Just bought an 06 650 R and opend it up a little. went to 172 Main, 68 slow, removed restrictor from intake, opend up air box and drilled out exaust tip. However I rode 55 miles and had to hit reserve. then I had to lay it over on its side to get it home. 69 miles total aprox. slightly less than a quart of fuel left. Is that average gas mileage for these mods? or have I done something wrong? Maybe I just need a desert tank? Please let me know if this is normal. I would much rather buy a desert tank then set out to fix a prob that isn't there!!!