Lightened flywheel
Posted: Sun Dec 27, 2015 2:47 pm
First run today after some modifications and adjustments: synchronised carbs with adjusted float bowl height, lightened flywheel assembly and some minor other tweaks
A few days ago I finally found enough courage for pulling the flywheel. I stressed the Kedo puller to the max and -with a bang- the rotor/flywheel assembly came loose. And with a bang my forehead hit the fueltank. Ouch.
Original
Original
Minus 309 grams
Boxing day was used for some hours well spent at my dad's lathe. I removed 5 mm (3/16") from the center piece radius, leaving the shoulder for easy centering of the assembly. The flange with the one-way bearing is a pain. Even with a new carbide chisel it took ages removing a substantial amount of material. So after removing 3 mm (1/8") I called it a day. I aimed for the "Bill Jurgenson" aluminum flange design, but that would take ages. Still, in total 309 grams (0,68 pound) is removed.
Unfortunately I forgot to take pictures before assembling
Today I hit the starter button to determine any differences and checking the RAIN switch :
https://youtu.be/5UsaYGW9u1U
The rain switch retards the ignition curve by 10 degrees overall. The rpm drop at idle is significant when changing from 29 to 19 degrees advance around 1,400 rpm.
Although I checked the float bowl height and adjusted it according the Mikuni specs it still sounds rich when idling, even with 17,5 pilot jets and the pilot screw less than 1/2 turn out. My Innovate MTX-L AFR meter disintegrated a long time ago so at the moment it is guessing...
A few days ago I finally found enough courage for pulling the flywheel. I stressed the Kedo puller to the max and -with a bang- the rotor/flywheel assembly came loose. And with a bang my forehead hit the fueltank. Ouch.
Original
Original
Minus 309 grams
Boxing day was used for some hours well spent at my dad's lathe. I removed 5 mm (3/16") from the center piece radius, leaving the shoulder for easy centering of the assembly. The flange with the one-way bearing is a pain. Even with a new carbide chisel it took ages removing a substantial amount of material. So after removing 3 mm (1/8") I called it a day. I aimed for the "Bill Jurgenson" aluminum flange design, but that would take ages. Still, in total 309 grams (0,68 pound) is removed.
Unfortunately I forgot to take pictures before assembling
Today I hit the starter button to determine any differences and checking the RAIN switch :
https://youtu.be/5UsaYGW9u1U
The rain switch retards the ignition curve by 10 degrees overall. The rpm drop at idle is significant when changing from 29 to 19 degrees advance around 1,400 rpm.
Although I checked the float bowl height and adjusted it according the Mikuni specs it still sounds rich when idling, even with 17,5 pilot jets and the pilot screw less than 1/2 turn out. My Innovate MTX-L AFR meter disintegrated a long time ago so at the moment it is guessing...