Bike cutting out when coming to a stop

everyreasonto · Nitrous Nuisance Joined: 10 Mar 2010 Karma :

Just got my zxr400 back on the road after some cam-chain tensioner issues but now i'm having a different problem. When I slow to a stop, the bike cuts out.

At first I though it was something I was doing wrong but I couldn't consistently replicate it. The only way I found to prevent it, is when it is coming down the revs whilst slowing down, at about 2k if I quickly blip the throttle, it usually comes down to idle just fine.

The last thing that got done to the bike was getting the carbs balanced. When it happens I can usually start it back up straight away if I am still rolling.

It might be worth mentioning that sometimes it doesn't always start straight away in the morning, could this all be caused by a duff battery?

It's a bit embarrassing overtaking a car, only to have it overtake me again at the next roundabout as I am desperately trying to get it started again Embarassed

Help

richbike · Two Stroke Sniffer Joined: 29 Mar 2010 Karma :

sounds like they unbalanced the carbs.
You tried upping the tickover?
if it aint broke, fix it 'till it is...

Alexio · World Chat Champion Joined: 27 Aug 2009 Karma :

Uping the tickover speed might "solve" it but not properly. If the battery was duff it is possible that once the revs come down the alternator isn't producing as much electricity and so it cuts out on a sudden weaker spark, although that would mean that it wouldn't be idling at all I think.

Carbs not being balanced properly might well be the cause but if just one of your cylinders didn't manage to fire, or fire "strongly" enough I would assume that the other one firing would have enough momentum to get it going again (seeming as you claim it is capable of idling) but I really wouldn't know and I suppose that varies from engine to engine.

I can't even think logically why an unbalanced carb would affect the engine dying from coming down from high revs if it's still capable of idling though.

The engine is obviously reacting to spinning down and hence spinning faster than the amount of petrol given to it that it would need to ordinarily go at that speed. A faster spinning engine though surely means more energy to compress what ever fuel is going in to it and therefore I really don't know why this would have an effect either. All I know is that I'm blubbering on like a tired idiot who needs to switch off his laptop already and sleep. I'll be interested to know what's really wrong Thumbs Up

____________________
will never give up his CG. I look at my fuel gauge more as a progress bar than a fuel gauge.
G: With my GSXR I do often effectively use it as a scooter with a clutch in town.
ms51ves3: why does it need 500 miles? Are you teaching it how to be a piston?

mr rip · Scooby Slapper Joined: 24 Jun 2009 Karma :

I've had a similar problem with a couple of my bikes & it turned out to be the mixture too rich at the air screw

if I had to guess I would say start looking there
____________________
never criticise a man until you've walked a mile in his shoes, then when the muck hits the fan you'll be a mile away & you'll have his shoes

Paxovasa · World Chat Champion Joined: 25 Apr 2010 Karma :

Does it do it when the engine is still relativly cold or when the engine has warmed up?
____________________
Suzuki GSF600 K3 (in the fastest colour, black).

MarJay · But it's British! Joined: 15 Sep 2003 Karma :

It could be a badly adjusted clutch too...
____________________
British beauty: Triumph Street Triple R; Loony stroker: KR1S; Track fun: GSXR750 L1; Commuter Missile: GSX-S1000F; Cheap project: CBR900RR FireBlade
Remember kids, bikes aren't like lego. You can't easily take a part from one bike and then fit it to another.

mr rip · Scooby Slapper Joined: 24 Jun 2009 Karma :

everyreasonto · Nitrous Nuisance Joined: 10 Mar 2010 Karma :

Nomasd1019 · L Plate Warrior Joined: 08 May 2018 Karma :

I just bought a 675 Triple, and every time I come to a stop it cuts out.
I'm just wondering if it could be the TPS Sensor as he says it is?

Any advice would be awesome.

Teflon-Mike · tl;dr Joined: 01 Jun 2010 Karma :

Holey thread necromany!
This is an eight year old thread, about a bike with carbs in which I see no mention of a Throttle-Possition-Sensor for a fuel injected bike, the ZXR400 isn't!

Did you not think that a new thread would have been appropriate to your problem?
____________________
My Webby'Tef's-tQ, loads of stuff about my bikes, my Land-Rovers, and the stuff I do with them!
Current Bikes:'Honda VF1000F' ;'CB750F2N' ;'CB125TD ( 6 3 of em!)'; 'Montesa Cota 248'. Learner FAQ's:= 'U want to Ride a Motorbike! Where Do U start?'