ZZR 600 E3 losing 2 cylinders and a third of the rev range

Well the weather has gone nice again, and the bike has decided to
start playing up.

Last night when leavin work I noticed the biek would only rev upto
10k, then lurch around and
then rev through to 12.5k.

A few miles further down the road the bike started lurching at 8k as
well as at 10k and still only
rev upto 12.5k. About 2 miles further the bike was running on 2
cylinders for a bit and then died.

I tried restarting it, then with the choke and you could smell the
fuel coming through, then kicked the sidestand down and up to see if
it was the switch and with no choke it started again on 2
cylinders with the rev counter floating up and down the scale then
about a minute later it was
running on all 4 again.

The only thing that has changed is that I have replaced the chain and
sprockets, and noticing
that the sidestand switch was covered in chain grease gave it a clean.
Initially the bike wouldnt
rev cleanly below about 5k but this went away after a day so I
thought it could have been
because the bike was left standing for a while.

Any thoughts as to where the issue could lie, I was going to bypass
the sidestand switch and check the fuel tank breather, does this sound
electrical or fuel?

I would have thought that the only thing to cause the bike to drop a
pair of cylinders would be
losing a coil, dont know why it would then die though.

Any help appreciated.

Cheers

 

If it was OK until you cleaned the sidestand switch, this is where I'd
be looking first.

And yes, bypassing it is easy and a very good idea.

It *could* be a coil gone pop. When that happened to me on a Kawasaki
GT750, I actually thought it was a fuel problem because of the farting
and banging as it slowly died.

But my money's on the sidestand switch.

 

message

I do believe you've given me hope that my VN will once again rise from the
depths.

I considered a duff coil, but not *seriously* iykwim and concentrated on the
carbs, but I'll buy two new coils and have done. The spitting, farting and
banging drove me to distraction.

Cheers TOG.


--
Beav

VN 750
Zed 1000
OMF# 19

 

Oh shit. Who really wants a VN back on the road?

 

I don't mind, especially the 1500 ones like the one ridden by the bloke
who wanted to race me last night. He was doing fine, right up to the
first little bend in the road.

<snigger>

 

message

Hey, don't diss the VN, it's comfortable, smooth, generally reliable (given
a small irritating problem) econimical...oh hang on, it's turned into a
fucking Honda Civic.

<re-thinks, back orders coils>


--
Beav

VN 750
Zed 1000
OMF# 19

 

The 750 is faster and it goes around corners a LOT better than the 1500 and
1600's.


--
Beav

VN 750
Zed 1000
OMF# 19

 

I have ridden a 1500 Nomad and even ginge would be quicker round corners
than that thing.

In fact, thinking about it, it may be the perfect bike for him as he
could easily ride it faster than it is capable of being ridden.

 

That's the one belonging to your mate Big Dave IIRC?

 

Big Al.[1]


[1]Well just Al actually but for dramatic emphasis we shall call him big
in this context. Big Dave, who could probably look Tallbloke straight
in the eye is Al's mate and makes him look small is bigger and used to
own My Ole VT before I did.