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Primary Drive Rear Steel Sprocket

Fits Your MachineDisplaying parts for your 1990 KAWASAKI KX250
Primary Drive Rear Steel Sprocket
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Primary Drive Rear Steel Sprocket

Fits: 1990 KAWASAKI KX250

102235

Our Price: $12.99$19.99

MSRP: $19.99 - $32.95 - You save up to $12.96 (39% off)

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Details

    Primary Drive Rear Steel Sprockets are made to meet or exceed O.E.M. specifications. Made of high-grade hardened steel, these sprockets are made to be durable and offer long wear. Lightening holes add to the aesthetic appeal while reducing weight. Primary Drive Rear Steel Sprockets are manufactured with precision for a perfect fit. Whether you ride a motorcycle or ATV, Primary Drive is sure to offer the best value in sprockets.
  • Durable replacement steel rear sprocket for motorcycles and ATV's.
  • Designed to O.E.M. specs using a high-grade hardened steel.
  • Manufactured with precision for a perfect fit.
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

Primary Drive Rear Steel Sprocket Reviews

Rocky Mountain ATV/MC gift card Each review submitted enters you into a
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WRITE A REVIEW
4.7 / 5.0
941 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
738
158
27
11
7
Value
4.9 / 5
Durability
4.7 / 5
Fitment
4.9 / 5
Performance
4.8 / 5
Recommend it?
Yes (300)
No (6)
Value
5 / 5
Durability
5 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
Great sprocket first the price.
Decided to re-gear my WR250F for trail riding and selected this sprocket. I also purchased some new bolts for this install. This is a great product for the price.

-m-2009 YAMAHA WR250F--
May 9, 2020
Hickory, NC, US
Purchased
3 months ago
Value
5 / 5
Durability
5 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
good as always
Have used these on all my bikes. Great value and last a long time.
May 4, 2020
Marysville, WA, US
Purchased
over 3 years ago
Value
5 / 5
Durability
5 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
Very tough
Great rear sprocket I have currently 12 hours on this one and you can barley even tell it’s been used
May 2, 2020
Somerset, KY, US
Age: 25-44
Purchased
3 months ago
Gender:
Male
Weight:
191 - 220 lbs.
Height:
5'10 - 6'0
Value
5 / 5
Durability
4 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
Solid product at fair price.
Great value. Get them as part of primary drive sprocket plus chain set. Small weight penalty for steel, but who can really tell when riding? Usually easily last 50+ hours trail riding.

-m-2017 KTM 250 XC--
April 30, 2020
Owings Mills, MD, US
Age: 65+
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
Fits perfect!!
I purchased this sprocket for my TTR125. It fit perfectly. I was happy to see Rocky Mountain lists the stock info about the bike. That was very helpful when making this purchase.
April 29, 2020
Trafford , PA, US
Purchased
1 month ago
Value
5 / 5
Durability
5 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
Good quality
Works as supposed to and good quality. Highly recommend
April 29, 2020
Albuquerque, NM, US
Age: 45-64
Purchased
1 month ago
Gender:
Male
Value
5 / 5
Durability
5 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
Great
Just the right fit, mounted on without any trouble
April 29, 2020
Port Blandford , NL, CA
Age: 25-44
Purchased
1 month ago
Gender:
Female
Value
5 / 5
Durability
5 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
Good Quality
Nice sprocket that and is lightweight for a steel sprocket.

-m-2006 KAWASAKI KDX200--
April 28, 2020
Charleston, SC, US
Age: 25-44
Purchased
1 month 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
A Solid Product
A nice and heavy sprocket. Well built and perfect for the kid's bike. Will use again.
April 27, 2020
West Jordan, UT, US
Value
5 / 5
Durability
5 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
Great value.
Works great, too bad chain is junk!

