Carb problems - Kawasaki Vulcan Forum : Vulcan Forums
LinkBack Thread Tools Display Modes
post #1 of 4 (permalink) Old 02-16-2019, 10:44 PM Thread Starter
Junior Member
Join Date: Feb 2019
Posts: 2
Carb problems

Ok guys I’ve got a 03 800 classic I’ve rebuilt the carb but it’s still flooding after the rebuild. It has V&H drag pipes no baffles stock air box, it has 135 main and 135 secondary jet and was running but very bad. wouldn’t idle long and plugs fouling out and stumbling bad at part throttle. So I tryed puting in new Float and now it want start at all and flooding even more now. So any insight would be great. Bike only has 8500 miles it sat for about 5 years.
Ran36820 is offline  
Sponsored Links
post #2 of 4 (permalink) Old 02-20-2019, 02:04 AM
Senior Member
Beans's Avatar
Join Date: Aug 2015
Location: North Vancouver
Year/Make/Model: 2005 Vulcan 800 Classic
Gender: Male
Posts: 101
Starting at the top of the bike:

1. The petcock should not release gas without the engine running on the "on" or "res" setting, on "pri" it will free flow gas. If yours is letting gas through on "on" or "res" there is an issue. Clean, rebuild, or replace the petcock. Check the tank for sediment, clean if necessary.

2. Clean the carb. Use compressed air on all the jets and passages. After you're 100% sure it's clean, clean it again.

3. Check the float needle for damage or crud, needle seat for damage or crud, and float height.

4. Confirm that the jets are the correct size. Keep in mind that the PO may have drilled them out. The stock jet size will be fine for a stock airbox with aftermarket exhaust. The slide needle isn't adjustable, but check that there aren't any washers, etc. in there. Confirm the idle screw is set to factory setting.

Start there and check back if you're still having an issue. The carb shouldn't be flooding if your petcock and float and float needle are working properly.

Never argue with a fool: onlookers may not be able to tell the difference.
Beans is offline  
post #3 of 4 (permalink) Old 02-20-2019, 06:33 AM
Top Contributor
Join Date: Aug 2012
Location: St Paul, MN
Year/Make/Model: 1995 Kawasaki Vulcan 500
Color: Black / grey
Gender: Male
Posts: 625
Flooding is a sign the float and or seat is not working.
Check that the float DOES float, and that if you shake it there's nothing getting inside it.
You can also check the if the float and seat work before you install the carbs back on the bike.
If that all checks fine, then you might have an enlarged jet that just isnt the right size.

To view links or images in signatures your post count must be 1 or greater. You currently have 0 posts.
1995 en500 stock with windshield - 30,000 miles
To view links or images in signatures your post count must be 1 or greater. You currently have 0 posts.
vulcandoc is online now  
post #4 of 4 (permalink) Old 02-20-2019, 03:45 PM
Top Contributor
btom's Avatar
Join Date: Mar 2016
Year/Make/Model: '05
Displacement/CC's: 800
Gender: Male
Posts: 1,138
what year is your 800? over time that rubber vacuum line that runs from carb to petcock can start to crack, it might need replacing with a new hose, also check your fuel line hose, that also can develop dry rot cracks

Thunder Mfg teardrop 40's K&N 170MJ 48PJ 2.75turns DynoJet Needle DNO106 2nd notch V&H Cruzers Aeromach risers Michelin Commander IIs Wix 51358 filter 17T/40 Sprockets, 2357 rear bulbs
btom is offline  
Sponsored Links

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Similar Threads
Thread Thread Starter Forum Replies Last Post
carb problems kh99 Vulcan 800 6 08-08-2015 09:51 AM
1999 VN1500A dual carb needle question and rich idle problem thewitz Vulcan 1500 0 04-30-2015 08:52 PM
Is is a carb problem? sydfarfus55 Engine Work 8 04-09-2012 10:51 PM
Will 500LTD Carb work on non-LTD bike? pgf4374 Vulcan 500 2 03-03-2012 09:18 AM
Carb Parts biglig67 Vulcan 1500 2 07-30-2010 10:43 AM

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
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome