Your engine uses a 6903 bearing in the rear which is $4.97 from RC Bearings

and it uses a R6-2RS in the front which is $3.97 from RC bearings

That is $9.94 plus shipping from RC Bearings
http://www.rc-bearings.com/catalog/a...b43f&x=11&y=10
http://www.rc-bearings.com/catalog/a...590112&x=8&y=4

both bearings from Boca Bearings come as a set #ENK-40 for $21.95 including shipping
http://www.bocabearings.com/main1.as...054&n=*ENK-040