Track Day Rider
Join Date: May 2012
Location: Mishawaka/South Bend IN
Top End Power Loss
Just picked up an 07 all stock except dual Yoshi bolt-ons. It is very weak in the upper rpms. From 8-9k rpms and up it's flat (bogs) It will keep reving to redline just not much power. From 1k to 8k rpms it runs good and starts easy. No fi or any other lights.
I checked the basics, plugs, air filter, all 4 cylinders seem to be firing by feeling the header and the exhaust valve looks like it's working. Also no power commander and its been down before but doesn't look like it was too hard.
Anyone else have a similar issue or know of some other things to check?