engine bogging down on freeway/high rpms

P21
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Re: engine bogging down on freeway/high rpms

02 Dec 2012 23:54

#561051

i am diggin the coffin tank man its been years

Kawasaki KZ 1000 Police (2002) P21

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Patton
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Re: engine bogging down on freeway/high rpms

03 Dec 2012 00:01

#561053

jason289 wrote: ....As soon as i try to go fast it seems like 65 is tops and it just won't drink any more fuel or make power....

Perhaps the timing advancer is stuck and not advancing as it's supposed to with increasing rpm.

Good Fortune!

1973 Z1
KZ900 LTD

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donthaveakawman
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Re: engine bogging down on freeway/high rpms

03 Dec 2012 01:24

#561085

mine stops at 85mph :unsure:

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donthaveakawman
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Re: engine bogging down on freeway/high rpms

03 Dec 2012 01:29 - 05 Dec 2012 05:43

#561087

jason289 wrote: the new plugs are black and sooty,witch tells me im running rich.i get popping on decel but that doesn't mean it's running lean.When adjusting air screws does 1 turn mean 180 degrees or 360?haven't figured that out yet. :pinch: I currently have the needle set to top notch (leanest) and the bike has plenty of pep on the streets and seems to be happy also better idle.As soon as i try to go fast it seems like 65 is tops and it just won't drink any more fuel or make power.main jet too big?I may try third position from top of needle from what im seeing most recommend that setting.

turn the air/fuel mix screws in all the way, then turn them out 720 degrees. see how that works then put some gasket sealer on them to make an air tight seal. 3-1/2 turns for jet kit on kz750 1980.

Last edit: 05 Dec 2012 05:43 by donthaveakawman.

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donthaveakawman
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Re: engine bogging down on freeway/high rpms

03 Dec 2012 01:32

#561088

donthaveakawman wrote:

jason289 wrote: the new plugs are black and sooty,witch tells me im running rich.i get popping on decel but that doesn't mean it's running lean.When adjusting air screws does 1 turn mean 180 degrees or 360?haven't figured that out yet. :pinch: Icurrently have the needle set to top notch (leanest) and the bike has plenty of pep on the streets and seems to be happy also better idle.As soon as i try to go fast it seems like 65 is tops and it just won't drink any more fuel or make power.main jet too big?I may try third position from top of needle from what im seeing most recommend that setting.

turn the air/fuel mix screws in all the way, then turn them out 720 degrees. see how that works then put some gasket sealer on them to make an air tight seal.

If you meant the needlejets the dynojet motorcycle website will have a download for you to look at that will say what needle position to use. If that is who you got the jet kit from.

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jason289
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Re: engine bogging down on freeway/high rpms

03 Dec 2012 01:32

#561090

Timing advancer is lubed and not stuck.what about air screw? 1 turn is 180 or 360? I will try moving the needle to the third notch from the top when it stops raining so damn much.plugs look black already but i'll try anything.

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donthaveakawman
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Re: engine bogging down on freeway/high rpms

03 Dec 2012 01:36

#561091

the needle clip position is measured from the pointy end, the idle mixture screw determines the air/fuel mixture at idle, it should be accessible outside the carburetor.

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jason289
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Re: engine bogging down on freeway/high rpms

03 Dec 2012 01:46

#561096

It's not a dynojet kit,i bought some cheap carb rebuild kits off ebay.aftermarket stock adjustable needles.My air screws are currently 1 180 degree turn,so maybe that's part of the problem.Rich at idle and lean at 1/2 3/4 throttle?.makes sense to me.but obviously i don't know much for sure.Hopefully the needle clip adjust (rich) and lean out pilot circuit will help.I'll post results when done.

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1slickKZ1000
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Re: engine bogging down on freeway/high rpms

03 Dec 2012 02:01

#561100

I'm having about the same problem with my KZ1000... Sooty plugs at higher RPM. (I just posted a thread looking for testing info). I'm not getting enough charging voltage so likely not putting enough voltage to the coils. Your problem may be different but you might check for something close to 14 volts while revving it to 4000rpm. I only have 12.5 at 4k...

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jason289
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Re: engine bogging down on freeway/high rpms

03 Dec 2012 02:57

#561112

got 14 + volts at battery when revving so im all good there.although I should replace my coils for cheap insurance.It's a carb tuning issue in my opinion.going to make some changes and i'll report back.

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donthaveakawman
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Re: engine bogging down on freeway/high rpms

03 Dec 2012 17:45 - 03 Dec 2012 17:47

#561183

I am not sure, I don't have mechanical slide carbs, but mine are2 full turns. tiki tiki tiki tiki.

Last edit: 03 Dec 2012 17:47 by donthaveakawman.

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Kidkawie
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Re: engine bogging down on freeway/high rpms

03 Dec 2012 18:13

#561186

jason289 wrote: When adjusting air screws does 1 turn mean 180 degrees or 360?haven't figured that out yet.

:huh:

1975 Z1 900
1994 KX250 Supermoto
2004 KX125

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