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There really isn't one... 50 Series chain is a 5/8" pitch with a .400" dia roller that is 3/8" wide. I directly equates to a motorcycle 530 chain in size. 520 - 5/8" pitch .400 dia roller 1/4" width. 525 - 5/8" pitch .400 dia roller 5/16" width. 530 - 5/8" pitch .400 dia roller 3/8" width.
630 is wider
520
530
-- Any odd number between 520 and 530 must start with "5 2",so that's 7 out of the sum of 12 right there. How much is left ?-- (12 - 7) = 5 . So the missing digit is 5 .-- The number is 525 .Check:-- 525 is odd.-- 525 is between 520 and 530.-- (5 + 2 + 5) = 12 .Yep. It works.QED, man, QED !
The phone number of the Vikingsholm Mansion is: 530-525-3345.
The chain size is 530. it was an O-ring from the factory.
The 530-2 had additional embroidery designs and most importantly it added the blind stitch which the 530 did not have.
IT'S A 530
I have a 07 KTM 525 XCW and the manual call for 6mm on plug gap.
No. 5.25 = 525/100 5.3 = 53/10 = 530/100 ⇒ 5.25 < 5.3
the size of chain on the 1981 kz650 is a 530 or 630 chain. that is a pretty good chain in my opinion because it is very strong and it is pretty thick.