First 2023 Bonnie T120 Problem

The immobiliser light only flashes for 24 hours so if it was stood for longer it is normal for the light to stop. Can't explain the indicators though ?

 

I am a Speed Triple owner so not familiar with the T120 controls but the information should be in the Owners Manual that came with the bike.

 

As @TRIPLE X said the immobiliser light only flashes for the first 24hrs. Your problem with the indicators may be down to the wiring loom being over stretched at the headstock which can lead to fractured wires due to turning the handlebars from full lock to full lock. This has been a known problem for Triumph's modern Bonnevilles, although they claim to have revised the loom.

My Street Cup's indicators did the same thing as you're describing about six months from new, even though it was supposed to have been made with the improved loom fitted and therefore not covered by their product recall.

I went back to the dealers and gently but firmly ensured they knew I was aware of Triumph's harness problems and asked for a new loom (not a repair) under warranty, which they did without fuss.

Take a look at the main wiring loom on the left of the headstock (as you sit on the bike) and turn the bars from full left to full right and watch what happens. There may be some signs of the binding tape pulling apart or even exposed or broken wires. It has been know for some Bonnevilles to develop ignition / running problems due to the same design fault.

The scroll button trick that you've found is for Triumph's LED indicator sets that they offer as an accessory replacement for the normal incandescent bulb type indicators: It allows for the difference in resistance between a LED bulb and a normal bulb and adjusts the frequency with which the ECU flashes the indicators. If your indicators have failed due to broken wires, changing that setting will have no effect.

Hope that helps, while the bike is under warranty it's always best to involve the dealers.

Hope you can get back to enjoying the ride.

 

The documentation does exist, its in the instructions for fitting their Accessory LED indicators. Go to Triumph Instructions.com and type in the number for the accessory LED indicators A9838032; its all there.

Triumph won't publicise that sort of information unless necessary to avoid encouraging people fiddling with the set up of their bikes.

Triumph Instructions is a good place for information on how our bikes are put together. Triumph's modern classics range are all built very similarly, even if some parts are different (Triumph aren't going to reinvent the wheel with every model). So spending some time in the configurator pages of the Triumph website and trawling through the list of official accessories for the modern classics can mine out all sorts of useful info. Just put the part numbers into Triumph Instructions and download the instructions.

For example, I downloaded the instructions for the fender removal kit and the T100/120 grabrail and the combined information effectively told me how to swap my Street Cup fender, rear light and indicators for the T100 fender, rear light and indicators and so then be able to fit the T100/120 grabrail and removable rear rack.

Or, before I got my Haynes workshop manual I needed to know the torque values for the engine side casings. I looked up the instructions for the cover fixings kit and there they all are.

Hope that helps. Cheers

 

Mine’s a 2018.

I suspect 2020 onwards is when Triumph started building engines to Euro5 compliance as opposed to Euro4. On the 900 engined bikes you can tell the difference by looking at the No. plugs on the ECU, located under the saddle behind the battery; if there’s 2 then it’s Euro4 (like mine), if there’s 3 then it’s Euro5. 2020 is also when the 900 engines got an extra 10bhp.

I doubt there’s much difference in how a 2015 onwards water-cooled Bonneville is put together, so the Haynes manual will probably be fine in most situations. I don’t know if Triumph used the Euro5 change as an opportunity to upgrade suspension, brakes, or mechanical parts in the 1200 engines, if they did that’s where the manual won’t help.

Someone else with a 2020 or later T120 in this Forum like @learningtofly might know if Triumph changed anything crucial. You could also try your local dealer to see what upgrades may have been fitted to your 2023 steed.

Hope this helps.

 

You could use Triumph's online manual: triumphtechnicalinformation.com
It's a subscription service and the cost depends on how long you spend browsing. I have not used it for a while but it should not cost much for a quick look.

 

Just some refinements to meet Euro 5 and some new colours, so far as I'm aware. There's been some chopping and changing on standard items like cruise control, heated grips and centre stand; the latest model dropped the two latter for the former.

 

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