OP
@jsunstar avatar
UTC

Addicted
07 GT200, Flip flops
Joined: UTC
Posts: 534
Location: Cayo Hueso: an Island at the end of the road
 
Addicted
@jsunstar avatar
07 GT200, Flip flops
Joined: UTC
Posts: 534
Location: Cayo Hueso: an Island at the end of the road
UTC quote
bottom of engine. flywheel side.
should be easy weld right?
Forum member supplied image with no explanatory text
Forum member supplied image with no explanatory text
@sfvsr avatar
UTC

Ossessionato
a lambretta or two
Joined: UTC
Posts: 3724
Location: San Francisco
 
Ossessionato
@sfvsr avatar
a lambretta or two
Joined: UTC
Posts: 3724
Location: San Francisco
UTC quote
Should be straightforward repair.

Hey, what's with all the gouge marks? Are you using screw drivers to pry open your cases?
@shipscat avatar
UTC

Hooked
vespa 125 vnb1t
Joined: UTC
Posts: 391
Location: antibes , france
 
Hooked
@shipscat avatar
vespa 125 vnb1t
Joined: UTC
Posts: 391
Location: antibes , france
UTC quote
has any one tried using this hts2000 as an alternative to tig welding aluminium engine cases
not sure i'd use it on a cylinder or head
search you tube for hts 2000 aluminium brazing
interesting all the same i think
@sara_alexandra avatar
UTC

Hooked
PX232 Lambretta li s3, Vespa cross, Vespa cross prototype, Honda NS400r....
Joined: UTC
Posts: 282
Location: Belgium
 
Hooked
@sara_alexandra avatar
PX232 Lambretta li s3, Vespa cross, Vespa cross prototype, Honda NS400r....
Joined: UTC
Posts: 282
Location: Belgium
UTC quote
i made a fuel tank with Easyweld (aluminium brazing) so repairing this crack should be no problem. Brush with an stainless steel brush, and start brazing. You need a big flame to heat up the case. I use a propane burner to heat up the part and then with a smaller flame do the brazing.

Sara
OP
@jsunstar avatar
UTC

Addicted
07 GT200, Flip flops
Joined: UTC
Posts: 534
Location: Cayo Hueso: an Island at the end of the road
 
Addicted
@jsunstar avatar
07 GT200, Flip flops
Joined: UTC
Posts: 534
Location: Cayo Hueso: an Island at the end of the road
UTC quote
no, i haven't been screwdriver-ing the cases but apparently someone has.
this poor motor has been rode hard, opened with a hammer and fuggled-up pretty badly.
im gonna use a little emory to clean up the gasket surfaces.
i just noticed the crack after cleaning the cases in the parts washer and scraping the old gaskets.

im almost at a point where im ready to cut my losses and find a new engine, i haven't had much luck with it...

its been a sad saga...
the saga of my smallframe engine rebuild

sara, ill look into that aluminum repair, its a small crack. do you have to get the case up to a certain temperature? would a hand held propane torch do it?
@sara_alexandra avatar
UTC

Hooked
PX232 Lambretta li s3, Vespa cross, Vespa cross prototype, Honda NS400r....
Joined: UTC
Posts: 282
Location: Belgium
 
Hooked
@sara_alexandra avatar
PX232 Lambretta li s3, Vespa cross, Vespa cross prototype, Honda NS400r....
Joined: UTC
Posts: 282
Location: Belgium
UTC quote
handheld will do. Just watch the temperature, aluminium melts without much warning!
I use also a sharpend stainless spoke, to scratch in the melting bath.

Good luck

Sara
@trumpyscooter avatar
UTC

Molto Verboso
Black 2007 PX200, Dark green 1986 PX225 Pinasco, "1972"(yeah rite) Tangerine px200, several TRIUMPH TIGRESS SCOOTERS
Joined: UTC
Posts: 1082
Location: New Zealand
 
Molto Verboso
@trumpyscooter avatar
Black 2007 PX200, Dark green 1986 PX225 Pinasco, "1972"(yeah rite) Tangerine px200, several TRIUMPH TIGRESS SCOOTERS
Joined: UTC
Posts: 1082
Location: New Zealand
UTC quote
Cheap, easy job for an experienced welder, aluminium melts at 600 degrees, an alloy may melt at a lesser temp. It wouldnt be something i would attempt for a first job. Upto you.

*edit* you could on the other hand, cross file and lap the repaired case surface flat and smooth it yourself, as that would take the most time and of the repair be the most important part. The use of bearing blue or a vivid marker to show high spots would be useful.

cheers
OP
@jsunstar avatar
UTC

Addicted
07 GT200, Flip flops
Joined: UTC
Posts: 534
Location: Cayo Hueso: an Island at the end of the road
 
Addicted
@jsunstar avatar
07 GT200, Flip flops
Joined: UTC
Posts: 534
Location: Cayo Hueso: an Island at the end of the road
UTC quote
thanks guys (n dolls)
im gonna send it out to get welded and have the cylinder matched to the cases while its out...
UTC

Addicted
SS208, SX250 , RD's and a K1300s and an RZ350 and TZR250
Joined: UTC
Posts: 567
 
Addicted
SS208, SX250 , RD's and a K1300s and an RZ350 and TZR250
Joined: UTC
Posts: 567
UTC quote
good! It is an easy weld, but since it involves the gasket face, it will need to be surfaced correctly or it will leak oil and be an ever present reminder of all of the issues with the rebuild instead of letting you enjoy riding it!
@greasy125 avatar
UTC

