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Ski-Doo: S-2000 and older 1998 and older, all models in the S-2000 chassis and older chassis models
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Old 01-13-2017, 01:34 PM
Kyle kehn Kyle kehn is offline
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Default 1999 670 formula getting no air

My father in law had a crank go bad so be bought a lower end from a 700 and put his block on it kept carbs and pistons and everything else from 670 the only thing he used from 700 was the crank and housing now it Boggs out at 4000 rpm. If I gut the air box it runs good what is wrong?? Do I need to re jet??
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Old 01-13-2017, 08:09 PM
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olymon olymon is offline
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Two totally different motor styles. Rotary valve 670 versus reed 700 How is that coming together??

Making JIS screws into junk
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Old 01-13-2017, 08:26 PM
Bedhead Bedhead is offline
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This could be interesting to follow........
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