Low compression - Page 2 - Steve Saunders Goldwing Forums

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post #11 of 32 (permalink) Old 06-19-2018, 05:21 PM
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Don't overlook what Dennis suggested. The engine must be warm. It can make a lot of difference. If the bike idles and runs smooth I would never waste time checking compression.

Mike

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post #12 of 32 (permalink) Old 06-19-2018, 06:56 PM
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The knock could be the alternator rubber dampers,new one are easy to install.
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post #13 of 32 (permalink) Old 06-19-2018, 09:52 PM Thread Starter
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Don't overlook what Dennis suggested. The engine must be warm. It can make a lot of difference. If the bike idles and runs smooth I would never waste time checking compression.


Itís warm and I tried WOT on the worst cylinder.
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post #14 of 32 (permalink) Old 06-20-2018, 06:23 AM
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You should read up on the proper steps for doing a compression test. This is on a gl1000 but it is the same. http://www.randakksblog.com/engine-compression-testing/
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post #15 of 32 (permalink) Old 06-20-2018, 07:29 AM
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...

I went to harbor freight to pick up a leak down tester. Unfortunately the reviews are correct and the air fitting is not standard and they didnít have another that fits the threaded bore on the tool.
If you want a good quality leak-down tester, I recommend OTC tools products. I have both their leak-down tester and compression tester. Very good quality and come with all of the adapters you are likely to need.

They are available on Amazon. Here's a link to the leak-down tester.




***
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post #16 of 32 (permalink) Old 07-10-2018, 05:47 PM Thread Starter
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I finally got a chance to check compression again. This is after some ring free was added to a tank of gas. I also did the test at wide open throttle which I neglected to do last time.

I rechecked first with a closed throttle to compare apples to apples. Then with oil added. Then at WOT. Then with WOT and oil added. Then I ran out of battery.

What do you guys think?
(Leak down tester Iím waiting on from a friend so no news there yet).

I also did notice Iím in dire need of timing belts. Nothing has jumped a tooth but they have some really extreme differences between the tight spot and loose spot.


First number dry... second is with oil...third is WOT...fourth is WOT and oil
1: 118...134...162
2: 90...98...150...153
3: 105...112...176
4: 92...115...175...175
5: 112...120...170
6: 120...133...160


Previous numbers as previously posted (closed throttle)

1: 112
2: 87 (got it to 90 w penetrating oil)
3: 105
4: 97
5: 118
6: 115

Any thoughts?
Am I good to go just keep adding ring free?

Thanks all Iím slowly allowing myself to connect with this bike
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post #17 of 32 (permalink) Old 07-10-2018, 06:04 PM
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you ever consider saving a perfectly good motorcycle and spending a couple hundred bucks on a real mechanic?
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post #18 of 32 (permalink) Old 07-10-2018, 07:02 PM
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I'm afraid I have to agree with Claydbal. Valks are almost bullet proof. You do not say anything about how it runs other than it pulls strong. So what's the problem. Stop tinkering before you do more harm than good. Leave the chemicals on the shelf.

Sorry to be so blunt, but it sounds like you're looking for a problem that does not exist.

Ride it and enjoy it!!


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post #19 of 32 (permalink) Old 07-10-2018, 07:56 PM Thread Starter
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you ever consider saving a perfectly good motorcycle and spending a couple hundred bucks on a real mechanic?


Huh?
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post #20 of 32 (permalink) Old 07-10-2018, 08:21 PM Thread Starter
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I'm afraid I have to agree with Claydbal. Valks are almost bullet proof. You do not say anything about how it runs other than it pulls strong. So what's the problem. Stop tinkering before you do more harm than good. Leave the chemicals on the shelf.



Sorry to be so blunt, but it sounds like you're looking for a problem that does not exist.



Ride it and enjoy it!!





Rayjoe


Adjusting valves and checking compression is hardly tinkering. That I failed to go WOT the first time around on all the cylinders was a rookie mistake but youíll also note I did try it on number 2 cylinder with little difference.

It seems the additives to oil and gas have made a real difference if you look even just at number 2 cylinder as of the last check.

I take pride in my work and have had enough nightmare experiences with ďrealĒ mechanics that opting to suss out the condition of a used bike with an unknown history seems to me quite prudent.

If it upsets some people that I ask questions perhaps they are best staying out of the tech area of the forum or better yet forums altogether. Perhaps they havenít learned anything on here and thus have nothing to share but their own vitriol. Beats me and itís honestly sad to see.

Anyway enough about that.

According to an earlier post my compression is still low. Ive often heard/read that itís more important they are all even as opposed to hitting specific numbers so long as itís not terribly low.

So with that said are there any opinions on the compression numbers Iím getting?

Thanks!
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