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How do you set the ignition timing for a 1971 yamaha 125 enduro motorcycle?

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You would have to mess with the points to adjust the timing. other then that there is no adjustment.

Posted on Jun 08, 2014

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 37 Answers

SOURCE: 1971 yamaha 175 motorcycle electrical problem

ill do a list of things that can help or be the problem.

1) Pull the coil off and wire brush down all the bare metal. then do the same to the frame where it bolted on. Make sure there is a grounded wire that bolts back onto the coil if there was one, Replace the wire end for the ground peice.

2) Pull off the spark end cap and cut the wire down a few mm until you see new wire then screw it back on. (if its NGK)

3) follow the wire from the kill switch and make sure it isnt grounding out.

4) Hotwire - find the kill switch and unplug it. if this doesnt help unplug the ignition key wiring. on older bikes it will work for ignition but not lights for the key part. if this helps you need a new Ignition barrel / Kill switch.

5) check your wiring harness make sure it isnt grounding anywhere exept where its ment to.

6) make your your engine to CDI is plugged in and has no oxide in it

7) try and find somone with a running bike the same as yours and borrow there CDI, if this helps you need to buy a new CDI or check yours for wiring shorts.

hope this helps if not buzz me (skuly@Hotmail.com)

Posted on Feb 17, 2010

robotek
  • 1512 Answers

SOURCE: I need 1974 Yamaha DT 250 enduro Parts Diagram and

GDay mate

Took a bit of scrounging bout the net, but I eventually found it!!

You can look at the parts diagram/part numbers for the old girl here

A rating and feedback is a great way to reward me for my efforts to find this for you. Cheers mate!!

regards
robotoek

Posted on Jun 20, 2010

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1 Answer

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ill do a list of things that can help or be the problem.

1) Pull the coil off and wire brush down all the bare metal. then do the same to the frame where it bolted on. Make sure there is a grounded wire that bolts back onto the coil if there was one, Replace the wire end for the ground peice.

2) Pull off the spark end cap and cut the wire down a few mm until you see new wire then screw it back on. (if its NGK)

3) follow the wire from the kill switch and make sure it isnt grounding out.

4) Hotwire - find the kill switch and unplug it. if this doesnt help unplug the ignition key wiring. on older bikes it will work for ignition but not lights for the key part. if this helps you need a new Ignition barrel / Kill switch.

5) check your wiring harness make sure it isnt grounding anywhere exept where its ment to.

6) make your your engine to CDI is plugged in and has no oxide in it

7) try and find somone with a running bike the same as yours and borrow there CDI, if this helps you need to buy a new CDI or check yours for wiring shorts.

hope this helps if not buzz me (skuly@Hotmail.com)

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