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Discussion Starter · #1 ·
i am new to this forum,my 85 aspencade has a serious sort of knocking noise from the engine when riding for long periods, i do have a weak cylinder
but the noise is not long in duration,any help thanks
 

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1985 GL1200 A
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953 Posts
Please tell us more about the symptoms and what conditions they occur under, OK? Any history of other recent problems is also useful.
Thanks.
 

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Discussion Starter · #4 ·
Please tell us more about the symptoms and what conditions they occur under, OK? Any history of other recent problems is also useful.
Thanks.
this bike was sitting for three years outside uncovered for 3yrs in the new england winters,i thought it was carb related because my warmup period is very long,it seems to have the issue when riding for long duration the noise sounds like a lifter bleelding down,milege is 78.000
 

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Going off the limited information, it sounds like a lifter going flat as the oil viscosity changes. Try some crankcase cleaner/and an oil change.
What is a weak cylinder, and what is a better quality oil?
 

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Discussion Starter · #8 ·
Going off the limited information, it sounds like a lifter going flat as the oil viscosity changes. Try some crankcase cleaner/and an oil change.
What is a weak cylinder, and what is a better quality oil?
i did a wet and dry compression test,before i added the oil the cylinder was at 130 lbs,after it was 180 lbs ,last year i used the walmart brand oil ,this year i used valvoline oil that was for 4 stoke,what is is good crankcase cleaner??? and do you suggest a different or better oil,thanks
 

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I can't hear your noise, so I can only guess based on your symptoms. I use hondaline oil. Others use their preference. It's like talking politics and religion, y'know? I figure the honda stuff is what the shop would use.
Most people add seafoam to the crankcase, run it, and dump it after a hundred miles or so. If I remember, the instructions are on the can. 1 1/2 oz per quart I think.
There are a lot of threads on lifter noise. This is just a good place to start.
 

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1985 GL1200 A
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ole wing,

Your compression ain't great and the wet/dry test shows ring damage. Well, I've seen them work their way in a bit better over time, but you've got to do two things to help it:

1. Run 4-6 ounces of SeaFoam or Startron in your crankcase for at least 100 miles of road speed riding, and also some local riding that requires plenty of shifting. Take a sample of your oil before you treat it and a sample of it after you drain it. Our bikes have 28 years of sludge and varnish in their engines and just like carbs, we've got to clean that sh*t out! Just changing oil doesn't do it, just like changing gas doesn't clean carbs, at least not anytime soon.

2. Use a high quality 10W-40 synthetic oil. I have had excellent results doing the above and putting in Amsoil. My '85 "clicks" when I shift, no crunchiness at all and it runs quieter, too. This is the BLOOD of your engine; don't go cheap on it. Besides, with Amsoil I have to change the oil 1/2 as often, so it evens out, even if I only value my motorcycle maintenance time at minimum wage!:ROFL:

Good luck!
 

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Discussion Starter · #11 ·
I can't hear your noise, so I can only guess based on your symptoms. I use hondaline oil. Others use their preference. It's like talking politics and religion, y'know? I figure the honda stuff is what the shop would use.
Most people add seafoam to the crankcase, run it, and dump it after a hundred miles or so. If I remember, the instructions are on the can. 1 1/2 oz per quart I think.
There are a lot of threads on lifter noise. This is just a good place to start.
thanks i will try all the above i do not what to replace or rebuild if not neccesary
 

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Discussion Starter · #12 ·
ole wing,

Your compression ain't great and the wet/dry test shows ring damage. Well, I've seen them work their way in a bit better over time, but you've got to do two things to help it:

1. Run 4-6 ounces of SeaFoam or Startron in your crankcase for at least 100 miles of road speed riding, and also some local riding that requires plenty of shifting. Take a sample of your oil before you treat it and a sample of it after you drain it. Our bikes have 28 years of sludge and varnish in their engines and just like carbs, we've got to clean that sh*t out! Just changing oil doesn't do it, just like changing gas doesn't clean carbs, at least not anytime soon.

2. Use a high quality 10W-40 synthetic oil. I have had excellent results doing the above and putting in Amsoil. My '85 "clicks" when I shift, no crunchiness at all and it runs quieter, too. This is the BLOOD of your engine; don't go cheap on it. Besides, with Amsoil I have to change the oil 1/2 as often, so it evens out, even if I only value my motorcycle maintenance time at minimum wage!:ROFL:

Good luck!
thanks i will try to get the junk out ,thanks for the help
 
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