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Posted by Troll
- February 19, 2017, 15:05:06 PMI have had and currently do have K&Ns in almost (they don't make a filter for the W-650) every vehicle I own. There is no comparison between a paper filter and one that lets the engine breath. I saw a 10 hp difference on a dyno run of my 98" shovel head, going from a hi-pro foam to a K&N...Your engine WILL run leaner with a K&N than with a paper filter....so you may need to re-jet or raise the needle. The big thing is that if you are currently running on the rich side of perfect, it should correct that for you. They will last forever, and the filtration is far superior to a stock filter. A trip through the Utah red rock deserts proved that to me....red dust in everything, but not a speck inside the filter.....
Posted by CDNRatMan
- February 19, 2017, 11:21:19 AMI can only say that I really like my K&N air filter. I am running Roadhouse exhaust, no mods to air box or carb. The K&N filter is really simple to take out wash in soapy water rinse it under a gentle spray of running water, let it dry overnight and spray it with a really light film of oil, let dry and you are ready to ride again, and they last a long time.
Posted by Tfrank59
- February 19, 2017, 10:41:19 AMI've never used a K & N on my bikes, mostly because of cost, but how big a deal is it on performance with a drifter 800? I have custom exhaust and have rejetted my carb, so I guess the only thing I haven't done is the air filter mod or even just replacing the stock element with a K & N. The cost difference is pretty significant to me: stock $20, K & N $53.