wont start in cold

kat_pilot750 · 01-11-2010, 08:56 AM

Hey guys, my 2000 750 has an issue starting in the cold. It'll initially start and run for a few seconds then die when i let off the little throttle that I use during start. When it's warm, I'll let off the throttle and the rpms will drop then go back to a normal warm up rpm for the full choke. But cold, it just dies. And after that, I can't get it started no matter what. Any suggestions?

And "cold" is 30-50 degrees-ish.

diavolo · 01-11-2010, 09:08 AM

Are you using the choke? Try setting the choke at half way, and starting her up. Adjust the choke as the rpm's increase to keep her under 2000 rpm for a few minutes, and then without any choke, she should idle in the 1100 rpm range.

kat_pilot750 · 01-11-2010, 09:58 AM

yes, I'm using full choke. Later today it should be warmer so hopefully I'll have some better luck then. I'll try usin 1/2 choke and let you know how it goes.

Thanks!

Katpilot36 · 01-11-2010, 10:27 AM

I had the same issue with my 06 600, what I did was on full choke I cranked it over a couple of seconds with no throttle and repeated that a few times. I then put it on half choke and it fired right up. After fire I put it on full choke until it warmed up. Hitting the throttle seemed to make it worse

Kreylyn · 01-11-2010, 11:29 AM

The "choke" is a fuel enrichment system. The more you pull the lever, the more extra fuel your adding.

The throttle opens the butterflies. The more you turn the throttle, the more air your adding to the sytem.

Cold engines need a richer mixture to start, and this is the reason for the enrichment sytem. If you open the throttle, your countering that by adding air.

So basicly... if opening the throttle helps you on a cold start... use less choke. Your shooting for a position that will start the bike with no throttle used at all.

Krey

ThAzKat · 01-12-2010, 05:26 AM

as a air/oil cooled bike they will be a bit tempermental to start until you find that sweet spot and remember it everytime you go to start it up. I would also do some prevenitive maintance and check/change the spark plugs. You could be flooding it by over choking. That right there will cause a even harder time starting.

kat_pilot750 · 01-19-2010, 04:22 PM

So I figured out that it was user error. I typically give it a smidge of throttle on start up and then let go of it after it cranks up. I found out that I was letting go of the throttle too early and as long as I hold the throttle for about a full second she'll stay running and not die. One of those quirks I guess

whitecl0ver · 01-19-2010, 04:46 PM

you should just ship it to FLA (pm me for address) and get a new one...

****EDIT****

n/m your in FLA, I'll come pick it up whenever your ready....

Katat33 · 01-19-2010, 05:13 PM

Just an FYI I found out while I'm working on my 1999 Kat 750. Under the tank is an inline fuel fitler...if it gets dirty it will effect cold starts. It may not have anything to do with your concerns, but hey FYI right....

kat_pilot750 · 01-20-2010, 09:14 AM

Interesting katat, i'll have to take a look at it next time I have the bike apart thanks for the tip

01-11-2010, 08:56 AM	#1
kat_pilot750 Katrider Join Date: Dec 2009 Location: Palm Bay, FL Posts: 222 iTrader: (0) My Garage	wont start in cold Hey guys, my 2000 750 has an issue starting in the cold. It'll initially start and run for a few seconds then die when i let off the little throttle that I use during start. When it's warm, I'll let off the throttle and the rpms will drop then go back to a normal warm up rpm for the full choke. But cold, it just dies. And after that, I can't get it started no matter what. Any suggestions? And "cold" is 30-50 degrees-ish. __________________ "Coffee should be black as hell, strong as death and as sweet as love."

01-11-2010, 11:29 AM	#5
Kreylyn Kat Master Supporting Member Join Date: Nov 2008 Location: Weaverville, NC Posts: 12,507 iTrader: (23) My Garage eBay ID: Kreylyn	The "choke" is a fuel enrichment system. The more you pull the lever, the more extra fuel your adding. The throttle opens the butterflies. The more you turn the throttle, the more air your adding to the sytem. Cold engines need a richer mixture to start, and this is the reason for the enrichment sytem. If you open the throttle, your countering that by adding air. So basicly... if opening the throttle helps you on a cold start... use less choke. Your shooting for a position that will start the bike with no throttle used at all. Krey __________________ 93 750 Kat Modified Swingarm, 5.5 GSXR Rear with 180/55 and 520 Chain, 750 to 600 Tail conversion, more to come. Long Term Project build thread http://katriders.com/vb/showthread.php?t=96736 "I've done this a thousand times before. What could possibly go wron.... Ooops!"

