I'm wanting to change the stock primary and secondary clutch springs on my 02 650 prairie-26" swamp foxes, dyna tek cdi, KN air filter. I'm thinking of epi pink primary and epi black secondary. I don't want a high stall because I do alot of slow steep climbing and rock climbing. Has any one ever used a stock 700 primary in a 650. What about using the 700s belt? Any input would help.