Question about Suzuki GS 400 E Motorcycles

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I put k&n filters and free flowing exhaust. took it to have carbs jetted. they had to go up on small about 5 sizes and about 20 on other. bike runs good on bottom and even better on top. the middle is not good. what to do? 1980 gs 450s.

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  • Suzuki Master
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The middle range is controlled by the slide needle , so if you raise or lower it\ them a notch, depending on whether it is rich or lean when it is not so good.
If you try it with the choke on is the middle better or worse, this may help determinr if it is rich or lean

Posted on Sep 01, 2010

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Posted on Jan 02, 2017

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PEUGEOT Speedfight 2 Owner Manual

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Try to adjust valves sometimes small gap will cause engine to respond rough if valves are not adjusted. Good Luck.

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