Performance Differences between Model Years

[Paulo]

Are there any performance difference among all the model years. In other words, is any type of stock engine faster than the other? Thanks!

[snowmobilejack]

I'm not aware of any differences in HP between Kawasaki and Suzuki/Spirit engines? Maybe someone else has the exact specs. But if you're looking for performance than you can do some simple mods. I know the deep snow kit is a huge improvement over the stock Kitty Cat when it comes to performance regardless of the engine and model year.

[Paulo]

Thanks, I see the posts here about the deep snow kits, they look awesome. I wonder if any other simple and economical upgrades are available for better performance.