Originally Posted by Ten Thrty2
Respectfully requesting some help guys, I dont know where to start on this one.
2007 Thruxton, AI Removed, Air box removed, predators fitted and rejet.
Bike idles great and runs strong, however after she's warmed up idle increases from 1050ish to closer to 2K also possibly unrelated but thinking that its not I can feel it almost cough or hiccup and nearly stall and sometimes stall, I feel it cough through the POD filters near my legs, both at the same time.
My thoughts are ignition but Im wondering if I need to go down a size on the idle jets?!?
I was experiencing the same issue. While idling after warming up, my bike would cough/hic-up while sitting at a stop. It would come close to stalling, but only stalled once. Started back up without an issue.
Only now, once I start the bike, let it warm up so the engine is hot to the touch (usually a couple minutes), I shut the choke, give it some RPMs, but if I hold the RPMs between 2000-3000 RPMs, the engine starts to misfire. Like a clicking noise. After replacing the intake boots, clamps, vacuum caps and “O” rings on the intake manifolds mounted to the cylinder head, I’m fairly certain that I’ve been able to eliminate the possibility of a vacuum leak. This then directed me to start troubleshooting it as potential ignition problem. After testing with a spare coil and igniter and still experiencing the same issues, I've now placed an order with my dealer for a new pick-up coil. Once that comes in next week, I’ll get it installed and see where that leave me.
Everything circled in red is what has been replaced to date:
Like you, I’ve got AI Removed, Air box removed, predators fitted and rejetted. Not sure how you’re jetted, but I’m at 150 mains, 42 pilots, no shim under needle with air mixture screws at 2.5 turns out.
My issue started after I had my bike in for it's 12,000 mile service. I know at the time our bikes were manufactured the recommended gap on the pick-up coil was 1.0 mm +/-0.20 mm but was changed to 0.8 mm at some point during production due to warranty issues. So in my case, I'm wondering if the service technician simply reset my gap to the old factory specs. I'm going to crack the side case and check the gap but figured I should go ahead and order one now incase I need to replace it. If I don't, then I’ll have an extra for when/if I do need it.
This is the technical note sent out from Triumph: "Affected Models: Bonneville/T100, America, Speedmaster, Thruxton and Scrambler.
Should a bike (see above) demonstrate faulty ignition coil type symptoms (most commonly an engine misfire), please initially check and adjust the ignition pick-up (IPU) air gap (we recommend an air gap of 0.8mm).
Since changing the IPU air gap in production to 0.8mm, we have had no ignition coil warranty claims."
Here’s the video I shot of the issue I’m now experiencing. Because of this, I haven’t even been able to ride the bike to determine if it’s still coughing or hic-up’ing. But I’m assuming it’s all related and due to my pick-up coil on one way or another.