Correct chain slack prevents premature wear on the chain, sprockets and gearbox output bearing. Correct chain slack on the Royal Enfield Meteor 350 is 25-30 of vertical movement, measured at the tightest point of the chain.
Check slack with the bike on its side stand, at the midpoint between the sprockets. Push the chain up and down, and measure the total movement.
Royal Enfield Meteor 350 quick service specs
| Item | Specification |
|---|---|
| Engine oil | 15W-50 (API SL, JASO MA2, semi-synthetic) |
| Oil capacity | 2.2 L |
| Oil change interval | 6200 miles |
| Chain slack | 25-30 mm |
| Spark plug | Bosch YR7MES / Champion RER6YCA (gap 0.7-0.8 mm) |
| Tire pressure (F/R) | 32 / 32 PSI |
| Battery | 12V 8Ah VRLA |
How to adjust chain slack, step by step
- Check the current slack — measure at the tightest point: push the chain up and down at the midpoint between sprockets.
- Loosen the rear axle nut — just enough so the wheel can move in the swingarm.
- Turn the adjusters equally — a quarter turn at a time on each side, keeping the alignment marks equal.
- Recheck slack — measure again at the tightest point; repeat until it’s within 25-30 mm.
- Tighten the axle nut to torque — hold the adjusters in place while tightening.
- Check alignment — the marks on both sides of the swingarm must match; check the chain runs straight.
- Spin the wheel — it should spin freely with no tight spots or binding.
Common mistakes to avoid
- Adjusting on the side stand — always check slack with the bike upright or on a stand, as the manual specifies, for a consistent reading.
- Moving only one adjuster — adjusting one side only misaligns the wheel — turn both equally.
- Setting slack at a loose spot — chains have tight and loose spots — always measure at the tightest point.
- Over-tightening — too tight a chain wears the gearbox bearing and sprockets — keep it in the 25-30 mm range.
FAQ
What is the correct chain slack for a Royal Enfield Meteor 350?
25-30 mm of vertical movement, measured at the tightest point of the chain.
How do I find the tightest point?
Rotate the rear wheel slowly and check slack at several points — the tightest one is the one to set by.
How often should I check chain slack?
Every 500 miles, or after a long ride. A chain stretches fastest when new.
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Dan Heiman
Writer at Helmet Today, covering helmet reviews, fit and riding safety.
