If the change is just going to be for looks or to modernise it- Don't bother. But if you have to buy a new stem to get the bike ridable- it makes sense.
OCR3----- Lowest of the low in this range. Certain downgrades made to compete at a price on the 3 and the biggest one was wheels. Changing the stock wheels to a handbuilt set of training wheels transformed My OCR3 for me into something that worked a lot better.
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How long was I in the army? Five foot seven.
Spike Milligan