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Gaskets and Seals› Engine Gaskets and Seals
Cometic Gasket
Cometic 15-19 Beta RR480 100mm Bore Top End Gasket Kit
SKU: C006 C3774
Moderate — 2–4 hours
Overview
It features graphite gaskets with a steel core, laminated on both sides with flexible graphite. Fiber gaskets are included for maximum seal, flexibility, and torque retention. The kit also contains O-ring gaskets that meet or exceed OEM specifications.
Show original supplier description
Part #: C3774
Cometic utlizes their in-house dynamometersand engine assembly rooms to ensure quality and reliability
Vehicle Symptoms
- loss of power under acceleration
- white smoke from exhaust when engine is warm
- coolant loss with no visible external leak
- rough idle and engine misfire
- oil and coolant mixing in reservoir
Diagnostic Codes
- P0300 – random/multiple cylinder misfire
- P0301 – cylinder 1 misfire
- P0302 – cylinder 2 misfire
Relevant Conversations
- Cometic C3774 top-end gasket kit 100mm bore specs and fitment
- white smoke from exhaust and coolant loss top end gasket replacement
- P0300 P0301 P0302 misfire causes head gasket leak
- low compression on one cylinder need top end gasket kit
- Cometic C3774 vs OEM Polaris top end gasket kit
- how to install top end gasket kit 100mm bore correctly
- Cometic C3774 torque specs head gasket sequence
- what gaskets included in Cometic C3774 top end kit
- top end rebuild 100mm cylinder piston and gasket kit
- overheating rough idle blown head gasket powersports forum
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
| Brand | Cometic Gasket |
| Part Number | C006 C3774 |
Videos
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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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