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Looking at purchasing an 83' GS1100E with around 27,000 miles. What should I look for in good compression #'s ?
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Values in the FSM. 150psi would represent a respectable engine.
Last edited by Nessism; 04-18-2020, 10:25 PM.Ed
To measure is to know.
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Get your numbers on a warm engine, if possible, be sure to hold the throttle wide open while checking.
Actual numbers can be interesting, but consistency across the four is just as important.
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mine: 2000 Honda GoldWing GL1500SE and 1980 GS850G'K' "Junior"
hers: 1982 GS850GL - "Angel" and 1969 Suzuki T250 Scrambler
#1 son: 1986 Yamaha Venture Royale 1300 and 1982 GS650GL "Rat Bagger"
#2 son: 1980 GS1000G
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Want a copy of my valve adjust spreadsheet for your 2-valve per cylinder engine? Send me an e-mail request (not a PM)
(Click on my username in the upper-left corner for e-mail info.)Comment
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Prior owner measured all cylinders for compression. All were even at 150 +
Purchased Bike
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Rule #1: Never believe Previous Owner without verifying.....Originally posted by GSDCW View PostPrior owner measured all cylinders for compression. All were even at 150 +
Purchased Bikesigpic
09 Kaw C14 Rocket powered Barcalounger
1983 GS1100e
82\83 1100e Frankenbike
1980 GS1260
Previous 65 Suzuki 80 Scrambler, 76 KZ900, 02 GSF1200S, 81 GS1100e, 80 GS850GComment
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What could happen if I did believe everything the PO told me?Originally posted by bobgroger View Post
Could I get a tan? Slightly warm? Or burned to a crisp?1982 GS1100E V&H "SS" exhaust, APE pods, 1150 oil cooler, 140 speedo, 99.3 rear wheel HP, black engine, '83 red
2016 XL883L sigpic Two-tone blue and white. Almost 42 hp! Status: destroyed, now owned by the insurance company. The hole in my memory starts an hour before the accident and ends 24 hours after.Comment
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What WOULD happen is you would get what you deserve.Originally posted by Rob S. View PostEd
To measure is to know.
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Carb rebuild tutorial...https://gsarchive.bwringer.com/mtsac...d_Tutorial.pdf
KZ750E Rebuild Thread...http://www.thegsresources.com/_forum...0-ResurrectionComment
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That's why I can't help smiling looking at my 11E. The gods were smiling on me when I bought her.
Last edited by Rob S.; 04-19-2020, 03:03 AM.1982 GS1100E V&H "SS" exhaust, APE pods, 1150 oil cooler, 140 speedo, 99.3 rear wheel HP, black engine, '83 red
2016 XL883L sigpic Two-tone blue and white. Almost 42 hp! Status: destroyed, now owned by the insurance company. The hole in my memory starts an hour before the accident and ends 24 hours after.Comment
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Rule #1A - Previous Owners LIE !Originally posted by bobgroger View Post
Not ALWAYS - but often enough for it to become a rule .
Hopefully you found the exception to that rule
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After. I purchased my 11E (running nicely) and then got it running even better, I asked my mechanic if we should check compression.
He said, "No. It runs great, you love it, right? Knowing compression could only cause you heartache."
I like that. I'm not even going to check the air in the tires any more!
1982 GS1100E V&H "SS" exhaust, APE pods, 1150 oil cooler, 140 speedo, 99.3 rear wheel HP, black engine, '83 red
2016 XL883L sigpic Two-tone blue and white. Almost 42 hp! Status: destroyed, now owned by the insurance company. The hole in my memory starts an hour before the accident and ends 24 hours after.Comment
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I like that mechanic.Originally posted by Rob S. View PostAfter. I purchased my 11E (running nicely) and then got it running even better, I asked my mechanic if we should check compression.
He said, "No. It runs great, you love it, right? Knowing compression could only cause you heartache."
I like that. I'm not even going to check the air in the tires any more!
If it runs great, you love it, and don't have the funds/time/energy to address any compression issues, then I would agree with him. Don't check it and enjoy the bike.
If you have the funds/time/energy, then by all means, check it.
I know the checking tire air pressure was a joke, but not checking tire air pressure can get you killed or seriously injured, whereas not checking compression won't do that.
1980 GS850G (~33,000mi)Comment
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Right you are. Checked, then added a few lbs front and rear before a 100 mile day today. Couldn't do the real 'buck' , though 'cause I was riding with little brother and wanted to keep an eye on him.1982 GS1100E V&H "SS" exhaust, APE pods, 1150 oil cooler, 140 speedo, 99.3 rear wheel HP, black engine, '83 red
2016 XL883L sigpic Two-tone blue and white. Almost 42 hp! Status: destroyed, now owned by the insurance company. The hole in my memory starts an hour before the accident and ends 24 hours after.Comment
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Just got my bike back from the shop. 150 # in all but one piston, that show 110 #s. Bike is running well, so I wonder if the test was off.1982 Suzuki GS650GComment
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Adjusting the valves might fix it.-Mal
"The only reason for time is so that everything doesn't happen at once." - B. Banzai
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78 GS750EComment
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Hey Rob, glad to hear you're feeli'n better? 100 mi. day, did you find a sidecar? or just heal quick? GSDCW, I've always wanted an "83" black eng. with the "82" Champagne colored body work. To me looks way better than the "83" bright red or drab blue W/ black eng. or the "82" champagne or maroon W/ silver eng. Congrats.1983 GS1100E, 1983 CB1100F, 1991 GSX1100G, 1996 Kaw. ZL600 Eliminator, 1999 Bandit 1200S, 2005 Bandit 1200S, 2000 Kaw. ZRX 1100Comment
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