-m-2008 KTM 300 XC--
April 27, 2020
Abbotsford, BC, CA
Age: 45-64
Purchased
1 year ago
Gender:
Male
Weight:
161 - 190 lbs.
Height:
5'10 - 6'0
Show more
Rocky Mountain ATV/MC gift card 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 28 questions Browse 28 questions and 67 answers
Where are these made?
A shopper on Aug 22, 2018
BEST ANSWER: in a sprocket factory. :)
What color will this sprocket be for a 2013 crf 250r?
Timon K on Oct 18, 2017
BEST ANSWER: silver.
What is the actual weight of the sprocket? Or the average weight?
Johnathon B on Sep 3, 2016
BEST ANSWER: The rear steel sprocket could weight anywhere from 1.5lbs to 3 lbs depending on the machine and size of the sprocket.
Will this rust?
Aaron P on Sep 17, 2017
BEST ANSWER: I only run these because I ride a lot of sand, and aluminum sprockets get worn out too fast in sand. It will surface rust but there will not be enough rust where you will have to worry about this. The paint holds up good. It'll rust on the teeth that touch the sprocket.
In what things are steel sprockets better from aluminum??
A shopper on Dec 10, 2019
BEST ANSWER: I run steel sprockets on my Honda TRX450r and the reason for that is because the aluminum sprockets tend to "bend" or "curl" quicker on a 4 stroke machine quicker then the steel sprockets. Hope this helps! Safe riding!
I currently run a 13 front and 48 rear sprocket on a YZ250F. I find I am a little high geared for the type of riding I do. I am wondering if I should go with a 50, 51, or 52 tooth rear sprocket?
Brian W on May 26, 2017
BEST ANSWER: Not sure what the stock gearing is for that bike butgeneral rule of thumb for gearing is if you want to go faster than you would change to a bigger front sprocket and a smaller rear sprocket, if you want more bottom end pull then use the stock gear in the front and go bigger on the rear. Even 1 extra tooth will make a big difference. I run 14/50 on my CR500 and 13/50 on my CRF450 and it's a perfect balance between speed and torque
Is this sprocket a 520 pitch?
A shopper on Aug 15, 2017
BEST ANSWER: These are machine specific. they vary from machine to machine. if you select your machine it will be what ever the machine is.
What bolts should I get to mount this on my 2009 wr450f? Aka what are the stock bolt size?
Corey T on Apr 16, 2019
BEST ANSWER: Corey, I used the stock bolts. I looked them up on this web site and found these. part # 1096010001
https://www.rockymountainatvmc.com/parts/primary-drive-sprocket-bolt-and-nut-kit-p?v=8256
im going to be turning a 2005 KLX 125 into a dualsport what gearing should i go with for on road use?
Myles H on Nov 16, 2017
BEST ANSWER: In my opinion, based on a couple bikes I have messed with sprocket size changes, plus one tooth front (or minus 3 in rear) is a great starting point. If you want more speed, go more. It you find yourself stalling all the time, or tearing up clutches because your torque isn't where you need it to be, go back the other direction. Being that your bike is only 125cc 4t, I see you running into the torque problem very quickly. The same problem exists with the 2t when doing a hill climb in anything less than full throttle (because of lost torque). Good luck 😉
Roughly how much does a 50T sprocket weigh?
Sean-Christophe J on Jul 20, 2017
BEST ANSWER: I can tell you that the 50T for the YZ450 is 1192g (I bought one to try it vs the stock 49T). I did not like the 50T so I bought a 49T Primary Drive aluminum, and that was only 375g. That's a 817g (1.8lbs) difference!
I ride a Yamaha 2008 raptor 250 and i want more acceleration speed, the stock sprocket sizes are 14 teeth on the front and 38 teeth on the rear, what sprocket sizes and possible chain length would in need to get more acceleration speed?
A shopper on Mar 4, 2020
BEST ANSWER: Same chain size but up the rear to a 40 or 41 rear. You can always drop to a 13 front counter and get the same effect. 1 down on the front is equal to about 3 on the rear.
Hello I need more torque for my banshee 350 should I run a 13 tooth in front and a 40 tooth in rear?
A shopper on Mar 25, 2019
