2018 250 magician front sprocket

[1111scott]

picked up a used 250 magician to use in woods and has way too much speed in 1st gear

looked at changing front sprocket from 15t to 12t to slow it down but only see 17mm or 25mm outer diameter shaft replacements

my front sprocket is 19mm outer 15mm inner with 6 points , do not know size of chain but clearly odd ball shaft size

what are OEM sprocket specs on 2018 250 magician made by chongoing haosen

need front or rear sprocket changed to slow bike down who sells this odd ball front shaft size for 250 magician ? would like to find a 10t or 12t to slow it down would be cheapest way

thanks