RG500 Transmission Upgrade

RG500 Transmission Upgrade

New input shaft and driven gears kit for the RG 500 transmission (can be used with the RG 400 too). This kit is a development of Maranello Engineering in Italy. The main features of this kit are:

  • Billet machined high strength replacement components for a taller first gear (12:28 instead of stock 11:29)
  • Positive engagement undercut driven 2nd, 3rd and 6th gears

The first gear ratio is made closer to second by replacing the entire shaft that first gear is machined into. This design maintains proper tooth profile for long wear and low friction. The new gear ratios produce a noticeable narrowing of the gap between 1st and 2nd gear. This brings 1st gear into the realm of useful options in the tight stuff. Additional features are:
  1. Needle bearing supporting 1st gear
  2. Fully undercut dogs and slots for the 2nd, 3rd and 6th gears (to ensure quicker and more positive gear shifting)
  3. Latest generation anti-friction, anti-wear treatment on the 2nd gear hub
This transmission kit only requires replacing the gears that most commonly fail, which saves lots of money over buying both gear shafts and all 10 gears.
The RG500 transmission kit is supplied complete with that’s required for installation including bushings, washers and snap rings. What is not included in the kit is reused from the stock unit.
Functionality of the kick starter and the oil pump is preserved. I walk you through the RG500 Transmission Upgrade here. Manual: Maranello Engineering also offers an installation manual. It can be downloaded here: English Manual