Crank seal/Bearings

right ive found out the problem with my speedfight its the crank seal is gone or going so i am going to change that, can i change the crank seal without taking the engine out? or does the engine have to come out and the casings off ect...?

the bike is a 2005 speedfight 2 air cooled

thankyou brad

 

ye the engine needs to come out of the scooter and split cases in half

 

i dont think u do mate i dident on my aerox u just take the variator out then change that and wer the fan on the ova side is take all that off then thats that side done aswell only need to take casein off wen u change bearings