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Cometic Top End Gasket Set

Displaying parts for your 2019 HONDA CRF450R

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Cometic Top End Gasket Set

Fits: 2019 HONDA CRF450R

Part# 1009120259

349 Reviews | 31 Questions, 45 Answers

Our Price: $85.60

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Cometic Engine Performance

Details

The Cometic Top End Gasket Kit comes with everything you need to properly complete a total top end rebuild of your engine. Cometic manufactures their gaskets to exceed OEM quality from chemical resistant, non-asbestos, flexible aramid fiber that is laminated on top of a stainless steel core. This makes for thick, exceedingly robust gaskets that won’t fold or tear during installation, giving your top end the tight seals it needs to keep running strong no matter the speed.

Specs:

Complete top end gasket kits with head and base gaskets
Laminated aramid fiber construction
Gasket material is laminated on top of stainless steel cores
Aramid fiber contains no asbestos
Gaskets are flexible and won’t tear
Aramid fiber resists chemicals including fuel, coolant, and oils

WARNING: Cancer and Reproductive Harm -

Cometic Top End Gasket Set Reviews

Each review submitted enters you into a
$100 gift card monthly drawing and a
$500 gift card quarterly drawing!

349 Ratings

4.5out of 5 stars

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349 Ratings

Rated 5 stars by 74% of reviewers

Rated 4 stars by 14% of reviewers

Rated 3 stars by 5% of reviewers

Rated 2 stars by 2% of reviewers

Rated 1 star by 5% of reviewers

Value: 4.5 / 5.0

Durability: 4.7 / 5.0

Fitment: 4.7 / 5.0

Performance: 4.7 / 5.0

Recommend it?

Rated 5 out of 5

May 23, 2025

Cant beat Cometic.

Cant beat Cometic gaskets. Too time consuming and too much of a headache to cheap out on gaskets just to have a leak or tear your machine back down to replace. Always go with Cometic.

Daniel A

Rated 5 out of 5

Jul 1, 2024

Amazing quality!

Came with everything I needed to rebuild my YZ250X and I have zero complaints!

Christopher L

Rated 5 out of 5

May 16, 2024

Simply the best

When it came to a top end piston refresh I wanted piece of mind on all parts. Cometics pricy but the absolute best in quality fit and durability.

DENNIS V

Rated 5 out of 5

Mar 3, 2024

Way better than I thought

Doing a rebuild on my entire motor needed just a head gasket so got this thinking I should replace all my seals for the price I wasn't expecting everything to be this amazing all the rubber seated perfectly definitely worth the money.

Titus A

Rated 5 out of 5

Jun 12, 2023

Has everything you need!

Worked great for the top end rebuild - Had all the gaskets and seals necessary for the cylinder including the exhaust.

James D

Rated 5 out of 5

Jun 1, 2023

Worth the extra dough!

High quality gasket set! You pay a little bit more for it but it's of higher but when it comes to sealing your engine, I feel it's worth it for the quality you get.

Arthur C

Rated 5 out of 5

May 24, 2023

great

great gasket kit works very well and the fitment was perfect.

Ayden L

Rated 5 out of 5

May 12, 2023

Great quality gaskets

Very nice MLS gaskets, no rtv is necessary just a clean mounting surface! And they were on sale for less than the tusk paper gasket set!

SAM S

Rated 5 out of 5

May 5, 2023

KX 500 top end gaskets

Fit and quality good and great price! I think you should buy it!

BRET B

Rated 1 out of 5

Mar 20, 2023

DOES NOT HAVE ALL GASKETS/SEALS FOR KDX!

Fine Gaskets but DOES NOT contain everything for the top end on a KDX. Its missing crucial coolant fitting gasket, 2 power valve O seals and the copper exhaust manifold O ring. For $55 IT SHOULD.
Now, the TUSK top end kit contains EVERYTHING. ALL 12 parts for a top end and the kit is 1/3rd the price.

Shannon S

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$500 gift card quarterly drawing!

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Oil in radiator and crankcase. Head gasket look. Good.what. could. It be?

Dec 11, 2016

What vehicle is it for? It could possible be a water impeller seal or even a crank seal... not sure what vehicle you have?

Aaron LDec 13, 2016

Can you torque down gasket, realize you forgot to check ring gap, undo and reuse as long as engine was never heat cycled?

Christian TMar 27, 2022

No. It's not good to do that. I've had to take the cylinder off before for a similar reason and the gasket was destroyed. The gasket rips when taking off the cylinder off.

Jon AMar 28, 2022

Is this for the standard bore or big bore top end?

Justin TApr 3, 2018

It is for standard bore cylinder.

Corey SApr 4, 2018

Why does this come with 4 base gaskets for 2018 150sx ?

Kevin MJan 21, 2023

Each gasket is a different thickness, you can choose which option you prefer, typically the thinnest gasket will make more power but could cause detonation if 100 octane fuel isn't used

Garrett BJan 23, 2023

I’m having trouble with my piston exceeding past the cylinder on stroke an slapping bottom of head. Are these gaskets thick enough to prevent that? Any help is appreciated. Thank you

Jeremy CNov 27, 2019

Not sure what bike you have but Ktm and husky two strokes most of the time have to be stacked to get the correct deck height measure the old base gasket/s and match the thickness of the new ones

Tony CDec 26, 2019

Valve seals included?

steven sApr 30, 2019

Power valve seals are not included

Justin GMay 1, 2019

For KTM 2 stroke, does it include the copper washers for the cylinder head?

Adam PAug 9, 2018

I,m not sure on the copper washers as it was almost a year ago.I do remember i bought some additional gaskets from a dealer (oem),because some were not correct. The cylinder base gasket must be measured and replace with the same thickness.That is critical and bought seperate for certain.

Matthew MAug 9, 2018

what size is the cylinder gasket?

Jeromy GMar 27, 2018

The gasket is the same thickness of the OE, not any thicker or thinner.

Zach L.Jun 2, 2018

Do the valve seals come in this kit for kfx450r?

Jason LApr 20, 2017

Those are in the complete gasket set not a top end set

DAVID TMay 24, 2017

Will this work for .040 oversize?

May 7, 2025

No it will not, would have to order for your bore/piston size.