ADA Racing Kawasaki Cylinder Head Domes

ADA Racing Kawasaki Cylinder Head Domes.

Note: Domes are sold individually.

Kawasaki 650 78mm Domes
Billet dome has .015” squish relief at 78mm with a 9.5° angle.
K650 35cc - 178-183lbs KA6535
K650 34cc - 185-190lbs KA6534
K650 32cc - 200-205lbs KA6532
K650 30cc - 212-217lbs KA6530
K650 28cc - 215-230lbs KA6528

Kawasaki 750 81mm BoreBillet dome has 0.05” squish relief at 81mm with a 4° angle.
K750 30cc - 150lbs/89 Octane KA7530
K750 28cc - 165lbs/91 Octane KA7528
K750 26cc - 180lbs/92 Octane KA7526
K750 24cc - 195lbs/100 Octane KA7524
K750 22cc - 210lbs/110 Octane KA7522
K750 20cc - 225lbs/115 Octane KA7520

Kawasaki 800 82mm Bore *
Billet dome has .005” squish relief at 82.5mm - fits up to 83mm piston with a 4° angle.
K800 32cc - 180lbs/91 Octane KA8032
K800 30cc - 190lbs/95 Octane KA8030
K800 28cc - 200lbs/98 Octane KA8028
K800 26cc - 208lbs/105 Octane KA8026
K800 24cc - 216lbs/110 Octane KA8024
K800 22cc - 225lbs/114 Octane KA8022

NOTE: We have seen situations where certain Kawasaki 800 SXR cylinders do not produce the expected compression with the ADA Racing Domes, usually producing lower numbers.  We do not know why this has happened and unfortunately can not tell until the aftermarket head and domes have been installed and compression tested but in all cases, this has been due to the cylinder itself and not the ADA domes. 

Kawasaki 800 SXR Limited Spec 82mm Bore Domes *
Billet limited drop dome for the Kawasaki 800 SX-R. These domes have a .050” drop at 82mm for use in Limited engines with a .060” base gasket.
K800 LTD 29cc .50” Drop @ 82mm KA8229D50
K800 LTD 28cc .50” Drop @ 82mm KA8228D50
K800 LTD 26cc .50” Drop @ 82mm KA8226D50
K800 LTD 24cc .50” Drop @ 82mm KA8224D50
K800 LTD 22cc .50” Drop @ 82mm KA8222D50
800SXR .060” Base Gasket 7040F

Kawasaki 800 SXR V2 Head 85mm Bore Domes *
Billet dome for ADA Racing Kawasaki 800 V2 girdled head and big bore heads. Squish relief is .005" @ 85mm with a 4-degree angle. These domes will not fit our standard head shells, as the diameter is larger than our standard domes. They are notched to fit around the head studs and use a larger diameter compression oring (part#or153). Domes are sold individually. We do not have compression readings for these domes, as they are generally used with modified/ported cylinders.

K800 32cc @ 85mm KA8532
K800 30cc @ 85mm KA8530
K800 28cc @ 85mm KA8528
K800 26cc @ 85mm KA8526
K800 24cc @ 85mm KA8524

NOTE: We have seen situations where certain Kawasaki 800 SXR cylinders do not produce the expected compression with the ADA Racing Domes, usually producing lower numbers.  We do not know why this has happened and unfortunately can not tell until the aftermarket head and domes have been installed and compression tested but in all cases, this has been due to the cylinder itself and not the ADA domes. 

