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Old 07-29-2012, 02:30 AM   #1 (permalink)
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2012 Sprint Gt 1050 - Gearbox problems

Hi all
Firstly let me apologise if this has been discussed elsewhere, i did hunt through quite a few pages first but couldnt find anything
The problem I have been having is the gearbox on my brand new Sprint, its jamming in first, (have to re clutch to get it to move, kinda awkward cos when you let the clutch out back wheel locks up), also it is very "klonky changing gears.
I have only done 800 kms on it, it is currently in the dealers and they say triumph are going to replace the box, but have concerns this isnt going to fully resolve the problem.
Anyone else come across this?
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Old 07-29-2012, 07:00 AM   #2 (permalink)
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These machines have very tight gearboxes and use straight cut gears and are very robust and take a lot of kms to break in.


The gearboxes are solid and of high quality.

Most likely your clutch lever or gear shifter lever are not adjusted correctly. I would be very surprised if the g'box is at fault, I have been here almost 8 years and do not remember that on a brand new bike ever.

cheers
Dave
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Old 07-29-2012, 07:02 AM   #3 (permalink)
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For the gearbox to be replaced on a new Sprint would be rare in the extreme.

But having it at the dealers is the best place for it right now.
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Old 07-29-2012, 11:26 AM   #4 (permalink)
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Dave speaks the truth my GT has 2500 miles and the gearbox/shifting is finally breaking in.
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Old 07-29-2012, 11:50 AM   #5 (permalink)
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Quote:
Originally Posted by pte831 View Post
they say triumph are going to replace the box, but have concerns this isnt going to fully resolve the problem.
Anyone else come across this?
I think your dealer is doing the right procedure for you.
There is no sense in dancing around a possibly mis-assembled transmission and having the operator hurt.
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Old 07-30-2012, 05:21 AM   #6 (permalink)
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ok, thanks guys, yeah have no problems with the dealers they have been more than helpful, was just a nagging concern that is was more than just my bike.
good to hear positive comments, am really looking forward to getting it back, its an awesome machine.
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Old 08-02-2012, 05:37 AM   #7 (permalink)
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I have been having the same issue. It is intermittent. I'll have a day where everything is shifting fine and then the next days it will not want to shift from first to second. Preloading my shift seems to help. I just know this can't be right. I took it to the shop for its 6k mile maintenance and described the problem in detail. The mechanic adjusted the cable, which I have tweaked repeatedly to try to relieve the problem, and said he can't reproduce the problem. He says this is just the way they shift. This is really frustrating as I love this bike with the one exception of the way it shifts.

Any suggestions on what to do next?
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Old 08-02-2012, 07:26 AM   #8 (permalink)
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If you do regular oil changes with good quality oil and your clutch and shift lever are adjusted correctly you should not have any problems.

You may need to look at your shift lever if your mechanic says it is fine and you are having a problem.

The Sprint gearboxes do not generally give trouble.

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Old 08-03-2012, 06:35 AM   #9 (permalink)
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Ok. I got my bike back from the shop. They really tuned it up nicely. The shifting now, while seemingly tighter, is very consistent across the range of gears. So I will wait and see.

But man, I really love this bike. It is about an hour ride back from the shop and it was an hour of finely engineered joy
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Old 08-07-2012, 06:46 AM   #10 (permalink)
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Wonder why the gears are straight cut ?

Quote:
Originally Posted by DaveM View Post
If you do regular oil changes with good quality oil and your clutch and shift lever are adjusted correctly you should not have any problems.

You may need to look at your shift lever if your mechanic says it is fine and you are having a problem.

The Sprint gearboxes do not generally give trouble.

cheers
Dave
Dave I wonder why the gears are straight cut.

Aren't lots of gearboxes angle cut and quieter ?

They are certainly a solid sounding and reliable box, but many reports indicate the japs are better....wonder if they have angle cut gears.

got the answer...here 'tis

For anyone interested: Note how reverse gears are straight cut and the forward gears are helical cut. This is to allow the reverse idler gear to slide into mesh, if they were cut at an angle(helical) they would not slide into mesh. Anyone notice why reverse sounds different than driving forward? Well thats how, because of the straight cut gears. Race cars use straight cut gears because they are more efficient at putting power down. Helical gears are a lot quieter than straight cut gears.
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Last edited by armarra; 08-07-2012 at 07:00 AM. Reason: found my answer..
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