Thanks to everyone for the answers
QUOTE(rickyb24 @ Jan 14 2008, 08:54 PM)

Instead of buying a sled thats designed to run with a 121" track and adding an extension, why not just shop for a Striker. I have all of the features the others are talking about and it's all stock. No cobbing no hassles , just great factory set up. I think 136" is the best rough trail set up you can ask for.
I might if I can find one I am not oppose to it but it all depends where the deal is I am actually considering a 144 with tipped up extensions and a 1.5
QUOTE(Blademan @ Jan 15 2008, 07:48 AM)

John, The 7X2 2000 was the first year. Many changes to the 2001 Models including a differnet chassis (longer by 1.5"), aluminum tunnel, new look, updated M10B etc. in 2002 they came (most) with the plastic belly pans, console, different seat configuration. They also had another chassis modification to accept the power valves. Only 48 2000's made it out the door and about 78 2001's after that there are about 500 total 2002, 2003, 2004, 2005, 2006, 2007 and 2008 sleds. Look for a 2002 or later with plastic belly pans, they dont crack and look much better after some wear and tear. As for the difference between a Striker and a 1WX the only difference is a longer tunnel (buy it from FAST) and the rails. You could buy a 1WX get a new tunnel from Fast buy 136 rails or add extensions and your in business. As for the motor stick with the 700 if you can. The 800's can be very reliable but you will need to check the main bearings especially the center ones for case clearance .001 to .0015 and keep track of the power valves and you will be very satisfied with the 800. As for the twin pipes or an HPO. If you can find an HPO they need the M-16 taken out and a M-10 or a Airwave and you'll be in business. The twin pipes work quite well. Gerard made them so that the detonation was on the conservative side so that they were more reliable but still had some great power. Gas mileage difference between the twin pipes and single not that much about 92 miles on a tank with twin pipes. BTW the 600, 700 and 800 pipes are all the same. The beauty of the Blade is the handling and how its built. Replace the bearings, service the motor and clutches, new track, paint the hood you'll have a brand new sled!!!
I have ben around the polaris motors for a while he have had all of the above mentioned in the family and the 700s are not totally imune to the crank problems of the 800 its just less common, and we have been able to tune them with tempa-flow and egts and get them all getting good enough milage that I wont say because nobody will beleive me, exept for the 600s(yet) for some reason I would actually love to put my Flannery 800 xcr into one but I just dont think it would happen.