Originally Posted by Lumpy
While I haven't replaced the stock air filter on my LT with a K&N, only because it's a sizeable job and the gain is so little, I have used them in every other bike and vehicle I have owned in the past 20 years. I have a towing business and have several 1-ton "light duty" trucks and all have K&N filters in them. My oldest truck is a '96 Ford F450 super duty and it has 400,000 miles and the original 460 gas engine. Another truck is a 2000 Dodge 3500 with the V-10 and it has 305,000 miles on the original engine. Still I have a 2001 Dodge 3500 with a V-10 and 257,000 miles. No rebuilds on these trucks. No major service on the engines. The v-10 have had water pumps replaced and that's all. These trucks get severe service. The filters can't be dumping in dust and particles and still run smooth after this mileage. I servive the filters regularly and do not find any dust at all in the housing beneath the filter. I am a firm believer in the filters. But like has already been said here, they need to be serviced and oiled regularly. If they srat to shrink around the edge and one of mine did do this, I replaced it. Just speaking in defense of the filters. I also have a 1984 Yamaha Venture Royale that has over 100,000 miles and a K&N filter for most of its life. Have also used K&N's in a sand rail, ATV's and dirt bikes and have never had a engine "sandblasted". Just my experiences...
Have to agree. I had a twin 50mm throttle body on my Road Glide and a K&N, never an issue. And I guarantee you wont see much more of an air draw on a bike then twin 50's. My Toyota truck 80,000 no issues, my TURBO GT, 30,000 again no problems. In the truck and car you have a box so if you were sucking dirt it would be there in the bottom.
These filters actually perform better as they get a bit dirty and the clean to white, and then re oil to red, is key in them. I know of at least 50 bikes and cars that have been running them for years with no issues.
All the ForceWinder intakes out there on performance bikes if they were an issue you would have heard by now.
Again I equate this to oil, and spark plugs. Use what you want.
I just love to hear everyone repeat like parrots what they have been told, rather then what they have experienced.
Again, your bike, your choice. I have mine to put in as soon as summer gets here.