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Everything Dirt Bike
General Dirt Bike
Setting the Fuel Mixture Screw?
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<blockquote data-quote="ossagp" data-source="post: 176133" data-attributes="member: 1650"><p>Most two strokes are jetted a little rich for me on the low end. If the enrichenor isn't needed for long, we are all giving up some hp (small amount really) at the higher revs. Road racers and flat track bikes alike used to be push started almost exclusively. One reason was a weight savings, but many of the flattrackers retained the kick start anyway (TT races in particular had stalls and slideouts that could be overcome and points salvaged). One of the reasons for the push starts by the guys who were fastest (Kenny Roberts, Gary Scott, Hank Scott, Keith Mashburn etc) was because they were jetted so lean that the riders would get tired kicking them and from their dad's to the mechanics it was easier to just push them. Those critters ran some pretty oil rich mixes, had electrics that weren't at all like today's (points in many cases) and lots of times had little for brakes. So slowing with a compression release and the motor was common then. So were fouled plugs if yours was an easy starter. </p><p></p><p>For those guys the extra .75 hp plus the reduced chance of fouling or nearly fouling was a pretty strong motivator.</p></blockquote><p></p>
[QUOTE="ossagp, post: 176133, member: 1650"] Most two strokes are jetted a little rich for me on the low end. If the enrichenor isn't needed for long, we are all giving up some hp (small amount really) at the higher revs. Road racers and flat track bikes alike used to be push started almost exclusively. One reason was a weight savings, but many of the flattrackers retained the kick start anyway (TT races in particular had stalls and slideouts that could be overcome and points salvaged). One of the reasons for the push starts by the guys who were fastest (Kenny Roberts, Gary Scott, Hank Scott, Keith Mashburn etc) was because they were jetted so lean that the riders would get tired kicking them and from their dad's to the mechanics it was easier to just push them. Those critters ran some pretty oil rich mixes, had electrics that weren't at all like today's (points in many cases) and lots of times had little for brakes. So slowing with a compression release and the motor was common then. So were fouled plugs if yours was an easy starter. For those guys the extra .75 hp plus the reduced chance of fouling or nearly fouling was a pretty strong motivator. [/QUOTE]
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Setting the Fuel Mixture Screw?
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