What is pit bike chain size? Average pit bike chain size

Generally, most of the pit bike uses 420 pitch chain. The size of the motorcycle chain is described in Pitch by length. A pitch is the small part of the chain that links with one another and forms a big chain.

Chain Pitch is modelled by different number digits. Some common pitches come like this.

pit bike chain size

How can you find your pit bike chain pitch?

You can find your chain pitch from its rated measurement. You should measure the pitch size, width, and diameter.




Roller Diameter


12.70 mm

4.88 mm

7.75 mm


12.70 mm

6.35 mm

7.75 mm


12.70 mm

7.75 mm

8.51 mm


15.88 mm

6.35 mm

10.16 mm


15.88 mm

7.85 mm

10.16 mm


15.88 mm

9.53 mm

10.16 mm


15.88 mm

9.53 mm

11.10 mm


19.05 mm

9.53 mm

11.91 mm


19.05 mm

9.66 mm

12.68 mm

It's actually a common issue we get after a customer usually new to pit biking attempts to install their new pit bike chain and finds that it doesn't fit. So, we're here to discuss the notion that the wrong size was ordered because all chain manufacturers provide more links than necessary (usually 120 links).

The length of a chain is defined by links of pitches. A replacement spare chain is normally longer than you need. They send it bigger than required so that you don't face a shortage. And big chain can be chopped into the size your bike need. There are some default sizes the manufacturers provide on an individual purchase.

520 pitch chains are provided as 124 links long. So the chain is determined as 520-124. And the consumer needs from 114 to 124 depending on the length they need to cover.

What is the difference between standard, heavy, o-ring, and x-ring?

The standard is a regular chain. We only sell these for smaller road bikes e.g GN125, Varadero 125s, CB250, etc. Heavy Duty is the most popular for midsized bikes on the road. Also, most MX bikes can run an HD chain. O-ring is what almost every road bike over 400cc takes. It's also used on some MX bikes, especially for enduro use. They hold lube better than HD chains. X-ring is like a good o-ring. An x-ring chain can hold lube for long due to the shape of the rubber rings.

What do I need to install my chain?

So, when buying a new chain it is important that you should buy a chain breaker too. The chain breaker should be every rider's tool in their garage and should be just a one-time expense. The most common style is this Bike master, which also comes with a replacement tip - because those do break over time but don't cost nearly as much as a brand new breaker.

Then acquiring a press and rivet tool is necessary. If you're crafty with pliers you can probably get away with using a standard set at home but the press and rivet tool (only for rivet style links) makes it so much easier. But if you like blowing up, and throwing things across the garage then by all means use some pliers. Seriously, the press clamps your newly broken chain back together in a snap. This Motion Pro is an all-in-one breaker, press and rivet tool.

How to install my chain?

If anyone tells you to size the new chain alongside the old chain ignore this advice and find new friends if that's who is telling you. The old chain is stretched out and likely reached the furthest adjustment point using the axle blocks at this stage. Plus if you're changing sprocket sizes you risk cutting the chain too short before ever getting it on the bike.

Before cutting to size, move the chain adjusters i.e axle blocks in so you have space to adjust the chain as it stretches over time now you know why not to size the new chain against the old chain. We suggest you to move the axle blocks near the centre rather than all the way forward so you have some leeway if the chain is cut a bit short.

Now, route the new chain through the rollers, slides, guides, and new sprockets and bring both ends together at the rear sprocket. Figure out how many links to cut and mark it.

Mechanic's Note: Both ends of the chain are inner links (female to female). Break the chain leaving the inner links exposed because the master link is an outer link.

Once cut, install the chain which should now sit on the rear sprocket end-to-end. Because you centred the axle blocks you have some wiggle room either way but it shouldn't be much. If it makes sense, cut another link out otherwise install the master link and if your chain comes with an O-ring install that as too. You'll find the chain press very beneficial at this stage otherwise use a pair of channel lock pliers.

Once the master link is attached, adjust the chain to specs. Read pit Bike Chain Tension - Changing and adjusting for more information.

How often should I lube my pit bike chain?

You should lube your pit bike chain riding every 300 to 500 miles. By the period of time, it's actually 4 to 7 days. For off-road riding, you should check if it needs lubricant every time you go for a ride. You should also lube your bike chain every time you do a power wash. Because a power wash cleanses the lubes from the chain.

There are some situations when you need to consider re-lube your chain. If the chain encounters heavy sand or soil, the lube gets polluted and then doesn't work as it should do. In such a situation, you have to cleanse the chain with fresh water and let it dry and then lube again.

How do I know if I need to change my chain?

If your pit bike chain is out of adjustment is a general rule that you need to change your chain.

Also, if you can pull your chain off the rear sprocket and there's a gap it's time to change.

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