Nice. Did you also plug the hole in the filter back plate where the original tubing went to feed the hot, oily, oxygen depleted air back into the intake manifold? I kept my original tubing in tact and tried to maintain a downward flow with the tubing to the catch can on mine. If the EPA didn't deem it necessary due to emission standards, then the MOCO wouldn't have put these tubes on the breather bolts and fed that "shtuff" back into the engine.

Definitely gets a 5HP increase with this mod.... (just kidding, I have no idea, but it will help keep your piston heads and engine cleaner)

 

I picked up the new Trask vent cover at Daytona bike week, very nice billet piece.

 

Now that you've had this for a little while, I'd be curious as to your opinion on it. Do you think you'll still vent the breathers on the air cleaner?

My 2020 is twin-cooled - I've been kicking around this or venting through its unused oil return passage that is used for air/oil-cooled engines only.

 

According to what Trask told me this eliminates the need to do anything else with the stock head breathers. I wasn’t getting any blow by before installing this just wanted to help prevent any oil getting sucked back into the throttle body.

 

I didn't think I was either until I replaced the intake manifold - check this out. This was quite a while after I did the bypass.

 

Wow, that doesn’t look good! The stock intake and throttle body was clean as a whistle when they were changed during my 128 install, they had about 14k miles on them.

 

You can buy one of these at an auto parts store, it’s a rubber cap.

 

@jake24lt Nice Job. Just starting then project and this is exactly what I had in mind - love the 90's. Do you have an issue with this running to the ground of have you added a catch can (if so which one)?

 

'17 Road King front cyl

Rear cylinder at 10k miles.

My version of a bypass, just ran drain out the bottom with a baloney cut to the hose like the old days.
The vented transmission top cover that Trask sell makes the most sense to me. I plan to drill a hole in my cover and vent it.

 

FYI, my 19th Street Glide transmission cover is already vented from the factory. I would think of all the touring bikes are. See item 12 below