Oil Topped up too much.

Originally Posted by tonybmw92

well i changed the oil and filter and it at the correct level just below fill (checked on level ground) and its still lumpy going up through the gears. feels like compression or blockage of some sort. Any ideas?

Silly question, but did you check with the engine at running temperature? At cold you shouldnt see any oil at all in the glass when bike is level. And also when you said the oil is black, it should be oil coloured, not black. I'd mebbe try a flush.

The oil is nice and golden colour as i changed the oil and the filter for new yesterday. i then ran the bike in idle for 6 or 7 mins then left it to settle and it was just below the full mark when i checked after letting it cool.

[yorkie_chris]

Originally Posted by Durbs

Silly question, but did you check with the engine at running temperature? At cold you shouldnt see any oil at all in the glass when bike is level. And also when you said the oil is black, it should be oil coloured, not black. I'd mebbe try a flush.

This comment worries me a lot.

Cold oil will still move around, and will still show in the sight glass, it's not 50w mineral oil in winter you know...

The Suzuki manual states that oil level should be checked with the engine at operating temperature. Tilting a cold bike off the sidestand to level it up and checking the oil level is not a good idea. Whether you see oil in the glass or not is irrevelent, in my bike, you dont if you do that, after running, it shows near max. After the oil has leveled up, fair enough you should see some.

[yorkie_chris]

So why is there a different amount of oil in there when warm? (expansion yadda yadda, but that's negligble on the sort of dT involved in this...)

Seeing oil in the glass is the only clue you get as to whether there's oil in the motor or not, what are you going to do on a rebuild... run it for 5 minutes only to discover that actually there was nothing in sump?

Originally Posted by yorkie_chris

So why is there a different amount of oil in there when warm? (expansion yadda yadda, but that's negligble on the sort of dT involved in this...)

Not expansion, combination of viscosity of oil (which alters at temperature) vs gravity vs bike being oriented on an angle away from the sight glass when at rest on the side stand.

As for a rebuild, you simply completely drain and add the volume of oil specified by the manufacturer for that engine.

[yorkie_chris]

Right then so why does the bike being hot affect gravity? Angle of sidestand makes no difference as oil is checked with bike upright. Viscosity is also fairly unimportant as it may take an extra half second to reach an equilibrium level cold, but it's still going to be the same level as when hot.

Originally Posted by yorkie_chris

Right then so why does the bike being hot affect gravity? Angle of sidestand makes no difference as oil is checked with bike upright. Viscosity is also fairly unimportant as it may take an extra half second to reach an equilibrium level cold, but it's still going to be the same level as when hot.

Have to say, i havent a ferkin clue, all i know is the marks on your sight glass are calibrated for a warm engine, not a cold one. If anything, it should read too high on a cold engine as everything is in the bottom end and not up the top. I'm just off out back now to experiment with my levels.

[yorkie_chris]

It says to check warm, not check when it's just been switched off and the oil is mostly not in the sump. That takes a bit of time to get back to bottom.

Right, for the record, i was talking b@lls. Just checked. Cold bike on stand - nothing in glass. Cold bike held upright for a few secs - site glass showing overfill, full to top. Just running bike to get up to temp now and i guess when warm it'll drop to max. Doh, guesss i've glanced at full glass before and as its full you dont see the meniscus line. My bad.