April 30th, 2018, 12:30 PM | #1 |
ninjette.org newbie
Name: Ryan
Location: Cleveland
Join Date: Apr 2018 Motorcycle(s): Ninja 250r Posts: 2
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Erratic Idle
Hi all, I'm trying to track down a cause for a strange issue I'm having on my '05 250r. During cold startup my idle will vary wildly between 1200 RPM and 4500 RPM when on choke. It seems to hunt and peck for a consistent RPM but never seems to level out. I've also been unable to achieve a consistent idle at warm, but it's a slightly different issue. Each time I come to a stop the engine will idle at a different RPM, typically somewhere between 1200 and 2500 RPM, but it will hold at that RPM. Any clue what the heck is going on?
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April 30th, 2018, 01:09 PM | #2 |
ninjette.org certified postwhore
Name: AKA JacRyann
Location: Mesa, AZ
Join Date: Dec 2011 Motorcycle(s): CB125T CBR250R-MC19 CBR250RR-MC22 NSR350R-MC21 VF500F CBR600RR SFV650 VFR750F R1M ST1300PA Valkyrie-F6C Posts: A lot.
MOTY - 2018, MOTM - Nov '17
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Hi and welcome!
Hmmm, could be multiple issues: - sticky slides - vacuum leak - leaking vacuum hoses - clogged fuel circuits - clogged jets - incorrect pilot-screw settings |
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April 30th, 2018, 01:59 PM | #3 |
ninjette.org newbie
Name: Ryan
Location: Cleveland
Join Date: Apr 2018 Motorcycle(s): Ninja 250r Posts: 2
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I've checked both the boots and hoses for vacuum leaks and didn't find any, I guess it's probably time to pull the carbs and take a peak inside.
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May 1st, 2018, 06:28 AM | #4 |
Rev Limiter
Name: Jay
Location: WI
Join Date: Jul 2013 Motorcycle(s): '06 SV650n, '00 Derbi GPR, '64 CA77 Dream 305, '70 CL450 Scrambler, numerous dirt bikes Posts: A lot.
MOTM - Jun '18, Oct '16
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How old is the gas? Has it been sitting with a low level of fuel?
Bad gas or condensation in the tank can cause what you described. Adjusting the idle mixture screws to the optimum setting is will help it idle smoothly, as will precisely synced carbs. |
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