Joined: Dec 2004
Posts: 12,560
Likes: 799
From: Middle of da Mitten
Bikes: Trek 7500, RANS V-Rex, Optima Baron, Velokraft NoCom, M-5 Carbon Highracer, Bacchetta Quattro, Catrike Speed
I don't recognize the name, but it looks like a knock-off of a TW-Bents or similar cheap Chinese 'bent. The chain lines on them aren't always well-thought-out. What I'd do is drop the return chain. That'll have the effect of reducing your ability to turn sharply, but it will prevent problems from the crossed chains.
Dropping the chain is pretty simple. First, attach a ~4" long bit of chain tube to the power idler. On that bike, you *may* want to rig a bracket to drop the chain tube a bit so it's close to being in-line with the derailleur-to-chainring path. (It doesn't have to be exact, but the less deflection you have the more efficient it will be.) Next, zip-tie another short piece of chain tube to the fork, so that it'll slide up and down the fork. Now run the return side of the chain through both tubes instead of using any idlers. The chain will rub the wheel and turning sharply will be a problem; but your gears will all be usable and it should run more quietly.
My Baron uses a crossed chain. The return idlers are tucked in enough that between the tuck and the chain tube, the chains don't normally touch. The power idler is set in-line with the middle of the cassette.