Posted 14 June 2012 - 12:15 PM
Why don't the OEMs use a slip over rubber sleeve and hose clamp to mount the filter? It would provide much more uniform clamping force on the sealing surface, and eliminate the foam-airbox sticking/grease/neoprene/leaking dilemma.
Posted 14 June 2012 - 12:56 PM
Posted 14 June 2012 - 06:10 PM
The absence of the flash screen does nothing for the engine at all, at least on YZ's, as it is less restrictive than the element itself and the protection against the very real risk of a fire is worth keeping it. Doug Henry's SM team mechanics did several dyno tests of a lot of different air box configurations and ended up leaving it almost completely stock, including the screen. They found no benefit in removing it.
I never grease the sealing flange. If you use a good enough filter oil, that will seal the flange perfectly well.
One of the interesting aspects of the claims made by Loudmouth is that one of the places most likely to fail to seal on a CRF is the big "hose clamp" that secures the air boot to the filter flange. Food for thought.
Posted 15 June 2012 - 06:12 AM
I have reeds instead of a screen, but the sealing area was the part I was wondering I guess... Out of curiosity what oil do you use, that stays tacky but doesn't glue itself to the airbox? Do you run a neoprene gasket? I've never seen scoring or had bearing trouble, but I do know some fines are getting past, because I've seen some stuck to the cage from time to time on the dustiest days.
Posted 15 June 2012 - 07:46 AM
Nothing 100% stops all of the very finest dust you'll run into, unfortunately, and some gets past the very best filtration. if you really want to know how well your filter is working, remove the top of your FCR carb. There's only one way for the dust you see in there to get there.
Posted 12 October 2012 - 02:52 AM