gs40x-103279 what is this engine from???
hey guys i pulled a motor out of a stripped down streetbike and these are the numbers on it. i cant order parts till i know the year/model of the bike. it was my old mans, he thinks its a 1984 gs400 but he doesnt really know. i checked the vin and it was rubbed off
besides the last couple numb. "500490"
i am new to these bikes completely and any info would really help me out. the motor is a v twin with 4 valves per cylinder.