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Yamaha DT1F
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Posted by: kevin123---------------------
I have a yamaha DT1F. I don't know what year it is, the date is worn off the tag. The neck is stamped DT1F-30210. I think it's a 250. Does anyone know how to figure out what year it is? What years were these bikes made? Any info will be helpful. Thanks.
Posted by: Succubus---------------------
There is a chart at offroad dot com forward slash dirtbike forward slash machines forward slash classicyamaha (you can't do web addresses here) for vintage Yamahas. According to the chart, your bike is a 1971 DT1MX. It is a 250. Cool bike. Pretty simple rebuild. I have a 1969 DT1B. It should be pretty similar.
The parts from 1968 to 1971 DT1s should be compatible. After 1972 you get into DT2s and DT3s. After 1974 they became DT250s. Some parts from the DT2s and DT3s are compatible. The DT250s are not usually.
Get a service manual. Have fun.
Posted by: kevin123---------------------
Thanks. That's a handy chart, but where does my bike's numbers fit in? Mine says DT1F-30210, the chart says a 1971 MX starts at DT1F-090101. Am i reading the number wrong? I would think that 30210 would come before 90101, wouldn't it?
Posted by: Succubus---------------------
You're right, Kevin. When I glanced at the chart I thought it said that the DT1MX was up to 90000, not started at...
Still a very cool bike. My DT1 is a lot of fun. Another good web site for your rebuild, if it needs a rebuild, is Yamaha-motor dot com. It's the factory site. If you go to the parts section it has parts fiches on every model of Yamaha motorcycle ever made (at least all the ones I've heard of) including part numbers. That way you can tell for sure what parts cross between the models. It was invaluable to me when I rebuilt my DT1B. Check it out.
Patrick
Posted by: kevin123---------------------
The bike is thrahsed, it needs one of everything. The forks dont' move, the cables are seized, the wires are cut, and the seat is busted. Anyways, I still don't know what year it is. I'm guessing that because it has a headlight, it is an Enduro and not an MX.
Posted by: JohnRichardson---------------------
This thread is so old now and having just joined the site because of my interest in finding a suitable restore project I thought I would offer some information. The Frame and Engine number are in fact for a 1968 DT1F which was the first and original DT1. I worked for Ken George Yamaha in Western Australia from 1969 to 1974 at the time of the release and rise to popularity of these Yamahas. The 650 twin was the same , the first model being designated XS1F (drum brake, no electric start). Back to the DT's the DT1A was next followed by the DT1B and then reed valve DT2 and then DT3 before going to monoshock DT250A, B. C, D, E, and finally F. I know little about the models that followed this except that they are probably the liquid cooled engines although the 4stroke XT 250 was released and the 2stroke unfortunately virtually disappeared. The DT1F was available only in gold with black pinstripes or white with same pinstripe. All engine and frame numbers were 5 digit as apposed to the DT1A 6 digit. DTMX was not a terminology given to any trail bike with lighting etc but only given to competition models. We sold many of the DT1 CT1 and AT1 and AT1FE (125 electric start 12v) (some modified before the advent of purpose built bikes) to farmers who started using m/c's for sheep mustering in place of horse back. As an aside Western Australia also had a RD250G and back from the 400 to the 350 for the RD350G and these 2 models are never mentioned anywhere on the web that I can find. The tank shape reverted from the angular E, F models to a softer shape very similar to the first LC shape. It will not be widely known that WA was a huge market for Yamaha and the other Japanese m/c manufacturers.
Just some useless trivia I thought may be helpful to someone somewhere.
John
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