700cc big bore kit, race cams, PC III, CCC end cans... No, seriously, I'd just sort out all the other bits like a decent luggage system, maybe fit a sump guard, and any cosmetics it might need. When your time's up you can throw some cash at the engine, if you think it needs it, but you'll get another 15 or so h.p. when you de-restrict it, so you'll definately notice that. Good luck!

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-- Triumph Explorer 1200 --