Large #25 chain sprockets .. where to buy?

[LI-ghtcycle]

I am contemplating using a 15T on my motor and a 110T (if that is a nominal size) at the rear wheel of my single stage RH drive, and I could also use an 11T & 80T to accomplish the same thing, however, 15T seems to be the nominal size for a freewheel on the smaller sprockets, and I know from Amber Wolf that he has found as large as 144T sprockets from old exercise equipment, and I have found some extremely expensive equipment specific stuff, but nothing like a site that specializes in the larger sprockets.

Thanks!

P.S. I do have another question, which is easier on the freewheel, one on the drive (motor) sprocket, or on the wheel (driven) sprocket?

 

[gwhy!]

if you are going with such a huge sprocket on the rear then I would say a freewheel on the motor would be the best option.

 

[Miles]

SDP https://sdp-si.com/eStore/ have 110t and 120t #25 sprockets.

80t here: http://tncscooters.com/product.php?sku=103250

 

[LI-ghtcycle]

Great, thanks!

 

[LI-ghtcycle]

Hmmm I wonder if I can get the sprockets with a similar bolt pattern as the ones for scooters for a 4 bolt pattern to attach to a custom plate (sans freewheel) that I guess will be made from an old freewheel or large enough cog that will allow me to bolt right to the large sprocket? (trying to keep the custom stuff to a bare minimum)