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Pro X Piston Kit

Fits Your Machine

Displaying parts for your 1991 KAWASAKI KDX200

Pro X Piston Kit
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Pro X Piston Kit Standard (65.95 mm)

Fits: 1991 KAWASAKI KDX200
Part# 1288530094 | Mfg Part# 01.4285.B

Our Price: $78.13

MSRP: $116.77 - You save $38.64 (33% off)

Get $2.34 in Quick Cash

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5+ In-Stock

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Additional Videos

How To - Rebuild A Top End

How to - check piston ring end gap

Pro X 4 Stroke Piston

Pro X 2 Stroke Piston

How to - Four-Stroke Top End Rebuild (Part 2)

How To - Rebuild Motorcycle or ATV Top End (Part 2)

How To - Hone A Cylinder

How To - Rebuild Motorcycle or ATV Top End (Part 1)

How To Measure Your Dirt Bike's Piston To Cylinder Wall Clearance

RM YouTube Channel
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Details

    If you’re looking for a cast piston that runs like a top and slides like it’s on ice, pick up a Pro X Piston Kit for you bike, UTV, or ATV.

    Pro X pistons are the premier cast piston made from a specialized low-expansion, low-friction aluminum alloy, commonly used by Japanese OEM engine manufacturers to give the piston an incredibly low co-efficient of friction. For you, this translates to a cast piston perfect for 2 strokes and 4 strokes that has the durability of a forged piston but at a much lower cost. Certain models come with a tin-based skirt coating that reduces wear during and after the wear-in process. This black coating also comes in handy during engine servicing since any excess wear to the piston skirt or cylinder wall will be very apparent in the wear patterns of this coating.

    Pro X uses the best materials available along with innovative designs to give you pistons that are tailor made to the unique requirements of your machine. So if you’re worrying about Pro X Piston Kits being a good fit for you, don’t. Pro X has you covered.

    Specs:
  • Kit includes piston, piston rings, wristpin, and circlips
  • Does not include wristpin bearing for 2 strokes
  • High silicon content aluminum alloy piston
  • Some models include tin-based anti-friction skirt coating
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

Pro X Piston Kit Reviews

Each review submitted enters you into a
$100 gift card monthly drawing and a
$500 gift card quarterly drawing!
 
4.6 / 5.0
178 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
137
23
8
2
8
Value
4.8 / 5
Durability
4.7 / 5
Fitment
4.8 / 5
Performance
4.8 / 5
Recommend it?
Yes (97)
No (3)
Value
5 / 5
Durability
5 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
Oem japanese made pistons for great price
used literally dozens of pro x pistons in 2 stroke and 4 stroke bikes with zero issues. if pro x makes a piston kit for your bike trust it, buy it.
November 21, 2019
Red deer , AB, CA
Age: 25-44
Purchased
over 3 years 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 item
Great item. Had no issues at all. It was a great value. Thanks.
November 12, 2019
fairmont, WV, US
Purchased
2 months ago
Value
5 / 5
Durability
5 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
Look great
Good fit as description says. I was impressed with the quality and fitment . I did need to reset the cylinder height ,but this should be done with all piston changes.
October 30, 2019
Colton , CA, US
Age: 45-64
Purchased
1 month 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
Great Piston
A very good replacement for OEM on KTM's. We replace the top in every 20 to 25 hours. We love the price and value of this piston.
October 22, 2019
Orlando, FL, US
Age: 15-24
Purchased
12 months ago
Gender:
Male
Weight:
101 - 130 lbs.
Height:
5'4 - 5'6
Value
5 / 5
Durability
5 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
Helps keep my engine pulse up. You push it down and it pops right back up.
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
Value
5 / 5
Durability
5 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
Great value..as good as oem
Kx/rm 65..easy install..a good oem replacment..not a fancy forged piston but for a recreationally used bike, it does the job.

-m-2003 SUZUKI RM65--
September 27, 2019
Ramona, CA, US
Age: 25-44
Purchased
2 months ago
Gender:
Male
Value
5 / 5
Durability
5 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
Great piston
Worked perfect in a 05 YZ85. ProX makes great pistons. They are shaped just like stock for reliability and power.

