insomniac jack Posted March 20, 2016 Share Posted March 20, 2016 hi, 2 years ago, I bought a 1975 Dt125, which I found buried at a mates furniture workshop. it hadn't been on the road for 20 years, but was quite tidy considering. I got it going and rode it for the summer, and it went ok, but vibrated a lot over 50mph. last year I was too busy to do anything with it, but I am looking to get it tidied up for this summer. I have a few questions that I'm hoping someone may be able to help me with. Firstly, to enable me to buy the correct bits, I wonder if anyone could clarify what model this is? the engine number is prefixed with 1F9-, does this make it an "F" model? that would make sense, but from what ive read, its a bit early for that? secondly, having been used to bigger bikes, ranging from RD400, 350LC, XT250 to XS650, I am finding it a bit lacking when it comes to steep hills, reminds me of my FS1E! the gears seem to be long winded and I'm either revving the nuts off it, or its doing 2000 rpm. so I was wondering about sprocket sizes, or possibly a 175 conversion? is the 175 conversion a straight swap? I would assume the head would need to be changed as well? what about the carb? are they the same as the 125? any help would be appreciated! Link to comment Share on other sites More sharing options...
Malleus Posted March 20, 2016 Share Posted March 20, 2016 I have no answers. But post pictures Also good to go to new members area and introduce yourself. Lets people know that you didnt just post this and run away, which happens a lot, so members are reluctant to spend time and effort giving advice if the OP never comes back! Good luck, sounds like it could be a good project. Link to comment Share on other sites More sharing options...
Variomatic Posted March 20, 2016 Share Posted March 20, 2016 Yeah a 125, even a 2 smoke like an old DT will be lacking when it comes to hills, only so much you can do with 7.6ci of pure 2 smoke fury. But then again with it's age a spruce up with a new piston, rings and barrel might give it a bit more poke when it matters, did for me. Link to comment Share on other sites More sharing options...
Sacha Posted March 30, 2016 Share Posted March 30, 2016 Compared to an RD350LC... I'll bet that's a helluva difference. LOL Link to comment Share on other sites More sharing options...
KevtheRev Posted March 30, 2016 Share Posted March 30, 2016 The 175 set up fits straight on , but you'll have to reset the two stroke pump for some extra oil . Not too sure but maybe the carb is the same , might need rejetting though . There wont be much difference on the road though . The little extra power is handy off road . If she's vibing badly you should replace the crank and main bearings though . I'm sure all those years lying up will have left their mark . Link to comment Share on other sites More sharing options...
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