CA78 Tachometer

garncarz · Post by **garncarz** » Fri Dec 20, 2013 8:29 am

Does anyone know the redline for a '66 CA78? I want to buy a small aftermarket tach and want to get the right range. Thanks.

brewsky · Post by **brewsky** » Sat Dec 21, 2013 4:37 am

Owners manual lists max HP @ 7,500 on the 305

garncarz · Post by **garncarz** » Mon Dec 23, 2013 10:02 am

I am thinking about going for a mechanical tach. Will the cylinder head cover with the tach drive unit (12341-268-060) from a CB77 fit on a CA78 engine? Any insight into the drive ratio?

LOUD MOUSE · Post by **LOUD MOUSE** » Mon Dec 23, 2013 11:47 am

It will fit and you will need to have the left side cam shaft to drive the cable.
That said you will need to change to CB72/77 cams and cut away one of the sprocket flanges on the left side cam.
What tack unit do you intend on using? .............lm

garncarz wrote:I am thinking about going for a mechanical tach. Will the cylinder head cover with the tach drive unit (12341-268-060) from a CB77 fit on a CA78 engine? Any insight into the drive ratio?

Tinman · Post by **Tinman** » Mon Dec 23, 2013 12:00 pm

Garncarz,

If you don't want to go through the hassle of modifying your engine to accomdate a mechanical tach, you can install one of these electrical tachs. There is a wiring diagram at the end of the ad, just scroll down.

I know its not OEM, but it's chrome/white faced and will clamp onto the handlebars as a bracket is included.

http://www.ebay.com/itm/1-7-8-MINI-ELEC ... 9d&vxp=mtr