Author Topic: Intermittent gear shift sticking a  (Read 644 times)

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Offline Ukwes

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Intermittent gear shift sticking a
on: 10 September, 2021, 03:17:47 PM
On the way back from a week touring Wales, and the gear shift started getting stuck in position and not returning to engage the next gear.  Initially I could change from 2nd to 3rd then, couldnít change down from 3rd.
Stopped by the roadside, and consulted some threads on here regarding detent bearing and shift spring, and decided could do nothing.
Road home 200m, mostly motorway but gear change was fine. Got within 1m of home and gremlin struck again, couldnít go from 5 to 6, then further down than 4th.
Removed the casIngs and clutch basket, and spring and bearing looks ok, now changing gear fine in the garage.
Havenít pulled the shift shaft yet.



Any advice what to look for apart from broken spring?
Other bikes: 2010 Street Triple R,  ZXR 400 race bike for track days and Husqvarna FE350 for green lanes, a Husqvarna 701 Enduro for TET and a Yamaha TDR250 for investment fun

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Offline Ukwes

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Re: Intermittent gear shift sticking a
Reply #1 on: 10 September, 2021, 03:20:55 PM
The picture doesnít show too clearly but the shift spring has both upper and lower extensions, and both feel good if prised with a screwdriver
Other bikes: 2010 Street Triple R,  ZXR 400 race bike for track days and Husqvarna FE350 for green lanes, a Husqvarna 701 Enduro for TET and a Yamaha TDR250 for investment fun

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Offline Ukwes

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Re: Intermittent gear shift sticking a
Reply #2 on: 10 September, 2021, 03:26:14 PM


Spring intact
Other bikes: 2010 Street Triple R,  ZXR 400 race bike for track days and Husqvarna FE350 for green lanes, a Husqvarna 701 Enduro for TET and a Yamaha TDR250 for investment fun

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Online Sidewinder

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Re: Intermittent gear shift sticking a
Reply #3 on: 10 September, 2021, 08:15:26 PM
Does the detent bearing spin freely?

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Offline Ukwes

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Re: Intermittent gear shift sticking a
Reply #4 on: 10 September, 2021, 08:50:51 PM
Yes, and with the detent also removed the gear selection sometimes sticks between 3rd and 4th

Iím thinking the engine needs to come out and crank cases split to find out whatís wrong.

Itís a 66plate Sport with 12.5kÖnever had an issue before
Other bikes: 2010 Street Triple R,  ZXR 400 race bike for track days and Husqvarna FE350 for green lanes, a Husqvarna 701 Enduro for TET and a Yamaha TDR250 for investment fun

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Offline ZuluTiger

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Re: Intermittent gear shift sticking a
Reply #5 on: 10 September, 2021, 09:03:27 PM
And, you've excluded any issues in the shifter linkage?? Or a bent lever, etc.?

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Offline Ukwes

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Re: Intermittent gear shift sticking a
Reply #6 on: 10 September, 2021, 10:32:50 PM
Yes, without the shift shaft and detent, the gear selector still gets stuck on some gear changes, sometimes they go fine, other times it just wonít change
Other bikes: 2010 Street Triple R,  ZXR 400 race bike for track days and Husqvarna FE350 for green lanes, a Husqvarna 701 Enduro for TET and a Yamaha TDR250 for investment fun

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Offline sax_000

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Re: Intermittent gear shift sticking a
Reply #7 on: 11 September, 2021, 11:07:50 PM
Check that the ball joints in the gearshift linkage are tight.
This was a "classic" problem with the earlier T1050s

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Offline indytiger1050

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Re: Intermittent gear shift sticking a
Reply #8 on: 12 September, 2021, 02:13:10 AM
 :462:

Had mine fall off mid ride. Ended up grinding down a spanner to get a decent grip to tighten up.
Support the forum.   :031:

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Offline Puccio

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Re: Intermittent gear shift sticking a
Reply #9 on: 12 September, 2021, 08:07:35 PM
*Originally Posted by Ukwes [+]
Yes, without the shift shaft and detent, the gear selector still gets stuck on some gear changes, sometimes they go fine, other times it just wonít change

Hi mate,
by design, there's no way a motorcycle gearbox could reliably shift from first to sixth gear and vice versa when both shafts are not rotating: this is due to the shape of mating dog teeth, it's impossible to force them to engage if they aren't aligned.

When at least one of the two shafts is in motion, then one of the two engaging gears is also moving relatively to the other, so there will always be an instant in time when dog teeth will align and the shift could be completed.
You can verify this by repeating your experiment while slowly rotating the rear wheel by hand.

If you only experienced the shift lever getting stuck and not returning to center, then it's very unlikely you'll find a damage inside the gearbox.