Hi I hope someone out there can help me.... I purchased a 1987 Kawasaki kz305 ltd motorcycle. I found out that the tires are dry rotted and they need to be changed to pass inspection. My question is what sizes tires go on the bike? I found three different sizes available.

1) On the bike(old tires) the front tire is 100/90-19, and the rear tire is 5.00-16

2) The sticker on the bike itself says the front tire is 3.00-18, and the rear tire is120/90-16

3) And the owners manual for the bike says the front tire is 90/90-19, and the rear tire is 120/90-16

Could anyone please help me? I am totally lost! Thanks in advance.
Brian

 

Welcome to KF Doughboy

Congrats on the questioning since it seems you have the manual at the moment. Tire and ride geometry can be altered to fit the rider as in YOU!. So it is up to you to determine if dropping the front fits your suspension and riding technique.