Finally had a chance to put my new Clarke tank on my ’06 YZ450. With all the talk about bigger tanks and making the stock tank bigger I figured I’d post some pics and feedback on the Clarke tank. I’ve had 2 Clarke tanks and 1 GYTR (Acerbis) tank, I’ve been happy with the Clarke tanks so far. This one seems like it’ll be fine, it bolted up with no problems and fits pretty good. I ordered a stock WR450 petcock so I didn’t have to loop the hose around and also I wanted to keep my stock tank intact. (I use the stock tank 90% of the time, I actually put a WR450 reserve petcock in it too.) I heard some things about the IMS tanks not fitting around the shrouds very well, this tank fits fine. It moves the tops of the shrouds out about a half an inch from the sides of the radiators, doesn’t seem to be a problem so far. Everything lined right up and clearances look fine. Since I’m picky about a light bike, I weighed the stock tank and the Clarke tank and was surprised to see the Clarke was actually about ½ pound lighter! (Without fuel, duh. With fuel it'll be about 6 pounds heavier than a full stock tank.) As you can see, I marked the tank every ½ gallon so I can tell exactly how much range I have left when I’m riding. That’s one of the nice things about clear aftermarket tanks, I wish you could actually tell how much fuel is in the stock black one! BTW, they originally had this tank listed as 2.8 gallons, but when I got it the paperwork said 2.6Gal. I measured over 2.8Gal into it when I was marking it so not sure why they called it a 2.6.