Vesp GTS 300 Engine noise cold By gord (Read 4,855 times)

[gord]

   Please help. New guy here. Have a 2013 gts vesp. At 100 miles developed a cold "piston slap" type noise, can be heard directly at cylinder with stethoscope, goes away after a few minutes of riding. Not comming from transmission side of case, but right at cylinder. I can hear it from 20 feet away idling. Dealer tried to sell me a valve adjustment, so I did it myself. Perfect valve lash set at .004 int, and ,006 exh. Dealer says live with it. Bike sat for about 8 months at dealer before I bought it. Did the first oil and filter change, at 630 mi, nothing unusual to report in the screen. I am an Auto Mech by trade, and if this is normal I cannot believe it, sounds just like piston slap to me, then goes away hot. Not comming from variator rollers. I am particular and don't want the dealer ripping my ride apart, am about to do it myself/ any experiences or help would be greatly appreciated, thank you, Gord

[Alleyoop]

Well not to many manufactuers match up cylinders and pistons anymore to same money so I would not be surprised. But even the cheap scoots do not have that problem so I would question are you sure it is not the valves that are to loose. Nice guy the dealer by the way, live with it since piston slap will usually result in a rebuild because it will damage the walls and rings.
Alleyoop

[Bashan]

How's the compression? Maybe rings?

[tvnacman]

does your oil light work ? low oil or poor oil circulation could be creating the noise what climate are you in ? I have an 07 GTS and know when my oil is low I can hear it .

lets hear the noise .

John

[cyborg]

Check your cam chain tension also,,, a loose chain can make a very similar noise,,,,

[cyborg]

Stranger things have happened ,, but I doubt highly that the piston is slapping on a Vespa with under 1000 miles,,, did you get it used? Or just a leftover ?,,,, if it's new take it to a different dealer,,,, or contact piaggio directly you'd be surprised at how differently a dealer acts after getting barked at by their boss,,, you may even get a new mill out of the deal

[gord]

Hey, thank you for the input. Totally convinced that I have a "top end" knock cold. Bike sat at dealer 8 months before I purchased with 1 mile on the clock. Hear it all the time, till it reaches op temp, very obvious. Tried contacting Piaggio America's through their email link, get no response. Need to find the number to contact them, it is not readily available on the site. If you know it, please pass it on. Thanks to all for replying, gord

[cyborg]

That is most definitely a warrant issue,,, and a different dealer is in order,, this one is obviously giving you the " cold shoulder " keep pounding away at piaggio they'll cave in

[tvnacman]

have you gone on gtsownersforum or modernvespa , I know some dealers hang around on there . One checked my vin for a fuel pump recall . It might be a good idea to lurk in there a little .

John

[cyborg]

I just scoured the Internet and found no engine problems other than fuel pump issues which was a recall,,,

[cyborg]

Any word on the gts???

[tvnacman]

I started mine yesterday , sounded like marbles in the clutch . after it ran for a short ride it was gone . I will start it later and see .

John

[gord]

Hey, ty! Sounds like mine has a top end rhythmical rattle right at the cylinder idling cold, then stops after about 5 minutes. Wish I could figure out how to isolate it from the variator, but the noise is right at the cyl???

[cyborg]

Check your cam chain,,,

[gord]

Well. the bike only has 700 miles on it, no I started at 100 miles. what is the best way to check timing chain tension? I did the valve adjustment on it and did not see anything out of the ordinary- I see there is a tensioner shoe but it does not seem to be adjustable