Doherty Engine Vent Systems

You install an after market air cleaner or velocity stack and want to get rid of the ugly stock engine breather crossover tubes.  What do you use to make your engine breathe correctly without having engine oil mist ending up on your exhaust or on your right leg or, most of the time, both? It’s the question I get all the time. After testing many systems, I found out that the Doherty Vent Kit is probably the most efficient system to reduce the blowly oil mist. In addition, the Doherty Power Vent reduces crankcase pressure and prevents gasket leaks. Another reason you see it on most of my customs is that it is small and quite good looking, which is, as you can imagine, very important to me. Available for head or crankcase breathing engines, with kits for both Evo & Twin Cam engines. Doherty Machine.


4 Responses to “Doherty Engine Vent Systems”

  1. 1 Bob FXR Jan 7th, 2007 at 4:49 pm

    I agree. These vents are the best working. I cut and run the plastic tubes to end up tucked at the bottom, between the cylinders

  2. 2 jim shell Jan 11th, 2007 at 1:01 am

    the best vents available, have had one set for over 5 yrs. everything doherty makes is always top notch thier powerpacc air cleaners are the best to be found.

  3. 3 drvnher Jan 11th, 2007 at 11:08 am

    used doherty stuff for years always top notch stuff always do what the were advertised to do.

  4. 4 high mileage oil Sep 11th, 2011 at 4:25 am

    what causes a motorcycle motor to have oil leak from blow by tube?

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