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Valve clearnce issue. Helpp

  • Thread starter Thread starter Hoeffegt
  • Start date Start date
H

Hoeffegt

Guest
I'm working on a 1982 Suzuki gs1100l and I'm trying to check the valve clearence to see if they are withen spsc. But no matter where the cam position is I can not get any size feeler guage between the lope and the shim. Am I doing this right or is my vlalves that bad off where they are always rubbing the camshaft? If so what size shims would I need?? Its like this on all the valves
 
This is a very common issue that's well documented in older threads on the forum. Some hack neglected the valve maintenance on your bike and now all the clearance is gone. Hopefully you don't have any burned valves or scorched valve seats. At any rate, you now need a thin checking shim. Something in the 2.40 range typically does it. This shim will be (hopefully) several sizes thinner than what you have installed now, and will allow you to measure the clearance. Then it's a simple calculation to figure out what actual shim sizes you need.

Basscliff's website will provide you with a factory service manual so you can understand how to position the cams and check the valves properly. There is also a tutorial which will lead you through the process if you need even more help.

http://members.dslextreme.com/users/bikecliff/

Good luck
 
Assuming you have the cams positioned correctly as shown in the Suzuki manual, not incorrectly as shown in the Clymers, yes it's that bad. Do this, spin the shim in the bucket with your finger. If it spins easily there is at least some clearance, go one size smaller which is .05mm and you should be in the correct range which is .03 - .08 mm. If it won't spin there is less than zero clearance, go two sizes smaller, .10 thinner shim. You could possibly end up with .09mm or .10mm clearance, but that's OK, a lot of us use .10mm as the upper limit anyway. If there still isn't enough clearance it is WAY TOO TIGHT, you probably have a bunch of burned up valves anyway.
 
Wow thanks for the fast responses and great knowledge! Unfortunatly I'm at work right now and cant check till tomorrow. I bought the bike at an auction for 200 bucks and the tags on it expired in 2003 so who know how long its been sitting or when they were last checked.
 
The valves on these engines generally get tighter with wear, a lot of these bikes get parked when they valves get too tight for it to run well. Sometimes before valves get burnt, sometimes after.

A compression test or better yet a leak down test will tell you if the valves have been burnt. You may have gotten away with it.
 
bikemtn said:
Correct me if I am wrong but I thought an 82 1100 does not have shims? 16V TSCC?
http://members.dslextreme.com/users/bikecliff/images/16valve_adjustment.pdf
Click to expand...

The 1100L does have buckets and shims. It's an 8 valve engine, not the 16V TSCC. Here are the instructions on doing an 8 valve service:

8 Valve adjustment

2nd the making sure that the engine is in the correct position based on the FSM. Don't sweat burnt valves just yet. These are pretty tough engines and can survive some level of neglect. Get the valves adjusted first and then do a compression check just for piece of mind. Also 2nd the carb maintenance. Pretty good chance that the carbs are going to need a thorough run through. Don't cheap out here... Do the maintenance properly based on this:

Mikuni_BS-CV_Carburetor_Rebuild_Tutorial
 
Last edited:
JTGS850GL said:
The 1100L does have buckets and shims. It's an 8 valve engine, not the 16V TSCC. Here are the instructions on doing an 8 valve service:

8 Valve adjustment

2nd the making sure that the engine is in the correct position based on the FSM. Don't sweat burnt valves just yet. These are pretty tough engines and can survive some level of neglect. Get the valves adjusted first and then do a compression check just for piece of mind. Also 2nd the carb maintenance. Pretty good chance that the carbs are going to need a thorough run through. Don't cheap out here... Do the maintenance properly based on this:

Mikuni_BS-CV_Carburetor_Rebuild_Tutorial
Click to expand...


Thanks! I learned something new today!
 
is the specs suppose to be .03-.08mm for all valves? or are the intake valves suppose to be tighter? I finally good some good readings and the intake valves are all around .04-.03. the exhaust are between .07-.09 except one cylinder at .02.
 
tkent02 said:
There were 1100Ls made with both types of engines, depending on the year.
Click to expand...

Agreed. The chain driven 1100L's were TSCC while the shafties were 8V. Just wanted to point out that, in 1982, there were 8V GLs and Gs. Thanks for clarification.
 
Hoeffegt said:
is the specs suppose to be .03-.08mm for all valves? or are the intake valves suppose to be tighter? I finally good some good readings and the intake valves are all around .04-.03. the exhaust are between .07-.09 except one cylinder at .02.
Click to expand...

All valves, both intake and exhaust, had the same cold spec.
 
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