Question?

Energy One
JR03CHOPPER

JR03CHOPPER

Well-Known Member
That is the...."This bike will self destruct if removed plug."

I couldn't resist. Honestly I am not sure. I would assume it is to drain the case. Anyone else?
 
BWG56

BWG56

Guru
drains the engine, not necessary though for draining all oil since it a sump type, thats why some use the Scavanger when they change oil
 
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SKOGDOG

SKOGDOG

One of the old ones.
Removing that plug will drain the sump. Cute little thing, ain't it?
In fact, I don't understand why many folks buy a sump collector for $50-60 when that plug will drain the oil from the sump....anyone clarify that issue for me?
 
Mr. Wright

Mr. Wright

Knows some things
Supporting Member
I figured it must be a drain plug, but nobody has ever talked about it. If it is a drain, why not use it instead of the Scavenger?
 
BWG56

BWG56

Guru
if you drain it from that plug when you fire the bike up it will be running for a little without oil until it gets pumped thru, I drain the oil tank and refill, then remove the oil filter and spark plugs and make a tin foil funnel and then turn the bike over until the oil starts to get cleaner before I put the new oil filter on. It just gets out more of the used oil out without running it dry, then refill the oil tank. Hope this helps
 
TapioK

TapioK

Well-Known Member
That is a scary plug! You touch it and you fuck the thread on engine case? Hell it even looks evil!


Tapio
 
Brew

Brew

Troop Supporter
Most don't pull it because it's too easy to screw the threads up. As stated earlier a few of us use a scavenger to get all the old oil out.
 
BBChopper

BBChopper

Supports 2 Disabled Vets
Troop Supporter
Dont even look at it! Destroy your photo and find something else to look at!:2thumbs:
 
SKOGDOG

SKOGDOG

One of the old ones.
My K9 sump collects oil that has been thru the engine--it is the beginning of the return side of the oil system. The BDM oil pump is actually two pumps. HPHV= high pressure/high volume.The supply side (hi pressure) and the return side (hi volume). The supply side pumps oil to lubricate the engine and the return side pumps collected oil from the sump thru the filter, the on to the reservoir.
You have to prime the oil pump itself if it is drained, but I'm not sure that holds true for the sump---On the supply side of the pump there is always 2+ quarts in the reservoir for the pump to send to the engine---then it drops into the sump. At any time the sump typically has several ounces of oil (3 or 4?), but it can hold more, up to a quart or so if for instance the check valve fails. An air pocket would seriously compromise oil pressure on the supply side because it relies on consistent positive pressure to lubricate... But I don't see how the supply side oil pressure would be compromised if the sump is empty.
But this is stuff I've figured out working and learning about my bike. and guys...if anyone knows this is a bad practice, please say so...and of course please tell me why. I have found using logic often gets me into expensive trouble----that's why this Forum is so valuable...
And of course as usual, TapioK comments on the dangers of screwing up threads on an engine case is exactly correct. And like Ker, I pull the plugs and crank the starter a bit to re-oil the system....
 
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Mr. Wright

Mr. Wright

Knows some things
Supporting Member
BWG56 said:
if you drain it from that plug when you fire the bike up it will be running for a little without oil until it gets pumped thru, I drain the oil tank and refill, then remove the oil filter and spark plugs and make a tin foil funnel and then turn the bike over until the oil starts to get cleaner before I put the new oil filter on. It just gets out more of the used oil out without running it dry, then refill the oil tank. Hope this helps
Click to expand...
That's what I do. And yes to everyone else, The more I thought about it, the more taking it out sounded like a real bad idea. I just noticed it because I had to raise the table more to get the air horn wires on. Thanks for the input.
Back to our regular scheduled program.: up:
 
francoblay1

francoblay1

The Spaniard
BWG56 said:
if you drain it from that plug when you fire the bike up it will be running for a little without oil until it gets pumped thru, I drain the oil tank and refill, then remove the oil filter and spark plugs and make a tin foil funnel and then turn the bike over until the oil starts to get cleaner before I put the new oil filter on. It just gets out more of the used oil out without running it dry, then refill the oil tank. Hope this helps
Click to expand...
Brew said:
Most don't pull it because it's too easy to screw the threads up. As stated earlier a few of us use a scavenger to get all the old oil out.
Click to expand...
:iagree: That´s it as I read a few years ago somewhere here in the Forum.

Also, no need to buy a scavenger.... cut a plastic bottle into a funnel (1 L Coke bottle works great) and you are in business. :up:

:cheers:
 
liferider

liferider

Looking forward to retirement
Messing with that plug is like screwing fat girls and riding Moped's, might seem like a good idea at the time but soon you will regret doing it!
 
mittens

mittens

Well-Known Member
Hmm I drained from that plug, and the tank. filled and started the bike up....

Maybe this time I will just drain the tank.
 
francoblay1

francoblay1

The Spaniard
mittens said:
Hmm I drained from that plug, and the tank. filled and started the bike up....

Maybe this time I will just drain the tank.
Click to expand...
Yup, run the engine at low rpms without the oil filter on and get rid of all old oil in the lines... you will see it when it comes out clean :2thumbs:

I just had "DeJaVu"... I remember getting in the shit for a comment like that b4!!! :rolleyes: Anyway.... that´s the way to do it! :2thumbs:

:cheers:
 
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