https://m.imgur.com/gallery/QFBZHTO Problem solved! Thanks everyone for the tips. Problem was the ignition coils. Just changed all three and problem gone! I bought three PVL copy coils from Sprint Manufacturing. First i was little suspicious, but i got this e-mail from them: " We have sold several hundred of these Taiwanese coils (single and twin outlet) and only very recently had a failure on x 1 single (USA) and x 1 twin (Sweden). I don’t think the PVL coils are any better than this, but they were original equipment on Triumph at one time. All types in stock so choice is down to you. Regards, Trev." I did small ride and everything looking good. Idle is nice with warm engine. So if you own hinckley 3 cylinder and these symptoms sound familiar, you know what to do.
I make pecil coil coversion kits for t3 models. Plug and play inc looms. Only 12v into plug cap/coil, no plug leads.
Only just seen this but the OP described classic Gill ignition coil failure. You get a low speed misfire (less than 2-2,500 rpm) spit on one cylinder and it can be hard to detect which - especially with balance pipes. It then gets progressively worse if you are slow to suss the culprit. The very fine wire in the coil breaks and loses continuity as it expands with heat. At higher revs and marginally higher voltage it jumps the gap just as it does in the spark plug.
Hi Sami.l How are you finding the new coils from Sprint manufacturing? I think it's time I replaced mine, not so much because of idle issues (although low revs can be lumpy at times), but because the tacho is reading wrong. Did they solve that problem for you? I'm sure I read somewhere that the rev counter gets its reading from one of the coils......
Exactly the same symptoms on my 2003 Thunderbird 900. I swapped the Gill coils for PVL and its run perfectly for the last 3 years
Exactly the same symptoms on my 2003 Thunderbird 900. I swapped the Gill coils for PVL and its run perfectly for the last 3 years
