Triumphrat

bonnecom

hey.....started her up after only being down for a month and she's only firing on one cylinder. Every once in a while the left (as I sit) will catch then die out again. it doesn't sound serious, but any quick fix ideas before I start to lose hair over it? Tanks full, but it has been cold as hell around here and it's a really really wet day but warmer..
DC

coelacanth

spark plug? clogged left carb?

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07 Bonnie
Black/red T-100 tank with black headlight shell, rear fender eliminated, short front fender, Monza Cap etc.
AI/snorkel removed, UNI filter with TORs. 120 / 40 jets, 1 shim, 2.75 out. EBC HH brake pads.

bendavanza

2 quick things

1 drain the carbs, there is a small drain screw on each carb, et the bottom of the bowl facing you. Drain enough gas to have done some rinsing, at least a cup or 2 per carb, esp the problem side.

2 check the plugs. You will need an 18mm spark plug socket, Sears has a nice one or you can look around but they are not very common sockets. you could also grind down the outside of a 18mm deep well socket.
-Ben

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01 Bonneville, 56 Thunderbird, 68 TR6, 71 reversed head Bonnie (chopped), 79 HD Shovel, 67 MW Benelli 350 single, 46 BSA C11 plus many piles and projects.

http://www.bendavanza.com

bmetz99

Had this problem with my '04, running intermittently on one cylinder while the choke was engaged. Turned out to be a clogged enrichening circuit. Pulled the carbs and gave 'em a good going over with spray-type carb cleaner, end of problem!

Bill

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\"A motorcycle is a tool, not a fashion accessory"

My Bobber

amanger

+1 bmetz99,
Had the same problem.Had to take the petcock off and clean the filter it was also clogged by the tank liner paint they use breaking down.

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07 865 Silver Bonnie....Bobbed Guards, Tacho, Grab Rail, Lucas Tail light, Mini Blinkers, Dart Screen, LSL Sport Bars, 1" Longer Hagons, 10mm Raised Forks, K&N Pods, Staintunes, 140/40 3 1/2 turns + 1 shim......etc....etc...

gonzo'st100

I had a clogged jet on mine. My right cylinder would fire only upon putting a load on the engine.

Motorboy

If all that does not help then it is a blown diaphragm in the air injection valve which is causing that cylinder to go lean....

Pull off the vacuum hose on the left carb spigot close to the head and suck on it ,,,, if you can pull a vacuum then the valve is aok, but if air comes through then the diaphragm is shot....

Cold weather and ethanol in the gas make for rubber parts that are prone to splitting....

Good luck with it !
Robert

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If we arn\'t having fun,,,then we arn\'t doing it right.....

RonD

always start with the simlest thing first it can be many things as the guys have said ,but dont go through all the other stuff until you have cahnged your plugs then work back from there.

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Regards Ron
Hurricane pictured(Harry)

bonnecom

Thanks all..I'll let you know how it turns out.

2wheeltherapy

Switch the plugs you have if opposite cylinder misfires, it's the plug. Just a quick check.