Question about 1972 Triumph T 100 R

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What type of spark plug does a 1971 triumph bonneville take?

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NGK B8ES
Champion N3
Lodge HLN
KLG FE100
All have 14mm thread diameter & 3/4" reach
Gap is 0.025" (0.64mm)

Ride safe
Bike-Doc
Please mark this as very helpful (if it has been!!)

Posted on May 01, 2010

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If you want to use bosch the number is WR7CP (I had the best luck of all plug with these, as my bonny was pumping some oil before rebuild.. hope this helps

Posted on May 08, 2010

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Hi, I have a 1971 O.I.F T120R Triumph Bonneville.....it's sluggish when pulling away and the left plug is wet ?


the left plug problem indicates where the fault is
if you have duel carby , check for flooding in that carby

Apr 23, 2018 | Triumph Motorcycles

1 Answer

2005 Triumph Triumph Bonneville no spark


Hi, Michael and the usual suspects are:
1. Fouled spark plugs.
2. Severely discharged or a damaged battery should have 12.5 volts or more and be able to pass a proper "LOAD" test if necessary, you may have a preliminary reading of 12.5 volts or more but little or zero amperage the battery is faulty and must be replaced, AGM batteries fail in this scenario more so than lead-acid batteries.
3. Check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
4. Loose connection at ignition coil or plug between ignition sensor and module.
5. Spark plug cables in bad condition, shorting/leaking, spark plug cable connections loose check for spark leakage in the dark.
6. Faulty ignition coil or electronic control module.
7. Faulty pulse coil.
8. Faulty CKP, CMP, or BAS sensor.
9. Faulty ignition switch.
10. Faulty run/off switch
11. Tilt sensor needs a reset.
12. Security alarm failing to disarm needs reset
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
No Spark Triumph Forum Triumph Rat Motorcycle Forums
How to diagnose no spark situation on motorcycle
Triumph Scrambler 2006 Model No Start No Spark video 1 FIXED Triumph Bonneville 2001 2007 Workshop Service Repair Manual Download... $15
https://www.bikebandit.com/oem-parts/2005-triumph-bonneville-t100/o/m147321
Triumph Bonneville Owner Handbook Manual

Mar 25, 2018 | 2005 Triumph Triumph Bonneville

1 Answer

2008 Triumph Triumph Bonneville no spark


Hi, Davi and the usual suspects are:
1. Fouled spark plugs.
2. Severely discharged or a damaged battery should have 12.5 volts or more and be able to pass a proper "LOAD" test if necessary, you may have a preliminary reading of 12.5 volts or more but little or zero amperage the battery is faulty and must be replaced, AGM batteries fail in this scenario more so than lead-acid batteries.
3. Check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
4. Loose connection at ignition coil or plug between ignition sensor and module.
5. Spark plug cables in bad condition, shorting/leaking, spark plug cable connections loose check for spark leakage in the dark.
6. Faulty ignition coil or electronic control module.
7. Faulty pulse coil.
8. Faulty CKP, CMP, or BAS sensor.
9. Faulty ignition switch.
10. Faulty run/off switch
11. Tilt sensor needs a reset.
12. Security alarm failing to disarm needs reset
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
2007 Bonneville No Spark Triumph Forum Triumph Rat Motorcycle Forums
How to diagnose no spark situation on motorcycle
Triumph Bonneville Service Manual Motorcycle 2001 2012 Download Manuals... $15 very cheap
https://www.triumphestore.com/
Triumph Bonneville Owner Handbook Manual

Mar 15, 2018 | 2008 Triumph Triumph Bonneville

1 Answer

2002 triumph america I'm running NGK DPR8EA 9 spark plugs ,I'm not getting much spark do I have them gapped at 035.


Hi, Mitchell for this scenario you will need your service/owners manual if you can't find the first and best tool you ever bought for your Triumph, despair not, for a mere $10 you can download another one.
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
2009 Bonneville Spark Plug Gap
Triumph Bonneville Spark Plug Change
Triumph Bonneville America 2002 2007 Workshop Service Manual Download... $10
http://www.triumphestore.com/
Triumph America Handbook

May 04, 2017 | 2002 Triumph Bonneville America

1 Answer

Triumph bonneville america starts but wont rev


Hi, Rex and the usual suspects are:
1. Spark plugs in bad condition or partially fouled.
2. Spark plug cables in bad condition and leaking check for spark leakage in the dark.
3. Spark plug gap too close or too wide.
4. Faulty ignition coil, module, and or sensor.
5. Battery nearly discharged.
6. Check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
7. Intermittent short circuit due to damaged wire insulation.
8. Intake air leak.
9. Water, dirt, or rust in the fuel system, fuel pump and/or filter.
10. Old dead or bad fuel.
11. Faulty fuel pressure regulator
12. Pinholes in the in tank plastic convoluted tubing from the pressure regulator to the quick disconnect check valve.
13. Fuel tank vent system plugged.
14. Throttle body controls misadjusted.
15. Damaged throttle body or intake seals.
16. Loose, dirty, or corroded ignition module connector at crankcase.
17. Faulty MAP, CKP, O2, and/or CMP sensors.
18. Incorrect valve timing.
19. Weak or broken valve springs.
20. Damaged intake or exhaust valve.
21. Check for engine trouble codes.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have nice a day.
bonnie wont rev
Triumph Bonneville Ignition Control Unit CDI Limiter Failure
Triumph Bonneville 2001 2007 Workshop Service Repair Manual Download...
Triumph Manassas Shop and save on Genuine Triumph Motorcycle Parts...
Triumph America Handbook

Feb 03, 2017 | Triumph Motorcycles

1 Answer

1969 triumph t120r has spark and fuel going to motor but wont start


180 DEGREES OUT OF TIME??? IF YOU HAVE SPARK AND FUEL. AFTER REMOVING ALL SPARK PLUGS HAVE SOMEONE PUT THERE FINGER OVER SPARKPLUG HOLES AND CK THAT PLUG IS SPARKING WHEN ON COMPRESSION "WHEN KICKING HER OVER". IF NOT SWITCH POINT WIRES GOING TO COILS.

Apr 10, 2014 | 2001 Triumph Triumph Bonneville

1 Answer

Spark plug change


yes you need to remove the petrol tank

Jan 11, 2010 | 2007 Triumph Bonneville T100

2 Answers

Why would my 2005 Triumph Bonneville America go through two IGNITION CTRL UNITs in two years. The last one didn't work after storage all winter. Is frezzing weater bad for them? Should I remove it for...


I'd guess spark plug range is your most likely issue. Unless you just have some loose wires - check for that first. Research your area's weather, and make sure to check with Triumph regarding spark plug recommendations. This information could be in your Owner's Manual. Always use plugs that match your riding style AND the weather. You shouldn't have to remove the ICUs in the winter. If you think you do, maybe check for shorts in the system. You shouldn't be getting any ground leakage at all.

Jul 07, 2009 | 2003 Triumph Bonneville America

2 Answers

2006 EFI Bonneville


No need to remove tank. I use an 18mm (i think) deep socket to loosen plug and slide a 8 inch piece of tygon tubing over the plug to screw it out. Insert new plug into the clear tubing to engage (start) the threads of new plug. Most hardware/home supply stores sell the clear soft plastic tubing very cheap. Take a new plug with you to get tubing that will fit snugly on the spark plug insulator. Tightend to specified torque setting and ride. Do not overtighten, as the aluminum head will strip easily.

Dec 30, 2008 | 2008 Triumph Triumph Bonneville

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