Topic: K&N Pods: What to do with Crankcase Vent and Vacuum lines?

[Zeke]

Hey you all:

I'm finally getting around to rejetting after my pipe swap.

My 80 650C has a large crankcase vent in the center valve cover and also a "vacuum" line which is connected to all 4 carbs.  These were connected to the air box.

Now that I'm using (trying) pods, what to do with these?

Should I just put some kind of breather filter on the CC vent?

Should the "vacuum" line be connected to my K&Ns or just plugged?

Thanks,

Zeke

[Bodi]

K&N, and other pod makers, have vent filters that are just a small "pod" with a nipple on one end and a stud on the other, you attach it to the frame with the stud and put your vent pipe on the nipple. This keeps bugs from crawling into your engine at least, and collects the oil vapours as well. You tend to wash the filter to remove an excess oil The engine will rarely suck into that breather so just leaving it open (racing regulations always require a catch can to collect oil, and this is a GOOD idea for any open breather) is not a big problem.
The carb lines are to suck fuel vapour back into the engine - there's not much vapour anyway and the carb bowls are actually open to atmosphere via the overflow tubes. Don't worry about these tubes. I think before 77 or 78 they went to open air anyway, then pollution regulations made them go to the airbox.

[Zeke]

Tried to reply to this last night, and f'in DSL died as usual....

Thanks for the tips Bodi.  But, what should I do with the vapor line -- plug or leave open?

Got a few days to think -- the 2-1 filters that K&N sells for the 1980 650C don't fit -- they are only for the 81 with CV carbs.

So I'll be ordering some different pods, and I'll get a CC vent then.

Thanks!

Zeke

[Bodi]

I would leave the carb tubes open.

[seaweb11]

Here is what I did

[Zeke]

Thanks, guys!

Zeke