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KZ440 with KZ400 B2 Engine with hanging idle and backfire problem 17 Nov 2021 16:53 #858016

  • F64
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Do a full throttle run

Then tape up half of your air filter intake to create a richer mixture.
Do another run. Did it pull harder?

Take off the tape then unscrew your air filter and leave a slight opening between your air filter housing and airbox housing.
Do not remove your air filter housing as that would be too much air.
You are creating a leaner mixture.
Do another full throttle run.

Which run was better? normal, lean, or rich?
Make sure your carbs are synced before testing.
81-KZ440-D2.
Louis Dudzik's GM HEI ignitor conversion installed 2015 s3.amazonaws.com/gpzweb/Ignition/GPZgmHEImod.html
Motogadget m-unit blue installed 2017.
LIC, NY

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Last edit: by F64.
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