13 tooth front sprocket - Polaris Riders


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Old 07-07-2006, 01:20 AM   #1 (permalink)
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Default 13 tooth front sprocket

Hey all, I am about to purchase a 13 tooth front sprocket from a member on here and I am just curious about the gearing change that it will produce. Is it really going to give me that extra snap of acceleration coming out of the corners? I ride a lot of mx, and stock gearing is not always the best. Going down one in the front will give me more bottom end and quicker acceleration right?? My mods are just a FMF Titanium 4 slip on, drop in k&n filter (until I get it jetted and put on the clamp on with outerwear), and Razr 2's in the rear and a few other bolt on's. I am not worried about losing a little bit of top end in exchange for some more low end grunt. I am just curious if anyone else with a 13 tooth front feels about their gearing. What will be the pros and cons of this?? Sorry for the long ass thread, just a newbie trying to see what it will produce. Thanks to all in advance.
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Old 07-07-2006, 01:30 AM   #2 (permalink)
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A 13 tooth will give you the most SOTP gains.....besides NOS or a BBK.
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Old 07-07-2006, 02:35 AM   #3 (permalink)
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I put a 40 tooth rear on mine, which is the same gearing wise, and I will never go back to stock. It's a definite improvement and for the cost, you can't go wrong. You might want to do a search on the 13 tooth sprocket. I remember there was talk of them wearing out the chain slider prematurely. It only applies to certain years, I think. That is why I went with 40 rear.But the rears are a lot more $.
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Old 07-07-2006, 10:44 AM   #4 (permalink)
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good mod, thats what I run. And unless you're running high speed desert racing or something then the top speed will be fine.
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Old 07-07-2006, 10:50 AM   #5 (permalink)
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i also have a 13 tooth front sprocket and theni liked it so much i got a 39 tooth rear sprocket. can you say 3rd gear wheelies at any speed. i am addicted to the low gearing i am now going to try a 42 tooth rear sprocket. if you ride mx you will love it. don't forget rockey mountain atv has a 13 tooth sprocket online for $7.99.
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Old 07-07-2006, 10:54 AM   #6 (permalink)
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thanks for the help everyone. I just ordered one from rockymtn and will be here next week. I have one more question though.. Will I be able to use the stock hardware(snap ring, etc??) for the 13 tooth front?? IT says that I can in rocky mtn but I just want to be sure. Thanks again in advance..
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Old 07-07-2006, 11:01 AM   #7 (permalink)
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i don't know about the one from rocky mountain. i put mine on and had to modify the 2005 clip for the holes to line up. i bought mine from someone on here not rocky mountain so i am not sure. some guys on here have just bought a c clip to slide in the slot where the stock clip went. hopefully one of these will work for you.
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Old 07-07-2006, 12:44 PM   #8 (permalink)
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The holes might not line up but as long as you have the C clip to lock everything in then you'll be fine.
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Old 07-07-2006, 12:53 PM   #9 (permalink)
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Just be aware that the 13t will wear your swingarm slide faster. Since you ride MX alot, I would suggest going to a different air filter set up, make sure you maintain some intake tract length though, or you won't ever be able to get it jetted correctly.That mod alone will increase bottom end substantially with your slip on. Since you are running a razr 2 tire, I assume that it is a 20" tire. Going to an 18" tire like most MX guys run will also lower you final gearing and give the added benefit of lowering your overall ride height. Going to the 18" rear tires is about the same gearing wise as switching to a 13t front sprocket.
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Old 07-07-2006, 08:53 PM   #10 (permalink)
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I just added a 13T last week and it made a considerable difference. Nothing so cheap can do so much. I paid $20 from Rath and it came with the correct retainer clip. I didn't even open the master link. I loostened the chain, wiggled the old one off and the new one on. Then I retensioned the chain.

I rode it in the woods. Much faster out of corners at to rev out. I am very happy with it.
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