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Everything Dirt Bike
General Dirt Bike
Sprockets and chains
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<blockquote data-quote="jojofuller" data-source="post: 160022" data-attributes="member: 1622"><p>I'm sure the answer to this is "it is in the manual"(I'm looking for one.), but none the less...</p><p></p><p>I have to change the front sprocket and chain on my 2003 Suzuki RM125. My investigation has led me to stock specs on the front as a 12 spoke and the rear as a 49 with a 114 link chain. My bike has an 11 spoke sprocket on it. It also has 3 broken teeth on it. The rear sprocket is a 51. According to a calculator I found online, the current set up produces an approximate 17% torque curve and an opposite -17% top speed difference when compared to the stock set up. I think that this may be the reason for the broken teeth...too much torque. Or could be sloppy chain. (Opinions?)</p><p></p><p></p><p>So I am going to replace with a 12 spoke sprocket and will leave the rear 51. If I install this set up, the calculator indicates I will have an approximate 9.5% torque curve and opposite top speed. The calculator also says I will need a 116 link chain. Does all of that sound right?</p></blockquote><p></p>
[QUOTE="jojofuller, post: 160022, member: 1622"] I'm sure the answer to this is "it is in the manual"(I'm looking for one.), but none the less... I have to change the front sprocket and chain on my 2003 Suzuki RM125. My investigation has led me to stock specs on the front as a 12 spoke and the rear as a 49 with a 114 link chain. My bike has an 11 spoke sprocket on it. It also has 3 broken teeth on it. The rear sprocket is a 51. According to a calculator I found online, the current set up produces an approximate 17% torque curve and an opposite -17% top speed difference when compared to the stock set up. I think that this may be the reason for the broken teeth...too much torque. Or could be sloppy chain. (Opinions?) So I am going to replace with a 12 spoke sprocket and will leave the rear 51. If I install this set up, the calculator indicates I will have an approximate 9.5% torque curve and opposite top speed. The calculator also says I will need a 116 link chain. Does all of that sound right? [/QUOTE]
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