Speed Triple Gearbox Problem.

Just a quick note to explain a problem I have encountered over the past week.

Background info: Went for a ride and nothing untoward with the bike, on the way back I had problems selecting gears 3&4 and could eventually could not select the other gears without cycling up and done the gearbox until I found one. There were quite a few neutrals whilst trying to find a gear.

After some research I found out that there was a recall for the 'Detent Arm Spring' and 'Neutral Switch Washer' DVSA Ref: RM/2013/012. None of these applied to my bike so i had to do some old fashioned fault finding. I spoke to Triumph UK headquarters and they pointed me in the correct direction.

Once I'd stripped the right hand side engine cases off I found that the Detent Arm Roller has become detached! Triumph part number: T1190275

The loose part had found it was into the sump....luckily!

Removed the sump to fish out the lost/detached part and ordered a new part!

Once I find out how to get the picture from my phone to this site I can share them!

 

Think I've found how to do it:
Picture 1: Detent lever in resting place and missing bearing.


Picture 2: Detent lever with spring removed and missing bearing.

Picture 3 : Removed Detent lever (front)


Picture 4: Removed Detent lever (reverse)

 

My bike is a 2012 with just under 10k on the clock! Im not a hard rider so I cant understand why this has happened.

 

I have decided after talking to Triumph and not feeling very confident ( they say that the bearing post is a press fit! ) that the arm I have will be repaired/modified before refitting. I have pressed the bearing post back into the arm and it does not seem to be held in with anything more than an interference fit. I will be peening the ends over and if not happy I will be welding it into place. Luckily I'm and Aircraft Engineer so have access to some very good delicate welders at work!!!

I will post the results when all the work is done, hopefully this week and before I miss out on all the good weather!!

 

I managed to get the bearing post welded at work and there is NO way that it can come out now.
As you can see work made a very good job of the welding. We were limited by the thickness of the metal and not being left with a 'Blob' of weld.

Just awaiting for the new gaskets and clutch nut from Triumph and I can put it all back together again.

 

Parts arrived Sat so its all back together. Took it for a test ride Helston to Minehead via Exmoor and back via Dartmoor (300 miles plus). All worked brilliantly and gear changes smoother than a well talced babies bum!

 

I had the same issues with false neutrals before I had problems selecting all gears. Not saying it is this issue but I know some of the bikes has a recall on the spring connected to the lever I repaired. Triumph UK HQ were very good at informing me if I had any recalls due or if there had been any carried out on my bike.

If you have access to a 'boroscope' you can go in through the oil filler/dipstick hole and see inside. Behind the clutch basket is where the detent lever sits. It will be very obvious if the roller has become detached.

If it is the detent lever i can talk you through the process of removing and repairing the lever if you dont have a Haynes manual. The only specialist tool (Home modified spanner) needed is a bent 8mm spanner to remove a bolt from the rear of the sump.

 

In my experience if it was the detent lever issue you would not only have the false issue downshifting but also upshifting! I would guess that the detent lever is fine.

Save yourself the hassle of stripping the bike and look at a more common/easier fault than a detached detent lever!

There are threads about the type of oil used ( on other triumph sites) about problems shifting gear problems. I used Motul in my bike and ut seems a lot smoother than the Castrol that was originally used. could be coincidence though!