Engine Damage Page 1	The next two pages detail some information of the motor damage we incurred during the 98 race season and what caused the damage.
	The cause of most of my top end oiling problems. This foreign matter was spread over the oil pump suction screen, it appeared to be severely limiting oil flow. Jeez I could swear I cleaned the motor better than that, famous last words. I would recommend that builders run in their new motors some and then pull the clutch side cover and clean this screen. I forgot to take a photo of the top end oil restriction orifice, it's an orifice plug that is located next to the bottom right cylinder stud in the ride side of the crank case halves. It restricts oil flow from the pump outlet to the channel leading to the cylinder head. I have a strong feeling that this orifice should be enlarged to provide more oil to the cam bearings and lobes. Those of you running an oil cooler on this motor I can almost assure you that it is doing very little to cool the oil unless you enlarge this orifice. Don't go wild enlarging the orifice because the more oil you send to the top end the less is available for the bottom end bearings. In stock form the opening looks to be about .030". For the 99 season I will be running a Takegawa high output pump and I will probably open up this orifice to about .045. Check back later for the actual numbers and photos of the orifice.
	Drive side cam bearing surface in the cylinder head was trashed by lack of oil. Clearances in the tired old head I used was probably a factor also. Next year I will be using a brand new ported head. Maybe I'll even try needle bearing inserts for the camshaft.
	The destroyed Takegawa cam, another $100 down the drain. I was very happy with how the cam worked with the motor, while it was running that is. It is possible that the cam can be reused in a low speed application like a pit bike or backyard bike. Bearing surfaces have some scoring but because the mating surfaces in the head are aluminum the head got the worst of the damage. Cam got very hot, it changed in color from the normal silver of shiny metal to the blue/black color of heat treated metal. I guess if I went with needle bearings I could turn down the ends and use it again.