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valve shims

15 posts in this topic

has anyone else tried to order odd size shims, ie 161 or 174, i cant believe all the dealers in my area can only get them in incriments of 5,

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According to the manual, that is all that is available. I know that the increment of 5 shims can take you from being on the tight side to the loose side (and vice-versa) depending on what your clearance is. Always run loose instead of tight and call it good...........

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increments of 5 equal .002 thousants,so that should be able to keep you within tolerances,and I too would shoot for the middle to loose side of the spec

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The specs listed are a large enough spread that the .05mm range are fine for getting the clearance within that spec.

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Someone was talking about sanding them down. Since the shims you need are always thinner (valves get tight, not loose) and the number on the shim is the thickness (1/100s of a mm?), use a caliper and 400 sandpaper on a hard flat surface and make custom shims. Only heard of it, haven't tried it.

Good luck,

mwc

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I have sanded down my shims so I can keep them at the tolerances I choose. Go buy a caliper or a micrometer and some 600 grit wet sandpaper. Tape the 600 grit sandpaper to a piece of glass and sand the shim in a figure 8 motion. It took like 10 mins per shim to grind down (real hard metal) but still much cheaper than $5 a shim. Good Luck,

Garrett

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try a different yamaha dealer. When I adjusted my valves i traded my old shims for new ones. The dealer that i used had odd sizes from trades and new shims in increments of 5. :)

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I grind them down in my shop on my surface grinder. Find a reputable machine shop in your area. They can do this with ease.

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i concurr (sp?) on the sanding them down, it works great and you can taylor them to your specs, i use a digtal mic and its real easy!!!!!!jimbo

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Hick,

The answer is NO. The hardness will remain unless you use a surface grinder and get them real hot. If you hand sand them as Motoman does you will have no problems at all. If you do use a suface grinder do so in small increments wetting the shims every new stroke you take.

Have fun

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Buy stainless shim stock in sheets. i've used it before to true up the bed on my Atlas metal lathe. Justcut to fit your needs. cya ian

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I sanded mine down with a piece of glass and 400 sandpaper. I know that Honda uses the same shims in one of their bikes and those might be able to get in odd sizes.

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the manual notes that u can get shims in 5mm intervals ,so always go on the loose side ...

and if u need 174 u can buy 175 and use waterpaper(i hope thats how u call it...) to shave it a bit...

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HONDA SHIMS! Aint no way a Honda shim is going in my bike! Your mouth should be washed out with Yamabond. Sheesh... whats next? Red plastic? Maniac :)

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