Sergeant at Arms
Weird 80's Vespas & Cool Vintage Lambrettas
Joined: UTC
Posts: 14966
Location: The state of insanity, SoCal
 
Sergeant at Arms
@greasy125 avatar
Weird 80's Vespas & Cool Vintage Lambrettas
Joined: UTC
Posts: 14966
Location: The state of insanity, SoCal
UTC quote
meh on the welding. this looks like a job for JB weld.

seriously. clean it up really good with brake clean, take a little file and gouge a little v up in there, clean it all really good again with alcohol and lay some JB on there, use a razor blade to clear the excess off the gasket face and call it done.

best,
-greasy
@v_oodoo avatar
UTC

Style Maven
'74 50s x3 '87 PK125XL '92 PK50XLS Plurimatic - & - '58 AllState '68 Sprint '66(?) Super125 and '72 DanMotor Super150
Joined: UTC
Posts: 9625
Location: seattle/athens
 
Style Maven
@v_oodoo avatar
'74 50s x3 '87 PK125XL '92 PK50XLS Plurimatic - & - '58 AllState '68 Sprint '66(?) Super125 and '72 DanMotor Super150
Joined: UTC
Posts: 9625
Location: seattle/athens
UTC quote
I agree JB Weld should work, but first drill a small hole thru at the end of the crack so it doesn't migrate.

External inline image provided by member with no explanatory text

External inline image provided by member with no explanatory text
UTC

Banned
62vnb , 71 sprint ,1974 vespa90
Joined: UTC
Posts: 648
Location: Idaho falls
 
Banned
62vnb , 71 sprint ,1974 vespa90
Joined: UTC
Posts: 648
Location: Idaho falls
UTC quote
+1 on what voodoo said . J B works a lot better than you may think , I had a broken clutch adjustment bracket for the screw that was broken off the case . I used a screw and some J B thinking it would last maybe until I find another case rode the scoot for about another year .
UTC

Addicted
SS208, SX250 , RD's and a K1300s and an RZ350 and TZR250
Joined: UTC
Posts: 567
 
Addicted
SS208, SX250 , RD's and a K1300s and an RZ350 and TZR250
Joined: UTC
Posts: 567
UTC quote
JB weld is a good idea. Maybe not a completely permanent fix but should last a long time. I have seen crazy porting jobs patched with JB hold up for years, amazing given they have way less support than what you have here and the transfer area sees pressure changes and gasoline, etc.

Get super small syringes and inject the mixed epoxy into the crack after prepping it like greasy said!
UTC

Addicted
1961 vbb and 1981 p125x
Joined: UTC
Posts: 579
Location: iowa
 
Addicted
1961 vbb and 1981 p125x
Joined: UTC
Posts: 579
Location: iowa
UTC quote
My guess is the case was cracked while trying to pry the thing open. Chances are even with the crack its not leaking. If you weld it the chances of warping the case is there. Brazing is a better option. Less heat. If it were me. I'd v it out with a dremel tool then use some duramix on it. Duramix is a 3m brand of epoxy kinda like jbweld.
@rowdyc avatar
UTC

Molto Verboso
GL, PK, PE200 with hack, Sears Rust Badge
Joined: UTC
Posts: 1346
Location: Deep in the heart of Texas
 
Molto Verboso
@rowdyc avatar
GL, PK, PE200 with hack, Sears Rust Badge
Joined: UTC
Posts: 1346
Location: Deep in the heart of Texas
UTC quote
I didn't see a need to start a new tread since this one is very close to my problem.

I'm working on a Sprint Veloce engine. It seems the PO tried to crack open the engine and knocked a chip out of the case. In the picture below, you can see the "U" shape chip on the top of the case.

External inline image provided by member with no explanatory text

Can this case be used or should I purchase a entire new case? Fixable?????
@joshzingzing avatar
UTC

Veni, Vidi, Posti
px200 cutdown,px180,px150. Puch SR. Puch scooterette
Joined: UTC
Posts: 5109
Location: west aus
 
Veni, Vidi, Posti
@joshzingzing avatar
px200 cutdown,px180,px150. Puch SR. Puch scooterette
Joined: UTC
Posts: 5109
Location: west aus
UTC quote
thats just the leaf blower part
@ginch avatar
UTC

Veni, Vidi, Posti
74 Super, 75 Super, PX project, LML off-roader and '66 Blue Badge Smallframe
Joined: UTC
Posts: 8695
Location: Victoria, Australia
 
Veni, Vidi, Posti
@ginch avatar
74 Super, 75 Super, PX project, LML off-roader and '66 Blue Badge Smallframe
Joined: UTC
Posts: 8695
Location: Victoria, Australia
UTC quote
Just leave it, it'll be fine. Worst comes to worst maybe you could glue a bit of similar plastic to the cylinder cowl.
@sfvsr avatar
UTC

Ossessionato
a lambretta or two
Joined: UTC
Posts: 3724
Location: San Francisco
 
Ossessionato
@sfvsr avatar
a lambretta or two
Joined: UTC
Posts: 3724
Location: San Francisco
UTC quote
Of course, this doesn't mean the previous owner is off the hook for a smack in the mouth.
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: 0.0110s ][ Queries: 5 (0.0024s) ][ live ][ 313 ][ ThingOne ]