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Post by zummerp on Mar 19, 2018 19:14:25 GMT -5
So I know that elevation, temperature, and other environmental factors can cause different results, but what are your personal best jet settings? I think this could be a very valuable starting point for new tuners! Mine are below.
Engine: QMB139, 49cc
BBK: Yes, 47mm
Air filter: 39mm cone filter
Carb: 20mm Keihin clone
Idle/Pilot: #30
Main: #90
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Post by benji on Mar 19, 2018 22:38:22 GMT -5
Engine: Yamaha zuma, oem minarelli longcase, 49cc
BBK: Yes, tpr black 47.6mm
Air filter: 44mm cone filter w small tape ring
Carb: 24mm oko
Idle/Pilot: #35
Main: #92
needle:jjh
Clip position: middle
Air screw: 1.0 turns out
Idle: 3k rpm
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Post by Lucass2T on Mar 22, 2018 6:37:27 GMT -5
So I know that elevation, temperature, and other environmental factors can cause different results, but what are your personal best jet settings? I think this could be a very valuable starting point for new tuners! Mine are below. Engine: QMB139, 49cc BBK: Yes, 47mm Air filter: 39mm cone filter Carb: 20mm Keihin clone Idle/Pilot: #30 Main: #90 Bad idea! Mark my words here. Less experienced tinkerers will use these 'guidelines' as a rule! They start out with these guidelines and fry their engine, blaming it on these lists. Instead they should find out themselves what works and what doesnt. The idea is good, help people with finding the right jetting, but in reality its counter productive. Look, in the end you'll have to be able to tell if your engine is lean or rich one way or the other. |
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