I was just wondering, how often does everyone replace their chain? My friend has had his 300EX for about 1 to a 1 1/2 years and I have had mine for about 6 months. My friend can pretty much pull his chain nearly off the teeth of the rear sprocket. I can pull it some but not near that much. I am sure he needs a new chain. Do you have to get a new front sprocket when you get a new chain? About how much do new chains and front sprockets run $? Do I need a new chain too since I can pull it off a tad? Please enlighten me on the subject.


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i know nearly nothing about 300Ex's but im pretty sure its got a way you can tighten the chain. Try that , tell your buddy to, cuase chains stretch a little, thats what i did and its fine now .. i think its something like and inch and a half of play up and down is the right tension, but im not positive

Chris Jack
87 lt250r3

 

What you got to do is loosen the bolts on the axle carrier and the turn it with a pipe wrench and it will tighten it. You are suppose to have about an inch to an inch and a half of play.

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300ex... The Big Red Machine

 

speedex,
Take hold of your chain at the center of your rear sprocket & pull it back. If you can see 1/2 of a tooth,trash it now! Further use will cause both sprockets to become hooked & needing replacement, quite expensive. Inspect both sprockets to see if they have developed a hooked shape at the tip of the tooth. If not they're ok. I suspect your friend's sprockets are totally trashed if his chain is stretched as badly as you say. You'll be doing him a big favor by telling him what you've learned. By the way, no amount of adjusting will offset a stretched, worn out chain... you can still pull it off as before. The links simply are stretched beyond adjustment.
I use an RK chain just as an example of one good one & they're are others.

THE AZ HARD PACKER,
calmiller@kachina.net



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Does anyone know how many teeth go on a front and rear sprocket of a 300ex? Also, how much do new chains cost about?



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speedyEX,
If you have an owner's manual, the sprocket sizes should be in it under specifications. Look for the section on transmissions.It hopefully lists secondary Reduction ratio with a number such as 40/13 which is the rear & front, or countershaft, sprocket sizes fora Warrior.
My RK chain o-ring chain was about $70, to the best of my recollection. It depends on the number of links as well as the brand of chain. Tsubaki is a decent chain, also.
Keep in mind that your chain is the most stressed, and often the least maintained part on you bike, so a cheap chain is a false economy.

THE AZ HARD PACKER,
calmiller@kachina.net



[This message has been edited by hot_shoe_cv (edited 10-15-1999).]