Vespa Polini 210, bgm PRO 60mm, Dellorto SI26 – Tuning test engine – part 1

Lots of scooterists out there and here in Scooter Center to, dreamt about a Polini 207 kit made of alloy with the hard wearing Nicasil plating. This dream already came true!

We had one of the first kits fitted to a 10 hp standard P-range engine aon our P4 dyno. The bullet proof Polini layout was even better in the alloy trim. High torque low down the rev range made it t the most desired kit right from the start.

Polini introduced more and more toys for boys. Lots of stuff to get higher power output and an even bigger grint to your face. Beside the airintake/bellmouth to get the most out of the SI carbs, a Polini 210 kit for 60mm stroke is down in the pipe line. This kit is specially made for the 60mm crank and gives 221cc.

With lots of trouble free miles during the last 1 1/2 year we are so happy with the kit, that we decided to build a Polini test engine and show you what we think is worth to take care of. As soon as the 60mm version is out, we will replace the 210 for the 221.

The games started today and this is stored into the workshop. And the dyno is waiting despertately.

Cylinder kit Polini 210, cylinder head MMW and Worb5, airintake/bellmouth Polini for SI carbs, 26mm SI carb and one of the bgm PRO 60 mm crank.

All parts are carefully checked and everythings is going to be prepared for fitting.

First view is the engine casing, that will house all the other toys we saw here.

At the moment the only P 200 casings are branded as Malossi. Beside of the name nothing major changed though.

Care we have taken for the inlet area. The inlet area is carefully cleaned, blue orinted and optimzed.

For the heart of the engine we opted for the BGM-Kurbelwelle. Perfect inlet timing for high power, clean running and good fuel consumption are the key words of the good designed crankshaft. The very well made crank leaves nothing to be desired.

An additional nice feature of the bgm PRO crankshaft is the enlarged sealing area at the taper of the flywheel side. Thanks to this you can use the far superior FPM oil seal with dust lip. Compared to the common NBR oil seals the FPM oil seal has a much better reliabilty.

NNext we will have a look for the Polini air intake improvement. Watch this space!