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Discussion Starter #1
I have a bike that is 30 years old with only 13,000 miles on it and everything is original. Just last year I replaced tires, that's it. Tires, when I replaced it, they were not in too bad shape. I am sure with 30 years of time, made the rubber brittle but it wasn't bad.

I think I know the answer to the last question but just wanted to hear opinion of other experts:
Q1: Is the 1200GL interference type engine?
Q3: Is there a way to peek at the belt to see what condition it is in?
Q2: Is the belt replacement needed?
 

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what he said. They're cheap enough and well worth the insurance. Yes it is an interference engine so if the belt snaps, you're done.. Just do it.
Belts to use from the DIY tutorial: Gates also supply the T070. You also have Quinton Hazell QTB142, Napa 250070, Dayco 95070, ADT37501 and some lesser known brands.
Same belt as Honda but way cheaper available any parts store. Plan an afternoon, then feel relieved.
 

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Make it simple. Mark your timing gears well and Lock down your timing pullys. I used vise grips on mine. Don't tighten the grips too tight but only enough to hold them in place. If either pulleys move any make sure you follow the instructions to the letter.
 

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yes... what they all said: the belts are relatively cheap and not that hard if you have basic mechanical skills. When I have done this in the past I also replace the radiator hoses. To me the biggest pain in this repair is pulling the radiator - which gives you a good reason to replace the hoses and put in new coolant.

Even though it has few miles you can bet that those belts need replacement. I have seen some UGLY belts on older bikes....
 

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Discussion Starter #6
OK I've decided to change timing belts. I ordered the belts on-line and it is on its way. I've search through on how-to information and I think I can manage.... However, I have two questions in the process of replacing belts.

Q1: When the water pump is loosen to drain out the coolant, do I need to put a new gasket in the place, at least?

Q2: I have GL1200 and it is 86 SEi (or same as 85 Limited). It seems that the timing mark inspection cap has a hose attached at the top (or it it something else?). Do I just remove the hose then screw off the cap? How does the cap come off on these model of GL1200? I have GoldWing Service manual and could not find this information. Anyone has done the work, I would appreciate the input.
 

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never had any luck seeing that timing mark thru the cap,with all plugs out of engine i just turn engine over using a wrench on the crank holding my finger over the #1 cylinder,when you feel pressure you are on the compression stroke of the #1 cylinder,then gently turn engine till all marks line up and you are on top dead center,now follow the videos for timing belt replacement
 

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Discussion Starter #8
never had any luck seeing that timing mark thru the cap,with all plugs out of engine i just turn engine over using a wrench on the crank holding my finger over the #1 cylinder,when you feel pressure you are on the compression stroke of the #1 cylinder,then gently turn engine till all marks line up and you are on top dead center,now follow the videos for timing belt replacement
If you've done it numerous time and know exactly what you are doing, I would say you are fine. But for me, the first timer, I would like to go through a recommended step by step. It is too risky, in my opinion.

Do you have trouble getting the cap open or is it that even with the cap open, it is hard to see the marking? Why do not check the crank shaft TDC through the opening? Or may be you are just comfortable using the #1 cylinder, feeling the pressure. Even if you have a one notch off on the timing belt, you are in trouble... That is too risky...
 

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try getting it up by my method 4 or 5 times and see if you come up the same each time,alot of times the marks wont be exactly same anyway due to belt stretch etc,but anything within one tooth will not hurt,more than 2 probably yes
 

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Last fall I decided to put new belts on my GL1200LTDs. I ordered the Dayco belts overnight from Autozone. When I got the belts did not like the looks of them, compared to the Honda or the Gates belts I've been using on my other bikes. I put them on anyway since I had them but frankly I've been worried about them ever since. They actually looked inferior just holding them in my hand. I don't like to put down someone's product but I can't wait to change them.
 

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Error! Please disregard my last transmission. I jumped the gun. The belts I got that I thought were inferior were Duralast 95070 NOT the Daycos. I just went out and got make sure. And even though they do only have 3000 miles on the Duralast belts, I can't wait to change them.
 

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snip...

Q1: When the water pump is loosen to drain out the coolant, do I need to put a new gasket in the place, at least?

Q2: I have GL1200 and it is 86 SEi (or same as 85 Limited). It seems that the timing mark inspection cap has a hose attached at the top (or it it something else?). Do I just remove the hose then screw off the cap? How does the cap come off on these model of GL1200? I have GoldWing Service manual and could not find this information. Anyone has done the work, I would appreciate the input.
Yes, remove the hose and there is a slot in that cap. Just unscrew it. If it has been on there a long time it will likely be tight. Get a large screwdriver in the slot and you should be able to get it. Use a flashlight to see the timing marks. Take all the sparkplugs out and the motor will be easy to turn.
 

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Just turn the crankshaft until the timing marks on the camshaft sprockets line up, mark the position of the crankshaft in case you accidentally turn it and proceed with the belt change.
 

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Discussion Starter #14
I have successfully put on new timing belts this afternoon. More and more I work on this bike, I am impressed how this bike is put together.

Because my SEi is so limited in space, I could not get the cap off from the radiator or remove overflow tube from the cap area. So I ended up draining coolant with the cap on and undoing the overflow hose at the reservoir end. It worked out good. Belt on there was Honda brand original and was in excellent condition. 30 years old belt looked as if it was new.

Also to get to the inspection hole, I had to undo the gas filter bracket and move it aside. The hose on top of the inspection hole cap to set aside then the breather hose. Screwing off the cap was not that hard to do. It is just that there is just no space in there to put my hand in to any work was the hard part because of all the stuff there getting in the way.

I have to mention that left belt got on without much trouble but the right side cam pulley just keep getting off the mark and it requires some effort to turn the pulley to keep it at the marked position to place the belt on. That took some time to put the belt on to a just right position.

I think if it was not SEi, I could have done it in 2 hours. So may wires jammed in there that getting the hands in there work was hard part and took time.
 

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Yep most timing belts look like new until the moment they break destroying your engine.
Good work.:claps:
 
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