Timing Belt Tension


Information and questions on GL1000 Goldwings (1975-1979)
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Fewman
Posts: 38
Joined: Wed Sep 29, 2010 7:57 pm
Location: Drake, CO
Motorcycle: '75 GL1000

Timing Belt Tension

Post by Fewman »



Curious, anyone ever actually measure the belt tension after performing the tension setting procedure?


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Fred Camper
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Joined: Sun Aug 16, 2009 9:15 pm
Location: Metro Detroit, MI
Motorcycle: 1977 GL1000, 1976 LTD GL1000

Re: Timing Belt Tension

Post by Fred Camper »

Not me, they seem pretty darn tight however. They do just fine for 5 years of age, so I would not mess with the formula.
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dingdong
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Motorcycle: 1976 gl1000
1993 gl1500A
2004 NRX1800 Rune SOLD

Re: Timing Belt Tension

Post by dingdong »

Yes! You really need to do a measurement. Recommended is 1/4 inch each direction. Too tight can cause the idlers to fail and too loose can cause the belts to wear and the cam timing to vary if they are really loose.
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Fewman
Posts: 38
Joined: Wed Sep 29, 2010 7:57 pm
Location: Drake, CO
Motorcycle: '75 GL1000

Re: Timing Belt Tension

Post by Fewman »

I just bought a NOS timing belt tension gage cheap ;) and I'm going to experiment with it. I know there is no OEM spec on actual "measured" tension but I intend on finding an 'average' tension and see if it cures the noise :( I hear.

I bought my GL new and for years I never heard a peep from the belts until I started replacing them. I have carefully set belt tension and I still have this minor "belt whine" at around 1000-1500rpm (coming down after a throttle blip; engine hot). I've replaced rollers (2 different sets), new tension springs, cleaned up the backing plates, new belts, etc., and it's still there ( :( whine). I'm thinking that because of the different 'pull' on each of the two belts from the valve train while adjusting just might be a clue...

I am not worried about throwing a belt or anything serious (1000's of us guys have been replacing these belts using the factory procedure) but the gage was cheap and it's winter here in the Rockies and I like tinkering with the GL... ;)
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User avatar
Fred Camper
Posts: 1339
Joined: Sun Aug 16, 2009 9:15 pm
Location: Metro Detroit, MI
Motorcycle: 1977 GL1000, 1976 LTD GL1000

Re: Timing Belt Tension

Post by Fred Camper »

Be sure to share with us your findings. It would be good to know the tension of 1/4 inch.


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