660 oil usage
 

Sorry to bother the Yam tech forum, as I'm on an Aprilia Pegaso, but consider it a nod of the hat, because I really do love the 660 engine.

I just wanted to to ask about oil usage. I've done about 25000 miles on my Peg in the last 4 years and I find long motorway miles, especially European motorways seem to really eat away at the oil. 600 miles at 130kph all day saw about 300ml of oil burn. on short runs and lower engine speeds oil usage tends to diminish.

Other friends with Pegs seem to never lose a drop of oil.

Now I'm not overly worried, some engines burn oil, others don't. There are advantages in both, but I was hoping to find out what the general consensus was on this engine?

Does yours burn oil?

I have 600 93mod and never refill between oilchanges, had one 89mod and same with Motul 10w-40 semisynth. Engine about 30-40k km. What is the mileage on this and what oil are you filling?

XT660r, 2007, 45000km.
Knocking wood, so far no consumption off oil. On motorways I am around 90-110 km/h. Mainly Elf, but have tried Motorex, Silkoline and Motul. Usually full synthetic, with few excursions off half synthetic. 10-40, 10-50 and 10-60.

I am generally using silkolene comp 4 10-40 which I understand is going a little over the top, but best to be careful than sorry!

Have a Tenere 660 and it burned a little oil at fast speeds and hot weather, but not much - thats up to 90 k kms.

Now past 100 k kms it burns a little more but I guess that is normal with that much on the clock.

My friends xtz660 uses some oil, even with a pretty fresh topend.

Just as you (and as normal) its the faster speeds tht does it, normal driving and its next to nothing.

oil burning might not be the culprit, it could be an engine breather issue

dont know how the engine breather is routed in a peg, likely to the airbox. after a spirited ride check if there are oily deposits in there

if you want to be more scientific, rig the vent temporarily to a plastic bottle and see if oil collects there. zip tie a plastic bottle to the frame and route the vent in there. simple. all my road racers have something like that....

and tell us what happened :)

:clap:Now that really is something I haven't considered. After a llong motorway thrash I have once noticed an oil film around the airbox. I'll look into the oil breather and let you know what I finnd.

Thanks for that:clap:

Yup, that combined with a bike thats easy to overfill with oil, and youre asking for trouble :)

+1 on jens, could be also the oil tank breather/overfilling... guess you know the procedure to checking oil level in XTs, right?

You could try changing your valve stem seals. They may be weeping oil.

If you're valves aren't leaking that maybe it's your cylinder. Glazed bore or worn rings.

It depends how far you want to look into it.


Has it got a lot of miles on it ?

100mm piston displaces a lot of air when it goes up/down , At higher rpm it can really push a lot of oil vapors out the breather . Even worse if a little compression gets by the rings .

About half a litre.
 

Both our 660's are on around 50k and always had only good quality semi synth. I like to change at 4000 and both bikes use about half a litre each in between.

Interesting to note the comments on the breather....I rerouted and repositioned ours right up under the tank....with a small k&N filter which does need cleaning out at oil changes. Great engine....shame the bike is so heavy though.

Oil doesn't evaporate. If you're losing it, its either being burned or its leaking. You get a bit of misting in a breather pipe but that's insignificant.

Well, we're on 46k kms, good oil used on prescribed oil changes +- 300 miles. I've done a few overfills onn the oil change, but the oil loss will go on beyond over filled and up to the need more oil mark.

So perhaps I am burning oil, as has been said, high constant revs really does burn it, whereas varied revs, local work seems to lose very little. I'd say I loose about 1litre every 6000 miles.

Haven't yet had a good look at the oil breather. I've located i, same shape as yam item, but it doesn't look too user servicable. Any tips?