Static ignition timing ,, XL350 , should be adjusted to the "F" flywheel mark , not the "T" one. "T" mark (Top Dead Center) is used when installing the Camshaft , rather. The engine will run when adjusted @ "F" (about 5 deg off) like shown , but not 100% right. "F" stands for "FIRE". All points-equipped Hondas at the time used 'T" and "F" markings , all for the same reason. : ignition should happen a few degrees BEFORE piston hits TDC for better power. Then higher revs will ask for more timing advance , thus the points cam centrifugal advance , which is tested using a timing light as you know. But I found at the time that a simple static timing was entirely good enough (point gap .014" , points opening at "F" mark ) Note : the mechanical advance will dry up and selff destroy with time, for lack of proper lubrication. Use heavy grease , sparingly.
Static ignition timing ,, XL350 , should be adjusted to the "F" flywheel mark , not the "T" one.
"T" mark (Top Dead Center) is used when installing the Camshaft , rather. The engine will run when adjusted @ "F" (about 5 deg off) like shown , but not 100% right.
"F" stands for "FIRE". All points-equipped Hondas at the time used 'T" and "F" markings , all for the same reason. : ignition should happen a few degrees BEFORE piston hits TDC
for better power.
Then higher revs will ask for more timing advance , thus the points cam centrifugal advance ,
which is tested using a timing light as you know. But I found at the time that a simple
static timing was entirely good enough (point gap .014" , points opening at "F" mark )
Note : the mechanical advance will dry up and selff destroy with time, for lack of proper
lubrication. Use heavy grease , sparingly.
Where are you located ? I have a 1978 Honda XL-350 that I would like the valves adjusted - you up for the job ?