Bike stuttering and then cutting out completely.

Motorcycling
1

Wondering if anyone has any experience of the following:

Bit of background first - my kwak has sat for a few months doing nothing while I used my other bike (I should have drained the carbs etc but was a lazy bastard).

Took it out the other day and it was running fine - few miles later engine started stuttering then cut out completely had to wheel it home.

Started it up again today - same thing - everything fine, started stuttering a mile down the road- cut out.

I’m assuming this is a result of storage - gummed up carbs/crap in the tank etc?

Thanks for any opinions. :slight_smile:

2

Could be what you said, could be a blocked fuel filter,

Try drain the crab bowls, drain old fuel out (or top it up with fresh fuel) and check fuel filter…

Could even be condensation in the tank…

3

I’ve had that exact problem twice from a torn/misplaced carb diaphragm, but it could be a needle sticking etc or even spark related. Check the carbs first! (or just drain them and run some redex through if you’re feeling lucky!)

4

Thanks guys - both good calls - will follow these routes first. :slight_smile:

5

Dirt in carb

6

Yeah this is what I’m thinking - to be honest it could be so many things - it’s an old bike so it might even be a coil packing up or something?

7

Just had a word with a really experienced bike mechanic I know - he reckons that if the bike runs for a while ok it’s unlikely to be carbs but is more likely related to fuel supply - either a gummed fuel tap/fuel pump.

I guess i’ll check these out before I get to the carbs.

8

Or fuel filter… Or condensation…

9

Yes mate - could definitely be one of these two.

However - I’ve got a hunch it’s a coil failure.

Bike runs ok until it gets to operating temperature then starts stuttering - sounds like a coil.

I’ll try a multimeter test, check the plugs etc.

10

My bike done the same thing, well two infact,

Both bandits (two different models) one had a blocked filter,
One had water in the tank…

The water one caused me to loose love for the bike… :frowning:

11

I feel your pain mate.

FFS after reading 250 different threads on ‘help my zx7r won’t start/cuts out’ I’ve come to the conclusion the Kawasaki ZX7R is like the millennium falcon out of Star Wars, it’s an unreliable piece of **** but when it’s actually working it’s awesome.

Now I’m trying to work out if it’s the infamous ‘gray wire problem’: