Well the subject about sums it up. My bike's run awesome for the couple months that I've owned it. No stumbling or bogging. However I've never needed choke when cold, just a quick throttle blip and it settles right down to 1100rpm.
Does this mean the idle circuits running rich? Will it hurt my gas milage?
Don't need choke, too rich?
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Re: Don't need choke, too rich?
does it stumble between 5,000 and 6,000 RPM ? (WHILE RIDING)
" several meat-eaters lay in vomit, too weak to move..."
Re: Don't need choke, too rich?
you shouldn't NEED choke to start the bike anyways
93 Yamaha FZR 600 - Track Project
-in NOT AS MANY pieces for track, beater prep
SOLD
88 FZR1000, 90 FZR 1040, 03 Suzuki SV1000S, 06 R6 50th Anniversary
-in NOT AS MANY pieces for track, beater prep
SOLD
88 FZR1000, 90 FZR 1040, 03 Suzuki SV1000S, 06 R6 50th Anniversary
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ragedigital
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Re: Don't need choke, too rich?
Your "richness" at idle and low throttle is controlled by the IMS or Idle Mixture Screws. Some call them the A/F screws.
This should not affect normal riding conditions which are generally above 1/8 throttle.
This chart should help:
This should not affect normal riding conditions which are generally above 1/8 throttle.
This chart should help:
Thanks for joining and participating in the most "active" FZR Community on the internet!
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megaloxana
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Re: Don't need choke, too rich?
Do you know how many turns your mixture screws are at?
'92 FZR 600
Airtech R1 kit \*/ 520 conversion \*/ 14F-47R gearing
K&N pod filters \*/ Stage 3 jet kit \*/ Factory Pro shift kit \*/ Full V&H SS exhaust
Custom '02 R6 undertail \*/ YZF gas tank \*/ Raised via dogbones \*/ custom flush turnsignals
Full R6 brake set-up \*/ SS lines \*/ Progressive fork springs \*/ ZX2 coilpack
ADD YOURSELF TO THE OFFICIAL FZRONLINE GOOGLE EARTH MAP
Airtech R1 kit \*/ 520 conversion \*/ 14F-47R gearing
K&N pod filters \*/ Stage 3 jet kit \*/ Factory Pro shift kit \*/ Full V&H SS exhaust
Custom '02 R6 undertail \*/ YZF gas tank \*/ Raised via dogbones \*/ custom flush turnsignals
Full R6 brake set-up \*/ SS lines \*/ Progressive fork springs \*/ ZX2 coilpack
ADD YOURSELF TO THE OFFICIAL FZRONLINE GOOGLE EARTH MAP
Re: Don't need choke, too rich?
No the bike is not stumbling while under load nor while free revving.
I understand that you don't need to use a choke. However if the bike idles perfect while cold once the motor warms up it would be feeding an excessive amount of fuel into the motor under closed throttle. If this means that the extra fuel is washing the oil off of the cylinder walls under deceleration causing the rings, pistons and cylinders to wear I'd like to correct what I can. If the general consensus is that it's causing no harm, all the better!
Thanks for the chart Rage! Is that a generic diagram or one specific to our style carbs?
No I don't know how many turns my mixture screws are backed out. I figured I'd get some opinions before I futzed with the fuel on a seemingly great running bike!
I understand that you don't need to use a choke. However if the bike idles perfect while cold once the motor warms up it would be feeding an excessive amount of fuel into the motor under closed throttle. If this means that the extra fuel is washing the oil off of the cylinder walls under deceleration causing the rings, pistons and cylinders to wear I'd like to correct what I can. If the general consensus is that it's causing no harm, all the better!
Thanks for the chart Rage! Is that a generic diagram or one specific to our style carbs?
No I don't know how many turns my mixture screws are backed out. I figured I'd get some opinions before I futzed with the fuel on a seemingly great running bike!
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ragedigital
- 4000+ Posts
- Posts: 4153
- Joined: Wed May 07, 2008 9:30 am
- Location: Northwest St. Louis
Re: Don't need choke, too rich?
Well, unless you're in a daily stop-n-go traffic situation, I don't believe I would be concerned.
The best way to find out though is to take it to a shop with a Dyno.
The best way to find out though is to take it to a shop with a Dyno.
Thanks for joining and participating in the most "active" FZR Community on the internet!