Stock brake lines on the Kymco Mongoose 300/250 WILL NOT be long enough to install the +6.0″ kit but should be long enough for the +4.5″ kit. Usually we try to let customers know if they will be long enough, and if they can get by without extended brake lines, but in this case there is no alternative.
Diamond J Customs does sell brake lines if you would prefer to use extended-length stainless steel braided brake lines with your widening kit.
You can find more general information about our widening kits under the Front Widening menu on the Home Page.
Instructions Download: K250_SWID_tri-fold_instr
YouTube Videos with this kit: