Swing arm Piaggio Maxi Engine Gilera Runner and Co.

Good news for performance fetishists and lovers of Piaggio automatik two-stroke-engines.

For you, we further developed our BGM PRO swing arm to reinforce the engine case, optimized it and have it produced in a new design:

Swing arm BGM PRO Superstrong Piaggio 125-180 cc 2-stroke BGM7900N


The legendary BGM PRO swing arm

bgm pro motorschwinge

This idea originated during the construction phase of our shop demonstrator. A reasonable reinforcement of the engine case was particularly needed for the 50 hp strong twin.

Usage notes

As for the previous version, some things have to be considered in order to link the swing arm to your engine whilst protecting the large, and now rare, Piaggo two-stroke engines:

  • fits Piaggio 125 -180 engines with disc brake
  • exhaust support at engine case needs to be adapted
  • exhaust systems need to be adapted for assembly
Order your swing arm here

Easy assembly

First, the engine case has to be adapted. The easiest way is to “adjust“ the screw, which is screwed through the support from behind, with a gap of 5mm.

BGM7900N_2 BGM7900N_5 BGM7900N_4

For security reasons you should, as a trial, assemble and check, if it runs parallel to the surface at the Vario cover. Shortening by at least 5 mm is usually always necessary. Depending on the combination of assembly parts, the gap can vary and be up to 10 mm wide.


Fastening the rear wheel

The two-rowed self-aligning ball bearing can be fitted at a maximum angle of 5°. The swing arm comes with longer screws to fit the rear wheel. The screws should be fitted with liquid screw locking.


Security advice

The swing arm was produced for race use only.

There are many variations of hubs, rims and engine cases on the market.
Therefore we advise you to thoroughly check if the parts fit before the assembly and finally to very thoroughly assemble the parts.

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