Is there a part that goes in place of the vac hose that is still connected to the tranny case after the filter is instaled?
There is a vacuum hose connected the original air box to the tranny case.It is a hose with what I think is an" oil katch box" in the middle, and it looks like a vacuum hose. mabey a tranny cooling vac.type vac-?!?!?
MotoSport Staff
Expert
Over 3 years ago
Location: USA
If you're referring to the XR/CRF50, that hose is actually a crank case breather hose. when you eliminate the stock air intake, with this clamp on style air filter, you will want to get a Crankcase Vent Filter from K&N and attach it to the hose. Unfortunately we do not stock this item as we have scaled back our 50 parts. You can find this filter at any local dealership or try contacting two brothers racing.
Over 3 years ago
that hose is for taking the oil vapors inside the crankcase and burning them with the air/fuel mixture