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use good quality 2-stroke pre mix (tcw2/tcw3) tcw2 semi synthetic oil tcw3 full synthetic oil I use klotz tcw2 in my 72 Yamaha r5
that is the vin number and the serial number
I think it will. If you look at biebandit.com and find the oem Yamaha parts for the motorcycles in question and check to see if they are the same part number, if they are then they will interchange. you can crosscheck different years too if you found a 1975 ty 175 cylinder for your 1975 dt 175. So check out bikebandit and see for yourself, they are the next best thing to a Yamaha dealer.
1975 mx250B
According to yamaha, it's 32\1 or 40/1.
1975
28
Its just black with decals.
Check these out Yamaha-motor.com see link to the right goes back to 1965 yamaha motor manuals online
1000 cc
Should be between the handle bars and on the frame
best spark pluguse a ngk.cu they are the best spark plug for that year.and they also workk very well.so i hope this helps you out.I have a 1975 Yamaha DT 175 that I have owned since 1976 when I bought it new. I have also owned a 1975 Yamaha DT 125, Dt 80 and MX 175. Being that I've owned all these bikes and that I still own a 1975 Yamaha DT 175 that I bought brand new, I know what spark plug it takes. It takes a NGK B8ES. A Champion N3C can also be used.