01-12-2010, 05:26 AM	#6
ThAzKat KatBusa Owner Join Date: Nov 2004 Location: Huntsville (Indian Lake), OH Posts: 9,797 iTrader: (8) My Garage eBay ID: ThAzkat93	as a air/oil cooled bike they will be a bit tempermental to start until you find that sweet spot and remember it everytime you go to start it up. I would also do some prevenitive maintance and check/change the spark plugs. You could be flooding it by over choking. That right there will cause a even harder time starting. __________________ TDA Racing/Motorsports 1982 Honda CB750 Nighthawk, 1978 Suzuki GS750 1986 Honda CBR600 Hurricane; 1978 Suzuki GS1100E; 1982 Honda CB750F supersport, 1993 Suzuki Katana GSX750FP. 1981 Suzuki GS1100E (heavily Modified) http://katriders.com/vb/showthread.php?t=94258 Who knows what is next? Builder of the KOTM Mreedohio september winning chrome project. I consider this one to be one of my bikes also! Please look at this build! http://katriders.com/vb/showthread.php?t=91192

01-19-2010, 04:46 PM	#8
whitecl0ver Kat Legend Join Date: Jul 2006 Location: TallahCRAPPY/MonticHELLo, FL Posts: 5,565 iTrader: (1) My Garage eBay ID: whitecl0ver April 2010 BOTM	you should just ship it to FLA (pm me for address) and get a new one... **EDIT n/m your in FLA, I'll come pick it up whenever your ready.... __________________ I dont have "hobbies" I'm developing a robust Post-Apocalyptic skill set....** http://www.excessivehoppyness.blogspot.com

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01-11-2010, 09:08 AM	#2
diavolo Kat Legend Join Date: Apr 2007 Location: New Jersey Posts: 3,862 iTrader: (1) My Garage eBay ID: ntdefeo	Are you using the choke? Try setting the choke at half way, and starting her up. Adjust the choke as the rpm's increase to keep her under 2000 rpm for a few minutes, and then without any choke, she should idle in the 1100 rpm range.

01-11-2010, 09:58 AM	#3
kat_pilot750 Katrider Join Date: Dec 2009 Location: Palm Bay, FL Posts: 222 iTrader: (0) My Garage	yes, I'm using full choke. Later today it should be warmer so hopefully I'll have some better luck then. I'll try usin 1/2 choke and let you know how it goes. Thanks!

01-11-2010, 10:27 AM	#4
Katpilot36 Katrider Join Date: Jun 2008 Location: Boca Raton, FL Posts: 212 iTrader: (0) My Garage	I had the same issue with my 06 600, what I did was on full choke I cranked it over a couple of seconds with no throttle and repeated that a few times. I then put it on half choke and it fired right up. After fire I put it on full choke until it warmed up. Hitting the throttle seemed to make it worse

01-19-2010, 04:22 PM	#7
kat_pilot750 Katrider Join Date: Dec 2009 Location: Palm Bay, FL Posts: 222 iTrader: (0) My Garage	So I figured out that it was user error. I typically give it a smidge of throttle on start up and then let go of it after it cranks up. I found out that I was letting go of the throttle too early and as long as I hold the throttle for about a full second she'll stay running and not die. One of those quirks I guess

01-19-2010, 05:13 PM	#9
Katat33 Squid Join Date: Oct 2008 Location: 91709 Posts: 27 iTrader: (0) My Garage	Just an FYI I found out while I'm working on my 1999 Kat 750. Under the tank is an inline fuel fitler...if it gets dirty it will effect cold starts. It may not have anything to do with your concerns, but hey FYI right....

01-20-2010, 09:14 AM	#10
kat_pilot750 Katrider Join Date: Dec 2009 Location: Palm Bay, FL Posts: 222 iTrader: (0) My Garage	Interesting katat, i'll have to take a look at it next time I have the bike apart thanks for the tip

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