Primary Drive Rear Aluminum Sprocket

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Primary Drive Rear Aluminum Sprocket
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Primary Drive Rear Aluminum Sprocket

Our Price: $24.99$39.99

MSRP: $49.99 - You save up to $25.00 (50% off)

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Additional Videos

Motorcycle and ATV Gearing Guide

Primary Drive Rear Aluminum Sprockets

RM YouTube Channel

Details

  • Primary Drive rear aluminum sprockets are made from a high-strength aircraft grade aluminum alloy.
  • Anodized and heat treated for extended wear.
  • Self cleaning grooves prevent mud build up to prolong sprocket and chain life.
  • CNC machined to match original equipment exactly for a perfect fit.
  • 7075 T6 Anodized Aluminum.
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

Primary Drive Rear Aluminum Sprocket Reviews

Each review submitted enters you into a
$100 gift card monthly drawing and a
$500 gift card quarterly drawing!
 
4.6 / 5.0
277 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
207
45
19
4
2
Value
4.8 / 5
Durability
4.6 / 5
Fitment
4.9 / 5
Performance
4.9 / 5
Recommend it?
Yes (123)
Value
5 / 5
Durability
5 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
Great sprockets! I will continue using them!
I've had this primary drive sprocket on for 6 months. It looks great and I am happy with the quality! I will continue using them for sure!
Great looking sprocket!
Great looking sprocket!
December 4, 2018
Kearney, NE, US
Age: 25-44
Purchased
9 months ago
Gender:
Male
Weight:
131 - 160 lbs.
Height:
5'7 - 5'9
Value
5 / 5
Durability
3 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
Longevity?
I'm not sure how long it will last, but it is working fine for now and it looks good
November 15, 2018
Berkeley Springs, WV, US
Purchased
2 months ago
Value
5 / 5
Durability
5 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
Love the performance and look of this on my Kawi.
Installed this 52 tooth, from the factory 50, on my 15 KX 250f
Love the low end performance of this on the more technical stuff in the Rocky Mountains, I love smooth this sprocket feels, will buy again when this one wears.

-m-2015 KAWASAKI KX250F--
Sharp looking!!!
Sharp looking!!!
November 11, 2018
Salida , CO, US
Age: 25-44
Purchased
1 month ago
Gender:
Male
Weight:
131 - 160 lbs.
Height:
5'7 - 5'9
Value
5 / 5
Durability
5 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
Great sprockets that hold up well and for a great price!
November 6, 2018
Fallston, MD, US
Age: 25-44
Purchased
6 months ago
Gender:
Male
Weight:
161 - 190 lbs.
Height:
6'1 - 6'3
Value
5 / 5
Durability
5 / 5
Fitment
4 / 5
Performance
5 / 5
Recommend it?
Yes
Great price
Looks very comparable to a renthal and made in the USA.
October 29, 2018
Snohomish, WA, US
Purchased
2 months ago
Value
5 / 5
Durability
5 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
2012 Cobra 50
Worked at advertised. Wouldn't hesitate to purchase again.
October 23, 2018
Jacksonville, FL, US
Purchased
1 month ago
Value
5 / 5
Durability
5 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
Our rear sprocket of choice
These sprockets are a great value! Strong and durable with a couple colors to choose from

-m-2014 KTM 65 SX--
October 8, 2018
Stafford, CT, US
Age: 25-44
Purchased
2 months ago
Gender:
Male
Weight:
<100 lbs.
Value
4 / 5
Durability
4 / 5
Fitment
4 / 5
Performance
4 / 5
Recommend it?
Yes
Great product at a really good price....
Awesome sprocket, looks great on the bike will definitely buy another.

-m-2016 KAWASAKI KX450F--
Bling,bling
Bling,bling
October 8, 2018
Glendale, AZ, US
Age: 45-64
Purchased
2 months ago
Gender:
Male
Weight:
221 - 250 lbs.
Height:
6'4 - 6'6
Value
5 / 5
Durability
5 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
Worth it
Lighter than stock cleaner and let's not forget gives the bike a better look went on very easy

-m-2015 KTM 250 SX-F--
September 27, 2018
Clarksville , TN, US
Age: 15-24
Purchased
3 months ago
Gender:
Male
Weight:
161 - 190 lbs.
Height:
5'7 - 5'9
Value
5 / 5
Durability
5 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
Primary Drive Sprockets
This is my second Primary rear drive sprocket I have bought from RM. Quality, Fit, Performance is a A+ I would like to see RM take their Aluminum rear sprockets to the next level. That level would be to make them as light as possible. When I replace a part I want it weigh less not more!!! There is a market for light weight parts. Thanks RM !!! You guys and gals ROCK !!!!

