Technical Discussion Topics related to Technical Issues

Hawks keeps dying at idle

Old 08-27-2012, 06:13 PM
  #1  
Member
Squid
Thread Starter
 
Alterego's Avatar
 
Join Date: Jul 2012
Location: Richmon VA
Posts: 41
Alterego is on a distinguished road
My Hawk keeps dying at idle

I have a 98 Superhawk (just got it) that is stock other than a set of Scorpion slip ons. My problem begins once the engine is warmed up. It will idle smooth at 1100rpm and just stop. It does not slow or make any noises, it just shuts off with in a minute or two. There are no other problems with the way it runs but, its just very annoying to have it cut off while at a stoplight in traffic. I have it at the dealership now to have the jetting checked and a general check over and the Tech says the bike runs perfect and does not seem to need jetting. Anyone have any other ideas?

Last edited by Alterego; 08-27-2012 at 06:36 PM.
Alterego is offline  
Old 08-27-2012, 06:40 PM
  #2  
Junior Member
Squid
 
peterdamian2000's Avatar
 
Join Date: May 2008
Location: McDonough, GA
Posts: 15
peterdamian2000 is on a distinguished road
hey there alterego...

when i bought my 2000 vtr, one of the first things i did was install d&d slip ons and a k&n air filter. the thing was soooo lean, that it was basically stalling just sitting there...like yours.
now, i know that these bikes (as do all) run and are jetted lean from the factory. works pretty well with stock stuff. but start altering and adding more flow, especially air and exhaust, and you have what you have.

try getting and installing a stage 1 jet kit and at the same time have the carburetors synched. the jet kit (air filter, exhaust slip ons or neither), will wake that bike up and make it run the way it is meant to run. you WILL NOT regret it.

sounds like your hawk is running leaner with those slip ons and causing your issue. again, stage 1 kit and synching those carbs will wake that monster up.

let me know when you get it done and how it feels.
peterdamian2000 is offline  
Old 08-27-2012, 08:25 PM
  #3  
aja
Senior Member
SuperSport
 
aja's Avatar
 
Join Date: Nov 2011
Posts: 700
aja is on a distinguished road
That's partly good advice.

K&N filters are problematic for the hawk, as are the dynojet kits. I'd stay with the OEM air filter and read the Carb set up thread and use those settings.

If it idles decently at 1100 it shouldn't stall out just from being lean. Could need just a sync, but check all vacuum hoses and Carb boots also
aja is offline  
Old 08-28-2012, 07:20 AM
  #4  
Senior Member
SuperBike
 
Join Date: Oct 2007
Location: Menifee, CA
Posts: 1,082
HRCA#1 is on a distinguished road
Cool

Originally Posted by aja View Post
That's partly good advice.

K&N filters are problematic for the hawk, as are the dynojet kits. I'd stay with the OEM air filter and read the Carb set up thread and use those settings.

If it idles decently at 1100 it shouldn't stall out just from being lean. Could need just a sync, but check all vacuum hoses and Carb boots also
+1 on what AJA said, also check your TPS should be 500 or less and will help with your problem.

All of this information is readily available in the Knowledge Base.
HRCA#1 is offline  
Old 08-28-2012, 07:22 AM
  #5  
Member
Squid
 
Join Date: Jan 2012
Location: Wisconsin
Posts: 45
Ons'Ro is on a distinguished road
I just experienced similar symptoms and I ended up rebuilding the petcock. The diaphram was bad and wouldn't flow all the time causing a lean condition at idle. I haven't had it stall since.
Ons'Ro is offline  
Old 08-28-2012, 10:42 AM
  #6  
Member
Squid
Thread Starter
 
Alterego's Avatar
 
Join Date: Jul 2012
Location: Richmon VA
Posts: 41
Alterego is on a distinguished road
Thanks for everyone's help. I'll check this stuff over and let you know what I figure out.
Alterego is offline  
Old 08-28-2012, 11:56 AM
  #7  
Senior Member
Back Marker
 
kardiac996's Avatar
 
Join Date: Jun 2012
Location: Hagerstown, MD
Posts: 211
kardiac996 is on a distinguished road
I found a new set of spark plugs in mine did wonders. They were covered in black jive from being to rich for years now that im leaned out, a nice brown film has formed proving my tune is good. Prior I had blippy issues at idle but not anymore!
kardiac996 is offline  
Old 08-29-2012, 01:33 PM
  #8  
Banned
MotoGP
 
Join Date: Aug 2007
Location: Lake View Terrace, CA
Posts: 5,942
8541Hawk will become famous soon enough
Originally Posted by HRCA#1 View Post
+1 on what AJA said, also check your TPS should be 500 or less and will help with your problem.

