Tue Dec 27, 2016 2:54 am

Member
300GTS - 2015
Joined: 26 Apr 2014
Posts: 31
Location: United Kingdom
 
Member
300GTS - 2015
Joined: 26 Apr 2014
Posts: 31
Location: United Kingdom
Tue Dec 27, 2016 2:54 am linkquote
Hi all, I hope you each had a good Xmas. I'm about to resume my investigations on this and I'm desperate to get it sorted out as it's back to work for me tomorrow....hopefully not on the train!

I'd like to check the spark plug - just to rule that out - but the HT cable is secured so tightly and with the limited hand-space to manoeuvre in it's really difficult to get to it.

In order to give you all something more to consider, I've taken a short video of what's happening as I attempt to start the scooter. Right at the beginning you can hear the fuel pump prime. Let me know if this sheds any more light on it.

Thanks!
Tue Dec 27, 2016 3:04 am

Ossessionato
Vespa LX150 GTS250ie GTS300x2 sold 'em
Joined: 11 Dec 2009
Posts: 2297
Location: St. Pete, Fla
 
Ossessionato
Vespa LX150 GTS250ie GTS300x2 sold 'em
Joined: 11 Dec 2009
Posts: 2297
Location: St. Pete, Fla
Tue Dec 27, 2016 3:04 am linkquote
The experts will be here in a little while with a more knowledgeable answer, but I say your problem is with your starter is not engaging. This needs to back to the dealer for this repair if it is still under warranty.
Tue Dec 27, 2016 3:31 am

Enthusiast
Vespa GS 160 mk1 MISA / Vespa GL-B 150 MISA / Vespa GTS300 super / Vespa LX50 4V
Joined: 26 Nov 2016
Posts: 81
Location: The Netherlands
 
Enthusiast
Vespa GS 160 mk1 MISA / Vespa GL-B 150 MISA / Vespa GTS300 super / Vespa LX50 4V
Joined: 26 Nov 2016
Posts: 81
Location: The Netherlands
Tue Dec 27, 2016 3:31 am linkquote
Sounds like the same problem:
Starter is turning and not engaging.
lostboater wrote:
The experts will be here in a little while with a more knowledgeable answer, but I say your problem is with your starter is not engaging. This needs to back to the dealer for this repair if it is still under warranty.
Agree, you still have 5 months of warranty.
Tue Dec 27, 2016 9:10 am

Hooked
Triumph 900 Bonnie
Joined: 11 May 2016
Posts: 320
Location: Sussex coast.
 
Hooked
Triumph 900 Bonnie
Joined: 11 May 2016
Posts: 320
Location: Sussex coast.
Tue Dec 27, 2016 9:10 am linkquote
Ah-ha! At last we have it. Your fault lies in the sprag clutch (a sort of intermediary between the starter motor and the crank shaft). It's not really a DIY job and, as has already been said, it's still under warranty.

Sorry dude, it's the train in the morning. Followed by a call to your dealer. Bummer, but there it is.
Tue Dec 27, 2016 12:51 pm

Enthusiast
Vespa GS 160 mk1 MISA / Vespa GL-B 150 MISA / Vespa GTS300 super / Vespa LX50 4V
Joined: 26 Nov 2016
Posts: 81
Location: The Netherlands
 
Enthusiast
Vespa GS 160 mk1 MISA / Vespa GL-B 150 MISA / Vespa GTS300 super / Vespa LX50 4V
Joined: 26 Nov 2016
Posts: 81
Location: The Netherlands
Tue Dec 27, 2016 12:51 pm linkquote
@simon64ds I'm just curious and for future knowledge, which part is exactly broken?

Do you mean the connection between the starter gear (number 4) and the crankshaft.


Or do you mean the woodruff key (number 10) / freewheel (number 4)
Tue Dec 27, 2016 2:08 pm

Hooked
2010 Vespa super,2016 vespa 3 00 1979 p200 with sidecar 1958 cu shman eagle with sidecar Inder trai ler 1983 bajaj tuk tuk tristar 2018 royal Enfi
Joined: 15 Apr 2012
Posts: 448
Location: Dothan alabama
 
Hooked
2010 Vespa super,2016 vespa 3 00 1979 p200 with sidecar 1958 cu shman eagle with sidecar Inder trai ler 1983 bajaj tuk tuk tristar 2018 royal Enfi
Joined: 15 Apr 2012
Posts: 448
Location: Dothan alabama
Tue Dec 27, 2016 2:08 pm linkquote
Sprag clutch
There is no doubt about it don't try this yourself this is a dealership job with lots of stuff to mess up if you error. Just a poor peice of luck. Capt Gary
Tue Dec 27, 2016 2:11 pm

Hooked
Triumph 900 Bonnie
Joined: 11 May 2016
Posts: 320
Location: Sussex coast.
 
