Good evening my Sachs fellows, this seems to be the most comprehensive Sachs thread, so I thought I'd post this here.
Was looking through my sachs 505 manual (attached) that was provided to me by tim of motoverde in Ohio, whom I also bought my bike from. The compression ratio on A and D engines is identical (8) per the manual, yet the stroke is 2mm longer. However the piston is also shorter.
I'm really confused, because I'm putting a "D" setup on a non-labeled engine with the smaller non-D/C head. The piston is correct for the "D" kit I got, but the rod in the crank is not. It is labeled as a xxx102xxx rod instead of the longer xxx103xxx rod that should be found in "D's". So I'm guessing the person I bought it from had a C, but thought it was a "D".
The non-labeled engine I'm taking apart, had a D piston in it and an A angled intake cylinder (def not a D). I really don't know with these things anymore...
The "D" pistons I'm referring to are the ones furthermost right in the picture of pistons above.
I'm just throwing the square cylinder on there and hoping for the best - these sach's have me so confused.