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Primary Drive Rear Aluminum Sprocket

Fits Your MachineDisplaying parts for your 2008 COBRA CX50-SR
Primary Drive Rear Aluminum Sprocket
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Primary Drive Rear Aluminum Sprocket

Fits: 2008 COBRA CX50-SR

102228

Our Price: $35.99$39.99

MSRP: $49.99 - You save up to $14.00 (28% off)

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Additional Videos

Motorcycle and ATV Gearing Guide

Primary Drive Rear Aluminum Sprockets

How To - Renthal Chain and Sprocket Install Instructions

How To - Chain And Sprocket Replacement

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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

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4.6 / 5.0
329 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
251
50
19
5
4
Value
4.8 / 5
Durability
4.6 / 5
Fitment
4.9 / 5
Performance
4.9 / 5
Recommend it?
Yes (172)
No (2)
Value
5 / 5
Durability
5 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
Perfect
Works as should. Easy mount functions fine. No issues yet
April 30, 2020
Kensal, ND, US
Age: 15-24
Purchased
10 months ago
Gender:
Female
Weight:
101 - 130 lbs.
Height:
5'7 - 5'9
Value
4 / 5
Durability
4 / 5
Fitment
4 / 5
Performance
4 / 5
Recommend it?
Yes
Great sprocket
Great sprocket works perfect for my son's yz65. I would recommend this sprocket to anyone that's looking for bang for your buck
April 29, 2020
Athens, PA, US
Purchased
1 month ago
Value
5 / 5
Durability
5 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
Very good
-m-2019 KAWASAKI KX450F--very good sprocket to tone down the top speed of the bike. Trying to tone it down for woods riding and it definitely makes a difference. Idk wat else to type trying to get to 50 character
April 24, 2020
Vinemont , AL, US
Purchased
1 month ago
Weight:
191 - 220 lbs.
Height:
6'1 - 6'3
Value
5 / 5
Durability
5 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
Good quality
Sprocket looks nice and durable can’t went to put it on the buke
April 23, 2020
Vista, CA, US
Age: 25-44
Purchased
1 month ago
Gender:
Male
Weight:
191 - 220 lbs.
Height:
5'10 - 6'0
Value
5 / 5
Durability
5 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
Great Quality/Cost
Bought many different brands of sprockets since 1970. Primary Drive have quality sprockets that wear just as well as other aluminum sprockets. Not heavy, and the cost is excellent.

-m-2019 KAWASAKI KX450F--
April 14, 2020
Morro Bay, CA, US
Age: 45-64
Purchased
2 months ago
Gender:
Male
Weight:
191 - 220 lbs.
Height:
5'7 - 5'9
Value
5 / 5
Durability
5 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
great price, great value
I was a little leary about using primary drive sprockets but this aluminum rear sprocket is on par with all the other major brands I've used for decades...but way less expensive.
March 20, 2020
Oklahoma City, OK, US
Age: 45-64
Purchased
10 months ago
Gender:
Male
Weight:
191 - 220 lbs.
Height:
6'1 - 6'3
Value
5 / 5
Durability
1 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
Great Price !
Fit as designed.
I looked for the least expensive, decent looking rear aluminum Sprocket RM ATV had so I could test out a one tooth larger Sprocket with a lighty “ used” chain, without braking the bank. Results were great and I will continue to use this Sprocket on my bike until it needs replacing.
I can not fairly comment on its durability due to using it on a lightly used chain, after 10 hrs., holding up well.

-m-2019 HUSQVARNA FC 450--
March 9, 2020
Pioneer, CA, US
Age: 45-64
Purchased
3 months ago
Gender:
Male
Weight:
161 - 190 lbs.
Height:
5'10 - 6'0
Value
5 / 5
Durability
5 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
Low signs of wear
The last time I replaced my chains and sprockets, I was adjusting them again after every right for about the first 5-6 rides.This sprocket hasn't shown any signs of wear so far and I have raced the past two weekends now (MX only). I am very impressed with what you get for the money.

-m-2017 HONDA CRF450R--
March 9, 2020
Aylett, VA, US
Age: 15-24
Purchased
1 year ago
Gender:
Male
Weight:
131 - 160 lbs.
Height:
5'10 - 6'0
Value
5 / 5
Durability
5 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
Great Sprocket
I ran about 70 hours of hard off-road riding on this sprocket with hardly any wear. The only reason I replaced the last one was to change the gearing. Great quality at a good price.
March 5, 2020
Fernley, NV, US
Purchased
3 months ago
Value
4 / 5
Durability
4 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
Nice
I would recommend this product it bolted right in and works great, looks great, just the right gearing.
March 5, 2020
Elk, WA, US
Purchased
8 months ago
Show more
Rocky Mountain ATV/MC gift card Each question or answer submitted enters you into a:
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$500 gift card quarterly drawing!
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 26 questions Browse 26 questions and 45 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.
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.
how much weight do you save going aluminum vs steel?
korbin m on Mar 23, 2020
BEST ANSWER: The weight of aluminum is approximately 1/3 the weight of steel.

Hope this helps.
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 [email protected] with pictures of the problems you are having. Once we have this information we will be able to further assist you.
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.
This says it fits a wr250r but the new sprocket has recessed bolt holes the stock sprocket has flat bolts. Do i need new bolts?
Scott F on Apr 16, 2019
BEST ANSWER: It should have recessed bolt holes since they center the bot/sprocket I’m not sure what setup is currently on your wr but get a set of tusk or motion pro sprocket bolts and you will be good
When I increase the size of the rear sprocket do I have to order a longer chain or will the chain that’s recommended for my bike still work?
William j on Jan 27, 2020
BEST ANSWER: Depends how many teeth your going up. Every chain that iv gotten has been about 2 links to long iv always taken 2 links out . It’s always easier and cheaper to chain the front sprocket
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.
I have a 2019 ktm excf 450 six days. It has a 45 tooth rear sprocket. If I change to 48 will I need a new chain? What about 50?
jacob d on Jul 31, 2019
BEST ANSWER: Better to go one tooth smaller on the counter shaft sprocket. Gives about the same gear reduction and is easy to change. No chain length worries either.
I have a 09 yfz 450r what would it do if I went with a 36 tooth in the rear and stock font?
Tyler H on Mar 31, 2019
BEST ANSWER: Not sure what you are trying to do here ?Stock rear is a 49 ! Thirteen teeth smaller is huge , put your YZ in third or fourth gear and start from a dead stop , that is how first gear would feel with a 36 rear . Even with your 450 power you could not pull top gear !
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.
Hello. Do you have aluminium sprocket fit for crf150f or crf230f 428 size? more tan 53t
Federico B on May 29, 2020
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BEST ANSWER: I would be happy to look into this for you. What is the year for your machine?
What is the weight for rear 49 tooth? Will be using on 2008 yz125.
ROBERT H on May 7, 2020
BEST ANSWER: The 49 tooth for your machine weighs about 4 lbs
Can i get a black 47?
Ryan B on Apr 25, 2020
BEST ANSWER: I would be happy to look into this for you. What is the year, make and model for your machine?
Anyone know what the size of center hole diameter? 125mm?? Ethics nowadays are poor. Except mine seems like...
Lee C on Dec 17, 2019
BEST ANSWER: I would be happy to look into this for you. What is the year, make and model for your machine?
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?
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.
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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