The bike "stumbles" at 4000-4500rpm
My KLR seems to "fall on it's face" at 4-4.5K for about 2-3 secs, anybody have an idea if this sounds like a rich or lean problem, the bike start fine w/o a choke.
I checked the plug wire and it looks fine, pulled the tank and checked the plug and it looks good and black.
I checked all the lines going to and from the carb and they all "look" good.
I cleaned the k&N air filter, changed the oil.
I just added a fuel additive.
I even installed a (Supertrapp) pipe and the problem persists.
Any other suggestions before I take it to the shop????