Tricklizard, I have an 03 RX-1 Mountain with Simmons skis and a weight transfer kit as well.
I know it sounds nuts but you need to lift the front end of your sled off the ground and loosen both front shock spring adjustment rings as LOOSE as they will go and still hold the springs. Take measurments and make sure both of them are the same distance from a given point. I went to the maximum (maybe minimum depending on where you measure from) that Yamaha recommends in the manual.
The trick is to have the springs as loose as possible and still barely hold the springs because once you let it down there will be plenty of weight to put pressure on the springs.
With the Simmons skis make sure your skis are exactly parallel. No toe out with these skis.
The weight transfer kit removes the weight transfer rods on the rear suspension. It uncouples the action between the front shock of the rear suspension and rear shock of the rear suspension. See
www.mountainperformance.com to learn more.
Here are a few other things you might want to consider. If you don't have on buy at least a 1" handle bar riser it make the sled easier to steer. Also, some bar end hooks may make your handle bars feel wider and thus give you a bit more leverage for turning the sled.
Yes going wider on the front end makes the sled a bit more stable. I have a HOLZ 41" front end on the way and have high hopes for it. The best thing you can do is make sure your sway bar links are the LONG links and not the stock short ones. Go to Yamahamotore.com and look at the parts breakdown for an 04 RX-1 mountain and it will have the longer link part number. They makes the sled easier to steer. The next step up from the longer sway bar links and going to an 11mm sway bar from the stock 10mm bar. It helps the rolling in the corners A LOT!
The amount of weight on the front of sled makes a big difference. The limiter straps and the front rear suspension spring tension are key in getting the balance just right between being able to easily turn the handlebars and actually having the sled steer where you'd like it to go.
Remember our sleds are Yamaha's first shot at a four stroke sled. There are some bugs that need to be worked out but that sweet motor makes jumping through all the flaming hoops worthwhile.
Good luck
Frosty