Kawasaki VN750 Forum banner


  1. Air through carbs when cranking, very odd issue

    Carbs and Fuel System
    Hey everyone, I have a very strange issue with the front cylinder of my 1990 Vulcan. When I try and start the bike, after a few cranks, there will be a loud noise followed by a faint bit of smoke/air forcefully shooting out the intake on the carbs. The engine will also kick back and temporarily...
  2. Good single carb conversion option?

    Carbs and Fuel System
    I have searched and found some single carb conversions that seem to work, but just curious if anyone has done it successfully and it look good too. I have 2 Vulcans, a 700 and a 750 and I also have a 750 parts bike. I'm asking this because one of the carbs has a broken center plate and looks...
  3. Thunder Products Carb Mods

    Carbs and Fuel System
    Ok so quick question for all of ya, have any of you guys ever tried products or more specifically the carburetor products from this company before? the website is at thunderproducts.com if anyone has any info on these please let me know, some of these things seem like they could really work and...
  4. Want to buy carburetors

    Sell or Swap
    Is there someone that got a carburator with number V147 YB15 for sale? Need the one that goes to the front cylinder if there is any difference between them. I might buy the entire butterfly if needed, as long as they are working, it is possible to turn the pilot mixing screws and the price is...
  5. Engine won't rev above 4K after carb clean

    Carbs and Fuel System
    My bike was running fine, but backfiring a lot while decelerating. Seemed like at times it was not idling quite right. I pulled the carb and cleaned it out. I replaced the diaphragms with the JB industries one. I put it all back together and it started up and ran great. I jumped on the bike and...
  6. Did the ear shave, now my bike won't start

    Carbs and Fuel System
    Howdy. I got my 89 Vulcan last July or August and rode it for about a month before deciding to start working on it over the winter. I cleaned out the gas tank (I'll post my thoughts on the methods of doing so once I get it running again), put in Iridium plugs, and did the Ear Shave, and now it...
  7. Newbie with vacuum problems

    Carbs and Fuel System
    Bought an 89 vn750 about a month ago. Been playing with it alot. Sat for eight months before I got it. Got the carbs cleaned and bench synced, ran great for awhile. Ordered a new gas tank as the one on it had pinholes. Got that installed along with another carb cleaning to go along with new...
  8. Get to the bottom of front cylindar thump

    Engine / Exhaust / Cooling
    I've seen several people that seem to have the same or similar condition I have. At idle, my front cylinder seems to thump or just pump harder than my rear. (that sounded kinda funny). So my thoughts are: 1. Plugs, but no, I've used two different kinds, iridium and regular and even iridium on...
  9. Rebuilt 2003 Vulcan 750 engine

    Carbs and Fuel System
    We rebuilt the engine due to a coolant leak in the rear head. New gaskets and cleaned carb. We put everything back together and double checked the timing. Now when starting, it will fire up and run cold without adding choke. When it gets warm, it backfires. When turned off, it doesn't start...
  10. cvk34 size..

    Carbs and Fuel System
    Hi guys new here, I need to fit a restrictor in my carb (stupid law) but to get one made I need to know the outer diameter of the carb where it fits into the inlet rubber which is bolted to the engine. Also does anyone else get an electric shock off the ht lead on the left?
  11. Vulcan will not stay running.

    Carbs and Fuel System
    I have a 1999 Vulcan 750 with no modifications. I had an issue about a month ago when starting the bike to come home from work. The bike cranked fine and ran with choke on for about 1 minute. I let the choke off and the bike was fine. I put the kick stand up, put it into gear and the bike died...
  12. Carb Synching High Idle video overview

    Carbs and Fuel System
    Ok, I realized I had an extra carb so I wanted to figure out why my idle was so high after synching my carbs. Well, it makes sense if you watch the video. Also, I tested for air leaks and found none using propane and WD40. The propane thing is kinda scary yo. Video is here...
  13. Need to rejet

    Carbs and Fuel System
    Changed to K&N high flow ait filters (no earshave) and removed the square rubber grommets from the airbox intake to help improve airflow. Even with the air/fuel mixture screw 3 1/2 turns out the plugs are still a little light in both cylinders and I'm getting an occasional backfire (usually...
  14. Removing and cleaning carb

    Carbs and Fuel System
    So i need to remove and clean the carb on my 1998 vn750. Doe's anyone have any videos that would show me how to do this step by step. Or can anyone explain it to me. From actually removing it from the bike to cleaning it. I want her to run strong for me again ;)
  15. Returning to the Vulcan forum after long absence.

    New Member Introductions
    Hello everyone, I'm returning to the Vulcan forum after long absence. My 1995 VN750 was sitting with the carbs off for a couple of years. I finally got around to cleaning them and getting them back on the bike. I knew it was going to be a pain getting the carbs back on, I guess that one reason...
  16. Carburetor compatibility?

    Carbs and Fuel System
    It looks like my bike needs a new carburetor, so I am out searching for one and would like to know what my options are. I have a 2001 vn750 and would like to know what other year carbs would be compatible with mine. If someone has a list, it would be highly appreciated. Thanks.
  17. Front carb filling cylinder. Help!

    Carbs and Fuel System
    Hi guys new to this site. Just bought a 93 Vulcan 750 with 10k miles. When I bought it, the bike ran, but ran poorly (got a good price on it.) I took off the carbs and got them professionally cleaned. The prior owner lived on a dirt road and didn't bother with air filters, so the carbs were...
  18. Fuel lines

    Carbs and Fuel System
    This may seem very silly but bear with me! I stripped down my vulcan750 in December last year, I've done a lot of work and now I'm getting ready to start the engine, however, I cannot remember where the fuel pipes go. I'v got a manual but it doesent show any diagrams, Can anyone give me an...
  19. Reminder to check the simplest thing first

    Carbs and Fuel System
    Just a friendly tale for those who are lost diagnosing problems. Learn from me! So I had a problem with my front cylinder not firing. It wasn't spark or air so I took apart the carbs. They were sparkling clean sans 2 tiny bugs that got into the front float chamber and carb bowl. With carbs...
  20. Carb Drain Screw

    Carbs and Fuel System
    I have a stripped carb drain screw part number 92009-1095. I was wondering if it was possible to replace this with a more durable screw. It seems really soft, and on the right side its difficult to get the drain screw out, so easily stripped...