Boyer Bransden ignition.

[gtmdriver]

Has anyone fitted one of their CB400F units (KIT00089) to a CB350F by any chance?

It completely replaces the points, condensers, the backplate AND the mechanical advance unit.

It has a built in electronic advance curve which has the same full advance figure as the CB350F but reaches full advance at 3500 rpm rather than the 350's 2500 rpm.

I don't think that would matter a damn in practice but I'd like to know if the Boyer Bransden unit will physically fit into the 350F

[hairygit]

All the SOHC fours use a common points plate, points and condensors, so yes, it will physically fit, but full advance coming in 1,000 r.p.m  later may be quite noticeable.

[gtmdriver]

Thanks for that.

I guess what I mean is that on the CB350F very little happens below 4000 rpm anyway so it's not going to be operating much in the 2500 - 3500 rpm range.

[bytio]

With the Boyer system on 750 SOHC,  full advance is set at 4500 rpm on strobe

[Johnwebley]

With the Boyer system on 750 SOHC,  full advance is set at 4500 rpm on strobe

 same as the 500/4

I have used Boyer since the late 1970'sand find them great.

just make sure your charging system is good,as you can get misfires if the voltage to the coil drops to 9v

[gtmdriver]

That's interesting.

My info comes direct from Boyer Bransden and they definitely said full advance at 3500.