Catch cans

[jasonu]

MNZ.co.NZ & search the rules. Never heard of that though.

Not sure if it is a local track thing or summat else. If it is true though I would have a hard time complying unless the officials involved could prove that there was an issue specific to the disk motors dumping more on the track than other bikes.

[Pumba]

MNZ does not say how much it has to hold .... Just the following :

10.13........

And this as well

10.13.3 For Championship road races and endurance road races of more than 55
minutes – any breather pipes that come out of engines or transmissions must
discharge into the heat resistant catch bottle. The breather pipe’s must be of a
clear reinforced translucent material and be visible to the rider in a riding
position.

[Yow Ling]

For convenience , put a small hole near the bottom so they will never overflow

[F5 Dave]

". . .The breather pipe’s must be of a
clear reinforced translucent material and be visible to the rider in a riding
position."

visible to the rider in a riding
position?!?? Heck maybe Hamish hanging off like a loon.

BOB is 55min +1 lap. Maybe we should make it 53min +1 lap?

[Pumba]

visible to the rider in a riding
position?!??......

Yea, when I first read the rule book a wondered how old that rule was and what the hell happened to result in someone dreaming it up.

[TZ350]

Not sure if it is a local track thing or summat else. If it is true though I would have a hard time complying unless the officials involved could prove that there was an issue specific to the disk motors dumping more on the track than other bikes.

After a few MT Welly wet meets recently there was a bit of oil seen on the track, and some of the 4 stroke boys started pointing the finger at the strokers, a bit rich really, all things considered but hard to argue with considering our oil rich carb blowback into open air.

There is no new rule or whatever, just a push by the organizers for the strokers to clean up their act. And if you come in with with the back of the engine or your right hand boot all wet with 2-stroke oil, what are you going to say ... "Its Not Me" ... that should work ... not ... well it didn't work for me anyway ... so there you have it



So I made an Air Box come Catch Tank with Scavenge Pump arrangement.

[koba]

visible to the rider in a riding
position?!?? Heck maybe Hamish hanging off like a loon.

BOB is 55min +1 lap. Maybe we should make it 53min +1 lap?

By bringing them ahead of steering stock.

Good point about the BOB.

I remember this being a part of car racing rules, the volume was based on the size of the engine, I think Min 1 litre catch volume for engines under 2000cc and 2 litres for over that. Not sure about bigger engines as had nothing to do with them.

I guess ideally it should be able to contain all the oil in the engine and/or gearbox plus a bit.

Edit: Naa, that's crap; what am I thinking?! Much less than that but perhaps half is a good measure?

[koba]

Yea, when I first read the rule book a wondered how old that rule was and what the hell happened to result in someone dreaming it up.

I had my RG150 set up like that and it was quite useful.
I could tell when it was pumping oil, as it did a few times.
The sealing surface between the crankcase and gearbox on those bikes is tiny, I believe a leak there caused mine to build pressure in the gearbox.

My lesson was to make sure the gearbox end of the hose was very securely fastened...