T100 downshifting ‘klunk’ - Triumph Forum: Triumph Rat Motorcycle Forums
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post #1 of 18 (permalink) Old 11-05-2019, 12:18 PM Thread Starter
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T100 downshifting ‘klunk’

Looking to see if anyone knows about why my water cooled T100 has what feels like a ‘klunk’ noise while high speed downshifting from 2nd to 1st. This noise is also felt through the pegs...it feels as if the bike lurches forward a bit during the process.

It’s not the typical mechanical noise and feel of this bike.

It’s sporadic when it’s happening but it seems it’s in the initial stage of some sort of internal failure. Bike has 20k and is coming up in the end of warranty.


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Last edited by LA-Liquid-T100; 11-05-2019 at 12:20 PM.
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post #2 of 18 (permalink) Old 11-05-2019, 01:09 PM
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Well, can you clarify the statement "high speed downshifting"? Do you mean quickly?

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post #3 of 18 (permalink) Old 11-05-2019, 03:03 PM
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From my experience, the shift from 2nd to 1st is best made while almost at a complete stop and close to idle rpm. I have found harsh shifting into 1st from neutral above 2000 rpm and down shifting from 2nd to 1st with speeds over 15 mph. I suppose the harshness could be described as a hard klunk, but no lurching.

The lurching could be a sign that your clutch cable needs to be a adjusted. Possibly there is too much slack causing the clutch to not fully disengage during shifting.
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post #4 of 18 (permalink) Old 11-05-2019, 03:39 PM
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I don't think I've changed down from 2nd to 1st at anything more than walking pace never mind at "high speed".
Even then I'd be blipping the throttle in between to match the engine speed.
But as said already check your clutch adjustment.
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post #5 of 18 (permalink) Old 11-06-2019, 02:27 AM
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I don't think I've changed down from 2nd to 1st at anything more than walking pace never mind at "high speed".

Even then I'd be blipping the throttle in between to match the engine speed.

But as said already check your clutch adjustment.
Same here. Why do you ever require first when in motion except for pulling away or on a race bike with high gearing. Last time I used it on a bike it was 1979 and a fs1e

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post #6 of 18 (permalink) Old 11-06-2019, 03:18 AM
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It depends on where you ride, to be fair - I ride dail in London and regularly drop down to first when filtering or approaching junctions where timing will get you across without stopping. Second starts to bog below 18mph, and a good proportion of London riding is below 20, so I change down to first while moving quite often.

It’s not changing down at high speed though...
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post #7 of 18 (permalink) Old 11-06-2019, 03:21 AM
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It depends on where you ride, to be fair - I ride dail in London and regularly drop down to first when filtering or approaching junctions where timing will get you across without stopping. Second starts to bog below 18mph, and a good proportion of London riding is below 20, so I change down to first while moving quite often.



It’s not changing down at high speed though...
Are perhaps I will bump into you some time between Heathrow and Shoreditch then but after April as I've given up commuting in the winter.

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post #8 of 18 (permalink) Old 11-06-2019, 06:01 PM Thread Starter
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Well, can you clarify the statement "high speed downshifting"? Do you mean quickly?

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I tend to ride a little fast on my bike... I keep the revs up to power out of traffic. In LA we split lanes so like it’s mentioned above, you want to have the ability to quickly get on with it.

I appreciate the input but so far looks like nobody has experienced the same. It’s definitely not normal. It’s a very solid, “something is slipping” internally, enough to feel it in the pegs. I will take it to the dealer next week but have the suspicion that they won’t find anything wrong.


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post #9 of 18 (permalink) Old 11-06-2019, 06:07 PM
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Quote:
Originally Posted by LA-Liquid-T100 View Post
I tend to ride a little fast on my bike... I keep the revs up to power out of traffic. In LA we split lanes so like it’s mentioned above, you want to have the ability to quickly get on with it.

I appreciate the input but so far looks like nobody has experienced the same. It’s definitely not normal. It’s a very solid, “something is slipping” internally, enough to feel it in the pegs. I will take it to the dealer next week but have the suspicion that they won’t find anything wrong.


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If you're down shifting into 1st at any speed over a slow walk, of course it's going to be an issue. I think the bike has a slipper clutch that keeps the rear wheel from locking up. I live in Las Vegas and visit S California, and I lane split when there. I've never needed to downshift to 1st while moving.

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post #10 of 18 (permalink) Old 11-07-2019, 04:02 AM
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I'm sorry I commute hard in traffic and again only every need to change into first if coming to a stop and the traffic moves again always walking pace. There is a reason why neutral sits between 1st and 2nd. I would try adopting a different riding style before assuming the bikes playing up

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