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Oil consumption / common oil leaks?
Posted: Mon Feb 23, 2015 5:04 pm
by spiderwheels
Good evening all,
I think my bike is using too much oil. How much is 'normal'?
It may be I have an oil leak as there is oil around the engine, though I haven't looked closely on where it might be coming from.
Plenty of it appears to end up in the airbox too as this is always rather oily.
Posted: Mon Feb 23, 2015 5:29 pm
by squadron Nero
Is it possible you're over filling it, it's then spitting out of the air box and then dribbling down onto the engine?
Posted: Mon Feb 23, 2015 5:45 pm
by Aladinsaneuk
Agree it's over filled
Bet the oil is appearing on the left hand side just in front of the gear change
With respect - you have read here about how to check the oil level?
Posted: Mon Feb 23, 2015 6:56 pm
by spiderwheels
I believe I'm checking it correctly as per the instructions.
I know I probably over filled it last oil change which would account for the oil in the airbox but not for the fact that it is not longer appearing in the site tube
Posted: Mon Feb 23, 2015 7:20 pm
by Aladinsaneuk
it will not appear / be reliable untill the engine is running, at a good temp and not on the sidestand.....
if in doubt, drop the oil out and replace
measure the volume you discard
Posted: Mon Feb 23, 2015 7:41 pm
by fatboy
Every time I top up or replace oil it seems to take forever to register in the level pipe and I always end up overfilling despite switching off and leaving it for a few mins
There does not seem to be 'normal' with falco's
Posted: Tue Feb 24, 2015 5:44 am
by blinkey501
Just be aware, overfilling the oil tank will blow oil up the breather tube from the crank into the air box.
It can also blow oil down your throttle bodies and foul your spark plugs?

Posted: Tue Feb 24, 2015 7:41 am
by Firestarter
I've replaced the stator cover gasket (wasn't that) and am currently awaiting a replacement hydraulic camchain adjuster plug (which is the source of the leak, or rather the copper washer underneath). But this is unlikely to be your source. Best thing would be to clean it all up, drop the oil and put a known quantity in, and see what happens
Posted: Tue Feb 24, 2015 8:28 am
by Tonyunn
More of a general thing but I had a constant wet side stand etc. and thought it might be the gear shat or something like that.
At the end of last year I swapped the plastic oil tank cap for an alloy one and lo and behold the area dried up, I think it was weeping past the threads under load\pressure and now it doesn't.
Posted: Tue Feb 24, 2015 10:17 am
by mangocrazy
Firestarter wrote:I've replaced the stator cover gasket (wasn't that) and am currently awaiting a replacement hydraulic camchain adjuster plug (which is the source of the leak, or rather the copper washer underneath). But this is unlikely to be your source. Best thing would be to clean it all up, drop the oil and put a known quantity in, and see what happens
I bought a pack of 10 aluminium crush washers for a fiver off ebay:
http://www.ebay.co.uk/itm/271142115129? ... 0137890459
The size I got were M16 x 22 x 1.3 and fitted perfectly. What surprised me was the rather low clamping force required for an M16 plug - only 20 Nm (14.5 lb/ft) torque. It took at least five times that amount of force to remove the tw@t...
Posted: Tue Feb 24, 2015 1:04 pm
by Firestarter
mangocrazy wrote:Firestarter wrote:I've replaced the stator cover gasket (wasn't that) and am currently awaiting a replacement hydraulic camchain adjuster plug (which is the source of the leak, or rather the copper washer underneath). But this is unlikely to be your source. Best thing would be to clean it all up, drop the oil and put a known quantity in, and see what happens
I bought a pack of 10 aluminium crush washers for a fiver off ebay:
http://www.ebay.co.uk/itm/271142115129? ... 0137890459
The size I got were M16 x 22 x 1.3 and fitted perfectly. What surprised me was the rather low clamping force required for an M16 plug - only 20 Nm (14.5 lb/ft) torque. It took at least five times that amount of force to remove the tw@t...
Hmmm... won't hijack too much, but think I might do the same - I've re-annealed the washer, but the plug is taking a long time to order up (nearly at 4 weeks!), so any urgency has gone. Think an order for some washers will be going in...
Posted: Tue Feb 24, 2015 1:36 pm
by spiderwheels
It's up on the Abba stand but I thought I'd do a check anyway. Ran it for 15 minutes. There was no oil visible in the sight tube while idling and when I switched it off it came up to the Min mark. This is only 800 miles since I thought I'd topped it up to max (or overfilled it..)
Posted: Tue Feb 24, 2015 2:04 pm
by D-Rider
Is there a possibility that rather than being no oil in the sight tube, that it's completely full and you just can't see a level?
Clutching at a bit of a straw here but with suspicion of over-filling, it might be a possibility.
Posted: Tue Feb 24, 2015 2:55 pm
by spiderwheels
D-Rider wrote:Is there a possibility that rather than being no oil in the sight tube, that it's completely full and you just can't see a level?
Clutching at a bit of a straw here but with suspicion of over-filling, it might be a possibility.
I considered that while it was running but unfortunately not. It's quite clear what it's supposed to look like when the level comes back up to Min after stopping the engine.
Posted: Tue Feb 24, 2015 3:56 pm
by Firestarter
If you've got a confirmed level (albeit low), I'd put 200-300ml in, warm it up and see what happens to the level. Careful on the Abba stand, it raises the back end and might skew the level, I would leave it warming for 15-20 minutes on the side stand, stand it upright and turn off the engine - IIRC this is the correct level check process.