Kawasaki 900 75mm Bore
Billet dome has 0.15” squish relief at 75mm with a 10° angle.
K900 30cc - 150-160lbs/91 Octane KA9030
K900 28cc - 165-175lbs/95 Octane KA9028
K900 26cc - 180-190lbs/105 Octane KA9026
K900 O-Ring Kit ORKITK900

Kawasaki 1100 - 80mm Bore
Billet dome has 0.15” squish relief at 75mm with a 4° angle.
K1100 80mm 32cc - 140-150lbs/89 Octane KD1232
K1100 80mm 30cc - 150-160lbs/91 Octane KD1230
K1100 80mm 28cc - 165-175lbs/95 Octane KD1228
K1100 80mm 26cc - 180-190lbs/105 Octane KD1226
K1100 80mm 24cc - 195-205lbs/108 Octane KD1224
K1100 80mm 22cc - 210-220lbs/112 Octane KD1222
K1100 O-Ring Kit ORKITK1100

Kawasaki 1100 - 82mm Bore Race Dome
Billet dome has 0.10” relief at 82mm bore dieter and a 3° squish angle with 50% squish area.
K1100 82mm Race 30cc KD8230
K1100 82mm Race 28cc KD8228
K1100 82mm Race 26cc KD8226
K1100 82mm Race 24cc KD8224
K1100 82mm Race 22cc KD8222

Kawasaki 1100 - 85mm Bore
Billet dome has 0.10” relief at 85mm bore dieter and a 3° squish angle with 50% squish area.
K1100 85mm Race 30cc KD8530
K1100 85mm Race 28cc KD8528
K1100 85mm Race 26cc KD8526
K1100 85mm Race 24cc KD8524
K1100 85mm Race 22cc KD8522


Billet dome has .015” squish relief at 80.5mm with a 16° angle.
Kawasaki Ultra 150/STX-R 80.5mm Bore Part No.
KUltra 44cc +10lbs/91 Octane KU1544
KUltra 42cc +20lbs/91 Octane KU1542
KUltra 40cc +30lbs/98 Octane KU1540
KUltra 38cc +40lbs/105 Octane KU1538
KUltra 36cc +50lbs/108 Octane KU1536
KUltra 32cc +70lbs/112 Octane KU1532

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Returns must be initiated through your Customer Account Portal within 10 days of delivery.

Returned items must be:

• Unused
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Unauthorized returns will be refused at our shipping dock.

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Non‑Returnable Items

The following items are final sale and not eligible for return, exchange, or store credit:

• Seat Covers
• Mat Kits, Mat Sheets
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• Waterboxes
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• Special Order Items
• Close‑Out Items

Electrical Components (non‑returnable):
Starter Motors, Regulators, Relays, CDI Units, Ignition Coils, Stator Coils, Stator Assemblies, Fuel Injectors.

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Performance Product Use & Compliance Notice

Atlantic Jet Sports supplies high‑performance components engineered solely for closed‑course racing and sanctioned competition. These parts are not designed, tested, certified, or warranted for use on public waterways or on watercraft equipped with emissions‑controlled systems.

Installing or using these components may change the watercraft’s safety characteristics, emissions compliance, or legal classification. Using competition‑only products on public waterways may violate federal, state, or local regulations.

By purchasing, installing, or operating a watercraft equipped with these components, the user acknowledges and accepts full responsibility for all associated risks—including, but not limited to, personal injury, property damage, mechanical failure, or legal consequences. The user further agrees that Atlantic Jet Sports assumes no liability for damages arising from improper installation, misuse, or operation outside of competition environments.

For best performance and safety, Atlantic Jet Sports strongly recommends installation by a qualified technician experienced with high‑performance Personal Watercraft systems.

Product Installation Disclaimer

⚠️ Warning — Professional Installation Required

• Ensure the hull is fully ventilated and free of fuel vapors before using electric or battery‑powered tools. Failure to do so may result in fire, explosion, serious injury, or death.
• Disconnect the battery before performing any installation or maintenance to prevent accidental ignition, electrical shock, or unintended engine engagement.
• Allow the engine, exhaust, and surrounding components to cool completely before beginning work.
• No smoking, open flames, or spark‑producing devices should be present during installation.

This product is not intended for use on watercraft equipped with pollution‑control systems. Modifying or removing emissions‑related components may violate state or local laws and may render the watercraft illegal for use outside of competition.