I don't think so but am unsure if there are any mods you could do yourself to increase oil output. If there is I'd like to know about it
What do you class as big bars? I have had 3 Makita/Dolmar 6400-7900's and all have failed to put out enough oil to sufficiently lubricate a bar over 32". In fact in dead hardwood where bars really get a good workout (and get very very hot) they are marginal even on a 32" bar. Even the Chinese Husky 365 copies I've got will pump out way more oil than a 7900 as long as the oiler is maxed out.
To be honest though if you need to run a bar over 32" the 7900 series is probably not the saw you should have been buying anyway.
Another thing too, the Dolmar 9010 or your Solo 694 is not the same oiler setup as the 6400-7900 model Dolmar/Makitas and the fuel tank to oil use ratio is not a good indicator of how much oil a saw puts out. The 9010/694 are meant to run long bars and are tough saws.
Matt,
I've seen enough of your vids to know that you cut green verticle poles of concrete, not trees. Around these parts Hickory gives us a tough time. You would giggle at Hickory. That Red Gum crap you guys cut up should be measured in Nuclear Half-life and not years or rings. The stuff that gets big enough for a 36" bar around here is poplar and oak, the Dolkita oilers are fine for that stuff if green and 32" er so. Sometimes we forget how much "hard"wood varies from region to region.
I'm thinkin you and your mates might wanna fix the makita oiler problem and get rich selling it to us silly yanks !!!!