Okay so I've got a really odd question... correct me if i'm wrong please... but isn't the Tranny in a honda 400ex or 450R or 450ER lubed by the engine oil? as is the clutch... I'm a motorcycle guy and I've never heard of a jap bike with a tranny or a seperate tranny fluid needed... I just read an ad for a 450ER which is a sport quad that the guy was bragging in the ad that he runs a decent 20w50 oil in the motor and 80w Gear oil in the tranny... so I'm trying to figure out where in the hell he's putting gear oil in a quad? I'm guessing he's popping the crank case fill plug for the oil which i'm under the impression isn't used on a honda for normal maintance like many other sport quads... and filling it with gear oil? please any thoughts on this subject i would appreciate... and if I'm wrong let me know cause I own a 400ex which could need the tranny fluid changed and so will several of my friends that have 400ex's.... I've also got a raptor and you have to add oil in the oil tank and crankcase for an oil change... but never heard of such a thing on the 400ex...