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Primary Drive Rear Steel Sprocket

Fits Your Machine

Displaying parts for your 2017 YAMAHA YZ85

Primary Drive Rear Steel Sprocket
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Primary Drive Rear Steel Sprocket

Fits: 2017 YAMAHA YZ85

Our Price: $12.99$19.99

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

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Additional Videos

Motorcycle and ATV Gearing Guide

How to - Renthal Chain and Sprocket Install Instructions

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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

Each review submitted enters you into a
$100 gift card monthly drawing and a
$500 gift card quarterly drawing!
 
4.7 / 5.0
901 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
701
155
27
11
7
Value
4.9 / 5
Durability
4.7 / 5
Fitment
4.9 / 5
Performance
4.8 / 5
Recommend it?
Yes (260)
No (6)
Value
5 / 5
Durability
5 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
Can't beat it for the price.
I've been running these on my 350's for years now. Can't beat the price and durability. Easily get 80 hours out of them.
October 22, 2019
Port St Lucie, FL, US
Purchased
7 months ago
Value
4 / 5
Durability
4 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
2002 Honda CR250R
I bought new front and rear sprockets and a Tusk o-ring chain. I've done several practice days at local mx tracks and about 20 hours of off road trail riding now. So with only one adjustment to the chain and spraying WD-40 after each wash I see very little signs of wear. :) BRAAP BRAAP

Peter

-m-2002 HONDA CR250R--
October 18, 2019
Hugo, MN, US
Age: 45-64
Purchased
over 2 years ago
Gender:
Male
Weight:
161 - 190 lbs.
Height:
5'4 - 5'6
Value
5 / 5
Durability
5 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
Good and sturdy
I was switching up the gearing on my bike and this did the trick. Solid sprocket that performed well in the mountains and was a great value.

-m-1998 HONDA CR250R--
October 17, 2019
Pinole, CA, US
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
4 / 5
Recommend it?
Yes
Good product
Installed quickly and easily, no issues at all so far. Feels like it should last.
October 11, 2019
Calumet, MI, US
Age: 15-24
Purchased
1 month ago
Gender:
Male
Weight:
161 - 190 lbs.
Height:
6'1 - 6'3
Value
5 / 5
Durability
5 / 5
Fitment
5 / 5
Performance
5 / 5
Great Sprocket
It fits right, comes in many sizes, is durable and inexpensive - this is a great product.

-m-2006 SUZUKI DR-Z 400E--
October 9, 2019
Snowflake, AZ, US
Age: 25-44
Purchased
11 months ago
Gender:
Male
Value
5 / 5
Durability
5 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
Sprocket
Solid new 48t sprocket. Very happy with it. Time will tell how well it holds up, but it seems very durable.
October 6, 2019
Prescott, AZ, US
Purchased
2 months ago
Value
5 / 5
Durability
5 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
Steely
Strong steel. Easy fitment. Looks like it belongs with the ATV.
Ready to go.
Ready to go.
October 3, 2019
St.Petersburg, FL, US
Age: 25-44
Purchased
2 months 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
This is probably my 3rd or 4th primary drive brand chain kit on different bikes. They are priced right and have never failed us. We are outdoor woods riders and these work well for us. Keep it clean and lubed and it will last us a season of racing and beyond.
October 2, 2019
Greensburg , IN, 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
Solid sprocket
Snug fit, lightweight for steel and solid feeling.
October 2, 2019
Coldstream, ON, CA
Purchased
2 months ago
Value
5 / 5
Durability
5 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
Works great on my sons ktm 85sx and my friends are pretty good at the same price but they have to go with the voucher program so that is all
October 1, 2019
Milford, MI, US
Age: 45-64
Purchased
over 2 years ago
Gender:
Male
Weight:
191 - 220 lbs.
Height:
5'10 - 6'0
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 25 questions Browse 25 questions and 55 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, they are all 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.
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.
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!
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
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.
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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