I am posting this as a separate, new, properly labeled Topic. I found this by chance buried in another topic - Thanks Artic_Fox

"you are not alone on the JM 110 top gear issue.
If you decide to try gearing the front lower the best you will be able to do is a 13 tooth. I did a lot of research on this for my JM 110. What I ended up with is a 13 tooth front from the Honda TRX 90. You will also need the lock plate and go ahead and get the bolts also. Call you local Honda dealer and order the TRX90 13 tooth front.. most likely made by Sunstar for $19. Honda Front lock plate $1, and the two mounting bolts. Dont expect a huge improvement. With the new front and the upgraded 26mm carb, 3rd seems "almost" useable. ;-)

IMHO, prior to the front sprocket change, 1st gear was too high also."

JT Sprockets has this, it is a JTF273 and comes in 13, 14, 15 (Stock), 16 Teeth



I am still searching for replacement sprocket for the REAR of the JM 110 & 125; so if any of you have that info please post it - Thanks