Waterloo Specialties

1UY-20
87 Warrior

First unplug everything from CDI. You need to check resistance, yellow to green and grey to blue on stator side. Should be 200 Ω each. Red to brown should be 300 Ω. No resistance from any of these wires to ground. Black/red must be grounded by ign switch when on. Black must be ground always. Black/white must not be grounded. Coil primary orange should be 0.5 Ω. If all this is true, CDI is bad. NOTICE, this CDI will only work with a OEM Yamaha ignition switch!

1YW-20
87 - 88 Big Bear 87 - 89 Moto4

First unplug everything from CDI. You need to check resistance, yellow to green and grey to blue on stator side. Should be 200 Ω each. Red to brown should be 300 Ω. No resistance from any of these wires to ground. Black/red must be grounded by ign switch when on. Black must be ground always. Black/white must not be grounded. Coil primary orange should be 0.5 Ω. If all this is true, CDI is bad. NOTICE, this CDI will only work with a OEM Yamaha ignition switch!

 

2XK-20
88 Warrior

First unplug everything from CDI. You need to check resistance, yellow to green and yellow to blue on stator side. Should be 200 Ω each. White/green to red should be 300 Ω. No resistance from any of these wires to ground. Black must be ground always. Black/white must not be grounded. Coil primary orange should be 0.5 Ω. If all this is true, CDI is bad.

3HN-00
89 Big Bear 89 Moto4

 

 

 

 

 

3GD-00
89 Warrior

First unplug everything from CDI. You need to check resistance, yellow to green and grey to blue on stator side. Should be 200 Ω each. White/green to red should be 300 Ω. No resistance from any of these wires to ground. Black must be ground always. Black/white must not be grounded. Coil primary orange should be 0.5 Ω. If all this is true, CDI is bad.

3HN-10
90 - 94 Big Bear 90 - 94 Moto4

 

 

 

 

3GD-20
90 - 95 Warrior

First unplug everything from CDI. You need to check resistance, yellow to blue on stator side. Should be 200 Ω. White/green to red should be 300 Ω. No resistance from any of these wires to ground. Black must be ground always. Black/white must not be grounded. Coil primary orange should be 0.5 Ω. If all this is true, CDI is bad.

3HN-20,30
95 - 96 Big Bear 95 Moto 4

 

 

 

 

 

3GD-30
96 Warrior

First unplug everything from CDI. You need to check resistance, white to red on stator side. Should be 200 Ω. Green to brown should be 300 Ω. No resistance from any of these wires to ground. Black must be ground always. Black/white must not be grounded. Coil primary orange should be 0.5 Ω. If all this is true, CDI is bad.

4GB-00
93 - 95 Kodiak