74 DT175 spark first 2 kicks then nothing.
'76 Bultaco 143 Frontera
'68 YG5T 80 Trailmaster
64 McClane Edger
I'd suggest trying another coil.
Rob wrote: Sorry for cutting in but I have a 1975 dt125 with a 1977 engine fitted has no wiring I want to fit lights indicators horn but cannot get wiring diagram a member said your bike might be similar to mine if it's not to much trouble could u take pictures of wiring and where regulator and other electrical parts go that's if u have wiring harness fitted thanks rob
Try the section on electrics towards the end of this manual from the Tech Library.
However, you might have some fun and games, as I believe that the DT125 was 12v and had an electric start and the DT175 was 6v and didn't.
I typically have someone pull start me, but that's A Hole Nuther Ballgame and I'm not about to suggest that method.
70 Yamaha CT175
71 Yamaha CT175
71 Yamaha JT60
72 Yamaha JT60 (2)
74 Yamaha DT360
75 Yamaha GT80
75 Yamaha DT100
75 Yamaha DT125
75 Yamaha DT175
76 Yamaha DT175
75 Yamaha DT250 (2)
75 Yamaha DT400
76 Honda Z50
17 Yamaha SCR950
"Someday, you'll own some Yamahas"
Check the wiring under the flywheel to see if anything has rubbed.
I'd try disconnecting the kill switch(es) and checking the connection in the wire from the stator to the coil... maybe disconnect the harness and run a wire from the stator to the coil and bypass everything else...
74 might be one of the years the 175 had a diode in the wire from the points to the coil. Diode could be bad? A picture of the engine wiring harness plug where it connects to the main wiring harness would be helpful. Does it have an extra black wire not connected to anything?
Wiring diagrams and manuals are available in the Tech Library here.