm

It was the belt. Whoever installed it did it incorrectly. I should have checked it long ago instead of assuming it was ok. Thanks for helping a dumb ****.




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