Service your Diamond Drive!
Recommended service is crucial at first 500 miles. I did mine yesterday and the oil that came out was filled with metal. As the gears break in on each other lots of meterial wears off. Very important that you drain/fill, run it a mile or two, then drain/fill again @ first 500 miles. My 011 800 F used about 15 oz's X2 to fill, flush and fill. Easy to do. Remove secondary clutch (one bolt) Drain DD. Tip sled on its R side. Fill to line level. Re-install clutch...run a mile or two. Repeat. Cost me about $25 for cat DD oil. I will do again @ 1500 miles.