The XRAY 320905 - XB2 5G Gearbox Conversion Kit is built to lower drivetrain inertia for the XB2 series. It suits racers chasing sharper acceleration and handling, though it trades some long term robustness for lighter weight.
This conversion is an experimental option for serious competitors looking to squeeze performance from their XB2. Expect improved transient response, but be aware that harsher driving and high power can shorten gear life.
Keep gears lubricated with #106210 - HUDY Graphite Grease and inspect them frequently. Reapply grease after about each hour of running and set the slipper clutch to the XB2 manual guidance to avoid excessive preload.
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