KOTM Apr 2009 greeneyedream

Welcome to the KatRiders.com forums.

You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

If you have any problems with the registration process or your account login, please contact contact us.

Go Back   KatRiders.com > Service Department > Mechanics 101

Mechanics 101 Can't get it to run right? Find a trick to add HP?
From the first oil change to completely rebuilding the engine,
this is the place to talk about the heart of the beast!

Thread Tools Display Modes
Old 01-11-2010, 07:56 AM   #1
kat_pilot750's Avatar
Join Date: Dec 2009
Location: Palm Bay, FL
Posts: 235

Default 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."
kat_pilot750 is offline   Reply With Quote
Old 01-11-2010, 08:08 AM   #2
Kat Legend
diavolo's Avatar
Join Date: Apr 2007
Location: New Jersey
Posts: 3,918
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.
diavolo is offline   Reply With Quote
Old 01-11-2010, 08:58 AM   #3
kat_pilot750's Avatar
Join Date: Dec 2009
Location: Palm Bay, FL
Posts: 235


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.

kat_pilot750 is offline   Reply With Quote
Old 01-11-2010, 09:27 AM   #4
Katpilot36's Avatar
Join Date: Jun 2008
Location: Boca Raton, FL
Posts: 210


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
Katpilot36 is offline   Reply With Quote
Old 01-11-2010, 10:29 AM   #5
Kat King
Kreylyn's Avatar
Join Date: Nov 2008
Location: Weaverville, NC
Posts: 15,798
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.

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!"
Kreylyn is offline   Reply With Quote
Old 01-12-2010, 04:26 AM   #6
KatBusa Owner
ThAzKat's Avatar
Join Date: Nov 2004
Posts: 9,844
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
ThAzKat is offline   Reply With Quote
Old 01-19-2010, 03:22 PM   #7
kat_pilot750's Avatar
Join Date: Dec 2009
Location: Palm Bay, FL
Posts: 235


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
kat_pilot750 is offline   Reply With Quote
Old 01-19-2010, 03:46 PM   #8
Kat Legend
whitecl0ver's Avatar
Join Date: Jul 2006
Posts: 5,563
eBay ID: whitecl0ver

April 2010 BOTM


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


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....

whitecl0ver is offline   Reply With Quote
Old 01-19-2010, 04:13 PM   #9
Katat33's Avatar
Join Date: Oct 2008
Location: 91709
Posts: 27


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....
Katat33 is offline   Reply With Quote
Old 01-20-2010, 08:14 AM   #10
kat_pilot750's Avatar
Join Date: Dec 2009
Location: Palm Bay, FL
Posts: 235


Interesting katat, i'll have to take a look at it next time I have the bike apart thanks for the tip
kat_pilot750 is offline   Reply With Quote
Sponsored Links

  KatRiders.com > Service Department > Mechanics 101


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Wont start and I dont know where to start Roy33 Mechanics 101 17 07-25-2011 06:51 PM
Cold start smokeshow81 How to Q&A 11 06-18-2009 09:05 PM
cold start problem fastfreddy Mechanics 101 4 04-11-2008 12:34 AM
Lots of problems(Wont Start/ Clutch wont disengage) CantFocus Mechanics 101 14 01-13-2008 10:55 PM
Cold Start IndyGunner Suzuki Katana Talk 18 01-12-2008 11:27 PM

All times are GMT -5. The time now is 03:27 AM.

Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Katriders.com, Copyright ©2004 - 2018

Like Cigars? Check out Vitola.org