Timing ajustment


Information and questions on GL1100 Goldwings (1980-1983)
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Puma
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Joined: Sun Mar 13, 2011 2:38 pm
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Motorcycle: 1980 GL1100 Interstate Currently working on a 1994 SE 1500

Timing ajustment

Postby Puma » Mon Sep 26, 2011 7:55 pm



I purchased a 1980 1100 that has just sat for about 6 years. I have removed the carbs and cleaned them and put them back on and did get the bike to start but not run very well. It does appear to be back firing a little through the exhaust. Is there some way to adjust the timing a little?



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virgilmobile
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Re: Timing ajustment

Postby virgilmobile » Mon Sep 26, 2011 10:01 pm

Actually it's preset at the factory and should never need adjustment,however if the need is there,it can be adjusted by loosening the vacuum canister retainer bolt and rotating it ccw or cw.
I found this near impossible to do.

Verify timing with a strobe.A couple of methods are posted here.My favorite is to strobe the camshaft pulley.You can verify timing,mechanical advance,and vacuum advance functions.

Backfire in the exhaust is a rich fuel flow.Verify by the plugs,I'll bet there sooty black.Pop the carbs off and super clean the slides.They must be butter smooth full stroke in the cap.

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RBGERSON
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Re: Timing ajustment

Postby RBGERSON » Tue Sep 27, 2011 9:53 am

If the cam belts are off by a tooth or two could let it backfire..or if you valves are set wrong..
HAD LOTS OF GOLDWING 75-83
NOW INTO 1500'S..RIDING A 1998 SE

FAIR WINDS,
RB

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WingAdmin
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Re: Timing ajustment

Postby WingAdmin » Tue Sep 27, 2011 12:38 pm

RBGERSON wrote:If the cam belts are off by a tooth or two could let it backfire..or if you valves are set wrong..


If the cam belts are off by a tooth, you will have poor running, poor mileage, and possible backfires.

If the cam belts are off by two or more teeth, you will have engine damage as the pistons collide with the valves.

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littlebeaver
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Re: Timing ajustment

Postby littlebeaver » Tue Sep 27, 2011 4:38 pm

Did you pull the idle jets when you cleaned your carbs? Did you check the float heights?

Puma
Posts: 4
Joined: Sun Mar 13, 2011 2:38 pm
Location: Innerkip Ontario Canada
Motorcycle: 1980 GL1100 Interstate Currently working on a 1994 SE 1500

Re: Timing ajustment

Postby Puma » Tue Sep 27, 2011 7:04 pm

virgilmobile wrote:Actually it's preset at the factory and should never need adjustment,however if the need is there,it can be adjusted by loosening the vacuum canister retainer bolt and rotating it ccw or cw.
I found this near impossible to do.

Verify timing with a strobe.A couple of methods are posted here.My favorite is to strobe the camshaft pulley.You can verify timing,mechanical advance,and vacuum advance functions.

Backfire in the exhaust is a rich fuel flow.Verify by the plugs,I'll bet there sooty black.Pop the carbs off and super clean the slides.They must be butter smooth full stroke in the cap.


You are right there was too much fuel. I have cleaned the slides and started the bike but now have found that it will not idle. I can keep it running if I keep the revs. up. I didn't put the air filter back on to try this does that make any difference? I admit that I am not good at what to do with carbs and how to figure out what is wrong but with some instruction I can usally do the work.
Thanks

Puma
Posts: 4
Joined: Sun Mar 13, 2011 2:38 pm
Location: Innerkip Ontario Canada
Motorcycle: 1980 GL1100 Interstate Currently working on a 1994 SE 1500

Re: Timing ajustment

Postby Puma » Tue Sep 27, 2011 7:10 pm

littlebeaver wrote:Did you pull the idle jets when you cleaned your carbs? Did you check the float heights?


I did get the bike to start with the help from another quote about cleaning the slides but no I didn't pull the idle jets and I don't know how to check the float heights. I am not really knowlegable in carbs but with a little help can do the work. Where are the idle jets? When I got the bike to start and run it would not idle and had to keep the revs. up to keep it going.

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littlebeaver
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Re: Timing ajustment

Postby littlebeaver » Tue Sep 27, 2011 8:14 pm

The idle screw is in one of those towers once you remove the float bowl covers and on each carb, I used a easyout tool and a small adjustable wrench to remove mine just lightly tap it on and turn it CCW and it will feel like it's going to break and then it will snap the seal loose and out comes your jet .., other's do it different, they use screws and such. :shock:[cave people] :lol: . Do you have a manual ? The float heights are in the manual, there are many write ups on that here somewhere as well...Don't worry, we can walk you thru it,,..Many of us here have done all of these procedures, your on your way to have a fine running machine..Just ask away, someone here will help...I think the float heights are 15.5 mm, I could be wrong so ya better check that... :D Oh, soak the jets in carb cleaner overnight and use a very small firm wire like off a wire brush to clean...#2 ext. bit [easyout]..Once this is all done just tap in the jets lightly and turn CW to remove the bit..Simple..Then start it up, if you have the floats right and the jets are clean with the new kit you bought, your bike should just run very well..If not... go to the next item...Wires, plugs, pulse generator, spark units, coil, crack main fuse, Intakes leaking, air filter. fuel filter. ect. compression test.. :shock: You'll get it, this I know..

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littlebeaver
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Re: Timing ajustment

Postby littlebeaver » Tue Sep 27, 2011 9:15 pm

Puma wrote:
littlebeaver wrote:Did you pull the idle jets when you cleaned your carbs? Did you check the float heights?


I did get the bike to start with the help from another quote about cleaning the slides but no I didn't pull the idle jets and I don't know how to check the float heights. I am not really knowlegable in carbs but with a little help can do the work. Where are the idle jets? When I got the bike to start and run it would not idle and had to keep the revs. up to keep it going.

I didn't understand anything at first about most of this stuff :shock: :shock: , but once you read a bit everything seems to come into focus..Then you do a task and then another and so on..




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