I used these on my Mugen for more than 2 years & the work great and they are WAY lighter than stock. Less weight, less rotating mass, good stuff.

http://www.amainhobbies.com/product_...oducts_id/2408

Someone makes ones like this for the Losi, I just can't seem to remeber where I saw them.

http://www.amainhobbies.com/product_...ducts_id/12876

http://www.amainhobbies.com/product_...ducts_id/13085