-m-2018 HUSQVARNA FC 350--
September 26, 2018
Lakeside, CA, US
Age: 45-64
Purchased
3 months ago
Gender:
Male
Weight:
131 - 160 lbs.
Height:
5'4 - 5'6
Each question or answer submitted enters you into a:
$100 gift card monthly drawing and a
$500 gift card quarterly drawing!
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 17 questions Browse 17 questions and 25 answers
what size of chain does it take?
Tim D on Apr 23, 2017
BEST ANSWER: The size chain will depend on your machine and sprocket sizes. If you could tell me the make, model, and year of your machine along with your front and rear sprocket sizes I can tell you what size chain you will need.
I have a 2013 KTM 350exc. Have 13/48 on now with stock chain. Chain good. Want 50 on rear for more pull. Will stock size work? OEM is 14/45. Thanks.
Donovan M on Jul 10, 2018
BEST ANSWER: I would recommend a new chain with more links. For this gearing, it is recommended to add 4 links to the stock size. What I would do personally is buy a chain longer that is 4+ links longer than stock and then cut it to the length you would like.
If I'm going from a stock14" rear wheel to a 16" rear wheel do I need to change my rear sprocket to accommodate the larger wheel size?
A shopper on Apr 20, 2018
BEST ANSWER: depends on if the type of bike and if the bike has the horsepower to handle it. If it doesn't have the horsepower then I recommend going up in teeth to accommodate the larger wheel. the larger sprocket will help compensate for the larger wheel.
Is the #102-228-0161 sprocket a 420 chain size or 428 ?
Michael W on Feb 8, 2018
BEST ANSWER: Hello,
The sprocket is a 520 chain size.
My stock gearing is 13/50 if I got a 49 tooth sprocket would it help my pull more out of my gears ? And second would I have to do anything to my chain or could I keep it the same just maybe have it adjusted tighter on the blocks?
Dyllon B on Dec 30, 2017
BEST ANSWER: A smaller rear/larger front sprocket will give you more top end speed, if your engine has the power for it. Conversely, using a larger rear/smaller front sprocket would give you more acceleration at the expense of top end.
As for your chain, for a single tooth on the rear, you can probably get it tight enough with the adjusters. However, if you have significant time on it, you should replace it along with your new rear sprocket and a new front sprocket. A used chain will have stretched to the point the rollers will not fit the new sprocket teeth properly. You will wear out your new sprocket very quickly.
Anybody else have trouble with this sprocket fitting a Cobra CX50-Sr? I purchased the sprocket under OEM and the bolt holes are metric and I had to tap them to fit..
A shopper on Sep 28, 2017
BEST ANSWER: I have not used my Primary Drive sprockets on a Cobra, I have had a few sets for my KTMs over the years & my friends too ,and we had absolutely no fitment issues on front or rear sprockets. I am also using stock KTM bolts also.Make sure (if the bike was bought used) that the bolts are OEM certified & tapered correctly & you have no oblong holes on wheel hub from loose or worn/incorrect fasteners.
Will this work on a 2008 ktm 250xcf-w?
Michael S on Sep 29, 2018
BEST ANSWER: To see if this part will fit your machine please enter the make, model, and year into our "Choose a vehicle" drop down boxes found above the product image. If your machine is not listed, we may not carry the right item for your application. If you have a 2019 year model but don't see your machine as an option, please contact a tech via Live Chat or call us at 1-800-336-5437 for assistance.
I'm changing my rear sprocket to a 49 from a 43 and front from 13 to 14 on a wr250R. Ca I use my stock chain?
Alex S on May 30, 2018
BEST ANSWER: No because you will need 6 more links longer than stock.
Will 51 tooth become available in black again soon?
marc h on May 14, 2018
BEST ANSWER: I would be happy to check. What is the make, model, and year this would go on?
2005 400ex, Doesnt have enough inside diameter cut out to mount on the back side like the stock sprocket..if i mount to the front side the sprocket alignment is way off. Looks like I am out 40$ unless someone has a suggestion?
robert d on May 8, 2018
BEST ANSWER: Please call us at 1-800-336-5437 or email us at sales@rockymountainatv.com with pictures of the problems you are having. Once we have this information we will be able to further assist you.
Will it fit on a 2017 ssr 189?
A shopper on Dec 5, 2017
BEST ANSWER: To see if this part will fit your machine please enter the make, model, and year into our "Choose a vehicle" drop down boxes found above the product image. If your machine is not listed, we may not carry the right item for your application. If you have a 2018 year model but don't see your machine as an option, please contact a tech via Live Chat or call us at 1-800-336-5437 for assistance.
Where are these sprockets made?
MICHAEL O on Oct 25, 2017
BEST ANSWER: they are made in Taiwan.
What is the stock tooth count for the rear sprocket on a 2008 KTM 85sx?
Danny H on Oct 16, 2017
BEST ANSWER: The stock rear sprocket size is a 46 tooth.
How do I get this in blue for my Crf250R? Will the Yamaha sprocket fit on 2013?
Jason B on Sep 8, 2017
BEST ANSWER: I am not sure that the yamaha sprocket will work. we only sell the most popular colors for each bike.
Why is Red not available for the Betas???
Kelly C on May 28, 2017
BEST ANSWER: Unfortunately, this color is not available for us to get for your machine. However, I will forward along your comment for consideration.
Will this work on a 1997 YZ 125?
Stevan L on May 23, 2017
BEST ANSWER: To see if this part will fit your machine please enter the make, model, and year into our "Choose a vehicle" drop down boxes found above the product image. If your machine is not listed, we may not carry the right item for your application. If you have a 2017 year model but don't see your machine as an option, please contact a tech via Live Chat or call us at 1-800-336-5437 for assistance.
Why is this only available in 50 or less for a YZ250? I want to go up a tooth. Ridiculous.
Bob W on Dec 30, 2017
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