Post by Rasputin on Jul 26, 2017 7:21:55 GMT -5
Hello fro UK.
I have just just fitted a Boyer ignition to my TX. Originally for a Triumph/BSA, I guessed it would do for the Yam.
The fitting involved some some simple mods to the Boyer unit. The rotor unit has to be drilled out to 8mm,then shortened by about 3/16 to 1/4inch by turning the taper away on the back. The circuit board with the coils on has to be reduced in diameter to match the existing points plate, this means mounting it on a mandrill and carefully reducing the diameter in a lathe, easy if you have a lathe. Set the system up on your engine, make sure the rotor is not fouling the back of the stator. Set up as Boyer instructions, give the centre of rotor a light tap, this will mark the rear so you can file a small slot in the rotor to fit around the peg on the drive shaft. A sleeve will be needed to fasten the rotor in position. 8.5mm I'd. 10.5od and long enough th trap the rotor tight. I mounted the black box on the battery with double sided tape. I also fitted a double output coil on the front of the battery box, I don't have an original air filter so there is plenty of room. Linked the power supply for the Boyer to a relay that is connected to the main live at starter solenoid, operated by the original coil live, red/White wire. This is a better way to supply the coil. Search resupply ignition coil on your browser, and follow the instructions.
Once all that is done, strobe the timing to ensure the fully advanced point is OK and you are good to go.
Any questions, just ask.
I have just just fitted a Boyer ignition to my TX. Originally for a Triumph/BSA, I guessed it would do for the Yam.
The fitting involved some some simple mods to the Boyer unit. The rotor unit has to be drilled out to 8mm,then shortened by about 3/16 to 1/4inch by turning the taper away on the back. The circuit board with the coils on has to be reduced in diameter to match the existing points plate, this means mounting it on a mandrill and carefully reducing the diameter in a lathe, easy if you have a lathe. Set the system up on your engine, make sure the rotor is not fouling the back of the stator. Set up as Boyer instructions, give the centre of rotor a light tap, this will mark the rear so you can file a small slot in the rotor to fit around the peg on the drive shaft. A sleeve will be needed to fasten the rotor in position. 8.5mm I'd. 10.5od and long enough th trap the rotor tight. I mounted the black box on the battery with double sided tape. I also fitted a double output coil on the front of the battery box, I don't have an original air filter so there is plenty of room. Linked the power supply for the Boyer to a relay that is connected to the main live at starter solenoid, operated by the original coil live, red/White wire. This is a better way to supply the coil. Search resupply ignition coil on your browser, and follow the instructions.
Once all that is done, strobe the timing to ensure the fully advanced point is OK and you are good to go.
Any questions, just ask.