Quick turn on throttle and Z dies-jetting problem?

5 replies to this topic
  • SupermotoByron

Posted 03 February 2012 - 09:49 AM


When idling a very fast turn on the throttle kills the engine, if i roll on a little i can rev it up quick and no problems, but even a small instant change in throttle from idle kills it even when the bike is warm
is this normal? or maybe a jetting issue?
3x3 and yosh rs2 at sea level with 145 main and clip on needle in 4th position, stock pilot jet, fuel screw maybe 3 turns out
it idles good and runs good otherwise
please halp

  • JEB1962

Posted 03 February 2012 - 11:09 AM


what kind of carb ?

Edited by JEB1962, 03 February 2012 - 11:12 AM.

  • timbanditos

Posted 03 February 2012 - 11:34 AM


Is your idle set high enough? I had to bump mine up once to eliminate that.

  • Craigo 485sm

Posted 03 February 2012 - 05:16 PM


My guess is it's a Mikuni....Which jet kit are you running?
How is it's general performance ?

  • SupermotoByron

Posted 03 February 2012 - 07:20 PM


stock carb, jd jet kit
general performance is great, idle seems pretty good might be a little slow though ill check that first

  • Craigo 485sm

Posted 03 February 2012 - 07:28 PM


If you have a tach set to 1700/1800 rpm...It's not uncommon to have a some hesitation from low rpm...
I wouldn't be concerned about it's static performance as its all good when when riding..

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