CBR 600F3 1995 - 1998 CBR 600F3 Forum

lack of power funny sound

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Old 11-20-2009, 11:53 AM
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Default lack of power funny sound

Ok guys, this one has got me good. My bike cranks fine and idles fine. But as soon as I give it gas the exhaust sounds muffled and extrem lack of power. Its something electrical (I think) because I hit a bump and it picked up and went correctly. I've checked all connections there good. I can't find the problem. Any suggessions would help. I put a battery charger on it and it sounded better but not 100 percent. Please help.
 
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Old 11-20-2009, 11:56 AM
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oh yeah and its not my cdi box. I swapped with extra one and still the same.
 
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Old 11-20-2009, 03:57 PM
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how long ago did this problem start? did it start instantly, or did it gradually get like this? when you hit a bump and it started running normally, did it ride normally the rest of your trip, or for a minute, or a few minutes?
 
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Old 11-20-2009, 05:43 PM
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it started about 2 weeks ago. I took it apart checked connection all seems well. when I hit the bump I only went 2 miles or so till I reached my destination. at first it didn't start till 20 minutes into trip. after I took it apart and got it back together it started immediatly. just had carbs done 3 months ago. that's not it. I've changed ignition coils cdi box and nothing. I figure its a short. oh yeah I like your comment about not being a mechanic till drinking gas. it has absolutly no taste.LOL
 
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Old 11-20-2009, 07:26 PM
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Does it do it everytime soon as you roll out the driveway or does it kick in when you have been riding a bit?
 
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Old 11-20-2009, 10:01 PM
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it does it asap. but it didn't use to. use to take awhile
 
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Old 11-20-2009, 10:05 PM
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but it did get worse a bit at a time till I tinkered on it. now it all the time. only when giveing gas. idle sounds super strong
 
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Old 11-21-2009, 06:08 AM
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When I first got my F3 started fine and idled ok.... Give it gas and its a no go..... Cleaned the carbs and I was good to go.... Get them jets cleaned homie...
 
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Old 11-21-2009, 09:22 AM
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I'm going to give that a shot today. never done it before but I do have the repair manuel and I think it tells how. thank you for the help. I will report back.
 
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Old 11-21-2009, 11:22 AM
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dirty jets wouldn't explain the hitting bumps fixes it thing thought... might start with your coil wires and also check your vacuum hoses, if there is a leak the diaphragms won't be functioning properly. easiest/ fastest way to check it is remove your tank and air filter start the bike and rev it, look at all of your needle slides, make sure they all move in a rapid uniform action, if they don't then your main jets aren't opening fully, starving your engine of fuel, Its a lot quicker and easier than cleaning the jets... so start there... good luck!
 


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