Tune and Neutral Problem - Kawasaki Vulcan Forum : Vulcan Forums
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post #1 of 27 (permalink) Old 07-24-2018, 05:44 PM Thread Starter
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Question Tune and Neutral Problem

Hello fellas, new to the forum, i just purchased a kawa VN800 yesterday, its a 1995 has 39k Miles on it. she seems fine but i have 2 issues with it:
1- No neutral light when bike its on neutral and need to pull clutch to start her up.
Where can i find the switch and what you guys (more knowledge than me) can adv me.
2- Bike has Cobra exhaust, stock air filter and box; runs fine, cruised up to 90mph, pulls normal but smell like gas a lot, has no gas leak and backfire a lot when decelerating, smooth throttle , quick response.
Where should i start here?

Thanks, all comments are welcome, already planing to do an oil&filter and spark plug change.
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post #2 of 27 (permalink) Old 07-25-2018, 10:18 AM Thread Starter
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neutral switch sensor fixed, its located on the rear lower part of the engine, it looks like the oil switch one but smaller in case someone else use this thread as guide. my cable was unplug, plug it in and neutral light comes on, and no need to pull clutch to start.
i guess that with the carb i will need to open it, and re-jet it, any ideas which size of jet should i use for stock bike with cobra exhaust, and which in case i decide to add and aftermarket air cleaner? and where i can get the seal set? thanks
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post #3 of 27 (permalink) Old 07-26-2018, 03:27 PM Thread Starter
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any recommendations?
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post #4 of 27 (permalink) Old 07-28-2018, 12:06 PM
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If the bike is stock except for the exhaust then I would say just stick with stock jet sizing. If you go with an aftermarket air intake then you will need to re-jet for sure. Which seals do you mean? A carb rebuild kit?

Never argue with a fool: onlookers may not be able to tell the difference.
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post #5 of 27 (permalink) Old 07-30-2018, 10:30 AM Thread Starter
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Quote:
Originally Posted by Beans View Post
If the bike is stock except for the exhaust then I would say just stick with stock jet sizing. If you go with an aftermarket air intake then you will need to re-jet for sure. Which seals do you mean? A carb rebuild kit?
yes, all the gasket or rubber parts, thanks for the reply. i also notice that the inlet elbow on the car its broken and hose was putted there bend, i order one of the metal one to do the job and replacing it, just hoping its not starving on gas; i also notice that shoots flame out of the carb some times
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post #6 of 27 (permalink) Old 07-30-2018, 04:18 PM Thread Starter
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question does having a k&N filter count as a MOD? just the round filter the box its stock.
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post #7 of 27 (permalink) Old 07-31-2018, 12:45 AM
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I can't say specifically if you need to re-jet with a K&N filter, but it sounds like your bike may be running lean. Backfiring is a common symptom of a lean condition. You could pull your plugs and see what color they are.

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post #8 of 27 (permalink) Old 07-31-2018, 09:12 AM
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Pull your carb and see if the jest are stock: main 135 & pilot 48; Also note how many turns out your air screw is--this is important so mark the screw and slowly turn it in clockwise and count the number or turns

If your bike has a stock intake and only a K&N you should be able to tweak it without changing jet sizes

Clean carb to PRISTINE condition while it is off even if it doesn't need it! Beans is right; backfiring is usually a lean condition--but we need to know what jet sizes you currently have and the position of air screw

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post #9 of 27 (permalink) Old 07-31-2018, 09:19 AM
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Also while your carb is off turn your petcock to ON and RES--neither position should drip ANY gas out of it--only Prime position should flow gas
Do you know if the valves were adjusted? If not you need to check their clearances w/39K miles on it

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post #10 of 27 (permalink) Old 07-31-2018, 01:38 PM Thread Starter
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done that, pet on ON or RES no gas dripping, carb is out, screw was 3.5 turn out, jets are stock 48 and 135, i just replace the elbow inlet for the gas because it was broken and the gas line was tight, didn't like how it looked, it was kind of restricting the gas in, i put also the screw on 2 1/4 turns from close and still have not put it back on the bike, i think i will get some bigger jets for it, just to be secure, what you guys think?
valve adjustment haven't done it, will replace the plugs as well in a bit, will post some updates, will try to look a shop here in Las Vegas NV who doesn't want a leg to have it done.

I also notice that my Needle-Jet is not stick because it have some lines where you can move the pin to rise it, it was on the second i move it to the third line.

Last edited by doitmanny; 07-31-2018 at 01:51 PM.
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