Question about Triumph Bonneville Motorcycles

1 Answer

Coils are hot to the touch

Mild resporation on t120 bonneville. thought I had it when A. it wont start, and B the coils are hot to the touvh.... Appears to be wired correctly/per mannual....

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Brigadier General:

    An expert that has over 10,000 points.

  • Master
  • 6,966 Answers

Hi and welcome to FixYa,

Offhand, am not familiar with a T120 Bonneville. However to my knowledge, there would only be 2 possible reasons why the ignition coil would heat up as you described:

  • the - terminal of the coil is wired to the ground; or
  • the CDI/igniter is shorted or in older designs, the contact point/condenser is shorted to the ground. On the contact point, it is also possible that the gap is erroneously set that it would appear to be shorted to the ground.
Good luck and Thank you for using FixYa. Happy Holidays.

Posted on Dec 21, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

2007 bonnevelle america..runs for 15 minutes ignition cuts out wont start then 2 hours later starts.Changed coils and wires.Same problem .Where to look next?


Hi, Randy sounds like shades of Lucas Electrics the undisputed Prince of Darkness I would remove the tank again and meticulously scan all electrical connections and pay particular attention to signs of corrosion loose pins inside connectors etc. otherwise the usual suspects are:
1. Severely discharged or a damaged battery, should have 12.5 volts or better and be able to pass a load test if necessary.
2. Failed alternator/generator and or voltage regulator.
3. Loose or corroded battery terminals and or cables especially the "NEGATIVE" cable, look for loose, corroded, or broken connectors inside the cable harness at "BOTH" ends.
4. Failed main circuit breaker or ignition switch, check for loose connections and continuity.
5. Failed system and or ignition relay, check for continuity.
6. Failed ignition coil, ignition/electronic module.
7. Failed CKP, CPS, CMP, MAP, TPS, or BAS sensor, corroded, loose or broken wire connector pins/sockets.
8. Throttle cables and or idle speed improperly adjusted hot idle speed should be 950 RPM to 1000 RPM.
9. Air/fuel mixture screw improperly adjusted.
10. Accelerator pump damaged or not working.
11. Water or dirt in the fuel system, carburetor or filter.
12. Restricted, blocked or kinked fuel line.
13. Fuel tank empty.
14. The gas cap is not venting properly or fuel tank venting system blocked.
15. A failed fuel pump, pressure regulator and or fuel injectors.
16. Vacuum line from intake manifold to petcock broken, cracked, or not attached, carburetor vent line plugged.
17. Needle and seat stuck closed in the float bowl.
For more information about your issue and valuable "FREE" downloads that you need please click on the links below. Good luck and have a nice day.
Triumph Bonneville Ignition Control Unit CDI Limiter Failure
2005 bonneville t100 wont start no spark dies
Triumph Quit Ignoring Your Ignition Problems
Triumph America Handbook

Sep 22, 2016 | 2003 Triumph Bonneville America

2 Answers

Triumph T120 1968 spark problems


Hi, I would suspect that the dual coil is the problem, normally on the Bonnie you have a spark every other stroke. Because the engine is a parallel twin (both pistons go up and down at the same time) you are firing both plugs every time the pistons are on the ignition stroke. This is why you get a shock the HT has to go somewhere and you are releasing this to the frame when you take out a plug. Dual output coils are really designed for 4 cylinder bikes where the second spark can be lost during the firing cycle. Most old Honda's CB400/500/550/750 used the dual coil ignition system. You need to have a coil for each plug as you had before. Hope this helps

Mar 07, 2015 | Triumph Motorcycles

1 Answer

Bike wont start changed coil still wont start


Hi..are you getting any power to the coil wires...that plug into the coil..just a thought..Im us to Yamaha, but same difference..Give me the whole story on this bike maybe I can come up with something...

Apr 20, 2014 | 2000 Harley Davidson XL 1200 C Sportster...

1 Answer

When I ride my bonneville it runs fine even from cold but when it is hot when I stop at junctions and move off it missfires on the left cylinder for a while then it's ok.Could it be the coil?


most likely its a coil since when they get hot and underload that is when they may miss you can check this with a spark lod tester they are not that expansive only about 10 dollrs at your locale auto zone, just load that ciol and see if it fails...

Nov 09, 2009 | 2001 Triumph Triumph Bonneville

1 Answer

Triumph Bonneville T120 oil pressure issue


The oil pressure on a new engine is:

Idle is:  20 - 25 psi
Full pressure is 68 - 80 psi.

Pressure switch operates at 7-11 psi.
The pressure switch could be faulty.

Pressure when hot may be very low
and  if it is returning oil to the tank
that is a good sign it is still pumping.

Aug 19, 2009 | 2004 Yamaha V Star Classic

1 Answer

Gsxr1000 wont start in hot wheather


coils when begining to go bad can cause that problem.check the spark when cold. and after it gets hot and wont start, check the spark again, if its a weaker spark or no spark, its likely the coils. you can pull the coils off and take them to get tested.

Apr 27, 2009 | 2001 Suzuki GSX-R 1000

1 Answer

2002 bonneville no spark


try here mate you may find what your after

http://www.manualz.info/


hope this helps

Dec 06, 2008 | 2002 Triumph Triumph Bonneville

Not finding what you are looking for?
Motorcycles Logo

Related Topics:

340 people viewed this question

Ask a Question

Usually answered in minutes!

Top Triumph Experts

Arnie Burke
Arnie Burke

Level 3 Expert

4481 Answers

yadayada
yadayada

Level 3 Expert

61292 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21949 Answers

Are you a Triumph Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...