Hey guys hows it going. I am still looking for all the info on these pipes I can get. I bought a used set for my xcr 600 and can't seem to bring my rpm's below 9500 at full throttle now. Is this normal or am I going to wreck my motor. The guy gave me 10mr weights with the pipes but they didn't seen to help much. Any help on clutching and jetting would be greatly appreciated. Thanks in advance!