Shim selection Chart

[Guest]

Hi all,

Found this shim selection chart, if im not mistaken from GS1100 manual and can be reference for other GS valve clearance 0.03-0.08 mm. Very useful for person who hate to calculate (Like me )



Happy valve adjustment

[2BRacing]

Even easier is to request the very useful spreadsheet from member "Steve" (look at his signature). The program does the calculation for you and you can keep good record of all your valve adjustments!

[Steve]

Even easier is to request the very useful spreadsheet from member "Steve" (look at his signature). The program does the calculation for you and you can keep good record of all your valve adjustments!

Yep, just look down there for the info.

I don't have one sent to Malaysia, yet, but it's gone to 16 other countries besides the USA.

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[chuck hahn]

So the legend shows the lobes pointed at the rim of the head..I was always under the impression the measurement was done with the lobe directly 180 from the bucket...which ( or are both ways ) acceptable???

[MisterCinders]

Actually, you should use the service manual method for lining up the cams. You start with the No. 1 EX cam pointing forward, which puts the No. 2 EX cam pointing north. You can then measure both exhaust clearances.

Turn engine 180 degrees and now you can measure the No. 1 and 2 INT clearances.

Another 180 and you are ready for the 3 and 4 EX clearances.

One last 180 and you bring it home with the 3 and 4 INT clearances.

This way you get to check 2 clearances at a time. Also, you are measuring the clearance of each cam with its neighboring valve in the closed position, reducing any spring pressure from the adjacent valve that might throw off the clearance measurement.

[MisterCinders]

Even easier is to request the very useful spreadsheet from member "Steve" (look at his signature). The program does the calculation for you and you can keep good record of all your valve adjustments!

That's a lot of grid to tell you "If clearance too tight, go .05 mm smaller."

Most of that chart covers shims for valves that are way too loose. I have not encountered clearances greater than 0.10 mm. Even then, I am inclined to leave a 0.10 rather than bring it down to 0.05mm.

Happy valves applaud when I ride.

[Steve]

So the legend shows the lobes pointed at the rim of the head..I was always under the impression the measurement was done with the lobe directly 180 from the bucket...which ( or are both ways ) acceptable???

Following the book method, you will see that when the lobes are in the specified positions, neither lobe on that side of the cam is pushing on a valve. That keeps the cam centered in its bearings for more-consistent readings. If you rotate the cam to have the lobes pointing away from the valve, one or the other lobe will be pushing on a valve, skewing the cam in its bearing, giving you a slightly innaccurate reading. It actually gives you a slightly larger reading, leading you to believe you have enough clearance, when you might not really have it.

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