Fuel Primers seem to be a love it or hate it item. I had one in my 96 Grand Touring and loved it, definitely less cranking if you knew how to use it right but over-use would flood the engine. If your choke system is working well don't think I'd bother.
As for a fuel shut off valve I'd be surprised if your sled doesn't already have one?
Wife 08 Vector
Son 2012 Nytro XTX
Primers are great. I always turn my fuel off when trailering. If only I could remember to turn it back on when I get to my destination. So excited to get riding, I'm always pulling and pulling trying to start it and then remember to flip the lever.
Don't take your organs to Heaven
Heaven knows we need them here
If you trailer without shutting the gas off, and your needles and seats in the carb are marginal or failing, you can fill the crankcase with raw fuel. When you try to start the engine, the fuel ends up in the top of the cylinder and you will have a hydrolock and wonder why it won't turn over. Then you pull the plugs to see what's going on, give the rope a yank, and fuel spouts out the spark plug holes all over the place. Great. This is what you need. Fuel, oxygen, and an ignition source. I was lucky, (no fire) but I also learn from my experiences; I ALWAYS have shut the gas off when I trailer.
I had never had a problem before that; just takes one time. And when I took the carbs apart to check the needles and seats to the float, they appeared fine.
2007 RMK 700, 2008 RMK 600, 1995 AC Prowler 2-up, 1980? AC Cheetah
Hmmmmm, 97 XC600, it should have a shut off valve. Look for a small metal block, about 3/4 inch square, with a red handled lever on the top. Should be mounted inline on the gas hose between the fuel tank and the fuel pump. Primer..... you going to be ready to take off both carbs, drill a hole in both of them, put in a fitting, and run fuel line to both carbs, the primer and the gas tank? Just wondering.
Faster than a Speeding Mullett
03 XCSP 700--03 Indy 500--01 XCSP600X
01 Scrambler 500--87 Honda XR600
05 Victory King Pin and one Water Buffalo