I have a 95 xp 720. I just resently replaced the fuel lines and had to replace the oil injector lines cause they were cracked. After that i hooked it up to a hose and ran it for lil while and it was fine. Took it to the lake and ran great for few min then just at top end it started to bogging down and pick back up. Low and mid range was fine, just at w.o.t it kept doing this. There are new plugs in it. It seems to me like it is a fuel delevery problem. Any advise would be appreciated thanks.