New to forum, help with jetting. - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 26 (permalink) Old 12-14-2016, 11:23 PM Thread Starter
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New to forum, help with jetting.

Hello everyone I'm a new member to the forums but not new too working on bikes and wrenching like a mofo, I had the wonderful chance to aquire an 04 Kawasaki Vulcan750 for 300 bucks with title. They bike has v&h cruisers and had pods but the cheapo ones but I tossed em. I have the original air box plenum, ears and hoses all installed, all stock but the pipes and old k&n filters in the ears. I'm at about 24' above sea level and she's running 145 mains and 38 pilots, I plan on getting new foam air filters. They bike ran ok when I cleaned the carbs up but hard as hell to get started and once it did I'd hit a flat spot around 3k to 4500 rpm, I was wondering if anyone could chime in on what would be the best jetting to run with my setup, stock box, ears, foam filters and v&h cruzers. I also have installed the iridium plugs. I did some reading and researching and seen a fella with the same setup and he was told to go 135 mains and 40 pilots @ 1200ft above sea level. To anyone who could point me in the right direction and give me some suggestions I'd greatly appreciate it. Thanks

Matt
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post #2 of 26 (permalink) Old 12-15-2016, 12:15 AM
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I think stock was 138...
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post #3 of 26 (permalink) Old 12-15-2016, 08:13 PM
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Originally Posted by TalkinVulcan View Post
Hello everyone I'm a new member to the forums but not new too working on bikes and wrenching like a mofo, I had the wonderful chance to aquire an 04 Kawasaki Vulcan750 for 300 bucks with title. They bike has v&h cruisers and had pods but the cheapo ones but I tossed em. I have the original air box plenum, ears and hoses all installed, all stock but the pipes and old k&n filters in the ears. I'm at about 24' above sea level and she's running 145 mains and 38 pilots, I plan on getting new foam air filters. They bike ran ok when I cleaned the carbs up but hard as hell to get started and once it did I'd hit a flat spot around 3k to 4500 rpm, I was wondering if anyone could chime in on what would be the best jetting to run with my setup, stock box, ears, foam filters and v&h cruzers. I also have installed the iridium plugs. I did some reading and researching and seen a fella with the same setup and he was told to go 135 mains and 40 pilots @ 1200ft above sea level. To anyone who could point me in the right direction and give me some suggestions I'd greatly appreciate it. Thanks

Matt
How about a short introduction under the Newbie Check-In section?

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post #4 of 26 (permalink) Old 12-15-2016, 09:05 PM
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Originally Posted by slimvulcanrider View Post
I think stock was 138...
138/38

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post #5 of 26 (permalink) Old 12-15-2016, 11:26 PM
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How about a short introduction under the Newbie Check-In section?
I thought that was a great introduction.. who cares if it was in the wrong section...
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post #6 of 26 (permalink) Old 12-16-2016, 05:09 AM
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post #7 of 26 (permalink) Old 12-16-2016, 06:46 AM
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Flat spot at 3k is likely due to the pilot jet. As mentioned a 38 is stock.Try a 40.

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post #8 of 26 (permalink) Old 04-23-2017, 06:57 PM Thread Starter
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Flat spot at 3k is likely due to the pilot jet. As mentioned a 38 is stock.Try a 40.
Went up to 40s and a world of difference, but no air filters at all.
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post #9 of 26 (permalink) Old 04-23-2017, 07:46 PM Thread Starter
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Bike runs great once warm and I open it up on the road, I just do short runs in the neighborhood due to the fact I have no air filtration, but idle and warmup is another story, choke makes the front cylinder pop, bang and blue flames, rear cyl runs strong and sounds healthy as can be, its almost like at idle I have just the rear cyl helping the limping front cylinder until I open the throttle. I think I either have valve issues, ignitor box issues, coil issues, or carb demons idk. I plan to get mcct, and doing the "relay mod?" I think its called. Also got some new ex manifold to header gaskets, smartparts baffles, and air filters otw. In short the bike rides great and pulls to 8k no problem, at idle I have a trumpet spumdimg right pipe the pops and bangs and a left that sounds great, carbs that puff back every so often durimg warm up with choke. Will keep an updated sitrep until this thing runs like a top.Thanks to any and all replies and suggestions.
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post #10 of 26 (permalink) Old 04-23-2017, 09:29 PM
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sounds like a dirty float needle on the front carb and it's flooding out

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rejetted for K/N Pods part#rc 2340
sportster seat
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