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This came up in conversation at the track: E-Start on a sumo would be awesome.
Well, it looks like Yamaha has come up with such an option. Take a YZ450F, add a WR transmission and e-start, 18" rear wheel, 15lbs later job done. If you go WR you get an EPA approved tank, spark arrester baffle based exhaust and lights for an additional weight penalty. You can actually add e-start to the F as it's the same cases, but you'd need to swap cranks... might be easier to just swap an F transmission into the FX if that's what you want?
Thoughts?