yzf co

hello to all yamaha lovers. i need help- im building a 00'yzf 600 thundercat. i have a set of 01 R1 front forks, can i change the stem in the lower tree to make work or does anyone know of a kit i can buy to fit them or any info, if they will not work i'll sell the whole front end for 600.00 us dollars email me at [email protected] my name is shawn