Mmmm don't know about that. I'm beating the 511's i race against with my 502x. It just seems quicker over a lap. The guys who've got a 511 and ran my 502x have been very impressed but let's not start this again lol, each to their own. I went shaft drive for ease of maintenance and Scotlands weather can be treachorous at the best of times so the drivetrains a little more protected.
Scotty....
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