#81 Dave Lindsay has a 440 or 450 KFX. He is the only other big racer, top ten or so, other then Eichner riding green on the GH circuit. They own a business called Lindsay Machine. They have been boring and porting for 30yrs. It's a local shop here in Sandy, Utah. Steve Lindsay (owner) says their 450 kits revs more or quicker, can't remember, then the Yoshi kit.. Now they don't make a 450 kit, but they do modify somebodys to their likings. Dave is also a bigger then average joe so his weight will hinder him on the starts.. Everybody will be running cams, carbs, porting, 450cc, this and that, and the best rider will win the race..