GS1100 blocks

[Big Jay]

We have two GS1100 blocks in our used parts dept. One says 1074cc and the other 1075cc. Never noticed that before?

[blowerbike]

i have had both...both was silver which means 80-82.
not sure what it means if anything...

[dorkburger]

I read here recently thats how 2 valve and 4 valve blocks were differentiated.

[TeamDar]

I read here recently thats how 2 valve and 4 valve blocks were differentiated.

Don't believe everything you read here. The 2 valve and 4 valve blocks are nothing alike other than they have 4 bores and fins. Don't need the cc label to tell them apart. Suzuki labeled the 4 valve blocks both ways for some reason but I haven't heard what it was.

[dorkburger]

Don't believe everything you read here. The 2 valve and 4 valve blocks are nothing alike other than they have 4 bores and fins. Don't need the cc label to tell them apart. Suzuki labeled the 4 valve blocks both ways for some reason but I haven't heard what it was.

.....just passing along what I read. Clearly and thankfully there are people here far more knowledgeable then me

[jimb12]

My 1982 1100EZ block said 1074cc and my friend's 1980 1100ET block said 1075cc. Probably some sort of production change.

[blowerbike]

My 1982 1100EZ block said 1074cc and my friend's 1980 1100ET block said 1075cc. Probably some sort of production change.

and there you have it...
a helpful post with useful information.