Hello again,
I've been asking around the local trials lads and it does seem that most TY175 bikes here in England (well, here in Yorkshire, anyway!) do start with the 525 prefix. Scott - it must have been a bit of a disappointment if you thought you were buying a 175 to find out that it had the 125 barrel fitted. I actually wanted a TY125 as it's for my young son and I didn't want anything too powerful - I would have gone for a TY80 but he's tall for his age and I thought he'd outgrow the 80 much too quickly. I didn't know when I bought the bike whether it was the TY175 or the TY125 as they look identical and (as you know to your cost!) most parts are completely interchangeable. I was chuffed to discover it is in fact the TY125. They seem to have been a lot more popular elsewhere in Europe than they ever were in England, so finding it was the genuine 125 was a bit of a surprise.
I'd love to hear from anyone else who has a TY125; especially anyone who rode one as a kid, or who has a child who competes on one. What are your experiences of the bike - any sensible mods to make etc.
Thanks! Eddie.