Spark problem
-
Missinglink
- On the ladder

- Posts: 81
- Joined: Sun Aug 28, 2022 8:51 pm
- What Bike or Bikes Do You Own?: Tenere 55W .... T7 and too many others
- Location: Scotland
Re: Spark problem
Doesn't make sense, so with a separate feed to the coil and CDI the voltage dips below the threshold and you get no spark ?
-
alands
- No Gold Stars Yet

- Posts: 14
- Joined: Fri Feb 23, 2024 8:17 am
- What Bike or Bikes Do You Own?: Yamaha xtz750
- Previously Owned Bikes: Honda xr400
Re: Spark problem
Sorry I miss-led you
I have only tried it with the coil and not the cdi
Will try it tomorrow
I have only tried it with the coil and not the cdi
Will try it tomorrow
-
scottieh
- Financial

- Posts: 796
- Joined: Wed Mar 30, 2011 3:58 am
- What Bike or Bikes Do You Own?: 1988 XT600Z 3AJ
1987 XT600Z 1VJ
1985 XT 600
1980 TT500
1980 XT250
2001 KTM 300XC - Previously Owned Bikes: 1982 XT550
1981 TT250
1989 Yamaha Virago 750
1994 DR650
1980 Suzuki GR650
1997 KLR 250
1986 Honda Spree - Location: Salt Lake City
Re: Spark problem
Whenever i’m testing coils and spark the general rule of thumb i follow is that if everything around the CDI tests as good then it’s probably the CDI that is bad. Can you get your hands on a known good CDI and test with that? You said you got a cheap one…alands wrote: Sun Mar 24, 2024 4:08 pm Sorry I miss-led you
I have only tried it with the coil and not the cdi
Will try it tomorrow
-
alands
- No Gold Stars Yet

- Posts: 14
- Joined: Fri Feb 23, 2024 8:17 am
- What Bike or Bikes Do You Own?: Yamaha xtz750
- Previously Owned Bikes: Honda xr400
Re: Spark problem
Just tried the cdi with a separate 12v supply.
Same result
Good sparks until I screw the plugs in
Has anyone got a spare cdi???
Same result
Good sparks until I screw the plugs in
Has anyone got a spare cdi???
-
alands
- No Gold Stars Yet

- Posts: 14
- Joined: Fri Feb 23, 2024 8:17 am
- What Bike or Bikes Do You Own?: Yamaha xtz750
- Previously Owned Bikes: Honda xr400
Re: Spark problem
I’ve sent my cdi over too a company in Holland to repair.
They will have do a diagnostic on it and repair it needed
They will have do a diagnostic on it and repair it needed