johnnnyboy
Expert Class
08 Concours 14
Posts: 164
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posted February 26, 2008 12:26 PM
hard to start when cold
it takes about 3 - 4 trys to start the bike when cold even with the choke thing on are they all hard to start ? is there a map for better starting ? once it going for a few min it will start in a sec but when its cold not great thanks
2000 with a zero map
  
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Megabyte
Pro
Posts: 1047
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posted February 26, 2008 02:48 PM
quote:
it takes about 3 - 4 trys to start the bike when cold even with the choke thing on are they all hard to start ? is there a map for better starting ? once it going for a few min it will start in a sec but when its cold not great thanks
2000 with a zero map
+1
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We First make our habits and then our habits make us.
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countersteer
Needs a job
Didn't read the owners manual
Posts: 2207
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posted February 26, 2008 03:28 PM
dont quote me, but i think it has to do with backpressure when equipped with an aftermarket exhaust. just my theory, im probably wrong. either way, id like to know too.
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Scott
Long Island, New York
2006 ZX-14, 2003 ZX-12R
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KZScott
Needs a life
high on speed
Posts: 7235
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posted February 26, 2008 04:42 PM
what pipe?
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01 ZX-12R 8.84 @ 156.3 no bars, DOT tires. Pump Gas, NA.... turbo 8.47 @ 164.
00 ZX-12R 8.62 @ 165.2 no bars, slicks, Pump Gas, 55 shot.... turbo 8.32 @173
00 ZX-12R Fastest NA Kawasaki in the world 1: 222.046 1.5: 226.390 Loring AFB
00 ZX-12R street turbo 1: 227.9 1.5: 234.1 Loring AFB
00 ZX-12R LSR turbo 1: 263.1 1.5: 266.5 Loring AFB Worlds fastest ZX-12R
CMG Racing RCC Turbos
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1adam12
Expert Class
Posts: 292
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posted February 26, 2008 05:23 PM
mine takes 2 or 3 most times cold always has stock or piped pc3r 3degrees timing advance and bmc filters.Thought was normal my thing is sometimes at idle mine will stumble or pop back through airbox if u crack throttle at wrong time.Not very often just pisses me if when it does and i know it in pc3 because did not start until installed.
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KZScott
Needs a life
high on speed
Posts: 7235
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posted February 26, 2008 06:16 PM
added timing will make it harder to start, so will less back pressure. are you adding timing with the PC? if so i can fix your map so it doesnt add timing down low where you dont need it anyway....
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01 ZX-12R 8.84 @ 156.3 no bars, DOT tires. Pump Gas, NA.... turbo 8.47 @ 164.
00 ZX-12R 8.62 @ 165.2 no bars, slicks, Pump Gas, 55 shot.... turbo 8.32 @173
00 ZX-12R Fastest NA Kawasaki in the world 1: 222.046 1.5: 226.390 Loring AFB
00 ZX-12R street turbo 1: 227.9 1.5: 234.1 Loring AFB
00 ZX-12R LSR turbo 1: 263.1 1.5: 266.5 Loring AFB Worlds fastest ZX-12R
CMG Racing RCC Turbos
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Y2KZX12R
Needs a job
CompetitionCNC.com
Posts: 3762
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posted February 27, 2008 03:56 AM
Is the fuel pump relay kicking on for the 2-3 seconds when you turn the key on?
That primes the fuel rail and brings it up to pressure.
Try turning the key on and let the fuel pump prime then shut the key off. do this several times. you may have to wait a few seconds between cycling the key.
If it starts right up after doing that then the fuel is draining back to the tank when the bike sits.
How long does it have to sit before the long cranking to start happend? an Hour? A day? a week?
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Y2KZX12R
CompetitionCNC.com
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bloodso
Parking Attendant
Posts: 25
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posted February 27, 2008 04:33 AM
I have a 2002 12 with a full muzzy, PC3 w/ map from a board member, and BMC race filters. My bike always starts on the first try with the choke on.
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johnnnyboy
Expert Class
08 Concours 14
Posts: 164
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posted February 27, 2008 08:22 AM
not sure how long ill haveto let it sit and try it a few times its not that big of a deal but would be nice to start a little quicker
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bloodso
Parking Attendant
Posts: 25
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posted February 27, 2008 01:56 PM
quote:
not sure how long ill haveto let it sit and try it a few times its not that big of a deal but would be nice to start a little quicker
If you pull the choke all the way after the bike warms up does the idle rise any?
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shane661
Needs a life
Posts: 11494
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posted February 27, 2008 02:02 PM
I suspect it might just be a little lean. My bike is like that in the cold. I know it needs a little more fuel, but I have been too lazy to change it.
Shane
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psycho1122
Pro
Posts: 1608
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posted February 28, 2008 06:32 AM
Equalize Throttle Body Air Screws (Sync) and add fuel at idle.
@ 2 turns out with a full pipe is a good starting point.....
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You say PSYCHO like it's a BAD thing!!
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dougmeyer
Needs a job
moderated
Posts: 2713
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posted March 05, 2008 03:52 PM
That "choke thingy" is NOT a choke. It is nothing more than a fast idle to aid warm up if you feel you need that. It has NOTHING to do with the A/F on startup other than add air by cracking the throttles and fuel via TPS. The cold start mixture is controlled by the OAT sensor and the appropriate mapping. It assumes that the fast idle is not altering the mix at that point. Properly mapped, the bike should start "hands off" and after it fires you can add "fast idle" to hasten warm-up. Adding the fast idle before it fires kind of confuses the process. If you have a consistent starting problem try enrichining your zero throttle @ minimum rpm cells a bit.
Oh yeah, and what Y2 said.
Brontosaurus
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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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tshultz
Zone Head
Posts: 556
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posted March 05, 2008 04:28 PM
I have the same problem too. The bike always started fine when it was stock Now since I put a full hindel system on It is hard to start when it cold also it dosent idle ether till it is warmed up
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