Big Bore Cylinder Barrel Kit: Yamaha QT50 QT 50 60cc (1979-1992) Yamaha XS1100 The coil pack replaces either

The coil pack replaces either 21121-1010 or 21121-1011

Yamaha XJ 600 (1984-1986)

Yamaha XT 225 (1993-1998)

It has 1 spade connector with 1 HT lead and spark plug cap

If you are having spark issues on your Yamaha FZR1000 then the ignition coils could be the culprit

Big Bore Cylinder Barrel Kit: Yamaha QT50 QT 50 60cc (1979-1992) Yamaha XS1100 The coil pack replaces eitherBrand New Top End Rebuild Kit to fit: Yamaha QT 50 (1979 1992). Upgrade your barrel from 50cc to 60cc with no modifications necessary from the standard QT50. This is the highest quality aftermarket Yamaha QT50 cylinder kit you can get on the market. The performance will meet that of the genuine part and you'll save yourself a bit of money too. Includes Cylinder, Gasket, Piston Kit, Cylinder Head, Spark Plug, Studs and Nuts as seen in picture to fit