Hi All, Don't know if you have seen this before but if your trying to identify your engine or frame then this seems the place to look,just type in your numbers or make and model and it tells you approx year of manufacture and the engine size, not a fully comprehensive list but pretty close and it can give you an idea about what your bike started out as. http://merrittmotorcyclesalvage.com/yamahaidentification.htm just follow the link and it's quite straight forward to get all the info your need. Ride safe.

Beware

thjose are usa codes not uk ones, there are some differences

Merv

Thanks Merv forgot to mention that DOH!