Cough, cough, I plan on trying 1200 cams in my hybrid with 1000 heads. The 84-85 had double the overlap of the other years. I have a top mounted tank and front crank mounted ignition so it is fairly easy for me, as it would be for 1100's if you installed an electric fuel pump.
They're just numbers, but the pretty significant increases in both hp and torque of the 1200 have perplexed me. 15% more on each. The 100 ccs extra on the 1100 didn't make that big a jump. People have always pointed to the smaller valves, smaller intake runners as part of the reason, but if the rocker arms were longer, the 1200 may have had more valve lift than the 1000's. Their breathing ability has been attributed to speed of the incoming charge.
I will be using the 1000 rocker arms because the 1200's don't have the adjuster on the one end. Just curious about them.
The 1200 cams had a larger base circle so regrinding them would be safer/stronger in this application.
Thanks again for any info anyone might have.
Last edited by Ekvh1; 01-28-2017 at 12:19 AM.
Reason: Add info