Motorcycle Chain

Not sure on your chain size? Hopefully this may help >>>

Chain Pitch

Chain pitch relates to the both distance between the centre of each roller pin [the first number on the pitch i.e the 5 in 525] and the width of the roller internally between the plates gives the send part of the chain pitch [i.e the 5 in 525] this is NOT the roller diameter.

It’s crucial to fit the correct pitch size chain and matching sprockets to save any damage or inconvenience!

Here’s some tips that may help?:

  • The chain pitch is often stamped on the side plates of the chain – clean the chain and see if you can spot the number – e.g. 525 etc
  • If it’s not on the chain it may be on the sprockets, check the sprocket part numbers stamped/etched onto them as see if the part number include the chain size e.g. 477U-525-45-HA = 525

If none of this helps hopefully these dimension charts may help guide:

Metric Dimensions

ChainPitchWidthRoller Diameter
41512.70mm4.88mm7.75mm
42012.70mm6.35mm7.75mm
42812.70mm7.75mm8.51mm
52015.88mm6.35mm10.16mm
52515.88mm7.85mm10.16mm
53015.88mm9.53mm10.16mm
53215.88mm9.53mm11.10mm
63019.05mm9.53mm11.91mm
63219.05mm9.66mm12.68mm

Classic Chain Sizes and Modern Equivalents

Classic SizeEquivalent
1/2 x 3/16 InchModern 415
1/2 x 1/4 InchModern 420
1/2 x 5/16 InchModern 428
5/8 x 1/4 InchModern 520
5/8 x 5/16 InchModern 530
5/8 x 3/8 InchModern 530
3/4 x 3/8 InchModern 630

Chain Length

Chain length is most commonly stated in number of links or pins, as complete chain links have x2 pins the number is always even i.e. 100 – 102 – 104 etc.

Simply count the number of pins you have on your chain = the length.

Or if you count the number of side plates on the chain and times by 2 i.e 50 plates = 100 pins = 100 link chain.

If none of this gives you certainty check with a qualified mechanic! ?

We have a full range of Motorcycle Chains - Chain and Sprocket Kits or all Motorcycle Chain and Sprockets parts online