Tue Jun 08, 2021 9:03 am

Enthusiast
Joined: 22 May 2017
Posts: 60
Location: Vero Beach FL
 
Enthusiast
Joined: 22 May 2017
Posts: 60
Location: Vero Beach FL
Tue Jun 08, 2021 9:03 am linkquote
Purchased this 150lx over 4 years ago. At that time it had under 7K miles. It currently has just under 14K miles. I have done all the maintenance and it has always run great. A week ago I noticed a knocking noise on my ride home from work. The engine had normal power and no oil pressure light. With my helmet on I thought it might be the rollers or slides wearing out because the current ones have 7k miles on them. I just changed the oil and there was no metal at all in the screen or the oil. I changed the rollers, slides, belt. All the old looked pretty good. I adjusted the valves (they were both tight). Noise began prior to all this work I just did but it still sounds the same after all the work. What do you think this noise is?

Tue Jun 08, 2021 9:46 am

Petty Tyrant
GTS250 GTS300 MP3 500
Joined: 11 Oct 2005
Posts: 31026
Location: Bay Area, California
 
Petty Tyrant
GTS250 GTS300 MP3 500
Joined: 11 Oct 2005
Posts: 31026
Location: Bay Area, California
Tue Jun 08, 2021 9:46 am linkquote
Exhaust leak?
Tue Jun 08, 2021 9:57 am

Enthusiast
Joined: 22 May 2017
Posts: 60
Location: Vero Beach FL
 
Enthusiast
Joined: 22 May 2017
Posts: 60
Location: Vero Beach FL
Tue Jun 08, 2021 9:57 am linkquote
jess wrote:
Exhaust leak?
That would be awesome if that is all it is. I will check that. I have had the exhaust off several times and I haven't checked the gasket or tightness of the nuts recently. Thanks Jess!
Tue Jun 08, 2021 5:25 pm

Sergeant at Arms
Weird 80's Vespas & Cool Vintage Lambrettas
Joined: 21 Oct 2005
Posts: 8925
Location: The state of insanity, SoCal
 
Sergeant at Arms
Weird 80's Vespas & Cool Vintage Lambrettas
Joined: 21 Oct 2005
Posts: 8925
Location: The state of insanity, SoCal
Tue Jun 08, 2021 5:25 pm linkquote
jess wrote:
Exhaust leak?
seconded

check and refit the exhaust then assess from there.

good luck!
Tue Jun 08, 2021 5:53 pm

Addicted
2018 GTS 300 Touring Rosso Vignola, 2020 BV 350 Matte Green, 1956 VL3
Joined: 02 Aug 2012
Posts: 937
Location: Herriman, Utah
 
Addicted
2018 GTS 300 Touring Rosso Vignola, 2020 BV 350 Matte Green, 1956 VL3
Joined: 02 Aug 2012
Posts: 937
Location: Herriman, Utah
Tue Jun 08, 2021 5:53 pm linkquote
Thirded.
Not a difficult issue to fix.
Wed Jun 09, 2021 8:24 am

Enthusiast
Joined: 22 May 2017
Posts: 60
Location: Vero Beach FL
 
Enthusiast
Joined: 22 May 2017
Posts: 60
Location: Vero Beach FL
Wed Jun 09, 2021 8:24 am linkquote
Hey guys,
Thank you for chiming in. I will remove the exhaust and refit with a new exhaust gasket to see if that solves it. I shot another video last night and it sure sounds like it is coming from under the valve cover. The Vespa is my daily driver so it has been a pain not being able to use it. Hoping it is just the exhaust!


Derek
Wed Jun 09, 2021 10:13 am

Veni, Vidi, Posti
Neutrino MP3 492.7 AK, 2013 Moto Guzzi Norge
Joined: 29 Mar 2008
Posts: 21857
Location: Harriman, Tennessee, Tn
 
Veni, Vidi, Posti
Neutrino MP3 492.7 AK, 2013 Moto Guzzi Norge
Joined: 29 Mar 2008
Posts: 21857
Location: Harriman, Tennessee, Tn
Wed Jun 09, 2021 10:13 am linkquote
yup change both the head manifold copper gasket and the graphite bushing from the header to the exhaust . when tightening down either don't crank them down thinking tighter is better, you can break exhaust studs and couch the graphite bushing tooooooo much . highly recommend new exhaust studs with new copper nuts as well.
Wed Jun 09, 2021 11:31 am

Enthusiast
Joined: 22 May 2017
Posts: 60
Location: Vero Beach FL
 
Enthusiast
Joined: 22 May 2017
Posts: 60
Location: Vero Beach FL
Wed Jun 09, 2021 11:31 am linkquote
old as dirt wrote:
yup change both the head manifold copper gasket and the graphite bushing from the header to the exhaust . when tightening down either don't crank them down thinking tighter is better, you can break exhaust studs and couch the graphite bushing tooooooo much . highly recommend new exhaust studs with new copper nuts as well.
Thanks old as dirt,

Does the 150 have the graphite bushing? I didn't think it did but I have one on hand. I am ordering the rest now.

Derek
Thu Jun 10, 2021 7:58 am

Veni, Vidi, Posti
Neutrino MP3 492.7 AK, 2013 Moto Guzzi Norge
Joined: 29 Mar 2008
Posts: 21857
Location: Harriman, Tennessee, Tn
 
Veni, Vidi, Posti
Neutrino MP3 492.7 AK, 2013 Moto Guzzi Norge
Joined: 29 Mar 2008
Posts: 21857
Location: Harriman, Tennessee, Tn
Thu Jun 10, 2021 7:58 am linkquote
Shrimp wrote:
Thanks old as dirt,

Does the 150 have the graphite bushing? I didn't think it did but I have one on hand. I am ordering the rest now.

Derek
yup your correct according to the parts diagram from AF1. having a 250 and 500 I just assumed all piaggio's had a graphite bushing. my bad sorry.
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