Clutch cover bgm PRO Superstrong for Vespa Largeframe (PX & Co.) - CNC-machined

Now available

You may have already spotted an Easter egg in one of our videos ;-) but now you can find it in our webshop

It is questionable how long the supply of spare parts from Piaggio will be guaranteed for some components. Unfortunately, the quality of clutch covers from the original manufacturer has also fluctuated in recent years.

The clutch covers from LML were sometimes a reliable alternative, but unfortunately LML no longer exists. and various attempts by other companies can be laughed at as well-intentioned interpretations. The manufacturers Ramp and Silking should be avoided in any case. Apart from the basic material, these clutch covers have nothing in common with the original.

With this in mind, we have dedicated ourselves to creating our own clutch cover.

Development

The requirements were that the cover should be usable with original parts, as is always the case with many of our own developments, and that it should show further improvements.

The clutch cover for Largeframe from BGM PRO Superstrong CNC therefore fits all clutches currently available on the market. Whether with 6 springs or 7 springs of the old design or the latest models with 4-disc CR lining material and enlarged CNC clutch basket.

One of the reasons for this was that the bar in the clutch cover had to be removed if the original cover had to be machined for the CNC clutches. The BGM PRO SUPERSTORNG clutch cover therefore has an adapted contour that allows the bar to be removed and thus supports the oil supply for the separating mushroom and the protected Ultralube principle of the bgm Superstrong clutches.

The inner contour was therefore determined and defined very quickly. A greater challenge, however, was determining the position of the bleed screw.

The worldwide scooter rider network is full of reports that the engines push oil out through the bleed screw. So we thought about whether there was a better position for the bleed screw. Always under the condition that it would fit on a vehicle left in its original condition. The first attempt was to align the hole with the direction of rotation. A fatal misconception.

Although the hole is positioned at an angle to the direction of the oil flow, significantly more oil is pumped out of the breather.

After testing three alternative positions and designs of the bore channels, we are almost back to the original position of the vent. However, the hole is located further out in the cover at a slightly different angle and therefore no longer receives as much of the centrifuged oil. With this position, it was possible to run a 221cc Malossi MHR engine at over 9500 rpm continuously with an oil filling quantity of 500 ml without oil being pressed out through the bleed screw.

Clutch covers are also available as a variant for the older Largeframe models. Here, the clutch cover is designed higher to create space for a PX clutch.

The old engine housings of the VNA to VGLB engines with their flat clutches are flatter than a Sprint or PX engine housing - the sealing surface for the clutch cover on the VNA to VGLB engines is therefore practically closer to the crankshaft. This gap is compensated for by the BGM PRO SUPERSTRONG clutch cover and therefore offers the advantage of using a normal PX clutch on these engines.

Due to the dimensional compensation in the clutch cover, there is no risk of the rear tire rubbing against the clutch cover. The flat engine housing leaves sufficient space to the tire sidewall.

The matching clutch arm for the BGM PRO clutch cover has a double O-ring seal and the option of attaching the clutch cable to a position for shorter lever travel.

The inner position on the clutch arm is intended for the use of adjustable clutch levers on the handlebars, as these levers take up less pull than the standard lever on a PX, for example.

The clutch arm is already equipped with all the clearances required for the use of reinforced clutches.

When manufacturing the clutch cover, we initially opted for CNC production from solid material. This means that we always have control over the material used and access to the material certificate. The high-strength material used and the CNC production allow us to guarantee very low tolerances and consistent quality.

Anyone who is now curious will have to be patient. The final acceptance of the samples has been confirmed and we expect the delivery date to be in 2022.

Complete with clutch arm, the clutch cover will be priced under €200.

We will provide you with more information on the blog and in the store when it goes on sale.

Have a good ride