Cam sprockets


Information and questions on GL1000 Goldwings (1975-1979)
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jryan19
Posts: 6
Joined: Wed Jul 01, 2020 3:56 pm
Location: United States
Motorcycle: gl 1000 ltd
BMW K1600 Grand America 2018

Cam sprockets

Post by jryan19 »



Hello from a new member. I bought a 1976 GL 1000 LTD. Of course it needs some work. I am trying to replace the timing belts. I got the 1and3 cam lined up perfect. Cam for 2and4 has 2 timing marks on it. One on the top with a small arrow pointing to it. and one below that with no arrow. Videos I have seen only show One timing mark. I can easily line up the belt on the lower mark but am having a hard time lining up with the mark with the arrow.

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jryan19
Posts: 6
Joined: Wed Jul 01, 2020 3:56 pm
Location: United States
Motorcycle: gl 1000 ltd
BMW K1600 Grand America 2018

Re: Cam sprockets

Post by jryan19 »

[url]Image

photo of cam sprocket with 2 marks. Any info is appreciated.
This is left side cam.
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DenverWinger
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1972 CL350 (1980-1988) sold
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Re: Cam sprockets

Post by DenverWinger »

That's a little arrow in the left circle


♫ 99 Little Bugs in the Code, ♪
♪ 99 Bugs in the Code. ♫ :(
♫ Take one down, Patch it around, ♪
♫ 127 Little Bugs in the Code. ♫ ♪ :shock:

~Mark
jryan19
Posts: 6
Joined: Wed Jul 01, 2020 3:56 pm
Location: United States
Motorcycle: gl 1000 ltd
BMW K1600 Grand America 2018

Re: Cam sprockets

Post by jryan19 »

Thanks. I thought it was the mark with the arrow. Maybe I need a friend to hold the crank position while I line up the cam. I have new idlers which are wider and may be making it harder for me to get the belt on. Still not sure what the lower mark is for.
User avatar
DenverWinger
Posts: 1713
Joined: Thu Jun 23, 2011 2:20 pm
Location: Denver, CO
Motorcycle: (s)
1980 GL1100 STD Vetter (2005-)
1993 GL1500 Aspencade (2017-)
1983 Trav-Lite Camper (2010-)
Past rides
1972 CL350 (1980-1988) sold
1978 Suzuki GS550 (1985-2005) sold
1977 GL1000 (2002-2006) sold

Re: Cam sprockets

Post by DenverWinger »

With belts on and Crank at T! the marks on the usually won't line up exact.

If you have them close enough where moving the belt one cog either way would make the marks line up worse they are correct.

The right cam belt can be fun. With the mark lined up one of the valves is just starting to open and the sprocket wants to rest about usually about two belt-cogs CCW from the timing mark. I don't fight the valve spring, I let the right sprocket go where it wants - and turn the crank pulley a corresponding 2 belt cogs in the same direction from the T1 mark. Then put the belt on. After the belt is on, if you rotate the crank back to the T1 mark you should see the right cam is lined up correctly, too.
♫ 99 Little Bugs in the Code, ♪
♪ 99 Bugs in the Code. ♫ :(
♫ Take one down, Patch it around, ♪
♫ 127 Little Bugs in the Code. ♫ ♪ :shock:

~Mark
jryan19
Posts: 6
Joined: Wed Jul 01, 2020 3:56 pm
Location: United States
Motorcycle: gl 1000 ltd
BMW K1600 Grand America 2018

Re: Cam sprockets

Post by jryan19 »

Thanks Denver winger. Sounds like good advice. I will try again tomorrow. I am sure I will have more questions coming.
jryan19
Posts: 6
Joined: Wed Jul 01, 2020 3:56 pm
Location: United States
Motorcycle: gl 1000 ltd
BMW K1600 Grand America 2018

Re: Cam sprockets

Post by jryan19 »

I did finally get them lined up with the correct marks. Thanks for the help. Adjusted the valves. That went ok. Next is the points. Already spent a bunch of time just setting the gaps. Not sure about the timing.


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