Idling rev? (1993 ZXR250 C)

**PHATVW** · 19th January 2009, 17:27

Hi all,

I've got a 1993 Kawasaki ZXR250 C, just got it fully serviced today but noticed the idling rev now sits at just under 500 rpm

is this right? I thought normally 250's idle at around 1,800rpm?

**CB ARGH** · 19th January 2009, 17:30

ZXR... inline four.

It's amazing, mine idles at around 700. There's nothing wrong with it idling low, fuel saving I guess. It's pretty cool how a machine capable of 18,000RPM can manage to sit at 500.

I wouldn't worry, but if you've got a problem with it then just find the throttle adjust line and twist it until you feel comfortable. Being summertime it shouldn't be a problem when cold, but winter may be fun.

**scracha** · 19th January 2009, 18:17

Nope, no way it should be sitting at 500rpm after a service.

**wbks** · 19th January 2009, 18:25

So adjust the idle to 1800rpm then! 500 on mine (which isn't much different) it almost about to stall so it can't be good for it.

**scracha** · 19th January 2009, 18:27

Originally Posted by wbks

So adjust the idle to 1800rpm then! 500 on mine (which isn't much different) it almost about to stall so it can't be good for it.

After it's warmed up a little and the choke is off, you want it idling at around 1200RPM

**Brett** · 19th January 2009, 18:32

Originally Posted by scracha

After it's warmed up a little and the choke is off, you want it idling at around 1200RPM

sounds abotu right. Just adjust it with the little black toggle coming off the engine...a few turns and it will be about right.

**CB ARGH** · 19th January 2009, 20:25

Wow, I'd better adjust mine too then!

I'm wrong, apologies.

**scracha** · 19th January 2009, 21:26

Did your service include carb balancing? If it did then I'd leave the idle screw well alone and take it back to where it got serviced.

**bungbung** · 20th January 2009, 09:44

Originally Posted by scracha

Did your service include carb balancing? If it did then I'd leave the idle screw well alone and take it back to where it got serviced.

Idle screw on a zxr adjusts the throttle stop, won't affect carb balance.
Adjust away!

**PHATVW** · 20th January 2009, 13:41

I'll try to find the idle screw tonight when I get home.

Yeah the full service include carb balancing and valve clearance, basically everything. It's getting new front forks at the moment

**steelestring** · 20th January 2009, 15:47

Its easy to brush past the adjuster when putting the fairings back on. Sometimes my knee bumps it too when it falls out of the fairing.

**R6_kid:Me** · 26th January 2009, 21:29

Originally Posted by CB ARGH

I wouldn't worry, but if you've got a problem with it then just find the throttle adjust line and twist it until you feel comfortable. Being summertime it shouldn't be a problem when cold, but winter may be fun.

DONT EVER ADJUST YOUR IDLE WITH THE THROTTLE CABLE!

There is an idle adjuster knob which hangs down from the carbs, as said 1100-1500rpm is 'normal'