We here at Scooterlounge are nerds. We freely admit it. And one thing nerds do is get overly excited about very odd things. For example, we go totally weak in the knees when we see pristine NOS parts that are very seldom for sale... just like the carburetor above. It is for sale right now on Ebay with a buy it now of $475. Ouch! That is certainly a lot of money, but these carbs for GS's are pretty hard to find even in used condition, and we have to say that we've never ever seen an NOS one. I doubt we'll see another NOS one for sale any time soon.
More nerding out, below the jump
This carb is a Del'Orto UB23 S3. All the GS 150's had UB23 carbs, but there were several different versions. This would be for a GS 150 VS4 or VS5. The UB23 S3 had two different versions itself. The S3 and the S3-I, the only way to tell the difference is that the S3-I had the letter "I" stamped to the body. The S3 was used on the VS4 beggining with frame number 45976 and then subsequently on the VS5. The S3-I was used on the VS5 beginning with frame number 70120, when the top end on the GS was changed. It is unclear from the text or the photos in the auction whether this is a S3 or S3-I carb. Either way, it is rare rare rare.
