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Discussion in 'Airheads' started by alister102, Jan 19, 2011.
Has anyone made one of these covers and willing to share instructions?
Looks a lot like a Chinese blueprint to me
Three different bolt/nuts....looks like sloppy work to me.. :huh
Ha! Noticed that as well. Isn't this the mild-custom r90s thats been on ebay?
Why the need for a central filter when the carbs are fed by pods?
That one is for the crankcase breather.
One allen head & one acorn nut. So that's what they call ARTY?
Just measure the back of your engine and fold accordingly. Use a thin gage of aluminum and don't crease the corner too sharply, or it will crack. If you can't bend it, your local sheet metal shop can do it.
Put the folded piece in place on the engine and traced the curve with a marker, then cut to fit.
Hello Jon-Lars! Thanks, I thought you might chime in-
Looks easy enough to do. Just don't ride it in bad weather. Pumping water and dirt thru these engines doesn't do them any good.
I'm not sure I follow you on this. Are you saying the cover would cause a problem or are you commenting on velocity stacks on the carbs?
I assume he is talking about the air filters.
I have set up more than a couple of crankcase breather setups and the setups I see above would cause a potentially dangerous oily mess in my experience. Those setups will very quickly have oil dripping all over the bike including your tires! At least if you rev them and ride them hard!
I have mentioned this fact before and some have claimed that it is not the case but I still don't see any photos of bikes with some miles on them. In my experience, they have to be positioned just so or speeds above about 90mph will have the slipstream wicking oil ALL over the back of the bike including the tires!
If I wasn't CAREFULLY running my vent out the back, I would have a catch tank but remember that even the catch tank has to be vented so keep an eye on that as well. That's my advise if you plan on riding the thing.
What's with designing it with that sharp bend?
Do you think the cover would be water-tight?
I rigged a catch tank with a breather on mine. I'm going to modify it a bit more when I get around to it. I've ridden it hard and checked and only have a fine mist of oil in it.
Yeah, Supershaft, riiiight.
I remember you, from another forum. Still posting over there?
I am about this.
Since you asked first, you answer first. Are you?
Watch out around here. From what I can tell, people might start expecting pictures that show that your bikes have been ridden since those photos of your bikes were taken years ago just after you had them built. They are just like the original photo in this thread. I guarantee you that that bike had not been ridden before that photo was taken. If it had been ridden much at all, we would all see an oily mess all over that tranny and who knows were else.
Surely you have ridden your bike enough by now to know that at the very least it is something to watch out for? I know I have!
Great news nella! Keep an eye on it for a while. Thanks for fessin up to the mist. I hardly know a catch tank that was ever made that didn't need modifying in some way or another in order to keep the oil where it is suppose to be.
I am REALLY not trying to be a smart ass but most all the crank breather photos I see are like yours in that they have just been installed and don't have enough miles on them to see how they work.
I think I would go for a larger one so I wouldn't have to be emptying it as often.
Good luck and I hope you now know why I advise people to watch them. They very well can oil your tire! Especially at high speeds!
That's a nice setup, Scott. Of course, a breather tank is a better solution to the crankcase ventilation problem, than just a filter. Yours looks very sanitary.
My gold bike doesn't get ridden enough, that's true. It is just one in a garage-full of rides. When I use it, I don't have an oiling problem.
Maybe I can get some fresh photos of it this spring, showing the latest changes. I posted these because they were relevant to the topic.
This is a picture of a Luftmeister block off plate that was on eBay:
A friend of mine had a couple of these made at a machine shop out of 3/16" aluminum to use as a starting point for a block off plate:
My point was partially the air filters/velocity stacks. Not a good thing in bad weather. But if you only ride it in good weather, then those would be fine to a point. They really don't stop much in the way of dirt/dust/water from getting into the carbs.
As to the blocking off and breather setup. The setup setup shown is a somewhat elegant way of cleaning up the look, but I do not see any other advantage to it. Looks pretty, but I seriously doubt it will make the crankcase breath any better. Plus you do run the risk of any oil coming out to end up on your rear tire. If you engine does not push any oil out, then it is not an issue.
I think the whole thing is more a styling issue than anything else. Make it look like you want it to look and not the way others think it should look.