none that i know of ask matt plapp for sure but here goes if you just need the info.mix 1st tank 50-1 with the oil injection too.first few hours vary throttle graduating up to 4000rpm,next couple hours vary it up to 5000 or so then on up not holding any rpm for long period.
stop and start from idle up every 20 mins or so.after about 8 hours or so rev er up to top end and back off and back up then it should be good to go.that's what the directions for my dads xr4 is,wrote on the owners manual by the dealer.