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Knocking Noise

 
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gotcha72
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Joined: 09 Jun 2009
Posts: 21

PostPosted: Wed Mar 31, 2010 12:19 am    Post subject: Knocking Noise Reply with quote

Is anyone familiar with a knocking noise that comes when you accelerate in any gear. As I speed up so does the noise. Its not coming from the engine. Not sure how to expain any other way. Any and all help would be appreciated.
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chicknfeet
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Joined: 04 Jun 2009
Posts: 416
Location: Los Angeles

PostPosted: Wed Mar 31, 2010 1:20 am    Post subject: Reply with quote

bearINGS???
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getmad2009



Joined: 11 Oct 2009
Posts: 668
Location: st colomban

PostPosted: Wed Mar 31, 2010 7:05 am    Post subject: Reply with quote

beeeaaaaaaaaring...........
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loki



Joined: 15 Jun 2009
Posts: 58

PostPosted: Wed Mar 31, 2010 11:44 am    Post subject: Reply with quote

Jack up the rear start rex,put in gear--look for chain,bearing and sprocket noise--and lube the chain its the easiest way!
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gotcha72
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PostPosted: Wed Mar 31, 2010 11:53 am    Post subject: Reply with quote

thanks for the help, is there a way to check the bearing?
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GRex
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Joined: 25 Jul 2009
Posts: 128
Location: Texas

PostPosted: Wed Mar 31, 2010 12:23 pm    Post subject: Reply with quote

Do what Loki said. If there is noise other than chain, then remove the rear axel and check the bearings. It will be obvious if it is bad.
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Sexy_Rex
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Joined: 04 Jun 2009
Posts: 429
Location: Redondo Beach, CA

PostPosted: Wed Mar 31, 2010 12:27 pm    Post subject: Reply with quote

If you can connect an oil pressure guage to the motor, then you can determine if your bearings are bad. If the oil pressure increases/decreases in smooth gradual steps, your bearings are fine, However, if the guage flickers, your bearings are bad. Ignoring the problem could end up with a rod through the side of the engine.

If it is a bearing problem, your crank is probably scored. Solution is a new crank. Bottom line, sounds like you have an EXPEN$IVE problem. Cheap solution in the future is to change the oil regularly and a new oil filter at each change.
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loki



Joined: 15 Jun 2009
Posts: 58

PostPosted: Wed Mar 31, 2010 6:54 pm    Post subject: Reply with quote

Verify its not the engine!!sexy is gonna give you a heart attack!!unfortunately he is right!binding chain,worn sprockets and bearing are usually a good bet though!good luck!!
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getmad2009



Joined: 11 Oct 2009
Posts: 668
Location: st colomban

PostPosted: Wed Mar 31, 2010 7:47 pm    Post subject: Reply with quote

Sexy_Rex wrote:
If you can connect an oil pressure guage to the motor, then you can determine if your bearings are bad. If the oil pressure increases/decreases in smooth gradual steps, your bearings are fine, However, if the guage flickers, your bearings are bad. Ignoring the problem could end up with a rod through the side of the engine.

If it is a bearing problem, your crank is probably scored. Solution is a new crank. Bottom line, sounds like you have an EXPEN$IVE problem. Cheap solution in the future is to change the oil regularly and a new oil filter at each change.





no no no no.........the bearing in the rear wheel......not the motor.....he said it's speed up with the speed of the bike......it's a wheel bearing for sure.......

if it was the motor it will do it even in idle.......
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getmad2009



Joined: 11 Oct 2009
Posts: 668
Location: st colomban

PostPosted: Wed Mar 31, 2010 7:48 pm    Post subject: Reply with quote

60$ fix the problem... Very Happy Very Happy
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fina920
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Joined: 07 Jun 2009
Posts: 84

PostPosted: Wed Mar 31, 2010 8:00 pm    Post subject: clunking Reply with quote

I had the same noise coming from the rear end two years ago and I went right for the bearings. Turned out there was a kink in the chain and each time it went around the sproket it would make a loud clunking noise. I soaked the chain in kerosine and then lubed it up. Noise was gone. Rick was a huge help on this. Try the chain first. Go slow and if you hear the clunk less frequent then you do at high speed I would go with the chain. If not then def the bearings. My two cents.
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twn454
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Joined: 03 Jun 2009
Posts: 133
Location: Fort Washington, Md

PostPosted: Wed Mar 31, 2010 9:11 pm    Post subject: Reply with quote

I got my money on the chain and sprockets!
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murphy
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Joined: 04 Feb 2010
Posts: 52

PostPosted: Wed Mar 31, 2010 11:04 pm    Post subject: Reply with quote

same thing just happened to me i thought it was the chian checked it lubed it tightened it then look at the e-brake, then finally called eric and he said it was the bearings and it was. If you can hear it clunkin while just rollin down a hill(like a driveway in neutral) slow its prolly them.good luck.
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getmad2009



Joined: 11 Oct 2009
Posts: 668
Location: st colomban

PostPosted: Thu Apr 01, 2010 7:02 am    Post subject: Reply with quote

twn454 wrote:
I got my money on the chain and sprockets!


ok i pick the bearing..... Very Happy Very Happy Very Happy Very Happy Very Happy
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