Gaskets and Seals› Engine Gaskets and Seals

Cometic

MLS Cylinder Head Gasket Kit

$79.49

SKU: C3695

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Overview

The Cometic Gaskets C3695 is a top-end gasket kit specifically designed for Yamaha WR250F (2020-2021), YZ250F (2019, 2021), and YZ250FX (2020) models. This kit features a 77mm bore and a .027 MLS cylinder head gasket for a reliable engine seal.

Key features include precise fitment with its 77mm bore and enhanced sealing capabilities from the .027 MLS cylinder head gasket. The kit is also Prop 65 compliant, meeting safety and regulatory standards.
Show original supplier description
The Cometic Gaskets C3695 is a top-end gasket kit engineered for Yamaha's 2020+ WR250F, 2019+ YZ250F, and 2020+ YZ250FX motorcycle models. This comprehensive kit includes everything necessary for a full top-end rebuild or maintenance, ensuring optimal engine performance and reliability. Constructed with multi-layer steel (MLS), the head gasket boasts a .027-inch thickness and features Cometic's proprietary EST (Extreme Sealing Technology). This design is intended to eliminate hot spots and reduce bore distortion under high combustion pressures, making it suitable for both naturally aspirated and boosted applications. The kit also includes cylinder O-rings, rocker gaskets, and a base gasket, providing a complete solution for engine resealing. This gasket kit is designed for precise fitment with a 77mm bore, directly addressing the needs of the specified Yamaha models. Cometic emphasizes that their gaskets are made in the USA and engineered to handle the demands of modern high-horsepower 4-stroke engines. The product is also Prop 65 compliant, addressing cancer and reproductive harm warnings as required by California regulations.
Vehicle Symptoms
  • White smoke from exhaust on startup
  • Engine overheating after hard riding
  • Coolant loss with no visible leaks
  • Oil in coolant or coolant in oil
  • Loss of compression or hard starting
Relevant Conversations
  • Yamaha YZ250F white smoke exhaust fix
  • 2020 WR250F overheating after rebuild
  • Cometic C3695 gasket kit review
  • YZ250F coolant in oil head gasket symptoms
  • YZ250FX top end gasket kit install time
  • MLS vs OEM head gasket YZ250F
  • 77mm bore head gasket for Yamaha 250F
  • YZ250F loss of compression after race
  • Cometic vs Athena gasket kit comparison
  • Yamaha WR250F top end rebuild parts list

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandCometic
Part NumberC3695
CategoryGaskets and Seals
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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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