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YBR125 getting stuck in neutral


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Hello peeps!

Background: Car driver for 11 years, have rode a motorcycle on 4 separate occasions now (CBT, lesson, two rides of my own bike).

My 2006 Yamaha YBR125 is being a bit of a pain in the rear when changing gear (see what I did there?) - to go from first to second it will sometimes get stuck in neutral. Double declutching (letting the clutch out, and then pulling back in) sometimes helps, other times I have to come to a stop, and fiddle with the lever until it finally decides to go into a gear. This is particularly annoying when pulling out of a junction, and going up a hill - getting half way up and having to pull over because it's just not happening (although it let me practice a hill start :P)

It will also go from first, into second - pull whilst maintaining the throttle, but then when the throttle is released it'll slip back into neutral. I have *double checked* i'm not resting my foot on the lever at this point (I originally thought this, so lowered the shift lever a bit, which has done nothing except make it difficult to get my bleeding foot under it...

The other gears seem ok - and when on the center stand it will shift through the box the majority of the time ok (releasing the clutch every time - you hear a little "clunk" as the clutch engages).

 

My plan for tomorrow is as follows:

  • drain and replace engine oil (I don't know 100% what oil is in it - it was freshly replaced by the seller a month ago) with 10W40 motorcycle specific oil
  • double check chain slack (although I checked this not long ago and it was between 20-30mm)
  • double check clutch cable free play - it does fully disengage when the lever is fully in
  • check the shift lever is in the right position

Is there anything else I should check for/do? I am aware i'm a new rider and so some of this may be technique - hence why I found a straight and double checked that it was dropping back to second of it's own accord. Once it is in second, it will stay there (and shift back to first/neutral fine and generally behave itself).

Edited by sparxooo
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Honestly, ride it.

Motorcycle gears can be tricky to sus, my vmax can sometimes catch me if i go from 1 st to second too slowly when crawling in traffic.

You will learn to give it a nice clean flick rather than a push. Sounds odd but when it clicks you will understand.

YBR125s are legendary for being all but unkillable, i have personally been alongside an SR125 (same motor) at 80mph (slight downhill), considering the gearing was stock god only knows what the rpms were, that bike had over 80k miles on it.

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46 minutes ago, Cynic said:

Honestly, ride it.

Motorcycle gears can be tricky to sus, my vmax can sometimes catch me if i go from 1 st to second too slowly when crawling in traffic.

You will learn to give it a nice clean flick rather than a push. Sounds odd but when it clicks you will understand.

YBR125s are legendary for being all but unkillable, i have personally been alongside an SR125 (same motor) at 80mph (slight downhill), considering the gearing was stock god only knows what the rpms were, that bike had over 80k miles on it.

So far i've ridden around my estate, and up to a car park to practice - on the way is when I really noticed it playing up and also in the car park - so ended up riding around in 2nd and just using the clutch (great for practicing clutch control!) most of the time, including pulling away in 2nd, and figure of eights in 2nd too. I just don't want to use 2nd for everything and get lazy on the gear changes for when I go to a bigger bike (if).

Points taken on board - i'll still check everything tomorrow and the clutch cable adjustment - but plan for another ride tomorrow eve when it's quietened down.

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Just to add info from todays ride:

Keeping upwards pressure on the lever whilst letting the clutch out makes changing 1st - 2nd work 100% of the time. 2nd-5th works 99% of the time (more my technique maybe letting me down here) without holding the shifter up/down.

2nd - 1st is much more difficult - it feels like you're at the bottom of the box, even keeping slight pressure on the lever before bringing in the clutch doesn't help it. Once at a standstill, it'll sometimes go to 1st, or then go to neutral / a false neutral - a slight sharp tap on the lever then will make it go into 1st - but it will most of the time NOT do this whilst moving, and you will have to stop fully / rock the bike.

Edited by sparxooo
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Remember there are no syncros on a bike. The gears locate on dogs not splines. 

When the gears are loaded they naturally want to stay in place. It's what stops it jumping out of hear. 

1st is rarely if ever changed into while riding. 

When you change to second you are changing up 2 gears effectively. (n is a gear position). 

This change takes time. Breif granted but if you are not going very quickly the momentum you lose will stop the gear engaging properly. 

Biggest piece of info. 

Don't worry about looking a tit! Stalling or any of the other possible cock ups available. You will do it. Now way round it. Just ride. People have crashed thinking they have to be perfect. 

If you started learning Russian, could you be fluent in a couple of hours. 

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On 9/14/2020 at 12:43 PM, Cynic said:

Remember there are no syncros on a bike. The gears locate on dogs not splines. 

When the gears are loaded they naturally want to stay in place. It's what stops it jumping out of hear. 

1st is rarely if ever changed into while riding. 

When you change to second you are changing up 2 gears effectively. (n is a gear position). 

This change takes time. Breif granted but if you are not going very quickly the momentum you lose will stop the gear engaging properly. 

Biggest piece of info. 

Don't worry about looking a tit! Stalling or any of the other possible cock ups available. You will do it. Now way round it. Just ride. People have crashed thinking they have to be perfect. 

If you started learning Russian, could you be fluent in a couple of hours. 

You're right - I know i'm only early in my riding career!

Adjusted the clutch cable again today, replaced the perch as the mirror thread was damaged and the adjuster was a bit wobbly (pretty sure the bike has been dropped onto its left side previously). Tightened the mid-cable adjuster so there wasn't so much adjustment needed at the handlebar end - at the lever I wound the adjuster out until the lever had no free play, then wound it in 1/2 a turn which left about 10mm free play.

Ride out to the car park where i've been practicing - perfect. Gears selected fine all the way there. Being a bit more positive on the lever now. The clutch bite point has now changed (obviously), and is taking some getting used to. Going all the way through the box, slowing and going 2nd to 1st, working fine.

15 minutes later after arriving - 2nd -> 1st and 1st -> 2nd is doing it again...

12-15 mile ride planned for tomorrow, so will see how it goes! :P 

Edited by sparxooo
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