I finally had a chance to ride my 426 after installing the Hinson basket. Previous to this, the clutch was lurchy, grabby and noisy, so I decided to install the Hinson basket, which has slots cut into the tangs to scoop oil into the plates. I was more than a little skeptical about this, because it seems that Yamaha could have come up with something this simple. The next thing we'll hear is that Honda has the Japanese patent on making a decent clutch. I changed only the basket (nothing else) and after hammering it Saturday morning, the clutch still performed perfectly. This is not an endorsement for Hinson, because any other aftermarket basket may work as well or better. There is an article in the most recent issue of MXA (the magazine we love to hate), that outlines installing a Hinson basket on a YZ250. There are some differences for the 426 basket, and some issues are not covered in the documentation, so I'll explain below: 1. The MXA article shows drilling the rivets from the backing plate side of the clutch. This is a "no no" - the backing plate must be re-used, so the rivets should be drilled from the basket side. The proper drill size looks to be 5/16", but I only had ¼", so I drilled into the rivet about ¼" down, and then drilled at an angle for 360 degrees around to undercut the rivet flange. Eventually the rivet flange will pop off, and the rivet will push out easily (there are three rivets) 2. Whereas the YZ250 will have eight countersunk allen screws, the 426 will only have three, roundhead Allen screws holding the backing plate to the basket. Others have posted that the screw heads will hit the oil pump gear if not ground down (Hinson gives no warning of this). I ground a little off the screw heads, installed the basket and hub, kicked it over few times and then removed everything. When I looked at the oil pump gear, I could see that the screw heads had been scraping against the gear. I colored the face of the gear with a felt marker, went through the procedure again to verify the interference. I could have done myself a favor and ground down the screw heads so they didn't protrude more than anything else on the backing plate, right from the start. Don't even think about not using Red Loctite, because these three screws are all that separate you from nirvana and oblivion. 3. When installing the basket and gear back on the shaft, you may have to push it in and out about 15 or 20 times before the gears mesh so it slips on all the way. Patience is required here (of which I have little). Hinson deserves some credit for building a basket that works, but also deserves to be slapped for not informing the customer about the interference problem. Maybe another brand would be a better choice.