aviator4
07-18-2005, 11:18 AM
Okay guys, this has me really confused.
My 02 400EX has a HotCam stage one in it, and it's always ticked a little, as is expected. But over the past few months of riding, it's become very loud. I've adjusted to valves properly and even contacted HotCams to make sure that haven't changed the lash settings from .03 intake and .05 exhaust: They haven't. I've also replaced the exhaust seals just to make sure that I'm not hearing the exhaust "popping" and mistaking it for something else. I guess it's really bugging me now because I have put my stock pipe back on (temporarily) to go ride the Alpine Loop in Colorado at the end of the month. Is it possible that this could be spark knock? I run 87 octaine fuel instead of the recommended 91, but haven't seen any perormance problems... What else could it be?
Any ideas are greatly appreciated.
My 02 400EX has a HotCam stage one in it, and it's always ticked a little, as is expected. But over the past few months of riding, it's become very loud. I've adjusted to valves properly and even contacted HotCams to make sure that haven't changed the lash settings from .03 intake and .05 exhaust: They haven't. I've also replaced the exhaust seals just to make sure that I'm not hearing the exhaust "popping" and mistaking it for something else. I guess it's really bugging me now because I have put my stock pipe back on (temporarily) to go ride the Alpine Loop in Colorado at the end of the month. Is it possible that this could be spark knock? I run 87 octaine fuel instead of the recommended 91, but haven't seen any perormance problems... What else could it be?
Any ideas are greatly appreciated.