-m-2005 YAMAHA YZ85--
September 9, 2019
San Diego , CA, US
Age: 25-44
Purchased
3 months ago
Value
5 / 5
Durability
5 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
Great Quality and Great price
I bought this for a 2001 Honda CR 250. Items arrived on time as usual from Rocky Mountain. Once it arrived upon inspection I was impressed with the quality of the product and fitment.

-m-2001 HONDA CR250R--
September 3, 2019
Vansant, VA, US
Age: 45-64
Purchased
10 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
Great Piston and Price!
cost less them an OEM and works just as good. Very nice piston. Package arrived fast and in great shape.

-m-2014 KAWASAKI KX250F--
August 23, 2019
Jacksonville, FL, US
Age: 15-24
Purchased
over 2 years 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?
No
pro x piston kit kx 250f
this kit was everything I needed and install was easy
bike runs great and I would buy this again for sure

-m-2006 KAWASAKI KX250F--
August 13, 2019
bellingham, WA, US
Age: 25-44
Purchased
over 4 years ago
Gender:
Male
Weight:
191 - 220 lbs.
Height:
6'4 - 6'6
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 29 questions Browse 29 questions and 65 answers
Is the pro x piston a forged or cast piston?
JOHN D on Dec 25, 2016
BEST ANSWER: This is a cast piston.
How do I know if I need new piston?
Richard M on Feb 11, 2018
BEST ANSWER: 1.Pitting/damage to top of piston, 2.scoring/gouging/damage to sides , 3.mics out of bore tolerance, 4.sleeving or overboring cylinder
What is a or b piston kit. Mean for pro-x????
A shopper on Aug 20, 2016
BEST ANSWER: Hey there,

