Primary Drive Rear Aluminum Sprocket

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Displaying parts for your 2003 KTM 300 EXC

Primary Drive Rear Aluminum Sprocket
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Primary Drive Rear Aluminum Sprocket

Fits: 2003 KTM 300 EXC

Our Price: $31.00$39.99

MSRP: $49.99 - You save up to $18.99 (38% off)

View Product DetailsSee stock sizes for your machine (Machine Specs)

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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

Primary Drive RDO Chain and Aluminum Sprocket

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.

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
255 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
190
41
18
4
2
Value
4.9 / 5
Durability
4.7 / 5
Fitment
4.9 / 5
Performance
4.9 / 5
Recommend it?
Yes (102)
Value
5 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
Light weight! Looks great!
Light weight and looks great on the CRF!
Good price for the replacement Sprocket.

-m-2017 HONDA CRF450X--
2017 CRF450X
2017 CRF450X
May 22, 2018
Jacó, Puntarenas, CR
Age: 25-44
Purchased
2 months ago
Gender:
Male
Weight:
161 - 190 lbs.
Height:
6'1 - 6'3
Value
5 / 5
Durability
5 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
Rear Sprocket
Very good color, Durability is good, fitment great, performance so far is good.

-m-2016 HONDA CRF250R--
May 18, 2018
Palmyra, MO, US
Age: 65+
Purchased
2 months 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
Primary Drive Rerar Aluminim Sprocket
Great product, fitment was fine. Great price, highly recommend

-m-2009 KAWASAKI KX85--
May 16, 2018
Pittsburgh, PA, US
Age: 25-44
Purchased
1 month ago
Gender:
Male
Weight:
<100 lbs.
Height:
5'1 - 5'3
Value
5 / 5
Durability
5 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
good value
The quality, fit, appearance, wear, and performance are just as good as any other aluminum sprocket, but at a better price. I've been using these on my 450 moto bikes for several years now, and have had no issues or problems with these sprockets.

-m-2017 HONDA CRF450R--
May 14, 2018
Hustisford, WI, US
Purchased
over 3 years ago
Value
4 / 5
Durability
4 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
Great Sprocket
The value of this sprocket keeps me coming back.

-m-2013 KTM 500 EXC--
May 9, 2018
Milwaukee, WI, US
Age: 25-44
Purchased
1 month 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
Ride red
I put this on my 250r and it hasnt disappointed. I went with the anodized red and it looks and performs great.
April 30, 2018
Alpine, UT, US
Purchased
over 2 years ago
Value
5 / 5
Durability
4 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
Drive sprocket
Great sprocket. Light weight. I upsized from a 44 tooth to a 47 tooth sprocket. The bike is more responsive.
April 22, 2018
Apple Valley , CA, US
Purchased
1 month ago
Value
5 / 5
Durability
4 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
Very lightweight
Satisfied with the sprocket very lightweight and fits, looks great

-m-2004 YAMAHA YZ250--
April 14, 2018
Kansas City, MO, US
Age: 25-44
Purchased
4 months ago
Gender:
Male
Weight:
221 - 250 lbs.
Height:
5'4 - 5'6
Value
5 / 5
Durability
4 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
Great sprocket/ probably wouldnt order black again
So far I have been pleased with all of you primary drive products, the only complaint I have (Which is also my doing) is that the black on the sprocket has rubbbed off a significant amount after 2 rides. However, the fitment was perfect, and I do not see any wear on the teeth themselves. If I were to order again I would definitely go with the metal color.

-m-2016 KAWASAKI KX450F--
April 5, 2018
Wixom, MI, US
Age: 25-44
Purchased
4 months ago
Gender:
Male
Weight:
221 - 250 lbs.
Height:
5'4 - 5'6
Value
5 / 5
Durability
5 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
Great transaction
Great product fast delivery good price

-m-2009 KTM 50 SX--
April 4, 2018
East Berne, NY, US
Purchased
2 months ago
Gender:
Male
Weight:
<100 lbs.
Height:
<5'0
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 14 questions Browse 14 questions and 18 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.
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.
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 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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