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This a reponse from a contributor of the TriumpmTalk forum.Seem pretty good to me, what do you guys think, it also agrees with ervdrvr1, thanks.
Your Trophy is displaying the classic symptoms of a crankshaft position sensor / pickup coil gone bad (Triumph part # T1290022 / price around $67-68.00 USD)
It will fire-up and run until it gets hot and then no-go.
Once it cools down, it fires up again and runs until hot.
Place bike on sidestand (NOT the centre stand) so that expensive synthetic oil won't run out on the floor.
Remove the right side fairing.
Remove the round crankshaft side cover from the lower engine (7 , 8mm nuts)
You'll see a wire entering from the rear going to a small plastic module...remove the module.
Replace the module with a new one.
The hardest part is tracking the wire back to the plug since it's wire-tied to the frame.
Once replaced, you'll be good again for thousands of miles.
Just be careful that you don't damage the gasket under the cover so you can reuse it which normally isn't a problem doing.
When replacing the sensor (2 - T30 Torx) you'll need to set the air gap between it and the crankshaft at it's closest point to a range between 0.6 and 0.8 mm. I recommend about halfway between those numbers to allow for expansion and contraction.
If you want to CHECK if it's bad first, disconnect it at it's plug and use an ohmeter between the two leads...it should be 530 ohms plus or minus 10%.
But trust me, it's gone bad for sure!
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