Bonneville Won't Start

Sounds like you need to take it to a dealer and check the electronics.I’d be careful about running it with the warning light on,but it could be a glitch that can be sorted by the dealer.

 

If you've had it on tinder it's the negative energy of someone elses nightmare

 

Free is good.

 

What year is the bike. If it the later EFI try the three 12 minutes starts and usually the bike resets itself.
Joe.

 

OK Will, we may be getting somewhere.

The crank position sensor (cps) is an electrical coil that sits under the triangular right hand engine cover. It feeds a signal to the ECU via a thin black wire that runs up behind the right hand side cover to a connector adjacent to the battery.

As the engine rotates the cps sends a pulse every half rotation that triggers the ECU to chop power to the coil. That collapses the magnetic field in the coil which induces the high voltage which races down the lead to the plug, jumps the gap and ignites the fuel.....

The coil itself is a very fine winding and notoriously fragile. The wire can crack and you may get intermittent performance before it fails completely. The later bikes were all correctly gapped from the factory at .8mm.

You need
https://www.fowlersparts.co.uk/parts/view/T1296505

plus the gasket.

About $75. You need to tilt the bike well over onto its side stand to avoid losing oil.

 

......self evidently check the connector near the battery first and, if you have a multimeter, check the resistance between the two wires. You are looking for about 570 ohms although that is not 100% guarantee it is not faulty.

 

Guillermo salinas.
you seem to be having mares with the steed. the 12 minute runs consist of if you can start it let it run 12 minutes on tick over till the fan kicks in then let it cool a little and repeat then what I usually do is pop out for spin around 12 minutes. the engine light usually resets. But do check the wires first. Look at all the kill switch's Like i said before you can test those switch's by shorting them out. They can be beggars to find if they work correctly or not. Check the ignition wiring and plugs are not corroded. I do hope this helps some.
Joe

 

Guillermo Salinas.
Think its time to get this bike into the dealer and let them sort it out.
Joe.

 

Or start here:

https://haynes.com/en-us/triumph/bonneville/2001-2015

 

Remove a nut? Bolts removed, the side cover may need hitting with a soft mallet and something to protect the finish. Your magnet won’t work on alloy!
No soft mallet! Use a piece of 2x4 against the cover and hit the wood with the hammer.
Take care. It will suddenly drop off.

 

I see no rust only a light film of oil.....

Start with the sensor at the bottom and replace it. Leave the old one where it is (but disconnected) The gap between the sensor head and engine is .8mm.

Then feed the new wire up parallel with the old until you plug it in and remove the old sensor completely.

Visually check everything then bolt up. I assume you will have carefully cleaned the mating faces between the engine and the cover before applying a very thin smear of gasket sealant to the job. You can use it to hold the gasket in place on the small locating studs before fitting the cover itself.

It’s all in the book!