Running rough at full throttle

Joined
Jul 2, 2009
Location
califrona
#1
Looking for some info. Ihave a 1982 oil injected susuki DT140 good motor ,but when i give full throttle goes grate for about 2 -3 minutes then starts running rough till i back out of throttle a 1/4 to1/2 way then it smoths out but i like to run wide open:party0045: u now what i mean.any suggestions :confused: