November 22nd, 2019, 09:14 PM | #1 |
ninjette.org newbie
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Revs fluctuating when in gear and and standing still.
Hello, I have an '09 Ninja 250R EFI.
Whenever I stop, in gear whether it be first or second, with the clutch in, the revs will fluctuate rapidly between 1.9k and 2k. This'll stop the moment I put it into neutral, or pull off. Any insight is appreciated! Thanks. |
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November 24th, 2019, 10:23 AM | #2 |
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Hi and welcome to Ninjette!
I think this indicates sticky clutch? Try tightening cable 1/2 turn (lengthen housing). Unscrew adjuster at lever-perch by 1/2 turn. |
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November 24th, 2019, 07:22 PM | #3 |
Rev Limiter
Name: Jay
Location: WI
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Does seem odd that it would change when in-gear or neutral unless the clutch needed adjustment as Danno noted, but the mixture may be on the edge of being too lean or there could be a small vacuum leak.
Have you made any adjustments to the idle mixture screws? Check the clamps on the manifold between the carb and head to make sure they are snug. Also look for small cracks in the rubber. EDIT - I missed the part about the F.I. - so no idle mixture adjustments... I would consider the fuel - how old is it? How long have you had the issue? Does it do it when hot, cold, or both? Make sure the fuel is fresh and run a strong fuel system cleaner like Chevron Techron Concentrate now and once per season. Check a Service Manual for the TPS setting and set it. Last futzed with by jkv45; November 25th, 2019 at 08:15 AM. |
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November 24th, 2019, 08:38 PM | #4 |
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November 24th, 2019, 08:50 PM | #5 | |
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Quote:
Bike in gear, clutch lever fully pulled in ...normal idle RPM....RPM's rise a few hundred RPM only when clutch is nearly released, almost but not quite where grab occurs.....but at a point where the lever is actuating the clutch switch. Its been described on a forum (the poster mentioned it being described in your UK Bike magazine) as a "throttle assist", works in conjunction with the lever mounted clutch safety switch to raise RPM to lessen the chance of stalling while easing clutch engagement. RPM rise does not occur pulling/releasing clutch while in neutral. RPM rise occurs only in gear and RPM can be modulated with clutch pull via activating the switch at its certain point of engagement with clutch lever. So its programmed into the ECU by design. That all make sense? This all sound like your scenario? Gotta check my Honda manuals for further detail.
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November 24th, 2019, 09:39 PM | #6 | |
ninjette.org newbie
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Quote:
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November 25th, 2019, 08:14 AM | #7 |
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.
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Edited my previous post and added a couple suggestions.
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November 25th, 2019, 11:15 AM | #9 | |
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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Quote:
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November 25th, 2019, 11:32 AM | #10 |
.
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Good to know. SV650 is on my radar for when I finally purchase a brand new motorcycle, anyway
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November 25th, 2019, 06:57 PM | #11 |
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Suzuki evidently calling it "low RPM assist".
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