How to Change Engine Oil in Your Royal Enfield Std 350

General maintenance guide for changing engine oil and oil filter on a Royal Enfield STD 350 Bullet.

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How to Change Engine Oil in Your Royal Enfield Std 350
44 Steps
Supplies
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1
Remove the oil cap

Remove the oil cap

2
Check level and oil consistency

Check level and oil consistency

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3
If oil is too dark with lot of slug or when you pinch the oil, if it breaks without sticking you can choose to change oil or you can change oil every 2500Km

If oil is too dark with lot of slug or when you pinch the oil, if it breaks without sticking you can choose to change oil or you can change oil every 2500Km

4

Keep a tray under the engine to collect oil

5
Remove or loosen this nut ( oil feed plug )

Remove or loosen this nut ( oil feed plug )

6
Use a 21mm spanner and rotate anti clock wise

Use a 21mm spanner and rotate anti clock wise

7
You can decide to leave it loose instead of removing it

You can decide to leave it loose instead of removing it

8
I choose to remove and clean thoroughly

I choose to remove and clean thoroughly

9
Under the engine there will be two strainer plug bolts. 18mm spanner would be required

Under the engine there will be two strainer plug bolts. 18mm spanner would be required

10
Second strainer plug bolt

Second strainer plug bolt

11
This is the sump drain bolt, in post 70s engines, this is at the bottom of the engine located at the back.

This is the sump drain bolt, in post 70s engines, this is at the bottom of the engine located at the back.

12

Oil will start draining out as soon as you remove the sump drain bolts at the bottom or side.

13
Press the decompressor

Press the decompressor

14
And pump the kick start lever to get as much old oil out as you can

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

15
Remove the oil filter cap nut

Remove the oil filter cap nut

16
In some older models as mine the oil filter can have a through stud

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

17
Remove the entire filter assembly

Remove the entire filter assembly

18
Now you can see the old oil filter stuck on to the walls of the filter container

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

19
Use a screw driver or finger to pull it out

Use a screw driver or finger to pull it out

20
There comes the old dirty filter

There comes the old dirty filter

21
Pull it out

Pull it out

22
Some people decide to clean and reuse.

Some people decide to clean and reuse.

23

You can choose to take a tea break and leave the motorcycle as is now so all the oil drains out. 10 - 15 mins break would be sufficient

24

Clean engine surfaces and all other nuts bolts etc.

25
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 ). Immerse in new oil before installation.

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 ). Immerse in new oil before installation.

26
Push in the new oil filter. Easier and better to install after immersion in new oil.

Push in the new oil filter. Easier and better to install after immersion in new oil.

27
Push it through

Push it through

28
It should be seated like this. ( Recommended to dip the filter in oil before installation - not shown here )

It should be seated like this. ( Recommended to dip the filter in oil before installation - not shown here )

29
Close the cleaned feed bolt. While tightening bolts always try to use your hands to make all the threads seat in and only use spanner or tools to torque it. (DO NOT OVER TIGHTEN BOLTS)

Close the cleaned feed bolt. While tightening bolts always try to use your hands to make all the threads seat in and only use spanner or tools to torque it. (DO NOT OVER TIGHTEN BOLTS)

30
Tighten the bolt using a 21mm spanner and rotating clockwise.  (DO NOT OVER TIGHTEN BOLTS)

Tighten the bolt using a 21mm spanner and rotating clockwise. (DO NOT OVER TIGHTEN BOLTS)

31
Reassemble the oil filter assembly

Reassemble the oil filter assembly

32
Tighten with 16mm spanner rotating clockwise.  (DO NOT OVER TIGHTEN BOLTS)

Tighten with 16mm spanner rotating clockwise. (DO NOT OVER TIGHTEN BOLTS)

33
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.  (DO NOT OVER TIGHTEN BOLTS)

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. (DO NOT OVER TIGHTEN BOLTS)

34
Close the strainer plug bolts. 18mm spanner required. (A bit of warning while tightening bolts, please tighten fully with hand and then use only 1/4 to 1/2 turn with a spanner.)

Close the strainer plug bolts. 18mm spanner required. (A bit of warning while tightening bolts, please tighten fully with hand and then use only 1/4 to 1/2 turn with a spanner.)

35
Close the bottom strainer plug bolts. 18mm spanner again. (A bit of warning while tightening bolts, please tighten fully with hand and then use only 1/4 to 1/2 turn or until it resists with spanner.)

Close the bottom strainer plug bolts. 18mm spanner again. (A bit of warning while tightening bolts, please tighten fully with hand and then use only 1/4 to 1/2 turn or until it resists with spanner.)

36
Cleaned and tightened bottom strainer bolt. (A bit of warning while tightening bolts, please tighten fully with hand and then use only 1/4 to 1/2 turn or until it resists with a spanner.)

Cleaned and tightened bottom strainer bolt. (A bit of warning while tightening bolts, please tighten fully with hand and then use only 1/4 to 1/2 turn or until it resists with a spanner.)

37

Now we are ready to pour new oil

38
Use any brand SAE 20W50 oil approx 1.5 Litres

Use any brand SAE 20W50 oil approx 1.5 Litres

39
Use a funnel for avoiding spillage and easy fluid flow into the engine

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

40
Pour in slowly

Pour in slowly

41
Clean dip stick and then dip until cap sits tight.

Clean dip stick and then dip until cap sits tight.

42
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.

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.

43
Close lid and tighten

Close lid and tighten

44

Check all nuts and bolts for tightness. In this case you do not need to go for a test drive. But if you wish to, wear a helmet. No matter how small the spin is.

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