Compression test


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littlebeaver
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Compression test

Postby littlebeaver » Fri Apr 03, 2015 3:48 pm



When I was down in Texas I bought a compression testing kit from HF, I was working on a guys bike and they wanted the compression tested :shock: I didn't have a tester so I went out and bought one... I never did test my bike until today... :lol: :lol: No need to, today I did the test, here are some photographs I took... I turned the kill switch to the off position then I opened the throttle wide open and then hit the button to get the highest reading, about 7 seconds or so..
I trapped it in between the wind deflector thingy
I trapped it in between the wind deflector thingy
[/attachment]
Pretty much across the board on all 4 cyl. I trust that's agood reading?
Pretty much across the board on all 4 cyl. I trust that's agood reading?
Attachments
Bam,  throttle open kill switch off, and I hit the start button 150psi
Bam, throttle open kill switch off, and I hit the start button 150psi



sportsfreaked
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Motorcycle: 1981 Honda Goldwing Interstate GL1100I
1985 Honda Goldwing Limited Edition gl1200

Re: Compression test

Postby sportsfreaked » Fri Apr 03, 2015 3:56 pm

Beaver if you're bored you can always come work on mine :D . I need my belts changed so when should I expect you ;) .
Thanks to all who answer and help. It is greatly appreciated!
Ed

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littlebeaver
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Re: Compression test

Postby littlebeaver » Fri Apr 03, 2015 4:02 pm

Ha ha ha I'll be happy to help you anytime.... I can't find my little clamps right now though, it's driving me nuts...girls had a garage sale and messed things up in my garage, I need those clamps man...

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mytown
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Re: Compression test

Postby mytown » Fri Apr 03, 2015 4:19 pm

I was about to ask whether all 4 plugs should be removed before testing when I grabbed my nearby FSM to discover that removal is recommended. Also per the FSM, normal is 171 psi, but you should be good to go provided the psi is above 142 and there is no more than a 14 psi variation between cylinders.

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Aussie81Interstate
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1981 GL1100 Interstate (sold)
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Re: Compression test

Postby Aussie81Interstate » Fri Apr 03, 2015 5:09 pm

Those figures are excellent.

I would have repeated the tests per cylinder with a teaspoon of oil down each. just to see if the compression rose dramatically.

:)

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Johnyy Smoke
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Vetter. "Its like Deja Vu all over again".

Re: Compression test

Postby Johnyy Smoke » Fri Apr 03, 2015 5:49 pm

Aussie81Interstate wrote:Those figures are excellent.

I would have repeated the tests per cylinder with a teaspoon of oil down each. just to see if the compression rose dramatically.

:)

At 150 any dramatic increase would blow the heads off! :lol: Regards, Johnny

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littlebeaver
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Re: Compression test

Postby littlebeaver » Fri Apr 03, 2015 6:07 pm

Oh crud, I just took out a plug and tested that cylinder leaving the others in place,, I suppose I can retest it... I didn't know to remove them all while testing, I remembered opening the throttle wide open though... .... :shock:

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littlebeaver
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Re: Compression test

Postby littlebeaver » Fri Apr 03, 2015 6:24 pm

sportsfreaked wrote:Beaver if you're bored you can always come work on mine :D . I need my belts changed so when should I expect you ;) .
are you serious because I can help you if you need it,,, I''ll just tell you how to do it and you do all the work...It's really simple...But it's nice having someone show you how.. I was scared to death doing this for the first time...Now after my trick of locking it down you can't really mess up...One guys marks were off and he noticed it after.. marks gotta be on target before locking it down...

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littlebeaver
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Re: Compression test

Postby littlebeaver » Fri Apr 03, 2015 6:30 pm

mytown wrote:I was about to ask whether all 4 plugs should be removed before testing when I grabbed my nearby FSM to discover that removal is recommended. Also per the FSM, normal is 171 psi, but you should be good to go provided the psi is above 142 and there is no more than a 14 psi variation between cylinders.

You are scaring me to death....Don't do that...LOL :lol:

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mytown
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Re: Compression test

Postby mytown » Fri Apr 03, 2015 6:50 pm

littlebeaver wrote:
mytown wrote:I was about to ask whether all 4 plugs should be removed before testing when I grabbed my nearby FSM to discover that removal is recommended. Also per the FSM, normal is 171 psi, but you should be good to go provided the psi is above 142 and there is no more than a 14 psi variation between cylinders.

You are scaring me to death....Don't do that...LOL :lol:


Sorry. :lol: But now that I'm back I just have to add to be sure that the choke is fully open, again per the FSM. :o I've only gotten into this once, but IIRC, those with alot more hands on experience would say your numbers are very good.

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mytown
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Re: Compression test

Postby mytown » Fri Apr 03, 2015 7:51 pm

littlebeaver wrote:Oh crud, I just took out a plug and tested that cylinder leaving the others in place,, I suppose I can retest it... I didn't know to remove them all while testing, I remembered opening the throttle wide open though... .... :shock:

I believe that the idea behind taking them all out is to take pressure off the starter and to allow it to give a quicker spin. I don't think leaving the other three in would affect the final readings. I can say from experience that leaving the spark plug holes open can result in something falling into the cylinder, so if you do it this way be sure to protect those holes.

