Idle not the same sometimes
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Road Master
Joined: May 2012
Posts: 1,001
Likes: 107
From: Houston
Idle not the same sometimes
What would cause when riding or blipping the throttle and letting off back to idle, for the engine to idle a little different. Just installed new manifold and gaskets, no leaks there. AFR is the same just sometimes it will idle a little lower and sometimes a hair higher when letting off?
Mikuni HSR 42.
1997 EVO
Mikuni HSR 42.
1997 EVO
Road Warrior
Joined: Dec 2007
Posts: 1,286
Likes: 64
From: SoCal
I am not familiar with Mikuni carburetors but I will offer this; could it be that you have a small (and apparently inconsistent) vacuum leak somewhere on the Mikuni itself?
Try spraying (carburetor cleaner or water) on the carburetor while observing the engine's response.
Try spraying (carburetor cleaner or water) on the carburetor while observing the engine's response.
Last edited by megawatt; Jul 8, 2018 at 09:21 AM.
Road Captain
Joined: Jun 2018
Posts: 748
Likes: 359
From: Winnipeg
Ive been riding carb bikes for years- all different makes and models- idle will vary slightly from day to day depending on temp/humidity/how im riding the bike that day. If im hammering hard- idle tends to stay high. Just putting around- idle will stay low. Not a huge varience- but enough to notice.
Ultimate HDF Member
Joined: Aug 2010
Posts: 5,014
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From: Northern California
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