I'm refurbishing a friend's many-year-old Bianchi Avenue. It's my first time ever working with grip shifters. I can't for the life of me get the existing cable out. How do I remove it? There's a slot on the shifters where I can see the derailer cable head, but the design seems to be purposely made so as not to allow me to push the cable back out again.
The grip shifters I'm working on are labeled "Grip Shift tm" and "MRX100-71". It's not clear to me who the manufacturer is.
Any tips are much appreciated.
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