Quote from: sledge on June 10, 2017, 01:26:41 AM
To answer the original question.....

14.5mm ID, 1.9mm thick.

14.5 mm diameter sorry, no. 29.5 I think. Yamaha XJ series form the 80's is 29 and will fit in a pinch But no 14.5 wont. Or it will fly out.
Cool.
Buddha.

From online parts lists:

O RING (D:1.9,ID:14.5). 09280-15006

By the way, the original question is 2 years old. 

Quote from: Toner on June 09, 2017, 07:19:46 PM
Welp, I did the valve clearance check again.
Wasn't any easier getting those shims out 
Bought a proper mechanical vernier caliper to get two decimal places this time.
Here are my measurements:



................................
exhaust - top left (Stamped 2.60mm | Measured 2.66mm)
valve clearence: .09 - .1mm

exhaust - top right (Stamped 2.65mm | Measured 2.66mm)
valve clearence: .09 - .1mm

intake  bottom left (Stamped 2.50mm | Measured 2.52mm)
valve clearence: .08 - .09mm

intake bottom right (Stamped 2.55mm | Measured 2.56mm)
valve clearence: .08 - .09mm
.........................................

Hoping to get some help with a couple of questions. 

Three of the shims measured roughly the size which was stamped out them  (within .01 — .02 mm). 
Perhaps this is due to the accuracy of my caliper as it is listed as having a +/- 0.02mm accuracy rating.
.02mm is the smallest increment. 

But the left exhaust shim was stamped 2.60mm but measured 2.66.
Does that sound right? Is it possible the shim expanded?
Perhaps it was stamped in error?

I measured the clearance in the two intake valves as .08
A .09 feeler gauge leaf would not fit in either. The .08 leaf would. 
This seems to be just in spec as the Haynes manual says the clearance has to be between .03 and .08mm.

For the exhaust valves, the clearance was .09mm.
A .1mm feeler gauge leaf would not fit but the .09mm leaf would in both. 

Before someone on here suggested running the exhaust valves at .1
BaltimoreGS say that's fine too in this vid: 
https://www.youtube.com/watch?v=jIL0eMzRPF8

You think .09 is good enough or should I get new shims? 
If my measurements are correct and If I am reading the shim size table in the Haynes manual correctly I could get two 2.70 shims for each exhaust valve. 
Does that make sense. Have I done the calculations right?

Look good to me, I'd leave them go  for now.

Quote from: gsJack on June 10, 2017, 08:08:19 AM


By the way, the original question is 2 years old. 

I had noticed but given that the O/P had gone back to his original post and that no one else had answered his question in the 2 years......... 

Its why I said 'original' question.....

Is that the  Gasket for the Breather Cover in that pic? 
I was thinking of getting a new one but the new ones look flat, without the grooves and bumps. 
Do they mold around the metal to take that shape  and you screw them down?
Also, the new ones look black, not brownish.
They one on the head cover looks like it's made out of cardboard.



Also, try and avoid non-Suzuki head cover gaskets. The one I got was too small. Just keeps popping out. 
Tried to mend the old one (a small tear) with some silicone gasket paste. I'll see if that works before buying a new one. 

Quote from: gsJack on August 30, 2015, 04:06:33 PM
They all look good to me I wouldn't change any shims.  I set exhaust valves at .003-.005" (.08-.13mm), Suzuki .001-.003" spec is too tight for exhaust valves for long life.

100% correct

Maybe three of them are around .08 or a little higher. Is that ok you think?

Mine are currently .06 all around, I'm content but I'd be happier if they were .09

Thanks guys, I'll leave the shims this time so. 
I put the head cover back on with the original gasket as the new one is too small. 
It had a tear in it but I patched it with a bit of liquid gasket. 
If it leaks, I'll get a new OEM gasket. 
Gonna wash out my airbox tomorrow because I must have re-oiled the K&N filter too much and oil and some oil had drained out the drain-tube over-night unless people think I needn't bother. 
Been working on her since the weekend, still a bit of maintenance and cleaning to do. 
I wanna get her ready for some trips up the mountains soon. 
It's getting hot here.

Well guys, did my annual valve clearance check again, this time I didn't take the shims out to measure them and am just going off last year's shim size figures so that made it easier.
Here's the new clearance figures at the bottom compared to last years figures at the top



Again, the Haynes manual says the clearance has to be between .03 and .08mm for all the valves although someone on here suggested running the exhaust valves at .1 and BaltimoreGS said that's fine too in this vid: https://www.youtube.com/watch?v=jIL0eMzRPF8

So you can see:

The left & right exhausts' clearances have increased in size, they now fit a .102mm feeler gauge leaf but not a .127mm. 
Do you think I should buy new shims?

The left intake valve clearance has also increased. It now fits a .09mm feeler gauge leaf but not a .1mm
The right intake valve clearance has stayed the same. It fits a .08mm feeler gauge leaf but not a .09mm

Perhaps I should change them both too? or maybe just the left one?

Still wondering too, do shims change their size? Is it normal for them not measure the size that is stamped on them?
All of them are close (so it could just be my calipre) except for the the left exhaust shim which is stamped 2.6mm but measured 2.66mm last year when I checked.

So I'm thinking of getting a:
left exhaust shim 2.7mm
right exhaust shim 2.7mm
left intake shim 2.55 mm
right intake shim 2.6 mm

Changed three of the shims today, going to put the info here as a record for looking up next year.

The only shim I did not change was the left exhaust as when I changed to a 255,  I could not get a .03 feeler gauge in and advice on this forum suggested it would be better to leave it wide rather than tight.

All the other shims went up one size. 
The left exhaust is now a 265 shim giving a clearance between .063 and .076
The right exhaust is now a 270 shim giving a clearance between .038 and .04
The left intake is still a 250 shim giving a clearance between .09 and .01
The right intake is now a 260 shim giving a clearance between .03 and .038