MARTIN did u check out racetech? its a good site for seeing what springs are for the weight, it says 11.5 for you I know you can make do with stock springs but you would be surprised how much better you would feel with a spring for yourself. I have a spring another bike that was for 230 lbs let me do some research to see if its same length and all other dimensions to see if it will fit a L and ill let you know maybe i can dump it off to ya and help ya out a bit ill get back with you when i get the info
ya cool site. hey that would be killer man!