Saving a 1980 750 twin.

A gate surely couldn't hurt. I don't think I have ever seen KZ scrapers. Got a pic?

store.schnitzracing.com/mtc-oil-pan-gate-kawasaki-kz900-kz1000/

Thanks Mikaw, I have seen baffles and gates, but not a scraper.

oh man! shits getting exciting! Got the block back with the custom sleeves. I am a little worried about the ultra thin gasket area by one of the studs. I guess if it leaks a little there that is the penance I pay for the big bore, this is the same surface area the stock gasket has but I have lost the o-ring around the sleeves. I wonder about the efficacy of the o-ring on the sleeves anyway. time will tell.

Last pieces of the puzzle are getting the new crank balanced, trans undercut, and getting the cylinder head back from having some custom goodness implanted in it.

I bored the cases to accept the larger sleeves. only took 2mm to make it fit. There is one area by a stud that will be sealing on a hope and a prayer. I might try to fit an o-ring in the counterbored portion. One thing I noticed when dry fitting the block is the case side of the cylinder block has about .006” of taper. I called LA sleeve about this and they said it would be fine, and that they don’t want to press out the sleeves to cut this surface at this point as it will distort the sleeves. Kind bummed they didn’t catch that but not a lot I can do now except cross my fingers.

Great work on the engine Vic, Keep on posting your Progress. BTW a pic of an German KZ750 twin (950ccm) race bike.

I have seen Michael's posts on his 750twin race bike on the lonesome twin. a super cool machine for sure.

Just got a sneak peak from Chris at Schumann Motor Works. He is making his top of the line custom valve train, complete with titanium valves (1mm bigger on intake) custom bronze valve guides (reduces the valve stem diameter from 8mm to 7 mm), beehive springs, and titanium retainers. He is also doing some porting to blend out the bigger intake valve. This was way more than I initially reached out to him for, but he called me up saying hes stuck in his house with the "Shelter in place" measures, so for a small increase in cost he is giving the cylinder head the full treatment! This program just got kicked up a notch. This may be the only KZ750 twin in the world with titanium valves.

Daaaaaaaaang :woohoo: :woohoo: :woohoo:

More cylinder head porno from the machinist

Spent some time on the lathe and mill today. Whipped up a new front axle. I repurposed a hollow katana 1100 axle and welded a custom 316 stainless nut on one end. The other side is 7075 aircraft grade aluminum. Weighs 8oz less than stock.