It's all in the correct tune,2% increase on a OK tune,10%+ if it's done right!
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The only way to get 10% is if the original airbox and exhaust are overly restrictive for the flow capability of the engine mechanically. In the case of the GS bikes though the airboxes and exhaust were pretty good and there is only so much air the head can process anyway.Ed
To measure is to know.
Mikuni O-ring Kits For Sale...https://www.thegsresources.com/_foru...ts#post1703182
Top Newbie Mistakes thread...http://www.thegsresources.com/_forum...d.php?t=171846
Carb rebuild tutorial...https://gsarchive.bwringer.com/mtsac...d_Tutorial.pdf
KZ750E Rebuild Thread...http://www.thegsresources.com/_forum...0-ResurrectionComment
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