@greasy125 avatar
UTC

Sergeant at Arms
Weird 80's Vespas & Cool Vintage Lambrettas
Joined: UTC
Posts: 14988
Location: The state of insanity, SoCal
 
Sergeant at Arms
@greasy125 avatar
Weird 80's Vespas & Cool Vintage Lambrettas
Joined: UTC
Posts: 14988
Location: The state of insanity, SoCal
UTC quote
steelbytes wrote:
which is exactly why I've never understood why all the after market exahusts don't use a bushing or similar.

I have been following Robots guide for installing an Akra on a 2020. ie use antiseeze, loosen all when lining up and the torques that he says. One day i hope i'll have all the torques on my bike memorised
pro tip: never memorize torque values, that way you can't get them wrong because you have to go and look them up.

if you're following that then you're good to go. that's the way it's supposed to be done, even with a stock pipe.
UTC

Addicted
2020 piaggio liberty 150
Joined: UTC
Posts: 970
Location: Reno Nevada
 
Addicted
2020 piaggio liberty 150
Joined: UTC
Posts: 970
Location: Reno Nevada
UTC quote
greasy125 wrote:
pro tip: never memorize torque values, that way you can't get them wrong because you have to go and look them up.

if you're following that then you're good to go. that's the way it's supposed to be done, even with a stock pipe.
That is exactly what they tell you as an American Welding Society Certified Welding Inspector (CWI) do not memorize the code, go look it up!

I will usually print out copies of the pages of the code that correspond to the questions I'm likely to be asked for my own reference and to be able to hand them out to the welders that want them for reference.

Also when speaking about torque values for any nut and bolt fastener it is important to remember that torque values correspond to tension.

What this means is that you want a specific tension on the stud or bolt and that is arrived at by a certain torque amount. The cleanliness and condition of the threads of both the nut and the bolt or stud can greatly affect (change) the tension you get for a given torque.

You should gently clean ( you don't want to use the power wire wheel and disturb the threads, by hand and careful with the elbow grease) and lubricate each time to get as accurate a tension as you can for the given torque. The correct tension is more important but the torque is the common way to measure that in automotive (scooter) applications!

This is especially important when using the same nut and bolt or stud and nut over and over again. It is a spring tension fastener.
⚠️ Last edited by skids on UTC; edited 1 time
@motovista avatar
UTC

Veni, Vidi, Posti
GT 200
Joined: UTC
Posts: 9105
Location: Main Street, Watts
 
Veni, Vidi, Posti
@motovista avatar
GT 200
Joined: UTC
Posts: 9105
Location: Main Street, Watts
UTC quote
steelbytes wrote:
Arrow manifolds? Didn't know Arrow made manifolds, or did you mean for some other bike other than a Vespa. (or did you mean what I call the midpipe)

And what problems?
Arrow is one of two exhaust manufacturers of any size left in Italy, and they make exhausts for a lot of different companies. I've had the same issues with the exhaust manifold as you are having, where they crack near the Lambda sensor opening.
@adri avatar
UTC

Atypical Canadian
2009 Vespa S50(LX150 motor swap), 2006 Vespa GTS250ie
Joined: UTC
Posts: 2319
Location: Toronto, Canada
 
Atypical Canadian
@adri avatar
2009 Vespa S50(LX150 motor swap), 2006 Vespa GTS250ie
Joined: UTC
Posts: 2319
Location: Toronto, Canada
UTC quote
Dooglas wrote:
You know, this is getting tiresome. Why don't you just give it a rest.
*Holds up mirror*
UTC
adri has been ejected from this topic
@motovista avatar
UTC

Veni, Vidi, Posti
GT 200
Joined: UTC
Posts: 9105
Location: Main Street, Watts
 
Veni, Vidi, Posti
@motovista avatar
GT 200
Joined: UTC
Posts: 9105
Location: Main Street, Watts
UTC quote
az_slynch wrote:
The extra bonus is that the odd say the socket will fail if you try over-torquing the nuts.
On just about everything else. Exhaust studs are designed to fail pretty quickly if you overtighten them. The bolts Yamaha used in the two stroke Zuma were designed to snap just below the head, so you could grab what's sticking out and get it out of the cylinder fairly easily (all things considered).
@cheshire avatar
UTC

Molto Verboso
GTS (sold)
Joined: UTC
Posts: 1148
Location: US overlander, NC-plated
 
Molto Verboso
@cheshire avatar
GTS (sold)
Joined: UTC
Posts: 1148
Location: US overlander, NC-plated
UTC quote
Motovista wrote:
On just about everything else. Exhaust studs are designed to fail pretty quickly if you overtighten them. The bolts Yamaha used in the two stroke Zuma were designed to snap just below the head, so you could grab what's sticking out and get it out of the cylinder fairly easily (all things considered).
That's...kinda cool and good to know. Better to build in a workable failure point than leave it to random chance, yes?
DoubleGood Design banner

Modern Vespa is the premier site for modern Vespa and Piaggio scooters. Vespa GTS300, GTS250, GTV, GT200, LX150, LXS, ET4, ET2, MP3, Fuoco, Elettrica and more.

Buy Me A Coffee
 

Shop on Amazon with Modern Vespa

Modern Vespa is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.com


All Content Copyright 2005-2024 by Modern Vespa.
All Rights Reserved.


[ Time: 0.0111s ][ Queries: 3 (0.0020s) ][ live ][ 313 ][ ThingOne ]