Ceramic liner?

[Quan-Time]

Steve you're not thinking of 2 strokes and oil scraper rings are you ??

You can adjust the oil retainer ring, the wavey one, and manually adjust how much oil it wipes on the sleeve. Im not surprised the JE ones were done correctly. Im also not surprised that stock yammy ones are not. Quite possibly why some smoke (eat) more oil than others.

[dandywarhol]

Its not just the fact that its a ceramic liner on the 900 barrels, its the piston/cylinder clearances which are around 60% less because the bores and pistons expand at the same rate.

Less clearance = less slap= less wear

I still think the TDM/TRX engine burns oil cos they're run it too much and the bores glaze. That could be the reason IMO that only some engines use oil

The 900 does use a LITTLE oil (well, mine does) but that's not a bad thing - at least it's getting there! Maybe a half litre between oil changes.