Saving a 1980 750 twin.

Just some recommendation DoctoRot for your engine rebuild.
Only buy the head gasket part #: 11004-1267, the green one
It´s the last and best cylinder head gasket for the 750 twins

A little gasket history :
11004-071 => 11004-078 => 11004-1055 => 11004-1267
11004-071, recall campaign in June 1976
11004-078, the red one with black middle section
11004-1055, light brown, comes with the first LTD model
11004-1267, the green and the best for the last LTD model





Full story and source but only in German language.

www.z750twin.de/zylinderkopfdichtung.htm

Hey thanks very much for that info, i did not realize Kawi had so many different gaskets. I was going to use the Versah gasket that came in my kit but i have now ordered one of the green ones.

It seems like these 750 twins are more popular in Germany, is this true? any reason why? People cant seem to give them away in the US.

translated with google
Steve

People here in Germany discover that a classic car or bike is like a good investment.
Prices for a classic car or bike,(older than 30 year are tax and insurance reduced), go high as i never seen before. It´s like a must have in every garage. The used classic car/bike market prices goes insane!

A little example of madness.

One of the early Porsche 901 #57, build in 1964,(aka 911) was found in a abandonment garage goes for 107000 EURO back into the Porsche museum for restoration!!!







A CLASSIC car rebuild in Germany

Finally got around to making mirrors for this thing. I got these cheap mirrors off ebay for $20, they are actually pretty nice, solid aluminum construction and convex glass. I used the old head studs for the stems, turned a little cap where the mirror attaches, tig brazed it on, and  polished it back. I also had some stainless flange nuts that I trimmed  down so they wouldn't be so bulky.

very nice work!


leon

I'm finally getting settled into my new place (two car garage!) I have located my broken down engine and more importantly I just received my freshly blueprinted crank back from Falicon. I got a new connecting rod and sent everything to them. I was perusing the factory manual where it clearly states, " you MUST replace the connecting rod bolts if they are loosened or removed." I cant find a complete set of new ones. How imperative is it to use new bolts and nuts? Also, In the spare engine I tore down I noticed it succumbed to the same issue; seizing the wrist pin. Are there any steps I can take to address this? Both connecting rods that i am going to use have heat marks in the small end of the rod. I was planning on re-honing them. Any advice/suggestions for crank reassembly?

getting a move on this. Engine is going back together! I sent the whole crank/piston assembly out to be balanced, and i thought they would remove the crank oil gallery plugs and clean them but they did not. I cleaned them as well as i could without removing the plugs, then got a nagging feeling and decided to dremel out the plug screws. Im glad I did because all that black shit was in the crank oil gallerys still. I didnt have a good punch to stake the gallery plugs with so my buddy suggested i tack the screws in with silicon bronze. The bottom end is assembled with new bearings, new cam chain and APE HD studs. I honed the small end of the connecting rods with a 320grit brush hone to remove the glaze. they haave a nice cross-hatch now. It specfically says in the manual "DO NOT REUSE CONNECTING ROD BOLTS" but after talking to the dudes at Falicon Cranks they said it would be fine. I'm waiting on a buret so I can measure the piston dome of these custom pistons so I can determine the new compression ratio.

Nice work Doc, have you weighed your pistons?

The custom pistons are 310g the stock are 330g. Falicon balanced the whole piston assembly with the crank so this thing should be super smooth.

Cool, smooth is good ,
when I did mine I found the number 3 piston was 3.7 grams heavy, I evened them out with a small ball grinder, a little here a little there.
Weighed the wrist pins but didn't have the chance to weigh the arms, it's great you did