GS 850 Valve Clearances

[67cuda340]

I checked my valve clearances on my 1980 GS 850 GT and this is what I have. Bike has 20000 miles on it.


exhaust 1 2 3 4
.027 .027 .038 .027
pucks 2.65 2.65 2.65 2.65
change to ? 2.60 2.60 2.60 2.60



intake 1 2 3 4
.027 .063 .051 .027
pucks 2.70 2.65x 2.70x 2.75
change to 2.65 ? ? 2.70


just looking for suggestions before I order.


thanks

[cowboyup3371]

Are these in millimeters or inches? If millimeters I would agree leaving intakes 2 and 3 alone.

[Steve]

Are these in millimeters or inches? If millimeters I would agree leaving intakes 2 and 3 alone.

They look like the metric approximations that are printed on INCH feelers.

I agree, you can leave intakes 2&3 as they are, but you only need to buy four shims.
Move IN 1 to IN 4, move any of your EX shims to IN 1, get four 2.60 shims for your EX valves.

Need someplace to keep track of all that?

.

[67cuda340]

GS 850 Valve Clearances

Yes these measurements are in millimeters from my inch gappers.

thanks for the feedback, moving the pucks around is good info.

[cowboyup3371]

Just remember NEVER turn the engine without a shim in a bucket. If you have to, use something like a quarter to hold the position or wait until you get the replacements and start with those first.

[Steve]

Yes these measurements are in millimeters from my inch gappers.

thanks for the feedback, moving the pucks around is good info.

Since you have INCH feelers, please use the INCH readings on them.

The metric numbers are APPROXIMATIONS.

They are not "pucks", they are "shims".

May as well get used to calling them by their proper names so we know what you are talking about.