Replacing the chain ring?

[RapidDog]

I have a 2018 Xduro 7.0 that I want to change the chain ring on up from the 38T it has. Can’t seem to find out how to get it off for the swap.
It appears to have the bolts covered on the crank.
Thanks in advance.

 

[RapidDog]

Yamaha PW-X motor

 

[Paul Mac]

You're going to take off the whole spider using a castle nut tool.

 

[RapidDog]

So you need a special tool...dang.

 

[vidwiz]

I got similar tool off ebay for only about $17