Posting for Silverstrom. Finally found it John, the Yamaha TZR500 Twin nicknamed the CrossBoxer
CNC Crankcases with YZ250 cylinders, 110hp @ 9500rpm. Engine weighs 39 kg and complete bike wet weighs 153kg. I have seen it in his TZR3xv but can't find the photo. This is an interesting site with some creative engine works going on in the past. Another is a 3 cylinder TZ500 using tz cylinders on a billet crankcase. Wolgang's Rainey bike also
http://www.zweitakte.de/modelle/Motoren ... 20500a.htm" onclick="window.open(this.href);return false;
Yamaha TZR500 Twin
Moderator: rztom
Yamaha TZR500 Twin
1985 RZ500
1986 RG500
1986 RG500 C
1992 RGV500 WW ATR
1992 RGV500 LS
1985 NS500 Spencer p
1989 TZR500 Biaggi p
1984 RZV500 Rainey p
1994 NSR250sp R
1983 NS250 p
1987 RG250 WW p
1983 RG250 p
1988 YSR50 p
1986 RG500
1986 RG500 C
1992 RGV500 WW ATR
1992 RGV500 LS
1985 NS500 Spencer p
1989 TZR500 Biaggi p
1984 RZV500 Rainey p
1994 NSR250sp R
1983 NS250 p
1987 RG250 WW p
1983 RG250 p
1988 YSR50 p
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Re: Yamaha TZR500 Twin
Brilliant piece of engineering Dan. Shows what enough money and skill can do.