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2008 2t With Keihin Carb

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So I didn't run a comp test yet as my adapter is too tall and I don't wanna go through the hassle of dropping the engine just yet.  Here is a quick vid from today.  1700"  50 pilot, 115 main jet, JHL needle in 4th pos.  Air screw out 1.75 turns.  My beef is still with the off idle pop pop and lack of response.  How does it sound?

 

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  • dan williams
    dan williams

    Fine tuning my Keihin now so I'm getting good at taking the carb off. It's not necessary to take off anything more then the rear fender and not even that if you can find a way to position the air box

  • Dan, Another trick is, next time you have the airbox off, use a Dremel tool to radius the very front, inside if the boot, where it slips over the front lip of the bell of the carb. The boots of most

  • worldtrialchamp
    worldtrialchamp

    The Keihin PWK28 fitted to modern trials bikes has only one atmospheric port open, the other one is blanked off by the casting. I have done this mod to several bikes fitted with Keihin PWK28 carb. It

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It sounds normal on video but it's tough to tell anything not blatantly broken. The hill is probably not the most critical way to test. More its response to quick burst of throttle to get up a step. 

  • 11 months later...

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