86 tecate crank seal ques

[Tbcoplin]

Do I have to split the casing to change the crank seals on my 86 ttecate b1?

[sblt500r]

yes you have to. you also have to press the main bearings out. so you might as well change those 2.

[Tbcoplin]

If the crank seal is sucking air, will that cause the motor not to crank? Or if it does crank, will it cause it to be too lean and destroy my top end?