1992 vn750 help - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 6 (permalink) Old 07-29-2012, 12:31 PM Thread Starter
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1992 vn750 help

Hey guys, picked up a 92 750 vulcan. Got it running good but seems to be "sluggish". It runs fine, just does not have the power that it should have. Don't know much about (just got this one) it but there is a aftermarket exhaust, possible they didn't change the jets. Any ideas
Thank you!!!
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post #2 of 6 (permalink) Old 07-29-2012, 12:41 PM Thread Starter
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opps posted in wrong forum sorry all
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post #3 of 6 (permalink) Old 07-29-2012, 01:09 PM
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Could be any number of things really. Normally, aftermarket exhaust does not require a jet change unless the intake has been modified.

I would suggest looking at the spark plugs. Fowled plugs tend to lead to poor performance. Get a can of Seafoam and dump half the can in a full tank of gas. That will clean up fuel lines and the carbs. Check the air filters, clogged filters causes a rich condition which leads to poor performance.

Check and fix the list above and let us know if the bike is still performing poorly.

Good luck.

I only understand what I don't understand.
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post #4 of 6 (permalink) Old 07-29-2012, 06:36 PM
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Quote:
Originally Posted by blazblu82 View Post
Could be any number of things really. Normally, aftermarket exhaust does not require a jet change unless the intake has been modified.

I would suggest looking at the spark plugs. Fowled plugs tend to lead to poor performance. Get a can of Seafoam and dump half the can in a full tank of gas. That will clean up fuel lines and the carbs. Check the air filters, clogged filters causes a rich condition which leads to poor performance.

Check and fix the list above and let us know if the bike is still performing poorly.

Good luck.
Ya what he said!
A good tune up goes a long way! The NGK wire ends suck.. un-corkscrew the caps from the wires & check continunity.. I have found these bad before.
Also do a quick compression test to make sure nothings going on internally.. as long as you've got good compression, good ignition & good fuel / air you'll have a good running machine. If you're lacking in power one of these 3 elements need some attention.

1996 KAW VN750
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NO MODS - I ain't gunna cut things that weren't meant to be cut on!
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post #5 of 6 (permalink) Old 07-30-2012, 11:54 AM Thread Starter
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Thank you everyone for the help. I found the problem the guy replaced some vac and fuel lines, but the lines he changed were way too long and found 3 that were pinched off. Change these lines and put 100 miles on it. running like a champ. Again THANK YOU!
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post #6 of 6 (permalink) Old 07-30-2012, 02:26 PM
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Very Cool!
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