Cuts out at lights!

Ant132 · World Chat Champion Joined: 18 Nov 2007 Karma :

Had a lovely day on the bike, but i was in some heavy traffic and the bike just cut out when i was stationary. Pushed the starter and it started fine and idled fine again, I thought nothing of it until it happened again about 10/15 miles later in some more traffic.

Started back up fine once again. I notice no power loss at all and all the time it happens the bike is thoroughly warmed up. It only ever happens once i am completely stationary or at idle at lights etc. etc.

Its not everytime i stop, just every so often but obviously it shouldnt really happen. Idle is a steady 1k. What could this be? Thumbs Up

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1980 Suzuki TS50 ~ 1984 Honda CB400N ~ 1992 Triumph Trident ~ 1998 Suzuki Bandit 1200

Ichy · World Chat Champion Joined: 15 Jul 2005 Karma :

Pure guessing but I think its probably electrical. When idling the battery isn't being charged and the generator is just about putting out enough power to keep it ticking over. Dunno.

I'd check the spark, and maybe the points, assuming thats whats fitted.
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Ant132 · World Chat Champion Joined: 18 Nov 2007 Karma :

Yeah, i think it is electrical as its a very sudden cut out. It doesn't fade out.

It's got a CDI, not points. Checked the plugs and they are both a grey/stone kinda colour. Not sure if it makes a difference but the bike hasnt been used for nearly two weeks due to some fuel issues - now resolved Mr. Green

Will check spark tomorrow.

Thanks Thumbs Up

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1980 Suzuki TS50 ~ 1984 Honda CB400N ~ 1992 Triumph Trident ~ 1998 Suzuki Bandit 1200

Ichy · World Chat Champion Joined: 15 Jul 2005 Karma :

Might be worth just giving the connections to the coil a good clean. I can imagine it being one of those niggling problems since it doesn't happen all the time.
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Ant132 · World Chat Champion Joined: 18 Nov 2007 Karma :

Will do Ichy. Well, i did two trips of 50 miles and 40 miles today and it happened 5/6 times altogether i reckon. So hopefully something minor.

Thanks mate Thumbs Up

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1980 Suzuki TS50 ~ 1984 Honda CB400N ~ 1992 Triumph Trident ~ 1998 Suzuki Bandit 1200

B10Hazard · World Chat Champion Joined: 29 Jan 2009 Karma :

Your idle is okay isnt it ?
Not to low revving or anything
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Ant132 · World Chat Champion Joined: 18 Nov 2007 Karma :

Permanant 1k rpm idle. Manual says 1200 but adjusting the 'idle knob' doesnt really have alot of effect on the idle Confused

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1980 Suzuki TS50 ~ 1984 Honda CB400N ~ 1992 Triumph Trident ~ 1998 Suzuki Bandit 1200

Ichy · World Chat Champion Joined: 15 Jul 2005 Karma :

I guess a bit of a service wouldn't hurt, just check the valves and carb sync for starters. Give the vacuum hoses the once over.
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Ant132 · World Chat Champion Joined: 18 Nov 2007 Karma :

It's just had a full service (3/4 weeks ago) but i only did 10 miles on it before the i had it off the road re-sealing the fuel tank inside. Haven't checked the valves or balanced the carbs so thats something to look into. Fuel lines have just been replaced today and carbs only went back on this morning after a clean out. Also, the bike dont have vaccuum hoses, just the one fuel tube (tank to left carb)

Thumbs Up

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1980 Suzuki TS50 ~ 1984 Honda CB400N ~ 1992 Triumph Trident ~ 1998 Suzuki Bandit 1200