The manufacture measures the bore from the factory and provides a letter to represent the size. For example, "A" would be smallest within the manufactures tolerances and "B" or "C" would be larger sizes. The manufacture will usually stamp the cylinder with the size. The recommendations I received are to go up one letter to account to wear and tear. However, that's not official, just a recommendation that was given to me.
I have a 2002 kx 85 with a ported and polished cylinder. Would this work?
A shopper on Mar 3, 2019
BEST ANSWER: As long as your cylinder hasn’t been bored passed standard piston size yes you can. If your cylinder exceeds stock bore size you’ll need to purchase a piston size that matches your bore size. If it’s stock besides the port & polish your good 👍🏻
I have a rm85 with a locked kick start I'm jus trying to find what could it be ?
shaun w on Aug 22, 2017
BEST ANSWER: If there is metal in the transmission oil you will need to take the right side cover off and see what is stopping the starter lever. if the piston is seized in the cylinder, the top end will need to be removed and repaired as needed.
is this piston a double ring or single ring piston. i have a 2002 YZ125, and want to know if this will be a good fit?
Vincenzo G on May 16, 2019
BEST ANSWER: for 125 it should only be a single. Just replaced and was only a single ring on this design
Does your Pro X Piston Kit come with a Wrist Pin and Wrist Pin Bearing?
Jeremy T on Feb 7, 2018
BEST ANSWER: yes but i recommend purchasing the oem bearing, the difference in quality is clearly visible
I have a 2015 yz250f and I believe the owner before me put a pro x piston in it and it’s time for some rings but need to confirm if it’s a prox piston or not is there any marking on the piston that I can use to confirm that it’s a prox? and if so can I run oem rings or do I need the prox rings?
Nickolas A on Oct 29, 2019
BEST ANSWER: I would never tear down an engine and just change rings. I’ve had a piston break before and the damage it caused was catastrophic. Send the extra money and have piece of mind
I need to change the Piston rings but i only find the full Pro X piston kit. Do you sell the Pro X Rings or does the OEM piston rings work in this case for the Pro X piston?
Angela Monica G on Sep 4, 2019
BEST ANSWER: I would be happy to look into this for you. What is the year, make and model for your machine?
Would this be legal for Ama stock class racing?
Corey G on Mar 17, 2019
BEST ANSWER: Yes as long as it stays in that class engine size. If you get a big bore Set you would have to run in and open class.
I am planning on ordering this kit for my 2000 ktm sx250. This kit doesn't come with the wristpin bearing , correct? Will the specific piston for my bike come with the black coating around the sides or not for my specific bike??
Brian P on Feb 24, 2018
BEST ANSWER: No wrist pin bearing or black coating on the kit for my 250 exc
What to do when blown motor?
Randy G on Dec 14, 2017
BEST ANSWER: If it’s the top end you can have it bored and sleeved, if it’s the bottom end they can be rebuilt but it is time consuming and slightly costly.
Should I hone (with ball hone) my 2009 KX 65 bore before installing the piston? The service manual I have says do not hone, but I see on forums people hone their bores
John F on Feb 22, 2019
BEST ANSWER: John, the best way would be to use a green scotch brite pad. You basically want to remove the carbon so rings seat in well. Hope that helps in you installation. Jeff
Hi, I bought this piston for my 2013 crf250r, it has a dot on it, which way does the dot go it’s very hard to tell?
Corey F on Feb 21, 2019
BEST ANSWER: Dot should be exhaust side, but look at the top of the piston The moon shaped cuts in the piston are to clear the valves, the Intake valve are much bigger Than The exhaust. The smaller reliefs face exhaust side
does it come with the lubrication holes drilled?
Mike n on Feb 21, 2019
BEST ANSWER: No, you have to drill them but it does have instructions on where to drill.
What is standard bore size for a 2001 125 yz ?
A shopper on Jun 22, 2017
BEST ANSWER: Stock bore size on yz 125 is 53.94mm. Check ring gap per manual. If it is offered go with a B size since your bike is old you'll have a tighter fit.
I purchased the prox piston for my 00 yz125. Is the ring omnidirectional? I looked all on the ring and could not find any markings.
Justin R on Sep 22, 2019
BEST ANSWER: The rings can go either way on that application.
Is this goin to fit my beta right is it an a b or c?
sam n on Aug 3, 2019
BEST ANSWER: It would be considered a “b” piston
I have a 2004 KTM 300exc and it’s says it’s a 71.95mm Is it correct and what else’s would I need to finish a fresh top end?
Ethan A on Jul 20, 2019
BEST ANSWER: I used this on a KTM 50cc, so I don know about your size. I would buy a $8.00 digital caliper from Harbor Freight to measure your piston. You probably only need a top end gasket kit to finish. I would also order a couple extra circlips because its easy to loose or ruin them.
Hello, just cheking if this part is for 2 stroke YZ250X 2016? , because the picture has both 2 and 4 strokes piston. thanks
Luis A on Jul 9, 2019
BEST ANSWER: Yes, the picture is just a generic. However, your machine is listed to fit.
I need piston prox size B Ford 2009 ktm 300.
you have it available?

I need piston pro x B d'Or 2009 ktm 300.you have it available?

.thank you
A shopper on Nov 14, 2018
BEST ANSWER: I checked into this for your and this is a size B piston for your machine.
will this piston work in a 2013 Husaberg te250?
A shopper on May 28, 2018
BEST ANSWER: Yes, you will just need to enter in your machine in the drop down boxes above the product image.
How come it doesn't give me the options for a kx100 ?
A shopper on Oct 7, 2017
BEST ANSWER: Unfortunately, we do not carry this piston kit for your machine. If you let me know what year your KX100 is I can check our inventory for you.
will this piston for my 2004 suzuki eiger LTF400F?
A shopper on Aug 7, 2017
BEST ANSWER: Unfortunately, we do not carry this piston for this machine.
It is compatible with the motorcycle KTM 250 EXC-F 2013?
Luis V on Apr 20, 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.
Is this a "c" piston?
Skip N on Apr 4, 2017
BEST ANSWER: What machine is this for?
Will this work on my Yz85?
A shopper on Dec 26, 2016
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.
Does it come with gaskets?
A shopper on Dec 5, 2016
BEST ANSWER: No, gaskets are not included with this kit.
So what is the size of an "A" piston for a 2005 CR 250R ?
I have the stamp of "B" on the cylinder and the piston I ordered/rec is a standard 66.36mm, will this work or do I need to order a different size for "B"?
CHARLES S on Oct 19, 2016
BEST ANSWER: The diameter of the OEM A piston is 65.9mm. This kit should work with your cylinder as long as the ring end gap measurement is correct.
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