OP
@thewacokid avatar
UTC

Enthusiast
2007 Vespa GTV250, 2017 Ural Gear Up Metallic Green, 1978 Honda CB400A
Joined: UTC
Posts: 93
Location: Pittsburgh PA
 
Enthusiast
@thewacokid avatar
2007 Vespa GTV250, 2017 Ural Gear Up Metallic Green, 1978 Honda CB400A
Joined: UTC
Posts: 93
Location: Pittsburgh PA
UTC quote
Hi all. Ok, heres whats going on. I have a rear tire on my GTV that has a hole in it. Ive patched it up (Win!) but it needs to be replaced. I bought a new tire already, and now comes the tough part.

There is now no shop in Pittsburgh that will change a damn Vespa tire. The reason is, in both cases, the exhaust removal. They will mount the tire for me if i can get the wheel off. Awesome :/ My only other option is to ride her up to Cleveland on a patched tire just to get a tire change.

So ive watched a bunch of videos on the rear tire removal. Im reasonably confident that i have the mechanical aptitude to take it off (Go Navy engineering!). My question to the community is this: Where are the land mines? Is there anything i should be looking for that maybe isnt mentioned? any tips from people who have done this before. Im acquiring all the tools now, so i should be set up reasonably soon. Ive read through several of the posts that covered this topic, but wanted to ask the community for advice.

Thanks all
UTC

Addicted
250 Super
Joined: UTC
Posts: 769
Location: 93441
 
Addicted
250 Super
Joined: UTC
Posts: 769
Location: 93441
UTC quote
Probably your biggest decision will be how to handle the exhuast removal. If you go with the silencer only route, you'll need to be careful with the graphite gasket (that's the method I use, and I use one of those expander tools to spread the silencer/gasket slightly to slip back on the header). Removing the entire exhuast has the access to the fasteners at the head and the lamda sensor as considerations. Probably the next biggest challenge could be removing the shock mount plate from the rear axle if it has much corrosion (Scooterwest has a removal tool that helps with that). Use anti-seize for reassembly.
@salima_draghetta avatar
UTC

Molto Verboso
GTS 250
Joined: UTC
Posts: 1518
Location: Utah, USA
 
Molto Verboso
@salima_draghetta avatar
GTS 250
Joined: UTC
Posts: 1518
Location: Utah, USA
UTC quote
I have a GTS, but I believe the rear tire change is the same as yours. Make sure your tire is balanced before you put it in. I had a bit of a hard time with the exhaust flange gasket (I destroyed the first one I tried to put in, ... lesson learned, the second one went in like a charm); also, use a new cotter pin to replace the old one; the exhaust braket nuts need to come off and then on (at reassembling) in a specific order (tighten the wheel nut first, then the two peripheral bolts that fix the braket to the engine), and be careful with the torques. This is how I did it, and the sequencing:

first: tightened bolts on the wheel in a star pattern, 15 - 18 ft/lbs
second: tightened center wheel bolt, approx. 120 Nm
third: tightened the suspension bolt 17 mm 25 ft/lbs
fourth: the two allen 6 mm screws to the right, 15 - 18 ft. lbs.

I converted the ft / lbs measurements into inch pounds, which is what my torque has, multiplying the foot value x 12, and leaving the pounds as is.

Assuming the GTV is like the GTS, I hope this helps.

Salima
@paul_g avatar
UTC

Ossessionato
GTS 250ie
Joined: UTC
Posts: 2047
Location: Rhode Island
 
Ossessionato
@paul_g avatar
GTS 250ie
Joined: UTC
Posts: 2047
Location: Rhode Island
UTC quote
You need to remove the right side swing arm that supports the axle and shock.

It may not want to move. You can rig up a puller of sorts (you're an engineer, after all), or look at this:

https://www.scooterwest.com/items/?_pageCCS=t#page=/item_details/GT-GTS-Swing-Arm-Shock-Mount-Puller/2176

Also, make a note of the position of the spacers and washers -- I string them on a wire in order.

The rest is cake.

