I have owned a 2013 EFI Speedmaster for 14 months . I bought it with 21,000Kms but a piston had picked up on one of it's bores . I took it to a Triumph specialist and he replaced the piston and honed the bore . Everything seemed good until I took it out and once it got warm after 3 Kms it stalled ! I have had the bike back to our local Triumph agents who diagnosed a faulty ECU , this I replaced recently but the fault is still there . The bike runs fine until warm , but then will cut out at a stop street or when running once warm . The filter and pump checked . Any one else had a similar problem or any advice would be welcome .
It sounds like the fairly common failure of the pick up coil that breaks down when warm.....the very fine wire winding breaks and expands with heat losing continuity. It also happens with ignition coils but as you have two it would manifest as a misfire rather than complete failure. Coils (pick up and ignition) fail more commonly than the ECU.
Correct they are Nikasil coated , luckily he was able to hone it out without going through the Nikasil coating !Thanks for the welcome .
While heat can be a cause of electrical problems, i am surprised to hear it said that this is a common problem with new Triumphs, not heard of this being a big problem with older electronic ignitions or other bikes, if heat was such a problem to things like pickup coils and coils ...coil on plugs on car engines would be reported more and they are not. Not saying your wrong just very surprised. On any EFI engine the first thing i would check if cutting out or running badly when hot is the ECU coolant temp sensor as a failure of this would cause a rich mixture condition default causing contaminated plugs and bad spark etc.
I said ‘fairly common’ you always get a disproportionate number appearing on forums because it is where people go for help. The bikes are intrinsically reliable.
@Callumity is correct with regard to the ignition pickup coil being one of the most common heat related failures on these bikes, followed by ignition coils. Running the older triumphs as I do i see it reported much more often on older models and whilst its not seen as often on newer bikes it is still one of the more common issues. Good luck with tracing out the fault, a new pickup coil will set you back about £50 from someone like Sprint Manufacturing.
While i am not disputing any of the suggestions given i am just pointing out other possible causes that are likely to be an easy and cheep fix, i learnt long ago that you should look at the simple solutions first...especially when it comes to things that are either not easily tested or not possible without specialized equipment, or just plain expensive to replace. A quick way to kill coils and igniters is to run them without earth IE plug cap disconnected or plug not earthed, this applies in particular to early ignition systems like Lucas or Boyer.
