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Tappet clearance & compression
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BigVic54
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Did you mean .01? .1 mm would not cause your issue, but I am questioning what you are actually reading. If you mean .01 mm, most feeler gauges don't go down that small. It would be a special set.
If they are reading as large as .2 mm, you may have a bent valve1979 GS550, 2003 R6, 1998 XR400 Dual Sport, 2004 V-Star.........
Decisions, decisions, what to ride, today.
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BigVic54
Originally posted by 8ball View PostDid you mean .01? .1 mm would not cause your issue, but I am questioning what you are actually reading. If you mean .01 mm, most feeler gauges don't go down that small. It would be a special set.
If they are reading as large as .2 mm, you may have a bent valve
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ddlaz
0.15mm is fairly large, but not wildly crazy. Going up 2 sizes on a shim will fix that gap.
0.07mm is within spec.
Do a leakdown or makeshift leakdown with a compression tester.
Put the cylinder to TDC where the valves are all closed.
screw in your compression tester hose into the spark plug hole, attach an air hose with low air pressure(~45psi?)
Listen for air leaking/hissing.
If you hear a significant amount of air leaking, chances are, your valves are bent.
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I made the Rookie mistake last week of using an Imperial feeler gauge to measure metric gaps. All my tappets ended up being around .23 mm when I used the 10 thou feeler gauge. Instead of their proper measurement between .08 mm and .13 mm. This was on a GS1150ES with adjustable screw tappets (16 of them!) but it wasn't too much of a pain to do it all again - except for having to take all the fairing off.Richard
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GS1150 EF bought Jun 2015
GS1150 ES bought Mar 2014: ES Makeover Thread AND blog: Go to the Blog
GS1100 G (2) bought Aug 2013: Road Runner Project Thread AND blog: Go to the Blog
GS1100 G (1) Dad bought new 1985 (in rebuild) see: Dad's GS1100 G Rebuild AND blog: Go to the Blog
Previously owned: Suzuki GS750 EF (Canada), Suzuki GS750 (UK)(Avatar circa 1977), Yamaha XT500, Suzuki T500, Honda XL125, Garelli 50
Join the United Kingdom (UK) Suzuki GS Facebook Group here
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Originally posted by londonboards View PostI made the Rookie mistake last week of using an Imperial feeler gauge to measure metric gaps. ...
You just have to be sure which numbers you are reading.
.sigpic
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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Siblings and Spouses
Mom's first ride
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.)
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ddlaz
Originally posted by Steve View PostNo problem using Imperial feelers, I do it all the time.
You just have to be sure which numbers you are reading.
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ddlaz
Too large of gaps would not show zero compression. In the worst case scenario of gaps being so large that the cam lobes don't touch the shim/bucket/valve train, the valves wouldn't open and no air would get in other than through small leaks at the valve seals or compression tester. With the little air, it already had in the cylinder prior to sealing, it'd have SOME compression.
Anyhow, the only way to get that large of a gap would be if the valve was stuck open all the way.
Question - how are you getting the bucket compressed for removing shims? the suzuki tool or zip tie method? I have a fear that maybe you opened a valve with the piston at tdc. The valve was opened on the piston top and bent....
Leakdown will tell you the reason why you have zero compression.
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Originally posted by ddlaz View PostQuestion - how are you getting the bucket compressed for removing shims? the suzuki tool or zip tie method?
Were the cam lobes in the correct positions?
.sigpic
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
Family Portrait
Siblings and Spouses
Mom's first ride
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.)
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Could they be so tight that the valve never fully closes?Current Rides: 82 GS1100E, 00 Triumph 955 Speed Triple:twistedevil:, 03 Kawasaki ZRX1200, 01 Honda GL1800, '15 Kawasaki 1000 Versys
Past Rides: 72 Honda SL-125, Kawasaki KE-175, 77 GS750 with total yosh stage 1 kit, 79 GS1000s, 80 GS1000S, 82 GS750e,82 GS1000S, 84 VF500f, 86 FZR600, 95 Triumph Sprint 900,96 Triumph Sprint, 97 Triumph Sprint, 01 Kawasaki ZRX1200, 07 Triumph Tiger 1050, 01 Yam YFZ250F
Work in progress: 78 GS1000, unknown year GS1100ES
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BigVic54
Originally posted by Steve View PostWe have also had NO confirmation on the method used to check clearances.
Were the cam lobes in the correct positions?
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ddlaz
No offense but do you mind sharing your clearance numbers and their shim sizes so we can help you better? I'd hate to have you wait just to find out that they weren't enough.
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BigVic54
Originally posted by ddlaz View Post
Question - how are you getting the bucket compressed for removing shims? the suzuki tool or zip tie method? I have a fear that maybe you opened a valve with the piston at tdc. The valve was opened on the piston top and bent....
Leakdown will tell you the reason why you have zero compression.
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