Vacuum advance diaphragm replacement


Information and questions on GL1100 Goldwings (1980-1983)
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Newport
Posts: 81
Joined: Tue Mar 15, 2011 4:46 am
Location: Newport, Victoria, Australia
Motorcycle: 1983A Aspencade
2012 Triumph Tiger XC
Contact:

Vacuum advance diaphragm replacement

Postby Newport » Fri Mar 04, 2016 6:40 pm



I have seen many posts about failed diaphragms in vacuum advance actuators and resulting repair attempts.
I recently removed the actuator from my bike (83 GL1100A) and sent it to Advanced Diaphragm Options in Queensland Australia.
They opened it up, fitted a new diaphragm and returned it looking and performing like new for $75 Aussie dollars (plus postage)
Just google the business and you will get all contacts if interested.
I offer this information as I seem to recall posts where owners were unable to find a repairer.
I am very pleased with the result and checked the advance curve using a timing wheel bolted to L/H Camshaft pulley.
As you will all know it is a bit of a task getting to that part on the bike.
In my case I believe the effort was well worth it.



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Johnyy Smoke
Posts: 599
Joined: Sat Nov 26, 2011 6:44 am
Location: Se Minnesota
Motorcycle: 1980 GL1100
Vetter. "Its like Deja Vu all over again".

Re: Vacuum advance diaphragm replacement

Postby Johnyy Smoke » Sat Mar 05, 2016 4:52 am

A little more info on how you checked the curve would be interesting, I assume you used a timing light. Regards, Johnny

Newport
Posts: 81
Joined: Tue Mar 15, 2011 4:46 am
Location: Newport, Victoria, Australia
Motorcycle: 1983A Aspencade
2012 Triumph Tiger XC
Contact:

Re: Vacuum advance diaphragm replacement

Postby Newport » Sat Mar 05, 2016 6:26 am

Johnny:
I checked the timing using a timing light and used the L/H camshaft pulley as my reference point after placing relevant markings on it.
Much easier and more accurate that trying to read crankshaft even if you have the little inspection window set up
I made up a timing wheel from http://www.blocklayer.com/degree-wheel.aspx and adhered it to an old CD which I bolted to the camshaft.
Sorry now that I did not take photos but do have one of the timing wheel.
Let me know if you need more info.
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