I bought my first sled about 2 mths ago.It's a 1991 Exciter 2.New top end,new crank bearings,new boggies and bearings,and new fuel pump.Hood was cracked up at some point,repairs were made(glassing).I am normally a motorcycle gearhead,and know Yamaha 2 stroke motorcycle history.(running like a raped ape).The track,wear bars,and carbides are in good shape.Sled had 6000 miles on it.What do i need to look for/expect on this machine?Hopefully i made a good investment.I don't expect this thing to last me 20 years,just a few reliable ones..Thanks for any advice..