Scooterotica

Anyone else found the listings for chain pitch and sprockets in manuals wrong? I have 15/48 sprockets and the info is 81 pitch chain.This doesnt fit too short by quite a bit.An 82 pitch chain is way too long.Who'd have thought 1 link would make such a difference? Anyone have similar trouble? This isnt the first time its happened.

15/46 =80
15/47 = stretched 80
15/48 should be an 81

What make of chain? Could be you have one that is slightly out of spec? I've found these numbers have always worked out for my builds.

Got iwis chain the 81 is too short rear sprocket is about 4mm off centre no way getting clutch spider in

Where did you get it from?

There are, I believe, two types of Iwis chain and there are also fakes out there.

my monies on the sprocket(s). If they are poorly manufactured they will throw out the spacings by a big amount.

Chris

Got the chain from camlam ,and the rear sprocket is a camlam 6 plate,SIL front sprocket.

You need to measure the distance between the looped ends and get somebody else to measure a known good one.

The silver iwis is what you need the black type are industrial chains thesilver automotive

They're the silver chains.


81 and 82 link chains for comparison,not a lot in it.



81 link chain too short



82 link chain seems a lot of difference for 1 link extra

Personally, I would think that non-standard rear sprocket is the issue.