Any one else experience this?

Moderator: Moderators

parby81
zxr400 oc member
zxr400 oc member
Posts: 364
Joined: Mon May 05, 2008 3:41 pm
My Bike: ZXR400 L9
Location: Rickmansworth, Herts UK

Any one else experience this?

Post by parby81 »

When i have some choke on from cold the bike revs accordingly. Sit it at about 2-2500rpm for a few secs . The usual thing.
This is all on the side stand.

When you lift the bike upright, the revs suddenly drop down to just over 1000rpm. and if you rock the bike side to side it struggles then dies.

Anyone else? or know if somethings wrong?
These things are sent to try us!!
User avatar
RedexRobB
Site Admin
Site Admin
Posts: 7212
Joined: Fri Aug 30, 2002 7:37 pm
My Bike: ZXR400L3
Location: Ipswich, Suffolk

Re: Any one else experience this?

Post by RedexRobB »

I really wouldnt worry about it, thats not what people normally do id have thought. Can only imagine that when you lift the bike off the stand the float bowl level changes which i guess could affect how it runs? No idea if that makes any sense or not, just an idea.
parby81
zxr400 oc member
zxr400 oc member
Posts: 364
Joined: Mon May 05, 2008 3:41 pm
My Bike: ZXR400 L9
Location: Rickmansworth, Herts UK

Re: Any one else experience this?

Post by parby81 »

yeh, its just it runs better on the side stand tho!!!,and yet all the float levels are bang on the money!!! :smt017
These things are sent to try us!!
zimm
zxr400 oc member
zxr400 oc member
Posts: 2320
Joined: Tue Oct 10, 2006 12:32 am
My Bike: ZXR400-M4, ZX4, ZX6R.
Location: Herefordshire

Re: Any one else experience this?

Post by zimm »

but if its on an angle .. they arent ..

it'd run fine completely vertical with a tad more choke on.
User avatar
RedexRobB
Site Admin
Site Admin
Posts: 7212
Joined: Fri Aug 30, 2002 7:37 pm
My Bike: ZXR400L3
Location: Ipswich, Suffolk

Re: Any one else experience this?

Post by RedexRobB »

zimm wrote:but if its on an angle .. they arent ..
My point exactly :smt001
User avatar
deviant
zxr400 oc member
zxr400 oc member
Posts: 1352
Joined: Thu Jun 02, 2005 9:50 am
My Bike: ZXR400 L3
Location: Nottingham, UK
Contact:

Re: Any one else experience this?

Post by deviant »

yeah, with the choke on mine it will sometimes run at higher revs on the stand than upright.
In the garage:
Kawasaki ZXR400 L3 - shiny
Suzuki DR800 - bouncy
1978 Suzuki GS400 - PROJECT RETRO RACER!
Kawasaki GPz500S - for sale soon
Honda CG125 BR-J - in bits
parby81
zxr400 oc member
zxr400 oc member
Posts: 364
Joined: Mon May 05, 2008 3:41 pm
My Bike: ZXR400 L9
Location: Rickmansworth, Herts UK

Re: Any one else experience this?

Post by parby81 »

seems to run better on the stand, bit more choke upright and it dies because its become too rich!!
These things are sent to try us!!
rover220
zxr400 oc member
zxr400 oc member
Posts: 613
Joined: Sun Oct 21, 2007 12:24 pm
My Bike: zx7r p6
Location: Stafford

Re: Any one else experience this?

Post by rover220 »

just get on it and ride the thing, its not serious problem, infact, its not a problem at all :smt001
Image
parby81
zxr400 oc member
zxr400 oc member
Posts: 364
Joined: Mon May 05, 2008 3:41 pm
My Bike: ZXR400 L9
Location: Rickmansworth, Herts UK

Re: Any one else experience this?

Post by parby81 »

yeh yeh i know, and above that she runs fine anyway. just one of those little annoying things. I'll just add it to the list of things to look into at the next overhaul!!
These things are sent to try us!!
zimm
zxr400 oc member
zxr400 oc member
Posts: 2320
Joined: Tue Oct 10, 2006 12:32 am
My Bike: ZXR400-M4, ZX4, ZX6R.
Location: Herefordshire

Re: Any one else experience this?

Post by zimm »

paid attention to mine after reading this ..

does it too ..

its just cos when the bike is on an angle the floats arent at the height they are set at, and more fuel gets through.. thats all... i'd bet all bikes with CV carbs do it.
bendog66
L-plate hell
L-plate hell
Posts: 479
Joined: Sun Oct 12, 2008 11:12 am
My Bike: ZXR400 L4, ZX6R F1 track
Location: Chesterfield

Re: Any one else experience this?

Post by bendog66 »

You'll probably find the problem goes away if you change your carb inlet rubbers. :smt001
parby81
zxr400 oc member
zxr400 oc member
Posts: 364
Joined: Mon May 05, 2008 3:41 pm
My Bike: ZXR400 L9
Location: Rickmansworth, Herts UK

Re: Any one else experience this?

Post by parby81 »

done that!!
anyways, got some new carbs as apparently mine were shot. AMS sorted me out there though i don't think many people are using him as he remembered the website but said no one ever uses it. Still gave me discount though, top bloke!).
Carbs have sorted all below 4000rpm running wise, still doesn't idle quite right. And now a bit hesitant around 6000 but fine above 10000. Think the carbs need balancing, obviously didn't get it quite right!!
These things are sent to try us!!
bendog66
L-plate hell
L-plate hell
Posts: 479
Joined: Sun Oct 12, 2008 11:12 am
My Bike: ZXR400 L4, ZX6R F1 track
Location: Chesterfield

Re: Any one else experience this?

Post by bendog66 »

That's odd. I had exactly the same thing (also, the idle dropped when facing down a hill) and was cured with the carb rubbers. :smt017
parby81
zxr400 oc member
zxr400 oc member
Posts: 364
Joined: Mon May 05, 2008 3:41 pm
My Bike: ZXR400 L9
Location: Rickmansworth, Herts UK

Re: Any one else experience this?

Post by parby81 »

Needs a new timing chain. Tensioner is new but can't get the cams to line up quite right. slightly off. So either inlet or exhaust valves could be opening a tad early or late. But then hey, its done 33,000 miles so it's probably about time it had a new one!!
These things are sent to try us!!
Jeppo
L-plate hell
L-plate hell
Posts: 279
Joined: Sat Sep 06, 2008 10:54 pm

Re: Any one else experience this?

Post by Jeppo »

I find the revs drop if u just straighten up the handlebars while still on sidestand (with choke). I always assumed it was because by movin the bars you were easin up tension on the choke cable.....Who knows lol
Post Reply