449/511 Breather hose mod

Whats wrong with the gas tanks...?

Yeeeaaahh

The gas cap tacos out after a while. So to fix it you have to buy this expensive Husqvarna hard part. So Ty stood there over my 511 and redesigned the actual opening of the plastic tank which will have a simple locking insert and cap for cheaper than Husqvarna and it will be anodized as well.

I bought the expensive gas cap haha

I would love to get a copy of the rear aluminum gas tank on the SimonPavey bike or even just the plans to the tank. Anybody have a contact with these guys? That is a much better idea than the tanks that fit over the top of the frame backbone and cover up the air filter.

Has anyone seen a design similar to this tank - it would be just great! That tank and an extra quart of cooled oil and we're exploring the desert in eastern Oregon in style! You could also hang some bags on that baby to carry enough gear for an overnight!

You could even incorporate the blow by recovery system into the fuel cooled tank.......Tinken-I wish I had your engineering and fabrication skills!

Now, about a higher 5th and 6th gears............

It isn't fully mounted yet, still waiting on more parts to come in, decided I would try fitting it first.

This would be the way i would do it... I would do only one test before i pulled the trigger on it and that would be to plumb in a hose to the drain plug hole and fire up the bike to see how much if any oil comes out with the end of the hose about where the bottom of the auxiliary oil tank is mounted...... I would run the test with 1100cc of oil..

, ,

Temporarily installed a breather/drain hose on the bottom of the airbox. Bought a Fly Racing gas cap breather hose. Worked great. Routed it down to the skidplate.

Not sure why pic went sideways...

I just put a plastic valve cap on mine.

Where does your oil go if it goes into the airbox?

On that air box drain tube, my SMR came with a 50mm bit of hose that's capped off. For road bikes, oil on the ground = bad, better to keep it in the airbox!

Stays in the air box , I like seing how much oil gets in there, gives me a better idea of the blow by .

I havnt had a chance to see if I have any 'oil in the airbox' issues but would be interested in this just to get more oil capacity. Under a liter for any big bore bike let alone a higher RPM race bike is crazy. My old CRF450 held about a liter but it had separate gear box / clutch oil so much less broken down oil and contamination to the top end. Keep up the great work!

Not trying to complicate things at all but how about a skid plate that has this oil tank built into it already? I am assuming maybe a gravity issue with oil flow might be an issue? Just looking at the pics and was curious. Not sure how much room there is. I dont currently have a skid plate so I have no idea how tight things are.

I just finished trying to find a Dakar bike that had a bolt up oil tank/skid plate, they are out there but probably custom and bank. I like Tinkens original breather idea but think he over engineered the box .

Eff this noise, Ladds! Lets figure this one out!
I think what im gonna so is find some sort of fitting or make one that I can thread into the oil fill whole as proposed by Tinken and fab up a recirc system utilizing an exisiting oil recirculation system.
This stuff is bonkers!