CB400

[racercat3]

I know this probably wont get a response but, im working on a 1978 honda cb400t ,in terms of timing it appears that both cylinders hit TDC at same time , so which cylinder do you set your timing to??? i know its a total newb question but any response would be greatly appreciated

 

[8ball]

You set timing to the one that is on the compression stroke. But actually, looking at the parts fiche, there is only one coil so it is a wasted spark motor, which means the coil fires both cylinders at the same time. Each cylinder gets a spark for the compression stroke, and a second spark on the exhaust stroke (wasted spark) that does nothing. You can set timing on either cylinder because they both get a spark every time the piston comes to TDC...whether it is on the compression or exhaust stroke.

 

[racercat3]

Cool , that helps a lot ,,, Thank You