Home Forums Rotax Max Lettered Cylinder Reply To: Lettered Cylinder

#63575

Christian Fox
Participant

The letters are the production batch codes. They vary by year, and they vary in performance, sometimes by a lot. Many thousands of dollars are spent on dyno time trying to find the good ones. No one is going to just tell you what the good ones are. Once good ones are sorted out, they fetch a lot of money. The top ten in Junior at any National event are all likely on the same cylinder batch.

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