Modern Vespa

hi,

I need to change the cylinder and exhaust of my motovespa 200 ds.

After performing compression test the result is around 110 psi. I think the result is a bit low.

The compression ratio in the vehicle manual is 10.5:1

I have doubts between 2 thermal kits:

1) Bgm 200 original 200 CC 12 CV

https://www.bgm-tuning.com/es/product/9020017-zylinder-bgm-original-200-ccm-12ps-vespa-px200-rally200-ccm/

2) cylinder serie pro 200

https://www.sip-scootershop.com/es/product/cilindro-serie-pro-200-cc_41470700

Which of the 2 thermal kits works best?

Which one would give me better performance?

The next idea would be to replace the exhaust and 2 options

1) Bgm pro big box touring

https://www.bgm-tuning.com/es/product/bgm1011tr-auspuff-bgm-pro-bigbox-touring-bbt-vespa-px200-rally200/

or

2) sip road 3.0 exhaust

https://www.sip-scootershop.com/es/product/escape-racing-sip-road-30_24165900?usrc=Sip%20road%203.0

What is the best exhaust /cylinder combination discussed?

suggestions are accepted

Thanks!!

https://www.sip-scootershop.com/es/product/cilindro-sip-200-cc_41470730
and
https://www.sip-scootershop.com/es/product/escape-racing-sip-road-30_24165900

How it performs will be down to how the carb is adjusted.

Hola compatriota. Con las restricciones que hay alli en Espana y en especial en europa solo te recomiendo un escape al estilo original(exhaust box), de estos que van ubicados justo debajo como el original.
Con el tema de la compresión 110 PSI no esta tan mal, quizas solo necesites unos anillos del piston. Han apretado la culata?, la bujía esta bien apretada? has quitado la culata para ver si el cilindro esta rasgado?
En cuanto al tema de los cilindros hay muchisimos, ahora SIP tiene un recambio de cilindro que es de aluminio y barato pero tambien hay muchas mas opciones. Yo te recomiendo el Malossi pero todo depende de cuanto te quieras gastar y tal. Saludos de un sevillano.


Check your cylinder first, make sure that the cylinder wall is not damaged, grooved. Tighten the cylinder head. 110 psi is not terrible but you could try new rings too. As far is the exhaust, knowing the strict regulations there I would recommend something like an exhaust box.

Perform a "wet test" and then compare the before and after compressions. Perhaps just a hone and rings are all what's needed?

Hi,

I wouldn't bother going for original 200 again...
when you have the option, I would recomend going for a bit more ooooomph...

I've tried various kit, but for my daily commuter I have this Malossi 210 Sport;
https://www.scooter-center.com/en/cylinder-malossi-210-cc-sport-mk2-2021-vespa-p200-rally200-with-cylinder-head-m3118591?number=M3118591

Very easy plug'n play with just a minor upjet needed.

And to complete it, you fit the Polini Box;
https://www.scooter-center.com/en/exhaust-polini-original-road-box-vespa-p200-p2002022?number=P2002022

That combo along with original (upjeted main) carb and crank and gearbox is a winner!

Good luck!

Yeah, agree, that's a nice and easy combo to get you going... if you have to split the cases, you may as well drop in a 60mm crank but just bolt the 210 on and go.. with jetting and timing adjusted of course!!