My Rappy can sit for a month & it'll start @ 0 degrees. I let the fuel pump cycle 2x & start it, then it usually dies. Lol. I let the pump cycle again & then it'll run fine. Never any starting problems. When its that cold it does turn over longer before it fires.
A tech manual would be a good thing to have for reference. A few things you might like, OMI steering stem mount. 2007 rear cross drilled rotor. Everyone here will be happy to help you spend your money.