Rejetting 77 gs550 for pods and pipes

[Steve]

Can I follow this video for doing valve check even though its not exactly the same as gs550? I can't find any detailed video with an older gs, but from the little I know about valves they look very similar to the written tutorials i've read. But I just need a visual while following along with the manual for the correct specs. https://www.youtube.com/watch?v=jIL0eMzRPF8

The concept is correct, but all the details are wrong.

Even with the correct directions, too many 'newbies' get the procedure wrong on cam positioning.

It's not a video, but click HERE to visit our GSR Library (also known as BassCliff's "little" website).

While in the library, be sure to click HERE to get a copy of a service manual for your bike, then click HERE to see the tutorial on valve adjustment. The tutorial was written with an 850 as the 'victim', but it's virtually the same as your bike, as far as valve adjustment goes.

The technique in your video will work for actual shim replacement, but everything leading up to that will be different.

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[8ball]

Be sure you don't rotate the engine with any shims out. The cam lobe will gouge the shim bucket (ask me how I know). A quarter can be used in place of a shim, as a temporary place holder, if you are going to pull a few out to trade them or swap positions.

[Steve]

Be sure you don't rotate the engine with any shims out. The cam lobe will gouge the shim bucket (ask me how I know). A quarter can be used in place of a shim, as a temporary place holder, if you are going to pull a few out to trade them or swap positions.

You got lucky.

Usually, the shim bucket will tear the snot out of the edges of the cam lobes.

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[8ball]

The edges of the cam lobes are rough cast. Whatever damage to the edges that is done is easily fixed with a small file. The burrs on the buckets make it so the shims won't sit flat, which make that the more critical damage. I was able to fix that, as well, but it made the job a lot more complicated than it should have been. Not to mention all the inspection and cleaning to be sure no filings or metal shavings are left in the cam box..