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Discussion in '2 smokers' started by alfredman22, Jan 17, 2012.
Ok I found the chain tensioner speed and sport inc has them just look them upthey have them
Just checked the title, its actually a documented 1977 model with 4,065 miles not a 1978 like originally thought. My memory must be going:huh
Checked out speed and sports, nice find. Man all those parts add up fast, over $130 and counting. Gonna check out yamahaenduro.com and see if i cant find a "gently pre-enjoyed tensioner."
What is the flat spot a 4,000 RPM? Sorry coming from a 170HP liter bike, this bike feels like one giant flat spot! Are we talking a studder, or just no power? Bike seems relatively smooth, just needs to be reved to make it anywhere.
I live in Spokane WA, elevation between 1200 and 1500 ft. Ours ran really fat and thus felt flat many times when I first had it running on new stock sized jets. I ended up jetting is down 3 steps on the main (I went 1 at a time) and if memory serves me correct, dropped the needle 1 clip. It sure woke the bike up and mileage increased dramatically.
After the jetting is doesn't smoke much at all even under full throttle. You know its a 2 stroke but there isn't the trailing cloud of smoke.
What jets are in it?
I had two Yamaha DT 250s. First, the first year model DT-1. These bikes were pretty much color coded with the 1968 being white. Then, later, I picked up a red 1972. Two of my best buds (class of 1972 now) had an AT-1 (125) and a CT-1 (175). I was pretty impressed with the spunky 175 engine. The 125s had electric start (why??).
The friend with the CT-! later bought an RT-360.
No idea what jets are in the carb, and its actually sleeping for the season in storage right now so no way to look. Must be jetted pretty well as there really was no noticeable two stoke smell at all. Thanks for all the help guys!
That was my first bike! A 1979 DT125F.