I disagree, your A15 1200 will be able to beat a Honda anyday if you build it right. You'll probably have to do more than dual carbs, higher compression, and an electronic ignition however. You need a bigger cam to eat the fuel up on those carbs, also you need headers and a good exhaust to let it breathe out all you're putting in. You should look into a lightweight flywheel and headwork also.

My A15 had stock compression but a .229 duration cam (@.050" lift), rebuilt and balanced rotating assembly, alloy flywheel, dual Dellortos, Nismo header, oversize Si valves w/dual springs, ported and polished head, electronic ignition, 1.5:1 Nismo rocker arms, and electronic fans and fuel pump, and it did about those times (high 15's in the quarter mile, 0-100 kmh in about 7 seconds). I say go for it, it'll be way more fun than your Honda!