Crankshaft: Yamaha YBR125 YBR 125 (2005-2018) - 18T Kawasaki KE100 If you're having spark issues

If you're having spark issues with your TTR90 then it's a no brainer to get an upgraded coil on the bike

To replace / upgrade OEM: 4FM-82310-00 and 4TV-82310-00

Top and bottom headstock bearings to fit:

The models are F

Kawasaki GTR1000 (ZG1000 A) (1986-1993)

Crankshaft: Yamaha YBR125 YBR 125 (2005-2018) - 18T Kawasaki KE100 If you're having spark issuesBrand new crankshaft to fit: Yamaha YBR 125 ED (2005 2006). Yamaha YBR 125 (2007 2018). Yamaha YBR 125 Custom (2008 2010). This crankshaft has been manufactured to replace the original on a Yamaha YBR125 for the years and models shown above. To replace OEM: 3D9 W1140 00. 18 Teeth version (Euro 2 models). See other listings for 17 Teeth (Euro 1 3 models).