All of this information is readily available in the Knowledge Base.
That's the one..... check the TPS and also I would check the plugs while you were at it like was also posted....
8541Hawk is offline  
Old 09-03-2012, 11:05 AM
  #9  
Member
Squid
Thread Starter
 
Alterego's Avatar
 
Join Date: Jul 2012
Location: Richmon VA
Posts: 41
Alterego is on a distinguished road
Got it back from the shop and the mechanic said it was one of best running hawks he has seen. But, while riding home it did stall while at idle sitting at a red light. Plugs are good idle is set correctly and they said everything is good with the carbs.
Alterego is offline  
Old 09-03-2012, 11:44 AM
  #10  
Senior Member
SuperBike
 
Wicky's Avatar
 
Join Date: Sep 2008
Location: Essex, UK
Posts: 1,638
Wicky is on a distinguished road
Balance the carbs and if it persists raise the idle a notch to 1200.
Wicky is online now  
Old 09-03-2012, 11:51 AM
  #11  
Senior Member
SuperBike
 
Join Date: Oct 2007
Location: Menifee, CA
Posts: 1,082
HRCA#1 is on a distinguished road
Did you adjust the TPS yet?
HRCA#1 is offline  
Old 09-03-2012, 12:13 PM
  #12  
Senior Member
SuperBike
 
Erik S.'s Avatar
 
Join Date: Nov 2007
Location: Westerly, RI
Posts: 1,216
Erik S. is on a distinguished road
Originally Posted by Wicky View Post
Balance the carbs and if it persists raise the idle a notch to 1200.
Spot on. Roger told me that is where the idle should be for the SH.
Erik S. is offline  
Old 09-03-2012, 01:38 PM
  #13  
Member
Squid
Thread Starter
 
Alterego's Avatar
 
Join Date: Jul 2012
Location: Richmon VA
Posts: 41
Alterego is on a distinguished road
Originally Posted by HRCA#1 View Post
Did you adjust the TPS yet?

Got to do a search on how to do that but it's next on the list of things to try.
Alterego is offline  
Old 09-03-2012, 01:47 PM
  #14  
Member
Squid
Thread Starter
 
Alterego's Avatar
 
Join Date: Jul 2012
Location: Richmon VA
Posts: 41
Alterego is on a distinguished road
Dang the TPS adjustment sounds a little intimidating.
Alterego is offline  
Old 09-03-2012, 01:50 PM
  #15  
Senior Member
MotoGP
 
7moore7's Avatar
 
Join Date: Jul 2010
Location: Phoenix, AZ
Posts: 3,867
7moore7 is on a distinguished road
Have you taken the carbs off ever? And do you have a dremel and multimeter?
7moore7 is offline  
Old 09-03-2012, 02:02 PM
  #16  
Member
Squid
Thread Starter
 
Alterego's Avatar
 
Join Date: Jul 2012
Location: Richmon VA
Posts: 41
Alterego is on a distinguished road
Originally Posted by 7moore7 View Post
Have you taken the carbs off ever? And do you have a dremel and multimeter?
No have not taken them off before. I don't a dremel and only a shitty multimeter. I may just have to pick some up and take a crack at it and see how it goes.
Alterego is offline  
Old 09-03-2012, 04:22 PM
  #17  
Senior Member
SuperBike
 
Join Date: Oct 2007
Location: Menifee, CA
Posts: 1,082
HRCA#1 is on a distinguished road
You can get a decent digital multimeter at Sear, Lowes,Home Depot and many others for $20.00 or less. If you remove the pair system it can be done without even pulling the carbs and you get to throw the pair system away at the same time
HRCA#1 is offline  
Old 09-03-2012, 06:00 PM
  #18  
Senior Member
MotoGP
 
nath981's Avatar
 
Join Date: Aug 2006
Location: altoona, pa
Posts: 2,934
nath981 is on a distinguished road
Originally Posted by Alterego View Post
No have not taken them off before. I don't a dremel and only a shitty multimeter. I may just have to pick some up and take a crack at it and see how it goes.
Please don't take this the wrong way and it may not even be the case. It sounds like you don't have much mechanical savvy, so you need to determine whether you want to start messing with internals because you can screw **** up fast and essentially multiply your problems not to mention needless monetary expenses. I've seen it happen.

If you can find a friend who has experience wrenching, it might be prudent to ask for help. Otherwise, there may be other Hawk owners around Richmond who would be willing to lend a hand.

If you do decide to tackle this, as you can see, there are helpful hands on board, just take it slow and easy.
nath981 is offline  
Old 11-01-2012, 07:45 PM
  #19  
Junior Member
Squid
 
Garbanzo's Avatar
 
Join Date: Aug 2011
Posts: 5
Garbanzo is on a distinguished road
I had the same problem. remove the rear cylinder vaccume line at the cylinder. Leave the other end attached to the fuel valve petcock under the rear of the tank. Apply suction to the line and see if it holds vaccume. If it leaks pressure - the fuel valve petcock needs to be rebuilt. If the diaphram has a hole in it, the fuel is being shut off from the tank to the carbs resulting in low idle stalls and a rough idle.
Garbanzo is offline  
Old 11-02-2012, 06:48 AM
  #20  
Member
Squid
Thread Starter
 
Alterego's Avatar
 
Join Date: Jul 2012
Location: Richmon VA
Posts: 41
Alterego is on a distinguished road
Thanks for everyone's help my Hawk is running top notch now!! New spark plugs, set TPS and away it goes.
Alterego is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
thedeatons
Technical Discussion
14
06-21-2015 09:11 PM
Lukasz Kowalczyk
Technical Discussion
4
05-12-2013 04:55 AM
cliby
Motorcycle News
7
03-29-2007 12:57 PM
DaxMiddler
Technical Discussion
8
04-28-2006 03:22 AM
senecagreen
General Discussion
15
04-20-2006 05:52 PM


Thread Tools
Search this Thread
Quick Reply: Hawks keeps dying at idle


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.