front cylinder not hot, rear ok...... - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 10 (permalink) Old 05-15-2013, 02:10 PM Thread Starter
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front cylinder not hot, rear ok......

Good afternoon all.....I have an "86 vulcan 750 , and the front exaust never seems to get hot....Rear is normal.......wondering if carb has an issue....it ran great last season, but just started up for this season. It Starts easily, and seems to idle fine, but frt cyl exaust very cool. Tried a ride to see if I could get it to heat up, but no change........was stored with full tank and stabil all winter......any thoughts.....You guys always have the answers, so I'm hoping you can bail me out on this one.......Thanks as always......photobuff4u
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post #2 of 10 (permalink) Old 05-15-2013, 02:14 PM
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Good afternoon all.....I have an "86 vulcan 750 , and the front exaust never seems to get hot....Rear is normal.......wondering if carb has an issue....it ran great last season, but just started up for this season. It Starts easily, and seems to idle fine, but frt cyl exaust very cool. Tried a ride to see if I could get it to heat up, but no change........was stored with full tank and stabil all winter......any thoughts.....You guys always have the answers, so I'm hoping you can bail me out on this one.......Thanks as always......photobuff4u
How do the spark plugs look up front? Could be that cylinder is running richer than the rear. If it is running richer, the plugs could be black. Take a look and let us know.

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post #3 of 10 (permalink) Old 05-15-2013, 04:42 PM
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What blaz said, pull the front plugs. And if they're full of gas your float is probably stuck

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post #4 of 10 (permalink) Old 05-18-2013, 07:29 PM Thread Starter
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Hi everyone, pulled the plugs and they are gas soaked. There was plenty of spark from both plugs leads in the front, guess the floats may be the culprit. I have to get inside those carbs and check it out. Would a good dose of cleaner in the tank maybe free up the float, or do you think it may be more. thanks in advance.
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post #5 of 10 (permalink) Old 05-18-2013, 08:51 PM
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Last time I took care of a stuck float by draining the float bowl and shooting carb cleaner up there and tapping on it with the handle of a screwdriver. I cleaned the plugs and fired it up.
Hopefully this will work and you won't have to pull the carbs.

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post #6 of 10 (permalink) Old 05-18-2013, 09:18 PM
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Try doing a backblow of the carb before inundating it with chemicals....there is a sticky about it right up top of this section...overdoing carb cleaners and such can often be detrimental. Its a quick, simple proceedure, and oft solves the problem.

Note too....check your oil level...often when a float sticks and floods, excess gas will work itself into the crancase....if you have gas in the oil, change it and the filter...the slight residual will leave thry the crank breather....too, the front cyl uses the lower of the 2 pickup coils....if your oil level is too full, it can cause the front not to fire.




Last edited by Wolfie; 05-18-2013 at 09:22 PM.
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post #7 of 10 (permalink) Old 05-19-2013, 02:01 PM
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Quote:
Originally Posted by photobuff4u View Post
Hi everyone, pulled the plugs and they are gas soaked. There was plenty of spark from both plugs leads in the front, guess the floats may be the culprit. I have to get inside those carbs and check it out. Would a good dose of cleaner in the tank maybe free up the float, or do you think it may be more. thanks in advance.
I had the same problem.. found a pin hole in my float.
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post #8 of 10 (permalink) Old 05-19-2013, 07:33 PM Thread Starter
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Woolfie could you tell me the procedure to backblow the carb...would certainly be grateful....Thanks as always.....Photobuff4u
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post #9 of 10 (permalink) Old 05-19-2013, 08:06 PM
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Woolfie could you tell me the procedure to backblow the carb...would certainly be grateful....Thanks as always.....Photobuff4u
Look here
https://www.vn750.com/forum/showthread.php?t=25458

JM2001

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post #10 of 10 (permalink) Old 05-19-2013, 09:04 PM
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did you check compression? I just had the exact same symptoms and it was an exhaust valve that flew away.

kenny

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