Ramair crankcase breather mod

[Pete]

I fitted the ramair filter at 28000km with the crankcase foam filter. I don’t baby the bike and often use full throttle in top gear when on group runs. After getting home from a recent run I could could see a faint vapour at the back of the motor. The motor has done 40,000km and Is due for its 10,000m (mobil 1) oil change. I’m a little disappointed it’s showimg signs of blowby this early but as one famous Aussie once said “such is life”.
I used a 3/4” hole saw to drill a hole in the opposite position to the air sensor on the Ramair and machined up a two piece nylon fitting that I glued together with loctite “all plastic” polypropylene glue to form an elbow.
I based the elbow fitting dimensions on the ramair air sensor and allowed for a 1/2” inside diameter hose.
Then connected the crankcase breather to the ramair filter by routing up the rear of the motor and forward under the tank.
Photos attached.

Then told the missus the motor was buggered and we need to start saving for an engine rebuild with upgraded Ho to make it stronger

 

[jake shaw]

Good Idea.

 

[Rocket Scientist]

I'm guessing the large square cage like device is a type of pre-filter to keep the Harley's out of the filter proper ?

 

[Claviger]

@Pete great work. If you want to take it a touch further and really get the most out of your work, run a catch can between the case and filter. Still pulls vacuum but keeps you from recirculating the oil vapor.

 

[barbagris]

Neat.

 

[CamaroCarl]

Great idea! Nice job.

 

[1olbull]

Perhaps a tad obteuce here, but I just do not see the wisdom in routing crankcase crap into the intake?

 

[Pete]

@Pete great work. If you want to take it a touch further and really get the most out of your work, run a catch can between the case and filter. Still pulls vacuum but keeps you from recirculating the oil vapor.

Thanks
I’ll certainly look at that

 

[Pete]

Perhaps a tad obteuce here, but I just do not see the wisdom in routing crankcase crap into the intake?

I know where you’re coming from but doesn’t the oem set up connect to the standard air box.

 

[Rocket Scientist]

I know where you’re coming from but doesn’t the oem set up connect to the standard air box.

Ya Bull