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Low compression?

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I have an 03 450 that I just put new valves in. I had the valves cut in and the springs replaced. The valves are all adjusted correctly I am just not sure about the automatic compression relase. I have an 04 wiseco piston in it and the compression in the cylinder is only 95lbs. I did a leak test and there is no leak. Does anyone have any miracle ideas. I have never had this many problems with one bike in my life. It is making me want to go back to a CR250. Is the reading in the cylinder affected by the compression release for starting?

Mike :)

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Is the reading in the cylinder affected by the compression release for starting?

Mike :)

If you are using a standard compression gauge then the answer is yes.

The better way is to use a leakdown gauge. The decompression mechanisim doesn't come into play with that method cause you aren't turning the engine over. I've never used a std gauge on my 450 but 95lbs sounds about right.

Lots of little new tricks to learn when going 4-stroke.You'll have to learn them sooner or later cause for better or worse the 2-strokes days are numbered.

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