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-   -   oil drain pipe from airbox ( https://www.xt660.com/showthread.php?t=8394)

coxwain 04-05-09 20:00

i polish my pipe all the time

tripletom 06-05-09 12:29

Quote:

Originally Posted by JMo (Post 92417)
Unless you go through a deep river? - when it could well act like a straw!

xxx

I'm no eco-weeny, but I do think that removing/replacing the bung is hardly a hardship. and would stop oil dripping out in-line with the rear tyre? - potentially a disaster, especially in the rain? - I agree with you the the primary reason is some silly Euro legislation - my XR/s vent to the open air, but the end of their tube is up under the seat, not barely 8 inches off the ground?

I was thinking about this this morning and what hardship could be caused by fitting a longer pipe and either running it ala brit twin along the rear subframe, or so it drops any waste oil onto the chain?

JMo 06-05-09 12:36

Quote:

Originally Posted by tripletom (Post 92658)
I was thinking about this this morning and what hardship could be caused by fitting a longer pipe and either running it ala brit twin along the rear subframe, or so it drops any waste oil onto the chain?

Hee hee - that isn't a bad idea (although I'm sure someone will say you shouldn't use old engine oil on your chain, but the correct wax etc etc) - if you were to do it, I'd suggest routing the oil tube into a canister/reservoir first, so you could regulate the flow a la Scottoiler...?

Of course in true Blue Peter stylee, I hope to see a 35mm film canister modded with silicon sealant and pin-pricks in a rubber membraine to regulate the flow...

Actually, on second thoughts - maybe just get a proper scottoiler reservoir and fit a nipple to accept the end of the hose from the airbox...

xxx

tripletom 06-05-09 13:09

I modified a chainoiler using some carb vent hose, some heatshrink and a stainless steel tig filler rod to knock up a very nice chain oiler ;)
I've just had a thought; the drain pipe is from the airbox, why does it fill with oil? Is there an engine breather that goes in there too? I need to look at this.
Why can't the engine breather vent to atmosphere? aRgh.

JMo 06-05-09 13:51

Quote:

Originally Posted by tripletom (Post 92667)
I modified a chainoiler using some carb vent hose, some heatshrink and a stainless steel tig filler rod to knock up a very nice chain oiler ;)

Hee hee - excellent to hear the Blue Peter spirit lives on!


Quote:

I've just had a thought; the drain pipe is from the airbox, why does it fill with oil? Is there an engine breather that goes in there too? I need to look at this. Why can't the engine breather vent to atmosphere? aRgh.
Yes, the crankcase vents into the airbox - they do this for 'eco' reasons, rather than venting into the atmosphere - presumably they don't want microscopic hydrocarbons (or whatever) loose in the air, and/or if the bike tipped over, oil potentially leaking out... seems a bit pointless when there is so much other pollution in the world, but every little helps I guess...

xxx

tripletom 06-05-09 14:03

Quote:

Originally Posted by JMo (Post 92672)
Yes, the crankcase vents into the airbox - they do this for 'eco' reasons, rather than venting into the atmosphere - presumably they don't want microscopic hydrocarbons (or whatever) loose in the air, and/or if the bike tipped over, oil potentially leaking out... seems a bit pointless when there is so much other pollution in the world, but every little helps I guess...

xxx

Well in that case it's simple, remove the crankcase to airbox pipe. Run a vent pipe from the crankcase with a breather filter on it and plug the airbox holes.
The crankcase breather on my Caponord used to dump oil through and mess up the rear injector. Bloody thing.
I shall get on with trying it out. Thanks for the info JMo. Can I interest you in a chain oiler? ;)

Piipz 17-05-09 01:38

ohh crap and I thought something is wrong with my engine. I had a longer trip (4400km) and noticed some oil is slowly dripping out of airbox. I looked closer, the cover is very tight but I still get some oil dripping through it. This never happened to me on normal riding days or on shorter trips. My problem is, I have a 2-in-1 exhaust system and it is difficult to access the pipe. And second problem is, when oil is dripping, it is dripping exactly on the exhaust, so guess if I was surprised when suddenly some smoke came out on my right side. Ok, i will try do detach the pipe and see if it is filled with oil :)

JMo 18-05-09 20:32

Quote:

Originally Posted by Piipz (Post 94337)
ohh crap and I thought something is wrong with my engine. I had a longer trip (4400km) and noticed some oil is slowly dripping out of airbox. I looked closer, the cover is very tight but I still get some oil dripping through it. This never happened to me on normal riding days or on shorter trips. My problem is, I have a 2-in-1 exhaust system and it is difficult to access the pipe. And second problem is, when oil is dripping, it is dripping exactly on the exhaust, so guess if I was surprised when suddenly some smoke came out on my right side. Ok, i will try do detach the pipe and see if it is filled with oil :)

I've found that if you let the clear overflow tube back up too much (ie. fill right up) then oil will start to collect in the airbox itself, maybe that is where/why it's leaking? Have you tried removing the bung and draining the tube?

xxx

Piipz 20-05-09 14:12

I will try that. damn 2in1 exhaust is on the way, i must have really small hands to do that. and some very long needlenose pliers :P

JMo 20-05-09 19:29

Quote:

Originally Posted by Piipz (Post 94958)
I will try that. damn 2in1 exhaust is on the way, i must have really small hands to do that. and some very long needlenose pliers :P

No need - there is a clear hose that exits under the bike (behind the bashplate) with a black bung in and a spring clip - you just slide the clip up the tube and pull out the bung, and the tube will empty itself all over your garage floor...

xxx


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