P.
@andythebuilder avatar
UTC

Addicted
250 gts, nitroed zip 69cc " the teenager", 200 now 300 lc zip "all grown up"
Joined: UTC
Posts: 721
Location: Cheshire
 
Addicted
@andythebuilder avatar
250 gts, nitroed zip 69cc " the teenager", 200 now 300 lc zip "all grown up"
Joined: UTC
Posts: 721
Location: Cheshire
UTC quote
easy peasy
hi buddy,
it seems to me your over thinking this little job, make sure you have a spare /new graphite gasket, split pin for the castle nut and make a note of the order the wheel spacers and cone are assembled,
get it done
Andy.
@vintage_red_matthew avatar
UTC

MV Santa
GTS250, 1975 VBC, 1980 P200E cutdown
Joined: UTC
Posts: 4777
Location: Sedgwick, Kansas
 
MV Santa
@vintage_red_matthew avatar
GTS250, 1975 VBC, 1980 P200E cutdown
Joined: UTC
Posts: 4777
Location: Sedgwick, Kansas
UTC quote
Good for you. If you think you can do it you probably can. There are two wayas to take the muffler off. With the manifold or leaving the manifold on the bike. I usually leave it on and separate the manifold and muffler. That way you don't have to deal with the oxygen sensor or the manifold studs but there is a greater chance of damaging the graphite exhaust gasket. You should have one on hand which ever way you choose. You should also have anti sieze paste for the bolts when you put them back on. Sometimes the muffle bolts can be very tight. You should break them loose beore you do anyhing else. The swing arm plate can get frozen to the axle at the bearing. There is a puller available. Hopefully you won't need it. Put paste on that too when it goes back on.You should also have a new cotter pin for the castle nut. Changing the rear hub oil is easiest when the rear wheel is off.

Good luck.
@kshansen avatar
UTC

Molto Verboso
GTV300 (wife's)
Joined: UTC
Posts: 1902
Location: Central New York
 
Molto Verboso
@kshansen avatar
GTV300 (wife's)
Joined: UTC
Posts: 1902
Location: Central New York
UTC quote
Like many others have said get a spare graphite gasket. Like many other things the only time there will be a problem is if you don't have a spare!

Changed the rear tire twice on wife's GTV and still has the factory gasket, but there is one sitting on the shelf just in case. I've been very luck both times and the swing arm slid off the bearing nice and easy.

If you haven't seen the videos Robot on ScooterWest has done be sure to watch those. There is one that shows how the puller tool works. If you can get a piece of scrap steel the right size and have ability to drill a few holes it would be easy to make one of your own.

I'm not a Navel engineer but I did spend 28 days on a cruise ship in the Pacific in October and November this year! Laughing emoticon
@judy avatar
UTC

World Traveler
2007 LX150 Daring Plum Leonardo Da Vespa
Joined: UTC
Posts: 29304
 
World Traveler
@judy avatar
2007 LX150 Daring Plum Leonardo Da Vespa
Joined: UTC
Posts: 29304
UTC quote
Did you try moped/scooter shops? I'm sure they would do it. MC shops won't do Vespa's here. Don't know why but any moped shop will. Good kuck
@max6200 avatar
UTC

Banned
2006 GTS 250
Joined: UTC
Posts: 10590
Location: KS USA
 
Banned
@max6200 avatar
2006 GTS 250
Joined: UTC
Posts: 10590
Location: KS USA
UTC quote
Almost nothing to add The experts have spoken. I would remove the pipe at the manifold. There is a clip when you raise the pet carrier on the right side. Unclip the oxygen sensor wiring and that should give you enough wigglle room. Lay the pipe on a folded up old blanket or pillow to the side. Don't attempt to remove the O2 sensor. Be gentle with it. Very gentle.
@max6200 avatar
UTC

Banned
2006 GTS 250
Joined: UTC
Posts: 10590
Location: KS USA
 
Banned
@max6200 avatar
2006 GTS 250
Joined: UTC
Posts: 10590
Location: KS USA
UTC quote
As a last thought. Replace this brass gasket while at it.
Forum member supplied image with no explanatory text
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