fztenn
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Posts: 71
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Registered: Sept 2, 2018 4:54:31 GMT -7
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Post by fztenn on Feb 14, 2019 8:37:19 GMT -7
Hoping for some guidance here and thanks in advance! When shifting out of neutral into first gear (say like sitting at a long traffic light), there is a rather harsh (to me anyways) engagement going into first gear. This seems to have gotten progressively more noticeable over time. Bike only has 2,600 miles on it and I'm sure or hoping at least it just needs some adjustment of the clutch cable. All other shifting seems to be in order, just that initial "clunk"! Love tinkering with my bike, just not sure where to begin with this one...any guidance would greatly be appreciated!
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jroc
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Registered: Feb 18, 2018 7:47:50 GMT -7
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Post by jroc on Feb 14, 2019 9:49:00 GMT -7
My bike does the same. Both 09-14 R1's that I had did it too. I've found that pulling and releasing the clutch lever 2 to 3 times before shifting to first gear almost always eliminates it.
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Post by thefinn on Feb 14, 2019 15:38:00 GMT -7
Same goes if you misshift to neutral and try to get back into gear.
Its simply the difference between the speed of the transmission and the clutch. The transmission dog gear is stationary (in standstil situations), the cutch dog gear is rotating due to the engine oil making the transmission part of the clutch spin together with the engine part of the clutch although its fully disengaged. The clunk you hear is when the dog teeth engage and suddenly forces the cutch shaft of the transmission to stop spinning.
I dont think there comes any major wear from it, as there is not so much weight, and therefore not so much energy, on the shaft connecting to the clutch.
However, the sound is soulcrushing indeed. Why i try to avoid putting it in neutral.
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Deleted
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Registered: Apr 25, 2024 14:29:34 GMT -7
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Post by Deleted on Feb 14, 2019 22:18:19 GMT -7
Perfectly normal. And yes, brutal, but normal. Ha ha. That's why after owning motorcycles with wet clutches, you're not bothered my minor normal engine noises that other owners think their engines might explode. Ha ha. By the way, thicker oil exacerbates that issue. I noticed the opposite since I switched from 10/40 to 5/40. Another thing you can do is depress the clutch all the way to the handlebar, to open the clutch plates a hair more. I don't bother with any of that because I know it's not detrimental to the drivetrain, but you can minimize the noise that way.
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lastwish
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Registered: Oct 24, 2018 12:08:20 GMT -7
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Post by lastwish on Jul 9, 2020 20:24:25 GMT -7
I must agree I know its counterintuitive as hell but the clunk is 100% ok. Some talk about some revvmatching to smoothly engage first out of neutral but lmao this is how its designed to work its cool. Making sure your clutch cable is zoned up wouldn't hurt, and having the clutch disengagement set up to start early in the clutch lever pull ( a more stuntbike setup ) helps to ensure complete clutch disengagement when you shift. Most beginners and experienced guys prefer the clutch disengagement action deep in the lever and it sometimes leads to partial clutch engagement even with the lever pulled in all the way.
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Deleted
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Registered: Apr 25, 2024 14:29:34 GMT -7
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Post by Deleted on Jul 10, 2020 11:30:13 GMT -7
Well, you cannot rev-match from zero speed. Ha ha. If you rev the engine higher than idle, it'd only clunk harder. The only way to avoid the N-1 clunk is to 'road-speed-match', meaning the bike is rolling at the speed it'd be at 1,200 rpm in 1st gear, which would be about walking speed. But you can only do that if pointed downhill. And yes, the clunk is perfectly normal, and does no harm, even when the nasty noise suggests otherwise  . |
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lastwish
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Registered: Oct 24, 2018 12:08:20 GMT -7
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Post by lastwish on Jul 10, 2020 22:52:41 GMT -7
Yeah I know it mskes no sense to " rev match " or something like that into first out of neutral. Thinking back it was something I heard from 1 person years ago so it was just a looney theory he had.
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Post by rracerfz10 on Jul 12, 2020 20:25:33 GMT -7
The “clunk” is normal a lunge isn’t though. Have you checked your clutch cable? If it’s too loose the clutch won’t fully disengage and that IS bad for the transmission.
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Post by thefinn on Jul 13, 2020 13:32:56 GMT -7
Its normal. Ive gotten used to it, almost to a point of liking it in a standstill. I kind of "airbounce" my foot on the lever to get it in first and the clunk is kind of satisfying, haha.
But in false neutrals, especially if you were planning on accelerating hard, the sound is heartbreaking. I have to brace myself for it. I know rev matching helps in that situation but im not sure whats more humiliating, looking for the right revs in neutral or just getting over it and letting it clonk.
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