jumps out of gear - Honda RC51 Forum : RC51 Motorcycle Forums
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post #1 of 23 (permalink) Old 07-05-2013, 02:52 AM Thread Starter
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jumps out of gear

although its only happened a couple of times i thought id get an answ to this prob. very rarely, when im pushing hard and go up to 5th or 6th and the throttle is all the way open, theres been a couple of times where the revs jump up for a second, like something slipped, or it jumps out of gear. after that everthings fine. but its annoying when it happens.

its maybe happened 3 times in 8 months of ownership. it can only be the chain or the gears imho

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post #2 of 23 (permalink) Old 07-05-2013, 03:27 AM
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Have you replaced your clutch disks recently?

At least take them all out and do a visual check on the iron ones NOT to be like rainbow discolored and your friction ones measure their thickness and make sure their friction material is not all black like coal.
Also measure the pressure plate's springs.

Follow the service manual on the measurements.


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post #3 of 23 (permalink) Old 07-05-2013, 04:07 AM Thread Starter
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yeah, did all that when i replaced my clutch springs mate. me and sp1jock checked and measured everything and theyre fine

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post #4 of 23 (permalink) Old 07-05-2013, 04:37 AM
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When the engine revs up and then engages the gear back, does it feel like grinding gear teeth inside?


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post #5 of 23 (permalink) Old 07-05-2013, 05:59 AM
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Maybe something funk going on with the shift drum? could also be the other parts that mate to the drum. Maybe the shift forks or the locator spring/star thingy. (forget what its called).

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post #6 of 23 (permalink) Old 07-05-2013, 07:41 AM
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If itís a mechanical issue, could be worn shifter fork or more likely worn engagement dogs.

But, most likely you are not fully engaging the gear dogs upon hard acceleration, this will eventually wear the engagement dogs.
Make sure your shifts are quick and firm using the full lever travel.
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post #7 of 23 (permalink) Old 07-05-2013, 03:31 PM Thread Starter
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When the engine revs up and then engages the gear back, does it feel like grinding gear teeth inside?
thats a negative

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post #8 of 23 (permalink) Old 07-05-2013, 03:34 PM Thread Starter
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are worn shifters or dogs easy enough to check and/or replace or is it a nightmare?

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post #9 of 23 (permalink) Old 07-05-2013, 04:53 PM
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are worn shifters or dogs easy enough to check and/or replace or is it a nightmare?
Shift drum can be inspected not too difficult if you are inclined not dead simple but not too hard. But to check the engagement dogs the engine cases must come apart. About as big a job as could be on the RC...now if it had a cassette transmission...



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post #10 of 23 (permalink) Old 07-06-2013, 03:55 AM
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could be a worn out detent spring? not fully allowing gear to stay in, otherwise i'd say worn gear, does it only do it in the top gears or have you had it happen in all of them? i've had this symptom once but soon realised it was actually the bike spinning up the rear in the wet coming off a roundabout, only knew it was still in gear when it gripped and shook the bars angrily at me lol
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