Front piston slap@ 17500 mi - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 4 (permalink) Old 10-05-2011, 09:07 PM Thread Starter
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Front piston [email protected] 17500 mi

I used a scope to find the slap at the v and in front of the cylinder. I checked compression and only a five lb difference with the front at 155 and the rear at 150. Slaps only when cold. But it takes 15 to 20 min to warm up in AZ heat. Coolent level is good. I'm at a loss looking for some advice.

2004 Vulcan 750
Mine on Feb 2011
with 14,000mi
now 18,000mi
bone stock and
Lovin it
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post #2 of 4 (permalink) Old 10-05-2011, 11:18 PM
If only it had 6th gear..
 
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Join Date: Jul 2011
Location: North of Boston
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Never heard of piston or wrist pin slap in these engines but it could happen I guess. Are you sure it isn't the cam chain tensioner that practically everybody at one time or another has had problems with. It would create a similar sound. Slapping, knocking etc.

Dave

Mods:
Jetted, shaved & coastered
Home made under-tank single filter
Converted ACCT's to manual (thanks wib714)
Dual vac lines on petcock (my cure for ticking)
LED tail/plate lights
Relocated helmet lock to license plate

Added stuff:
Customized hard bags w/ lights
Chrome levers
Hellcat windscreen
LED running lights
Home made 'Vita-Volt' meter
Foot rests on engine guard
Tunes

Hmm....she was on the back when we left.... ??
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post #3 of 4 (permalink) Old 10-08-2011, 07:11 PM Thread Starter
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I just used wib's mcct conversion and everything cleaned right up. I could have swore I heard piston slap. I guess I need to train my ear better

2004 Vulcan 750
Mine on Feb 2011
with 14,000mi
now 18,000mi
bone stock and
Lovin it
l3rice is offline  
 
post #4 of 4 (permalink) Old 10-08-2011, 08:01 PM
If only it had 6th gear..
 
DavesVulster's Avatar
 
Join Date: Jul 2011
Location: North of Boston
Posts: 1,100
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Nah, not your ear bro. The sound is similar to that of a piston or upper connecting rod noise because it's 'thicker' than a valve or lifter noise. Glad it worked out. Wib's conversion is a great isn't it. Quieted my chatty girl right down too. Take care.

Dave

Mods:
Jetted, shaved & coastered
Home made under-tank single filter
Converted ACCT's to manual (thanks wib714)
Dual vac lines on petcock (my cure for ticking)
LED tail/plate lights
Relocated helmet lock to license plate

Added stuff:
Customized hard bags w/ lights
Chrome levers
Hellcat windscreen
LED running lights
Home made 'Vita-Volt' meter
Foot rests on engine guard
Tunes

Hmm....she was on the back when we left.... ??
DavesVulster is offline  
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