2007 WR 450 Breather hose and Airbox drain mod!!!

Had two problems: First, messy airbox due to engine oil overfill, caused by breather hose routed to airbox....

Second, airbox drain hole "plugged" with that short clear hose... so oil and water from washings or deep crossings would not drain, but rather clog the filter element!!:thumbsup:

So, I disconnected breather hose from airbox, and plugged the hole (Copper plug in picture).

Next, connected breather hose to PVC T connector from garden section in HomeDepot.

Third: Threw away clear drain hose, and replaced it with a real clear hose connected also to Pvc T.

Fourth: Another clear hose connected to Pvc T , and directed towards soil, with the other carb drain hoses.

Final result: Engine oil excess routed to ground, not into my airbox...and also a proper airbox drainage to manage "generous bike washes", or deep crossings. Some explanatory pictures:

foto3.jpg

foto4.jpg

So far, 300 kms and no complaints... Hope it helps someone.:ride:

Greetings from Chile.:)

Had two problems: First, messy airbox due to engine oil overfill, caused by breather hose routed to airbox....

Second, airbox drain hole "plugged" with that short clear hose... so oil and water from washings or deep crossings would not drain, but rather clog the filter element!!:thumbsup:

So, I disconnected breather hose from airbox, and plugged the hole (Copper plug in picture).

Next, connected breather hose to PVC T connector from garden section in HomeDepot.

Third: Threw away clear drain hose, and replaced it with a real clear hose connected also to Pvc T.

Fourth: Another clear hose connected to Pvc T , and directed towards soil, with the other carb drain hoses.

Final result: Engine oil excess routed to ground, not into my airbox...and also a proper airbox drainage to manage "generous bike washes", or deep crossings. Some explanatory pictures:

foto3.jpg

foto4.jpg

So far, 300 kms and no complaints... Hope it helps someone.:ride:

Greetings from Chile.:)

Excelente idea blackdog9, creo que intentare eso con mi WR. :ride:

Looks like a 1.5 - 2 beer job in the garage... nice work and good pics, blackdog- thanks for posting. :thumbsup:

Had two problems: First, messy airbox due to engine oil overfill, caused by breather hose routed to airbox....

Second, airbox drain hole "plugged" with that short clear hose... so oil and water from washings or deep crossings would not drain, but rather clog the filter element!!:thumbsup:

So, I disconnected breather hose from airbox, and plugged the hole (Copper plug in picture).

Next, connected breather hose to PVC T connector from garden section in HomeDepot.

Third: Threw away clear drain hose, and replaced it with a real clear hose connected also to Pvc T.

Fourth: Another clear hose connected to Pvc T , and directed towards soil, with the other carb drain hoses.

Final result: Engine oil excess routed to ground, not into my airbox...and also a proper airbox drainage to manage "generous bike washes", or deep crossings. Some explanatory pictures:

foto3.jpg

foto4.jpg

So far, 300 kms and no complaints... Hope it helps someone.:ride:

Greetings from Chile.:)

Haven't you just undone what Yamaha attempted address/correct with the earlier 400/450s where the crank breather hose just hung down the side of the engine. If you stalled in deep water and attempted to start the bike water would get sucked up the hose into the engine. Looks like you have reverted to the old/flawed design.

Yup you´re right.... only one difference with this Mod : water can´t be sucked up because there´s an upper "snorkel" (airbox drain hose), so negative pressure would still suck air instead of water from submerged inferior hose. Only way to suck water would be submerging inferior (drain) and upper (airbox) hose, meaning that your bike is up to the airbox with water:cry: so same would happen without the mod in that "misshap"

Ride safe... Saludos from Chile to Beautiful California... I´m hoping to race Baja California before I die...ha :thumbsup:

Yup you´re right.... only one difference with this Mod : water can´t be sucked up because there´s an upper "snorkel" (airbox drain hose), so negative pressure would still suck air instead of water from submerged inferior hose. Only way to suck water would be submerging inferior (drain) and upper (airbox) hose, meaning that your bike is up to the airbox with water:cry: so same would happen without the mod in that "misshap"

Ride safe... Saludos from Chile to Beautiful California... I´m hoping to race Baja California before I die...ha :thumbsup:

Aha! I missed that little detail:thumbsup:

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now