Quick question on buying jets.
For the BS carbs it looks like there are 2 different main jet sizes. There is a "large" with an 8mm diameter head and a "small" with a 6mm diameter head. Other than that, dimensions are the same with both (9mm length, 4.9mm thread diameter, 5.0x0.7 thread pitch). Jetsrus has the 600 carbs listed as using the small size, and the 750 using the large size. I measured the 120s that were in my old set of carbs and they are the large size. They fit fine, doesn't look like the jet holder was modified either. I'm not sure what head diameter the 112.5s in the set on the bike are, but I'm pretty sure I remember swapping the 120s onto that set to check if they'd fit and they did... can't remember for sure though.
Anyways, just wondering if it really matters which head size I end up using, provided both will fit in the carbs. I can get a set of four 115s in the large size from bikebandit for $12.95 (instead of $6.39 each through jetsrus) and a set of four 117.5s in the small size from bikebandit for $11.95 (instead of $6.39 each). I assume the head diameter won't make any difference on how the jet itself performs but I figured I'd check real quick.