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Old 09-25-2013, 11:35 AM   #1
Rubiconnn OP
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CBR F2 vibration

My 92' CBR gets a pretty bad vibration around 4-5k RPM. I'm about to replace the chain and sprockets and the cam chain tensioner. Could this also be caused by poorly tuned carbs? The bike was sitting for about 10 years before I bought it a few months ago. Maybe I should run some seafoam through it?
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Old 09-25-2013, 12:06 PM   #2
rico2072
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Personally, I would take it to someone who is really good at carbs and have them cleaned, adjusted and synchronized. Change the spark plugs, check air filter, change the oil and filter if you haven't yet. Clean the lines going to the carbs or change them. Just to make sure they aren't clogged, check the tensioner, but they do sell an aftermarket manual tensioner that most people put on. I guess the stock one wasn't a very good design at the time.

Any pics of the bike? I use to own a couple F2s and F3s, great bikes!
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Old 09-25-2013, 12:20 PM   #3
Rubiconnn OP
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Yep, I painted it like the Planet Express a few weeks ago because the paint was all messed up. It was originally red/white.

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Old 09-25-2013, 12:22 PM   #4
Jnich77
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Dirty chain
Worn out chain
Improperly adjusted chain
Rear tire not aligned properly

Probably the first two if the bike sat for 10 years.
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Old 09-25-2013, 12:27 PM   #5
kraven
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Quote:
Originally Posted by Rubiconnn View Post
My 92' CBR gets a pretty bad vibration around 4-5k RPM. I'm about to replace the chain and sprockets and the cam chain tensioner. Could this also be caused by poorly tuned carbs? The bike was sitting for about 10 years before I bought it a few months ago. Maybe I should run some seafoam through it?
What Rico said.

Pull and clean the carbs and the whole fuel system.
Change the fuel lines.

Buy new chain and sprockets, and not the cheap shit. Or, if you need to learn a lesson the hard way about buying good parts for your bike, buy the cheap shit.

Probably should change all the vacuum lines too. They're old.

"But Kraven, that sounds hard and expensive."

suck it up, cupcake. You bought a 20+ year old bike that hasn't been maintained. Guess whose turn it is to maintain it?
That's right, Fry. It's your turn.
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