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@christopher_55934 avatar
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2007 Stella 225
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Hooked
Vespa Primavera 1974
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UTC quote
Cute how they say "plug and play" but you actually have to open it up and put a new crank in.
@chandlerman avatar
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Lucky
76 Sprint V, 63 GL, 62 VBB, 05 Stella, 66 Smallstate
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UTC quote
spacecat wrote:
Cute how they say "plug and play" but you actually have to open it up and put a new crank in.
Not to mention cut the skirt off the 200 cylinder, port the cases, and potentially deal with the ports being in the wrong locations since, for example, the Malossi 210 ports are differently located than the stock P200.

You'd have to be either really hard up to find some P200 cases or somehow legally limited to go this route, IMO
@charlieman22 avatar
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Nedminder
62 VBB1T Round Tail W/ leaner sidecar
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Nedminder
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UTC quote
I kinda like it.
If you're rebuilding a 150 it does expand choices to get into larger cc cylinders.

Might be a little tight under smaller cowled models?

Suspect you would be able to do some port matching to at least smooth some transitions.
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chandlerman wrote:
You'd have to be either really hard up to find some P200 cases or somehow legally limited to go this route, IMO
Here, here!

While it's great to see this type of work, I think it is something that should have come out say 15 years ago. . . Just based on all the great SB cylinders out now.
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Lucky
76 Sprint V, 63 GL, 62 VBB, 05 Stella, 66 Smallstate
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Lucky
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UTC quote
Also, it's not like you can't just buy repop cases now, either. They're not even that expensive, really, and frequently have solved past design flaws and manufacturing limitations, so they're actually better than OG.
@charlieman22 avatar
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Nedminder
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UTC quote
The after market cases are impressive and real upgrades from a performance standpoint in some ways.

Cases aren't the only thing now readily available that's been improved.
The long stroke crank options are also available.

So… if I had say, a malossi 210 on the shelf and a set of 150 cases, as the OP may, I wouldn't hesitate to assemble with this! It won't be a shinny - but it might be a great economical solution
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VBA1T/Px200 iris
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UTC quote
Should work as it is, but wayyyy more efficient port matching the case and the plate.
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To be honest, after riding with the Malossi 210 for 6 odd years, the conversion feels like a step backwards…

Unless, like the guys say, you have both parts on the shelf. It could be a great solution.

177 kits are definitely more sexy than the big kits.

They say: There no replacement for displacement?? I'm not sure about that in this case…
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It's a neat idea, but seems to limit selection of cranks and top ends. I think you would get more bang for your buck building a tuned 187.
⬆️    About 6 months elapsed    ⬇️
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nsu
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Lucky
76 Sprint V, 63 GL, 62 VBB, 05 Stella, 66 Smallstate
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UTC quote
Based on SC's own statements, you're better off with a good BGM or VMC build than that adapter. They're talking 14-16 HP, but you can get 17 on small block cases, or MUCH more if you don't mind getting a bit exotic with your build.
⬆️    About 3 months elapsed    ⬇️
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PX 150
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UTC quote
They got this completely wrong.
Should be the other way around.
Converting large block cases to take small block 150/177 cylinders.
Large block kits are sloooooow!!
@108 avatar
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PX 200
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UTC quote
Yeah, I feel like they have it backwards.
A px200 would want to be a 150.

It's the cylinder kits are only reason why I'd want 150 crankcases.
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UTC quote
108 wrote:
To be honest, after riding with the Malossi 210 for 6 odd years, the conversion feels like a step backwards…

Unless, like the guys say, you have both parts on the shelf. It could be a great solution.

177 kits are definitely more sexy than the big kits.

They say: There no replacement for displacement?? I'm not sure about that in this case…
177 = revs = fun
210 = torque = I really should lose some weight or leave the pillion at home
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Jet Eye Master
PX221 MHR, O tuned PX200, PX181 Quattrini and some motorbikes
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Jet Eye Master
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UTC quote
jimscoot wrote:
They got this completely wrong.
Should be the other way around.
Converting large block cases to take small block 150/177 cylinders.
Large block kits are sloooooow!!
Nice try I have a tuned version of each block. The small block is definitely zippier and quick in it's own right but the big block is still quicker.

It is a fair point, as non tuned bolt ons, the big block kits are all lower tune.

The fastest of 2 stroke kits are direct reed induction, as all the highest power small frame kits are. I would like to see more of these direct reed kits for large frames. At the moment, as far as I know, there's only the quattrini M1XL (that I have) or the pinasco 960 (cheese piston version).
If quattrini ever did a direct induction version of the M244, I expect this would be the the winner.
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UTC quote
Fastest 2/-... Honda CR500!
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UTC quote
I always wondered why the large and small block engines have such different personalities when they often end up very close in displacement. Maybe because smallblocks typically have shorter gearing, longer stroke crank to increase displacement (often) and kits with more advanced design (not sure).

Going from a 187 to a mostly stock 200 was a huge change, though hard to compare because the 187 is mildly tuned. Biggest difference seemed to be the gearing. Both are distinctly fun rides. I now understand why it's impossible to just have one scooter. Now I can better explain it to the missus. Can't wait to try a tuned small block on 8's.
@ginch avatar
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Veni, Vidi, Posti
74 Super, 75 Super, PX project, LML off-roader and '66 Blue Badge Smallframe
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@ginch avatar
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UTC quote
Jack221 wrote:
The fastest of 2 stroke kits are direct reed induction, as all the highest power small frame kits are. I would like to see more of these direct reed kits for large frames.

If quattrini ever did a direct induction version of the M244, I expect this would be the the winner.
They already do! Kind of. It's the hidden easter egg....

https://www.facebook.com/groups/VintageScooterBuildersShowcase/permalink/1746613352030145/

External inline image provided by member with no explanatory text

External inline image provided by member with no explanatory text

External inline image provided by member with no explanatory text

External inline image provided by member with no explanatory text

Jack why do you think the direct intake is more powerful? The setup is less 'direct' than (a good) case induction as the gas has further to travel. Be interested to hear your thoughts on this.
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Jet Eye Master
PX221 MHR, O tuned PX200, PX181 Quattrini and some motorbikes
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Jet Eye Master
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UTC quote
You got to wonder if quattrini ever tried it themselves. They put it in the casting for a reason. Any info on how that homemade one worked?
When I saw that picture, I knew I'd seen it before, just forgot.
Problem with that homemade one is the reed manifold is from the M1XL. Which is using a Honda CR85 reed block. Big for the Honda but small for a 172. And tiny for a 244.
Done properly, with decent port timing (much more than original) and a wide reed format (like a jet ski) it would be quicker than the fastest lammy kits. Would even worry an Egig BFA in a race.

The two main advantages of direct. Intake goes into an empty space, right where it's needed and stays there. The boost ports/secondaries have direct access to the carb, so the exhaust pipe can suck on them during the downstroke.
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PX 150
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UTC quote
I regular run with a group of quattrini 232 riders, reed valved big carbed quattrini big bangers. Lovely powerful motors with bags of torque. No holes barred these motors are smooth powerful and fast.

I still blow them away on the little 187 lawnmower.

They do run box pipes so maybe if they were tuned to run expansions, could be a different story.

Disclaimer..
No quattrinis were harmed in this experiment and they excepted their defeat gracefully!
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