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Discussion Starter · #1 ·
Rob this is an awesome forum!!! Im about to order a 13/39 sprocket combo from...i dont know who yet. But anyways, will i need a new chain, or will the factory chain fit? I was thinking maybe i should just get a new chain too but not if i would not have to. How much is everyone paying for the sidewinder kits? Thanks alot everyone.
 

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13/39 will work without having to get a new chain, 13 is smaller, 39 is larger, overall, its close to the same length so you should have plenty of adjustment left - james
 

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Two popular choices for sprockets would be Sidewinder and Sprocket specialists. As far as Sidewinder goes, check out their website.

http://www.sidewindersprockets.com/

Scott
 

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The stock chain will work fine for the 13/39 setup. It's a tight fit but it works. I don't think you can go 14/39 on the stock chain, though (in case you were curious).

Rob
 

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Discussion Starter · #5 ·
Oh really...i was going to keep the 39 on all the time and use the 14 when im doing my normal riding, and the 13 when i go to the dunes. Guess i will need another chain. thanks guys
 

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Switch the back sprocket instead of the front one ,leave that one 13 tooth.Switch between 38 and 39.
 

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i have run 14/40 without having to change chains, it is tight, but it worked. therefore, the 14/39 should also work and the 13/39 should be no problem. right now i leave the 40 on the rear and change from 13 to 14 in front for different terrain and this is all with the stock chain, but 13/40 is really to low geared and i may go to 38 or 39 - james
 

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How are you guys fitting all these big sprockets on with the stock chain? I could BARELY get the 13 back on the front after putting the 39 on the rear.

I'm starting to wonder if it's you guys (no offense intended) who are complaining about Sprocket Specialists sprockets not wearing well because your chains are too tight? Or am I missing something?

Rob
 

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Thats why I run 13 38 or 13 39
 

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I don't know how many have complained about Sprocket Specialists, but I am one. I also know how to tighten my chain, and how tight it needs to be run. If anything, it's a little loose. So, I guess from my perspective, you are missing something.

I've had NO problem with my sidewinder sprocket. I know the hi tool steel is better and longer lasting than the aluminum one from SS. Maybe I just happened to get the only two bad ones they ever sold. But I won't make that mistake again. If you've had good luck with them, great. I haven't.

p.s. no offense taken
 

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i can run the 14/40 and adjust it so that it is very loose. my best guess is that not all bikes have the same measurements and that some chains stretch more than others - james
 

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Discussion Starter · #12 ·
Anybody know how much top speed wil be affected with a 14/39 combo and a 13/30 combo? And is anybody having any troubles keeping the front end down when you are lowering the gearing?
 

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ive actually made a chart showing how fast top speed will be with different gear ratios if your motor will pull all the way to the rev limiter in 5th. this puts stock gearing at 82 mph, the 14/39 combo at 78 mph, and the 13/39 at 72 mph. keep in mind this is only if you can pull all the way to the rev limiter anyone who wants this email me and i will send the chart to you, it is in word format, the chart also shows all the different gear ratios that the gear combos give you - james
 
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