Bonneville America Forums Forums Technical Forums Performance Mods Big Bore

i went with the wiseco kit when i did mine. the stock sleeves bored get very thin. the weisco sleeves are pretty thick. with major heat everything i read says that the weisco kit takes it better and actually gains power while the nikisil expands more because its thin. is that totatlly true? i don't know but makes sense seeing the way both motors look apart. seems the only issue on the weisco kit is who does the sleeves and boring. there are also many more weisco bikes out there that have had zero problems, and i have about 5k on mine and i beat it every time i ride. to bad that delphi forum is not there anymore because even tho they were a pretty harsh group they knew there stuff pretty good. just try and read up as much as you can and go from there. i don't think you can really go wrong either way you decide.