I've heard and seen nothing but good things with the Christini bikes. But I've never rode one. ON PAPER there the coolest thing out there. My CR500AF with a IRC 140 MB5 rear tire tractors and hooks up WAY better in low traction situations than my WR does. If 2 strokes are difficult to ride in low traction situations, then why do they power most trials bikes? Too bad you are in New York. We've got a few trails out this way for two strokes. I use to own a CR500. It did almost anything. But certainly does not hook up better than my WR450. That's why I got rid of the CR500 and kept the WR. Sounds like you need to put a new 140 M5B on the WR. Also might depend on what year WR you own.