01zx12rguy
Parking Attendant
Posts: 1
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posted June 12, 2014 03:01 PM
01zx12r idle problems
I recently purchased an 01 bike that was kept ina climate controlled enviroment he had it serviced only mods are a complete muzzy ehaust and a power commander i has a rouh idle. the bike has less than 400miles but the bike runs good does anyone have any advice thanks
  
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tuusinii
Pro
Posts: 1031
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posted June 14, 2014 08:05 AM
Congrats on a new ride and good find with such a low miles. Muzzys are famous for the rough idle but finely syncing the throttle plates, fiddling with air bypass srews and fine tuning the AFR will get it better. Best would be to use ECU hacking but not many people aroung are familiar with it but you can find all the info on this forum from thread labeled "Hacking one ECU at time..." It's long but in the end part there are instruction how to do it. I've myself gone that route and in the end it's really rewarding because there are lot of "weird" tuning decision by the factory because of emission etc.
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dougmeyer
Needs a job
moderated
Posts: 2713
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posted July 03, 2014 08:23 PM
The bike will vary a couple hundred rpm up an down at idle. You can tune most of it out with the timing on a PC3R map. The Muzzy pipe changes back pressure at idle and the stock ECU will not compensate for that. It's not "wrong" it just "is". Don't worry about it.
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It's not that I think you're dumb, it's just that so much of what you know isn't true....
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fish_antlers
Administrator
The Truth is Out There
Posts: 21894
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posted July 05, 2014 11:41 AM
It just is is the correct answer! Great bike! Congrats!
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What business is it of yours where I'm from, Friendo?
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Gunner
Needs a life
Posts: 5778
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posted July 05, 2014 09:48 PM
My Arata pipe doesn't hunt and lope like that. Owned another 12R that had an Ak pipe on it and that pipe didn't hunt either. Muzzy seemed to be more concerned with peak power when he designed that pipe at the expense of the other 98% of the map that you will use most. ZX12R is a great bike you would probably be much happier with an AK or Arata pipe IF you could find one they are both out of production and hard to find..
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There's no such thing as a motor with no more power to give only people with no more intelligence to get it
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2000redrocket
Pro
Posts: 1662
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posted July 06, 2014 10:56 AM
all i can say is my bike sounds kool with the muzzy ti pipe. dollar for dollar it is a good deal.
get a tune on it cause if not with al the air it bleeds off the head it will be real rich. at a lot of places.
i concur with the ecu hack. it is to me the best way to make power and more than a commander tune.
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Big country
Parking Attendant
Posts: 6
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posted August 08, 2014 06:01 PM
I have a 2001 zx12r with a mussy myself and had this same problem... I had to have my fuel remaped (computer)
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2001 zx12r custom paint,
stretched, 16,50,
runs 5.80's 1/8th mile @117mph
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customface
Parking Attendant
Posts: 17
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posted October 09, 2014 04:26 PM
Congrats with your new bike. Have the throttle plate synchronized and replace all 4 plugs and see what happen.
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capt10ed
Expert Class
Posts: 327
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posted October 10, 2014 03:32 AM
I agree with gunner I had both om my 04 12
The Arata idled like an eco-box car
it hunted by maybe 50/75 rpm.
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2014 Loring AFB 14 runs over 200mph
with a best of 208.1 in 1.5 miles
and 204.5 in the mile.
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tuusinii
Pro
Posts: 1031
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posted October 10, 2014 04:23 AM
With ECU tuning it can be most probably fixed. PC can't handle it because it relies on TPS setting that are not used on idle. When I was tuning my Akra found that if there is wrong values it also starts to hunt. It's all in the ECU I think.
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