Remove the oil cap

Check level and oil consistency

If oil is too dark with lot of slug you can choose to change oil or you can change oil every 2500Km

Remove or loosen this nut ( oil feed plug )

Use a 21mm spanner and rotate anti clock wise

You can decide to leave it loose instead of removing it

I choose to remove and clean thoroughly

Under the engine there will be two strainer plug bolts. In some older models this could be on the right side. 18mm spanner would be required

Second strainer plug bolt

In my case the second strainer is on the right side

Press the decompressor

And pump the kick start lever to get as much as old oil out as you can

Remove the oil filter cap nut

In some older models as mine the oil filter can have a through stud

Remove the entire filter assembly

Now you can see the old oil filter stuck on to the walls of the filter container

Use a screw driver or finger to pull it out

There comes the old dirty filter

Pull it out

Some people decide to clean and reuse.

I go for a new oil filter, it is only 21 INR ~ 0.38 USD. ( But I like some people's thought on recycling stuff )

Push in the new oil filter

Push it through

It should be seated like this

Close the removed, cleaned bolt

Tighten the bolt using a 21mm spanner and rotating clockwise

Reassemble the oil filter assembly

Tighten with 16mm spanner rotating clockwise

Close the strainer plug bolts. 18mm spanner required

This is an old model motorcycle which has a nut at the backend of the oil filter assembly tighten that as well if you have this

Close the bottom strainer plug bolts. 18mm spanner again

Cleaned and tightened bottom strainer bolt

Use any brand SAE 20W50 oil approx 1.5 Litres

Use a funnel for avoiding spillage and easy fluid flow into the engine

Pour in slowly

Clean dip stick and then dip until cap sits tight.

Remove and check oil level, top up if required. You should be within the HI ~ LO mark, in some newer motorcycles there is a knurled pattern on the dip stick. Level should not exceed pattern.

Close lid and tighten