I found the combination of a K&N air filter with the Polaris bellmouth intake rubber 'better-than-Triumph' snorkel thingy didn't work. The K&N just didn't marry well with the Polaris mod. In my case it was better to just yank the stock snorkel, keep the K&N, and forget the Polaris rubber intake.
Polaris intake rubber thingy thread. 
