oil pumps

[JOOLZ]

I am just asking for conformation on this one as I am having a hell of a time trying to bleed my system.
Is the outside pipe the oil return and the inner pipe goes from the oil tank to the engine. Been kicking the thing over for the last 2 days I took the pipes off and poured some oil into the pump and the oil disappears in the inner and pours out of the outer when kicked but still no flow to the oil filter or head pipe. Its really starting to annoy me now
The XBR has a very badly designed oil system

[CrazyFrog]

Joolz,

If you PM me your email address, I have a pdf of the SLR650 workshop manual which has an excellent oil flow schematic near the front. It's substantially the same engine, so should be very similar.

Cheers,

Pete.

[JOOLZ]

Thanks that could be very helpful. Never had this much trouble bleeding the bike before, it usually only takes about 15-20 minutes, now im starting to suspect somethings wrong with the XL600R oil pump but like I say when I put oil in the pump it seems to flow

[JOOLZ]

That is a very clear diagram of the oil system, Im starting to suspect a lot of the oiling and bleeding problems with RFVC engines is down to the check valve. Looks like I am going to have to redrain the oil and take off the clutch cover a have a closer look at whats going on

[CrazyFrog]

That is a very clear diagram of the oil system, Im starting to suspect a lot of the oiling and bleeding problems with RFVC engines is down to the check valve. Looks like I am going to have to redrain the oil and take off the clutch cover a have a closer look at whats going on

Bugger, for some reason I really, really hate draining oil I've just put in...

[Nell]

I had a similar problem a couple of years ago. I tried all the obvious checks including fitting a different oil pump but it turned out the gauze strainer in the oil tank was almost blocked with a black shellac like deposit. Why I don't know. Hope you find an easier answer before you get round to dismantling the tank.

[welland99]

I am just asking for conformation on this one as I am having a hell of a time trying to bleed my system.
Is the outside pipe the oil return and the inner pipe goes from the oil tank to the engine. Been kicking the thing over for the last 2 days I took the pipes off and poured some oil into the pump and the oil disappears in the inner and pours out of the outer when kicked but still no flow to the oil filter or head pipe. Its really starting to annoy me now
The XBR has a very badly designed oil system

Hi Joolz,
How do you know that it needs bleeding?  Isn't it supposed to bleed itself? 
Is there any difference between the scenarios of normal oil change, and new dry build? 

Would you really expect to see oil flowing when just kicking on the starter, or would it be necessary to turn it over on the starter? 

I have occasionally taken off the oil filler cap from the tank while the engine is running, and I am aware of an oil feed into the tankcoming from the right of the filler neck. 

This is the kind of bleeding that I referred to in my post recently in the thread about the non-return valve in the crankcase breather. 

[JOOLZ]

Welland99 The bleeding proplem on rfvc engines is to get the oil to flow up the pipe that lubricates the top end, usually you crack the bolt that holds the pipe to the head give it a couple of dozen kicks and the oil flows up the pipe, once its leaking out the top you nip up the bolt and that is job done.
However if you have a good search around the internet, there are stories of heads failing mysterousy going back to the mid 1980's it looks like thousands of bikes with the rfvc engines have died due to top end failure (try buying a head on ebay look at the lack of choice and the price of a replacment that give you a good idea)
The bleeding problem is worse if the system has been completely drained, rather than just a standard oil change
No the one way crankcase valve has no effect on bleeding the system, in fact I bleed my bike with one of the valve covers open which totally negates the effect of the valve anyway

[JOOLZ]

The oil pump is working now, and the problem as I suspected was the check valve.  I removed the driving gear and spun the pump with a drill, the check valve didnt open, I disassembled it, this consists of a cotter pin which holds an o ring, a spring and a piston with a rubber seal on the end. I found a tiny piece of roughness on the piston, not visable to the eye but you could just about feel it with your finger, I changed it for another check valve, reassembled it all topped off the oil and after a dozen or so kicks oil is now flowing to the head.
Now I can get on and finish up, this problem has delayed me for 2 weeks