cylinder heads


Technical information and Q&A applicable to all years and models of Goldwings
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jbombyk
Posts: 2
Joined: Wed Apr 20, 2011 7:17 am
Location: Carsonville Michigan
Motorcycle: 1981 gl1100

cylinder heads

Postby jbombyk » Wed Aug 10, 2011 12:00 pm



Are the head on aGl100 and a GL1100 interchangable?



Old Fogey
Posts: 724
Joined: Fri Oct 30, 2009 2:09 am
Location: Glasgow Scotland
Motorcycle: 1976 GL1000
1979 GL1000
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Re: cylinder heads

Postby Old Fogey » Wed Aug 10, 2011 7:42 pm

Not from a GL100!
GL1000 and 1100 right hand heads are interchangeable. The left hand heads are also but with the proviso that the 1000 has the rear of it machined for the contact breaker assembly; the 1100 does not.
So, on an 1100 you can use the R/H 1000 head with just an empty c/b box and using the 1100 ignition system, or use the entire 1000 head and ignition system and bypass the 1100 electronic system
On a 1000, you would have to find a way to have the 1100 head machined for the contact breaker system.
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jbombyk
Posts: 2
Joined: Wed Apr 20, 2011 7:17 am
Location: Carsonville Michigan
Motorcycle: 1981 gl1100

Re: cylinder heads

Postby jbombyk » Thu Aug 11, 2011 5:37 am

thank you I wokeup in the middle of the night thinking about this because they looked so similar.

Old Fogey
Posts: 724
Joined: Fri Oct 30, 2009 2:09 am
Location: Glasgow Scotland
Motorcycle: 1976 GL1000
1979 GL1000
Contact:

Re: cylinder heads

Postby Old Fogey » Thu Aug 11, 2011 6:33 am

Old Fogey wrote:Not from a GL100!
GL1000 and 1100 right hand heads are interchangeable. The left hand heads are also but with the proviso that the 1000 has the rear of it machined for the contact breaker assembly; the 1100 does not.
So, on an 1100 you can use the R/H 1000 head with just an empty c/b box and using the 1100 ignition system, or use the entire 1000 head and ignition system and bypass the 1100 electronic system
On a 1000, you would have to find a way to have the 1100 head machined for the contact breaker system.


Sorry, mis-typed: "So, on an 1100 you can use the R/H 1000 head with just an empty c/b box" should obviously been L/H head. You could also simply make up a blanking plate instead of using the empty points box.

One other point. All these heads have the cam carrier bolted to them before they are machined, so they become one unit. There is NO separate part number for the cam carrier. So keep the two parts together.


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'Impossible' is just a level of difficulty! The only stupid question is the one you didn't ask first!


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