Surfrat25 Posted January 31, 2014 Share Posted January 31, 2014 Hey everyone, I haven't posted in awhile! I had a couple of questions about my 1979 DT 125. There are rumors that I can add a 175 head and pistons to a 125 to make the cc go up. Is this a possible thing to do? - Change cylinder head from a 125 to a 175? What does this take to do and will it kill the bike overall? Anything helps!! Cheers! Link to comment Share on other sites More sharing options...
blackhat250 Posted January 31, 2014 Share Posted January 31, 2014 Yip" i done it last year, needed= barrell [ 171cc stamped on side] matching head, piston/ pin/ and smal lend bearing, the small ends and pin are not interchangable, exhaust is same , carb jets need to change main to 150. pilot to 30 , it may be 30 in yours older dt125 was20, its a case of see how she runs.. Oh gaskets are bigger, base head,, Link to comment Share on other sites More sharing options...
blackhat250 Posted January 31, 2014 Share Posted January 31, 2014 And will not kill her, [ same bottom end and stroke] vast improvement in power, and will pull 65mph easily, the clutch has 1 plate less on DT125 = ,,, may slip. at high rpm gearchanges, Link to comment Share on other sites More sharing options...
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