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Post by drc174 on Dec 8, 2020 7:51:23 GMT -5
Hey,
Maybe someone has been as silly as me. What is a good baseline tune for a PWK24 on a QMB139. Might save me an hour or so.
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Post by CrankingWithCG on Dec 8, 2020 16:47:04 GMT -5
With my 150, it was the same sized jets as the cvk.
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Post by CrankingWithCG on Dec 8, 2020 16:49:17 GMT -5
I will say, i think a 24 is way too big unless youre big bore and stroked. I put a 28mm on my ported 155 and it sucks below half throttle. The 4 strokes dont provide the vacuum on first throttle opening to pull the fuel fast, so theres a horrendous bog youll never get rid of without modifying the idle fuel outlet.
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Post by badmotorscooter on Dec 8, 2020 18:23:01 GMT -5
PWK24 is too much for a 49cc 4-stroke. Probably too big for 100cc, more like 125cc for that size/type carb.
That being said, I think for street performance going to a larger carb without a BBK is a compromise at best. More top end power at the expense of low/midrange response.
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Post by CrankingWithCG on Dec 8, 2020 19:23:17 GMT -5
PWK24 is too much for a 49cc 4-stroke. Probably too big for 100cc, more like 125cc for that size/type carb. That being said, I think for street performance going to a larger carb without a BBK is a compromise at best. More top end power at the expense of low/midrange response. Exactly. When i build my fully big bored motor im using either a 22mm cvk or a 19/21mm polini cp. 24s are usually even too big for big bores. Try a 17/19mm polini or dellorto if you wanna do slide |
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