Just bought and wondering what brand frame is? Has differential axle.

[Ron 1955]

Has 8 mounting bolts,

 

[Ron 1955]

I'm installing new cvt. New chain.

 

[Whitetrashrocker]

I'm installing new cvt. New chain.

What size chain?

Whats the sprocket attach to.

Your killing me smalls.
Give us some pics.

 

[panchothedog]

What size is the axle where the current hub sits? That 8 hole setup seems strange. Maybe you have to ability to enlarge the center a precisely drill the sprocket. If not you're looking at a machine shop. As suggested by WTR, if th axle diameter is a common size it might be easier and cheaper to get a new hub and matching sprocket.

 

[Ron 1955]

It has a differential axle and I want to keep it that way. I have a friend that can get the holes right for me. Going back with 420 chain, had 212 predator

 

[Functional Artist]

Maybe something like this?​

Has (2) different bolt patterns 2 3/16" & 2 7/8"
...& available in 48T, 54T & 60T versions

#41 / #420 Sprocket ($25.95)​

(48T, 54T, or 60T)
Steel | 2-13/16" & 2-7/8" Bolt Circle

Product Specs:

• Rear Axle Sprocket
• Chain Pitch: #41/40/420
• Teeth: 48T, 54T, or 60T
• Bolt Pattern:
  (4) 5/16" Bolt Holes on a 2-13/16" Bolt Hole Circle
  (4) 3/8" Bolt Holes on a 2-7/8" Bolt Hole Circle
• Bolt to Bolt Measurement: 2.03"
• Center Hole: 2.1"
• Condition: New
• Material: Steel

https://www.bmikarts.com/41-420-Sprocket-48T-54T-or-60T_p_16985.html