Tue Nov 22, 2022 11:11 am

Molto Verboso
1958 Allstate 177VMC, 2005 70cc Yamaha Vino
Joined: 23 Aug 2020
Posts: 1214
Location: Philadelphia
 
Molto Verboso
1958 Allstate 177VMC, 2005 70cc Yamaha Vino
Joined: 23 Aug 2020
Posts: 1214
Location: Philadelphia
Tue Nov 22, 2022 11:11 am linkquote
Because why not right? So I have a set of mismatched cases, it's my first build so if I mess them up it's not the total end of the world. I've read the pros and cons of using them as a set and am going to give it a go and see if they mate up and seal and run. Why not?

First order of business, the clutch side case is 2 port and the flywheel side is 3 port. So I gotta make a decision. Fill the 1/2 port opening or cut the clutch side case to match the 3rd port. There's not much surface on the clutch side so I'd have to have some welding done to go 3 port. I'd also have way more options in the cylinder department. Not sure which way to go. A 177 2 port motor isn't a bad option. Neither is a 3 port though.

To close the 3rd port do I need to actually fill it with weld or jbweld (ugh) or can I just put the gasket over it and it'll be kosher?
Also a smallish piece of the case broke off during shipping. The flywheel covers where the piece broke off though so jbweld for that and it'll be fine I think.
Here's some pictures.













Tue Nov 22, 2022 1:20 pm

Hooked
1960 Allstate VNA, 1962 VNB
Joined: 19 May 2014
Posts: 227
Location: Cambria, CA
 
Hooked
1960 Allstate VNA, 1962 VNB
Joined: 19 May 2014
Posts: 227
Location: Cambria, CA
Tue Nov 22, 2022 1:20 pm linkquote
This will be interesting.
Tue Nov 22, 2022 1:32 pm

Ossessionato
1979 P150X, 1983 P200E, 1988 T5, 1995 PX200E, 2011 Yamaha Fazer 600 S2
Joined: 02 Aug 2015
Posts: 3336
Location: Veria, Greece
 
Ossessionato
1979 P150X, 1983 P200E, 1988 T5, 1995 PX200E, 2011 Yamaha Fazer 600 S2
Joined: 02 Aug 2015
Posts: 3336
Location: Veria, Greece
Tue Nov 22, 2022 1:32 pm linkquote
Done it before with P/PX cases. As long as surfaces match and are flat you usually don't encounter any problems. I'd 3 port the 2 port half...
Tue Nov 22, 2022 1:46 pm

Molto Verboso
Joined: 03 Nov 2011
Posts: 1596
Location: Racing Capital of the World
 
Molto Verboso
Joined: 03 Nov 2011
Posts: 1596
Location: Racing Capital of the World
Tue Nov 22, 2022 1:46 pm linkquote
have the clutch side TIG welded. Mill the cylinder gasket area of both sides. enjoy your 3 port cases done right, plenty of cylinder options at this point.
Tue Nov 22, 2022 8:14 pm

Style Maven
'74 50s x3 '78 P200 E '84 Cosa '91 PK50XL2 '58 AllState '68 Sprint '80 50special and a '66(?) Super125
Joined: 22 Nov 2010
Posts: 8837
Location: seattle/athens
 
Style Maven
'74 50s x3 '78 P200 E '84 Cosa '91 PK50XL2 '58 AllState '68 Sprint '80 50special and a '66(?) Super125
Joined: 22 Nov 2010
Posts: 8837
Location: seattle/athens
Tue Nov 22, 2022 8:14 pm linkquote
SaFiS wrote:
Done it before with P/PX cases. As long as surfaces match and are flat you usually don't encounter any problems. I'd 3 port the 2 port half...
ditto, but two different motors. The nonmatching P200 cases still work just fine, and the originally 2 port motor in the AllState that I cut a 3rd port in, using just JBWeld to fill the voids and pad the cylinder mating surface around the 3rd port. It's been beat hard and still runs strong, but you should get it welded if you can.

Go yeah, three port, in for a dime, etc... And anyway I like that you are daring to rescue these otherwise useless but sweet looking old orphan halves! Lemme know if you need any odd bits.
Tue Nov 22, 2022 11:25 pm

Jet Eye Master
PX221 MHR, O tuned PX200, PX181 Quattrini and some motorbikes
Joined: 14 Jun 2017
Posts: 3528
Location: London UK
 
Jet Eye Master
PX221 MHR, O tuned PX200, PX181 Quattrini and some motorbikes
Joined: 14 Jun 2017
Posts: 3528
Location: London UK
Tue Nov 22, 2022 11:25 pm linkquote
Three port for sure. And reed. This cylinder is the direct route from no power to full power.
https://www.sip-scootershop.com/en/product/racing-cylinder-quattrini-m1xl-11-172-cc_15046100
If using a 60mm crank it wouldn't even need the cases cut.
Thu Nov 24, 2022 2:32 am

Ossessionato
1979 P150X, 1983 P200E, 1988 T5, 1995 PX200E, 2011 Yamaha Fazer 600 S2
Joined: 02 Aug 2015
Posts: 3336
Location: Veria, Greece
 
Ossessionato
1979 P150X, 1983 P200E, 1988 T5, 1995 PX200E, 2011 Yamaha Fazer 600 S2
Joined: 02 Aug 2015
Posts: 3336
Location: Veria, Greece
Thu Nov 24, 2022 2:32 am linkquote
Jack's once again suggesting highly addictive parts to people. BAN HIM!!!
Thu Nov 24, 2022 7:31 am

Molto Verboso
Joined: 03 Nov 2011
Posts: 1596
Location: Racing Capital of the World
 
Molto Verboso
Joined: 03 Nov 2011
Posts: 1596
Location: Racing Capital of the World
Thu Nov 24, 2022 7:31 am linkquote
Jack221 wrote:
Three port for sure. And reed. This cylinder is the direct route from no power to full power.
https://www.sip-scootershop.com/en/product/racing-cylinder-quattrini-m1xl-11-172-cc_15046100
If using a 60mm crank it wouldn't even need the cases cut.
i've always thought that cylinder would work on a VNA case with a 57mm crankshaft. i don't know of anyone that has done it, but i think it would work okay.
Thu Nov 24, 2022 8:42 am

Jet Eye Master
PX221 MHR, O tuned PX200, PX181 Quattrini and some motorbikes
Joined: 14 Jun 2017
Posts: 3528
Location: London UK
 
Jet Eye Master
PX221 MHR, O tuned PX200, PX181 Quattrini and some motorbikes
Joined: 14 Jun 2017
Posts: 3528
Location: London UK
Thu Nov 24, 2022 8:42 am linkquote
Not tried but I'm also sure it would fit any 3 port small block case. I ran mine on a 57mm stock crank to run it in but the seals started to fail after 500 miles. Even just bolted on (with 30mm & bullet177), it was good for over 70mph every time.

Rebuilt mine and converted it to a 181cc using a 110 rod 60mm crank. It really goes now. Shocked me how well. Is why I keep going on about it. I took pictures but yet to update the thread. PX125 catalysed to Quattrini sleeper (Page 2)

Putting one of these in anything on 8s would be mental. Enough reason for some maniac to do it.
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