noise at 3500-4000 rpm - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 8 (permalink) Old 07-06-2005, 09:11 PM Thread Starter
 
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noise at 3500-4000 rpm

I have now heard from three people, me in the us, one in the UK, and one in Finland (isn't the internet great) who are all having a "chirpy tweety" or metallic noise only between 3500 and 4000. Mine occurs only after the bike is fully warmed up and it doesn't really do it standing still.

One of you VN750 experts must be able to help. Here's your chance to show off and help people around the world.

Anyone?
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post #2 of 8 (permalink) Old 12-24-2009, 09:26 PM
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Ever figure out your noise?
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post #3 of 8 (permalink) Old 12-24-2009, 09:44 PM
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You know these aren't the quietest engines in the world. With four different chains flying around and 8 valves opening and closing, they just aren't quiet.

That's not to say you aren't experiencing some problem. Can you approximate where the sound is coming from?

The original post is over 4 years old.

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Last edited by 93VN750; 12-28-2009 at 09:16 AM.
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post #4 of 8 (permalink) Old 12-25-2009, 01:42 AM
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You weren't kidding when you said "chains flying around". I have seen video of cam chains taken from inside of running engines, and was absolutely horrified at what I saw. They were just whipping around all over the place, and that was with them tensioned properly. Another reason I have a problem with internal chains. I can't believe they last as long as they do. Jerry.

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post #5 of 8 (permalink) Old 12-28-2009, 08:52 AM
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noice at 3500 4000 rpm

hi i am gubbe from denmark, i have the same noice a loud screaming noice betwin 3500 - 4000 rpm so i always kepp it on 4000 rpm a lilltle to fast in denmark but i can live with a ticket sometimes, on you tube is a video search for ( vn 750 engine ticks ) my vn750 1986 us-modell have the same ticks to, my mc-garage say to me there is nothing wrong so i have to live with the ticks and its okay with me, can ony hear it when the engine runs slowly about 1000 rpm 1200 rpm
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post #6 of 8 (permalink) Old 12-28-2009, 10:11 PM
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i use a stethascope but a long screwdiver will do the same ... with engine running listen to diffrent points of the engine u will be able to pinpoint the noice .. specific to rpm i look toward the chains and double check the tensioners ... there are light ticks that are acceptable but any screaming metel to matel sound can never b good ...



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post #7 of 8 (permalink) Old 12-28-2009, 10:58 PM
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Does it correspond with the amount of fuel in the tank?

Mine rattles at 3100rpm when the tank is full.

I've narrowed it down to the float for the gas gauge sending unit.
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post #8 of 8 (permalink) Old 12-29-2009, 12:50 AM
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Some of us folks here had the same problem and narowed it down to the L&R tank mounts. The solution may vary, I siliconed the grommets to the inside of the tank tabs to keep them in place.

I also put some silicone grease on the metal insert that looks like a top hat, this is where the squeek occours. The outer part of the tank tab rubs against the metal insert and starts to squeek.


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Last edited by lance328; 12-29-2009 at 12:53 AM.
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