can admin move this to troubleshooting please

can anyone shed some light on what the hell is going on here.

b21e crank has a key

the gear has a slot and another cut out

someone's welded a key into the pully

I thought something was abit wrong here so went to swap on a pully from a b23.

the b23 crank is diffrent it just has a slot and the gear locks into that and the pully

what the hell is going on here haha

does b21 use a diffrent pully and the previous owner just did this to make it work?

I can't move the thread for some reason

Edit: but yes, there are a few different crank pulleys

    jamesinc

    I can't move the thread for some reason

    Edit: but yes, there are a few different crank pulleys

    guessing the previous owner didn't have the correct pully so just got the welder out hahaha

    it's worked this long so bugger it I'll just put it back together and run it

      My old B21 had the single straight keyway that fit the crank and the pulley.

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