and the maintenance schedule that i follow is:
1. oil change after 8-900 kms(oil filter after 2ooo kms )
2. lubricating the chain properly
3.nuts and bolts tight after 2000 kms approx
4.tunning after around 2500 to 3000 kms
rest changing the brake shoes or any thing like that, so i dont call it maintenance, it is necessary for every bike.