BEST ANSWER: either 12/40 or 13/42 will work but it all depends on riding preference .
Will the OEM bolts from a wr250r fit this sprocket?
GREG M on Aug 13, 2018
BEST ANSWER: OEM bolts from the WR250R will fit this sprocket.
Can I run a 13/39 sprocket set up with a 96 link chain for my ltr 450?
Cameron G on Mar 18, 2018
BEST ANSWER: You might should get a 98 link chain to be on the safe side.
What color would the sprocket be for an 01 CR250?
William B on Aug 20, 2017
BEST ANSWER: it will be a steel color.
Why is there only a 42 tooth rear sprocket available for my '83 250R?
A shopper on Apr 1, 2020
BEST ANSWER: Yes, we only have that size available for your machine.
Looking for a stock sprocket for a 04 ktm 50 jr?
John m on Aug 11, 2019
BEST ANSWER: Unfortunately, we do not have any after marked rear sprockets for your machine. However, you can find the OEM rear sprocket by going to OEM Parts > Enter in Machine > go under the schematic "Rear Wheel" > It will be part #21. If you need assistance, please call 1-800-336-5437.
Will this sprocket fit a XL250r?
Clinton H on Mar 30, 2019
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.
If I use a 14 tooth in the front and an 49 tooth in the rear on my wr250r what size chain do I need?
William B on Feb 23, 2019
BEST ANSWER: What year is your machine?
What color would it be for lt250r 1991-1992?
Steven M on Oct 30, 2017
BEST ANSWER: silver.
Will this fit a 2000 TTR125 with the small bolt pattern?
A shopper on Mar 14, 2017
BEST ANSWER: Yes, as long as this is the way it came stock it will fit your machine. Make sure you enter in the make, model, and year of your machine in the drop down boxes.
Hi i have a 1987 yamaha warrior 350 that i ordered a rear sprocket for from a local shop when i went to pick it up it only had 4 mounting holes mine has 6 so can you tell me if this spocket has 4 or 6 mounting holes ?thanks
A shopper on Mar 13, 2017
BEST ANSWER: This one has 4 bolt holes. I also checked the OEM sprocket and it has 4 bolt holes as well. It may be that you have a different sprocket hub than what came from the factory.
What color is this specific sprocket for my machine?
Lazaro R on Mar 1, 2017
BEST ANSWER: What machine would this go on?
I ordered a 51 tooth steel rear sprocket for my wr450 which has a 6 bolt pattern but the new sprocket has 12- bolt/holes , hoping this is normal ? still looks like it can be mounted ( with 6 additional holes )
Samuel B on Dec 12, 2016
BEST ANSWER: Yes, it should still fit. Some of the sprockets fit several machines so they have an extra bolt pattern on them.
I have a 2001 yz 125 and wanted to putchase a 40t rear sprocket but dont know which one will I recieve ?
A shopper on Nov 25, 2016
BEST ANSWER: These are just a generic picture. You will receive the correct style and bolt pattern for your machine. It will be a steel sprocket in a silver finish.
What color sprocket would I be receiving? Black or silver? I would be ordering for 2004 yz125.
Kirk on Oct 19, 2016
BEST ANSWER: The Primary Drive Steel Sprockets are Silver in color.
I have a yamaha wr 250r. I wanted to know if I go from my stock 43T rear sprocket to a 47T will my stock chain fit or will I need a new chain? If so what size
STEVE B on Sep 22, 2016
BEST ANSWER: You will need to add 2 chain links for every 2 teeth you add or subtract from your sprocket. In this case, you would be adding 4 teeth to the rear so you will need to get a chain that is 4 links longer than your stock chain. Ex: For a 2012 WR250R it has a stock chain length of 108 so you will need to get a 112 link chain.
What sprocket am I getting? The picture has 5 sprockets in it and I selected the sprocket I wanted (37 tooth) but still shows all five sprockets, I would like to know what I'm getting before I make a purchase...
Trevor O on Sep 14, 2016
BEST ANSWER: It depends on your machine application. Some machines require a larger center hole, some require a different center shape. Most large MX bikes use the sprocket pictured on the right. Most ATV's use the sprocket pictured on the left. Most mini or trail bikes use the sprocket in the middle.
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