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Discussion Starter #1
whats up guys im new to street bikes just picked up an 08 cbr 600 in may put about 2500 miles on it and have started to notce a loss of power or clutch slip in 1 and 2 like if i pull away from a stop kinda slow then wax it the bike just sounds storng but doest really feal like its pulling at all now like a week later i have notced on the high way in 5 or 5 it doesnt pull at all trying to pass i have to down shift when before i could just give it some gass and the exhust just doesnt seem as load any more any ideas on things to check common prblems like i said im new to bikes but im not new to motors or cars im a mechaic i work for subaru so i have a idea im just not sure where to start my thoughts are something in the exhuast killing my top end power also maybe bad gass but it doest miss its smooth is there timming contorl on these bikes like with a knock sensor that say i had less then par gass i would loose power also what about the cat do they have any problems and whats this valve in the ehuast i hear about hahah im just lost cuz the bike is new i dont want to have to deal with this so any help would be great
 

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please retype your message with breaks so its not one huge sentence.

its hard to follow



bad gas could be a problem but unlikely unless its sitting aroud for a year or two.

the exhaust valve is there for noise emissions at idle. (some people will tell you it is for low end torque but i actually gained low end by disabling it when i put it on the dyno) At highway speed it is fully open and not affecting anything.

here is a question, do you rev your bike at idle.

i have seen a lot of people foul plugs very fast by revving the engine at idle.
 

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Discussion Starter #3
ahah yea sorry about that i typed the post really fast any way i dont rev the bike at idle at all is there any way to test the ex valve ?
 

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Try something as simple as changing the oil. Or are you finally just getting used to the bike and it doesnt feel as fast as it used to?
 

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Discussion Starter #5
did that it helped smooth out the clutch but still lacks power and its really not in my head road with some orther 600s and was getting pulled bad so somthing is up
 
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