I recently acquired a 1974 f7 175 cc enduro motorcycle and noticed something very unusual ! It is a 1 cylinder motor -w- 2 plugs and only 1 plug wire? upon closer inspection it is a factory made part with no 2nd plug wire in sight,i have tried several forums -w- no legit response? is this truly a one of a kind? jim

 

Pretty much normal. I think Yamaha used to do the same thing on some of theirs. Only a few European bikes ran twin ignitions, Bultaco Pursangs are one I knew for sure.

It wasn't unusual for a Japanese two stroke to have two plug holes in case one gets fouled. Of course being Japanese, with their quality, and the use of oil injection, which adjusts oil mix as to need by RPM, this was usually unneeded.

Flat trackers who built these engines up for racing would put a compression release in the side hole, to give a bit of braking into corners to set up the slide.

Someone just stuck a second plug in the hole, which was usually filled with an appropriate size bolt that was just long enough to fill the hole, no longer.

For the record, the reason I know this is because I took up riding in the late 60s and read everything I could get my hands on along with some racing on flat track and harescrambles in the 1970s. Having owned and had friends that owned Bultacos I knew about them. I also saw the Kawasaki, Yamaha, and Suzuki models of the time too. So I can pretty much guarantee this answer to be correct.

 

from what you just said this not unusual and isnt a rarity,just a freak of kawasaki?

 

Not a freak, a somewhat common practice at one time. Twin plugs meant a switch of the cap would work or a compression release can be fitted.