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my chain is making a weird noise?
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Posted: 07/03/09
01:03 PM
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when I back my bike up the chain is making this loud awful popping noise, it wasn't doing this before.Is it from having the chain too tight or what? Also my rear sprocket is starting to look like shark fins.any ideas? 
___________________
06 KX250F
Monster Energy
Edition
Pin it!!
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bhorrigan
Addict
| Posts: 5110
| Joined: 11/06
Posted: 07/03/09
01:13 PM
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Yes, they are worn out and need replacing. Your chain is so stretched out now that it is out of tolerance and it has caused excessive wear on your sprockets. Time for some new ones.
Bill H.
Temperance, Mi
2000 CR250R
1991 YZ125
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daggit
Addict
| Posts: 4803
| Joined: 10/08
Posted: 07/03/09
07:02 PM
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Make sure you Change both sprockets and chain at the same time.
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"Every time I start thinking the world is all bad, then I start seeing some people out there having fun on motorcycles. It makes me take another look." -Steve McQueen
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yzwoods
Addict
| Posts: 18457
| Joined: 05/06
Posted: 07/03/09
07:09 PM
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When you back up, that pop you hear is your chain slipping off the worn-out back sprocket. Your chain is probably also stretched, and your front at this point would be no better. Gee, what to do? Let's change our sprockets and chain before you end up ruining your transmission, which is a very good possibility if this keeps happening, or you're going to be stuck in the woods.
I mean this in the nicest way, but good grief, that shark-fin sprocket that you're talking about is a wornover sprocket waiting for your chain to let loose and do more damage. Change sprockets and chain ASAP. Just my opinion. YZWoods
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DIABETES SUX!
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Posted: 07/03/09
07:11 PM
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when my chain got stretched out on my old bike i would just cut off some links. But you should replace both sprockets and get a good O ring chain that will last a long time!
My ride -2002 KX 125
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DT_Jason
Enthusiast
| Posts: 445
| Joined: 05/09
Posted: 07/04/09
03:33 AM
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What everyone said is correct but what is actually making the sound is the teeth on sprocket being bent over a bit and they actually hold onto the chain instead of letting it just slip over the last tooth . When it creates to much tension on the chaina and the tooth cant hold onto the chain anymore then it "pops" off the tooth. You probably don't hear the noise when you push the bike forwards because the teeth are bent so they only catch when pushing the bike backwards.
If you buy cheap chains and sprockets expect to be changing them every 2-3 weeks . Like they said...buy a decent quality O-ring chain and decent quality sprockets and ride worry free and end up saving money in the end!
1978 Yamaha 175 MX
Northern Ontario
Canada
31 yrs young
WHEELIES!
Yaaaayyyyyy!
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Posted: 07/04/09
09:39 PM
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are renthal sprockets a good brand to go with?
___________________
06 KX250F
Monster Energy
Edition
Pin it!!
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Posted: 07/04/09
09:44 PM
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I have a question i forgot the how tight your chain is suppose to be rule and 1 other thing is how can you tell when sprokets are to worn basically could msomeone if they have the time give me the run up on sprockets and chain plz if you dont mind thank you and have a great 4th!!!!!!!!!!
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Autismspeaks.org check it out
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life in the fast rut!!!!
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my rides- 2008 yz250f fully modified, use to be j-laws bike
&
IT400 1979 yamaha!!!
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Home: SO CAL
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DT_Jason
Enthusiast
| Posts: 445
| Joined: 05/09
Posted: 07/05/09
02:56 AM
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About 1/2 to 3/4 play up and down for the chain. Sprockets are worn when the teeth are pointy and/or lean over.
1978 Yamaha 175 MX
Northern Ontario
Canada
31 yrs young
WHEELIES!
Yaaaayyyyyy!
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pojp58
Addict
| Posts: 6212
| Joined: 04/07
Posted: 07/05/09
05:00 AM
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 yz250f4ever:
I have a question i forgot the how tight your chain is suppose to be rule and 1 other thing is how can you tell when sprokets are to worn basically could msomeone if they have the time give me the run up on sprockets and chain plz if you dont mind thank you and have a great 4th!!!!!!!!!!
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 I love this dirt stuff.
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pojp58
Addict
| Posts: 6212
| Joined: 04/07
Posted: 07/05/09
05:05 AM
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Some of them like my sons 04 yz250f says 1.6 to 2.0.
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I love this dirt stuff.
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Posted: 07/05/09
07:02 AM
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hey pjop58 plz can i get your name i am alex. dude you totally awnsered my question thanks you very much thats all i need to know right there. AND also thank you DT i am pretty sure your name is jason !!lol!! dont get mad if i am wrong but thanks to you to!!!! hope everyone had a great 4th!!!!!!
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Autismspeaks.org check it out
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life in the fast rut!!!!
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my rides- 2008 yz250f fully modified, use to be j-laws bike
&
IT400 1979 yamaha!!!
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Home: SO CAL
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pojp58
Addict
| Posts: 6212
| Joined: 04/07
Posted: 07/05/09
07:20 AM
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Names pop.lol Glad we could help.
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I love this dirt stuff.
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