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littlebeaver
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Re: Compression test

Postby littlebeaver » Sat Apr 04, 2015 1:25 am

I shall conduct another test tomorrow with the plugs out and a little oil this time..I will see what happens,,I actually read the manual tonight ha ha ha.....oops :lol:

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RBGERSON
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had every year from 75 to 83

Re: Compression test

Postby RBGERSON » Sat Apr 04, 2015 8:30 am

Compression test;

check/reset your valves
throttle open
choke off
stop switch turned to off(no spark)
all plugs out
crank until needle stops moving up but not more than 10 seconds

rest starter do the next cylinder. I do it with a warm engine for the oil's sake and less strain on the starter..smoother movement but that shouldn't change the numbers much.
HAD LOTS OF GOLDWING 75-83
NOW INTO 1500'S..RIDING A 1998 SE

FAIR WINDS,
RB

sportsfreaked
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Motorcycle: 1981 Honda Goldwing Interstate GL1100I
1985 Honda Goldwing Limited Edition gl1200

Re: Compression test

Postby sportsfreaked » Sat Apr 04, 2015 9:23 am

,,I actually read the manual tonight ha ha ha... When all else fails read the directions :lol:
Thanks to all who answer and help. It is greatly appreciated!
Ed

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littlebeaver
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Re: Compression test

Postby littlebeaver » Sat Apr 04, 2015 12:06 pm

when I bake I usually burn stuff, then I read the instructions..... :lol: I have always leave the plugs in place,, I know the engine wasn't very warmed up...Holy Toledo man....How in the fudge you you think Cave people find this crap out man..

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littlebeaver
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Re: Compression test

Postby littlebeaver » Sun Apr 05, 2015 12:17 am

I found my clamps,, they were clamps to my tablesaw that was covered by a tarp... :shock: I use those little buggers a lot... the larger one's too.. I call those larger ones
welders clamps.... :shock:

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littlebeaver
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Re: Compression test

Postby littlebeaver » Sun Apr 05, 2015 1:26 pm

I guess I have to rebuild my engine now... :shock: If 171 PSI is normal.... :lol: I know above 142 is ok...But it ain't 171 gosh dog it... :lol: By the way I added a little oil, really no change, and I pulled the plugs and still no real change... It did crank easier though..

sportsfreaked
Posts: 219
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Location: Independence, MO
Motorcycle: 1981 Honda Goldwing Interstate GL1100I
1985 Honda Goldwing Limited Edition gl1200

Re: Compression test

Postby sportsfreaked » Sun Apr 05, 2015 3:42 pm

You better get on that :lol: . I'm going to get a 85 gl1200 limited this week and give the gl1100 to my son after I change the belts and radiator fluid and hoses.
Thanks to all who answer and help. It is greatly appreciated!
Ed

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littlebeaver
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Special, 82 Kawa 750 CSR, 82 Kawa 750 LTD, 03 Kawa Nomad 1500, 99 Kawa Voyager 1200

Re: Compression test

Postby littlebeaver » Sun Apr 05, 2015 4:01 pm

I have a 1200 too.. Wow.... Kawasaki voyager though... :lol: Is that bike on Craigslist?

sportsfreaked
Posts: 219
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Motorcycle: 1981 Honda Goldwing Interstate GL1100I
1985 Honda Goldwing Limited Edition gl1200

Re: Compression test

Postby sportsfreaked » Sun Apr 05, 2015 8:44 pm

Beave no it's at a local bike shop here. It's in great condition and everything works on it and all the maintenance is done :).
Thanks to all who answer and help. It is greatly appreciated!
Ed

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littlebeaver
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Re: Compression test

Postby littlebeaver » Sun Apr 05, 2015 8:51 pm

I wish to see photographs of this Beast of a Goldwing...thanks,, You are welcome to post it here, when you get it home, and don't scratch it..... :D

sportsfreaked
Posts: 219
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Motorcycle: 1981 Honda Goldwing Interstate GL1100I
1985 Honda Goldwing Limited Edition gl1200

Re: Compression test

Postby sportsfreaked » Sun Apr 05, 2015 9:39 pm

Better yet I'll come see you with it :)
Thanks to all who answer and help. It is greatly appreciated!
Ed

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littlebeaver
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Re: Compression test

Postby littlebeaver » Sun Apr 05, 2015 9:42 pm

Ok man,, cool...Just PM me when you wish...I'm out my Kansas Speedway....

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WingAdmin
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Re: Compression test

Postby WingAdmin » Mon Apr 13, 2015 1:40 pm

littlebeaver wrote:I guess I have to rebuild my engine now... :shock: If 171 PSI is normal.... :lol: I know above 142 is ok...But it ain't 171 gosh dog it... :lol: By the way I added a little oil, really no change, and I pulled the plugs and still no real change... It did crank easier though..


171 is "normal" for a bike that just rolled off the factory floor. Yours is excellent for how old it is, and the fact that there was no change when you added oil says that your rings are in good shape too. You have nothing to worry about.




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