Hooked
Triumph 900 Bonnie
Joined: 11 May 2016
Posts: 320
Location: Sussex coast.
Tue Dec 27, 2016 2:11 pm linkquote
It's item number 4 (freewheel) more commonly known as a sprag clutch. It's designed to apply torque in one direction and slip in the other. When it wears (or, sometimes, gums up) it fails to grip and the starter just spins.

Here's a link to sprags in general..

https://en.m.wikipedia.org/wiki/Sprag_clutch
Tue Dec 27, 2016 2:35 pm

Moderaptor
The Hornet (GT200, aka Love Bug) and 'Dimples' - a GTS 300
Joined: 26 Aug 2007
Posts: 41449
Location: Pleasant Hill, CA
 
Moderaptor
The Hornet (GT200, aka Love Bug) and 'Dimples' - a GTS 300
Joined: 26 Aug 2007
Posts: 41449
Location: Pleasant Hill, CA
Tue Dec 27, 2016 2:35 pm linkquote
As above, that video nails it - the sprag clutch has jammed open. I've not heard of that before, I've only encountered broken sprag clutches - which make a horrible noise.

Getting the water pump/flywheel cover/stator off is OK without special tools (I did one of ours last week) but getting the flywheel off does require pullers etc, preferably the correct Piaggio ones. I've always let a dealer do that!

As it's under warranty, let the dealer fix it. Just tell them the sprag clutch has failed, and hopefully they can collect the scoot and fix it.
Tue Dec 27, 2016 11:40 pm

Enthusiast
Vespa GS 160 mk1 MISA / Vespa GL-B 150 MISA / Vespa GTS300 super / Vespa LX50 4V
Joined: 26 Nov 2016
Posts: 81
Location: The Netherlands
 
Enthusiast
Vespa GS 160 mk1 MISA / Vespa GL-B 150 MISA / Vespa GTS300 super / Vespa LX50 4V
Joined: 26 Nov 2016
Posts: 81
Location: The Netherlands
Tue Dec 27, 2016 11:40 pm linkquote
@simon64ds Thanks for the explanation about the sprag clutch.
Wed Dec 28, 2016 1:54 am

Hooked
Triumph 900 Bonnie
Joined: 11 May 2016
Posts: 320
Location: Sussex coast.
 
Hooked
Triumph 900 Bonnie
Joined: 11 May 2016
Posts: 320
Location: Sussex coast.
Wed Dec 28, 2016 1:54 am linkquote
@Pilaf, you're most welcome Happy New Year!
Wed Dec 28, 2016 5:00 am

Member
300GTS - 2015
Joined: 26 Apr 2014
Posts: 31
Location: United Kingdom
 
Member
300GTS - 2015
Joined: 26 Apr 2014
Posts: 31
Location: United Kingdom
Wed Dec 28, 2016 5:00 am linkquote
Many thanks to all of you - I'll follow up with my dealer as it's still under warranty.

I'll post again in due course regarding the outcome, hopefully all good.

Regards!
Wed Dec 28, 2016 5:50 am

Ossessionato
Vespa LX150 GTS250ie GTS300x2 sold 'em
Joined: 11 Dec 2009
Posts: 2297
Location: St. Pete, Fla
 
Ossessionato
Vespa LX150 GTS250ie GTS300x2 sold 'em
Joined: 11 Dec 2009
Posts: 2297
Location: St. Pete, Fla
Wed Dec 28, 2016 5:50 am linkquote
Re: Sprag clutch
capt. gary wrote:
There is no doubt about it don't try this yourself this is a dealership job with lots of stuff to mess up if you error. Just a poor peice of luck. Capt Gary
Spoken by an expert as his sprag clutch went out on a Oyster Tour last year in FLA and his scooter ended up in Atlanta for the repair. But that is another story.


Contemplating the problem


Off to the repair house

Thu Jan 05, 2017 11:49 pm

Member
300GTS - 2015
Joined: 26 Apr 2014
Posts: 31
Location: United Kingdom
 
Member
300GTS - 2015
Joined: 26 Apr 2014
Posts: 31
Location: United Kingdom
Thu Jan 05, 2017 11:49 pm linkquote
simon64ds wrote:
Ah-ha! At last we have it. Your fault lies in the sprag clutch (a sort of intermediary between the starter motor and the crank shaft). It's not really a DIY job and, as has already been said, it's still under warranty.

Sorry dude, it's the train in the morning. Followed by a call to your dealer. Bummer, but there it is.
**UPDATE**

Returned to dealer this week and they are currently replacing the starter clutch citing the sprag as the problem. Hoping to have it back in the next couple of days.

Hats off to simon64ds and to all of you kind people on the board who provided support and suggestions.
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