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hey dyno experts

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why am a i getting this weird dip in the tq line were the 2 lines cross484dynocharts001.jpg

i have the same thing happen on a different build ,same machine, but now is seams to be more pronounced.

jetting is good . only thing we did not do is to try a pull with the spark arrester in the pipe.

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ah , i would like to do that but i dont have it , maybe i can get it .

your thinking its ''way'' rich at that point ? no not really

i did ask if mabe we could jet it out but the thought was no, not so much that it was a wast of time but that it could be hard to do as it was not that far off .

i'm wondering if it has more to do with the dynatek cdi ?

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51.7 to the wheel? Pretty salty! Anyways like eddie said without seeing a/f one can't determine whether that is just a result of VE at that point in the RPM's or if it's an actual jetting issue. Honestly that dip doesn't look bad enough to even be noticed while riding...

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well I'm going to rule out tire slip

this next graph is a run of my former build with a near similar dip ,different dyno a year ago , i atribulate the HP jump to RHC #187 cams

scan_952134048_1.jpg

mostly its a point of curiosity if it can be jetted out ,OK ,so much the better if not then owell so what i really dont spend much time at that rpm any way

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I'm going to guess intake or exhaust resonance. Something out of phase that works at a different RPM. Looks like a pretty nice curve to me. Air/fuel should clarify.

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i sent a PM to the guy that did the dyno run also sent a email to dynatek ,

it could be just me but it seams odd that it takes a dip at that rpm . no i cant feel it but if its a simple fix so much the better

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