My Ryker Rally started having misfire issues. It would rough idle, then stall after a long ride and yellow Engine light would illuminate and then occasionally LIMP HOME mode. It had the dealer baffled at first service first trip in, cleared mis fire code and gave it an ok to go (when cold). When col...

The 600cc is 47 hp, the 900cc is 77 hp, almost double hp. If your planning on doing any highway cruising or two up riding the 600 may not cut it. The extra money for the 900 would be a worth while investment longer term for ride flexibility in my opinion..

You could void the engine warranty, so I would be careful doing those mods..

You already have 3000 miles on your Ryker? Thats the first oil change per the maintenance schedule unless heavy use/dusty conditions..