keithp, running the longer pipe did seem to help the noise abit. i also installed 'lollipop' washer/baffles an inch from the end of the pipe. i have them turned to 90 degrees which is supposed to help bottomend.....
i jetted and tuned to this set-up and its works great!
ksqrly, thnx! i welded some angle iron and am using a large heavy duty zip-tie. the battery is the stock size, its right behind the voltage regulator. i also weded a small plate there to hide batt and mount volt. regulator.