No, that would have made too much sense. LOL!!! This is basically an experiment anyway.
The gearing on this thing was a mess. When I got it, it was 12-39...though I never noticed the 12 on there. So I got a 38, and that helped, and it stayed that way awhile. Then I noticed the 12, and swapped it to a 13. Then I got the engine re-done with a ported cylinder and alot more power, so I went to a 14. But then the chain was too tight, so I went back to the 13 and started my search for a 37. I didn't want aluminum cause they wear out so damn fast and are tripple the money.
2Rs, I run 18s for MX and 20s for off road stuff like WORCS. I've got the 18s on there now, but I'll be running the 20s on Sunday for a GP race.
BLACKeR, I thought about just getting a new chain, but there's just nothing wrong with the one I have. I have no doubt I have enough motor to pull the 14/37, I just need to see how I like it on the track, since that's mostly what I do. Yeah, 12/39 made 1st & 2nd pretty much worthless. I think I rode it once like that and then put a 38 on there. Even then, I almost never used 1st still.