Cylinder head top cover for KTM EXC Husqvarna TE GAS GAS EC 250 2024-2025

Features:

• Features an improved combustion chamber design that delivers more power across the entire RPM range and reduces the risk of detonation. It is designed and tested for use with 91+ octane fuel. The head comes with a complete head gasket set.
• Compared to the stock cylinder head insert: The original compression before installation is approximately 170 PSI, after installation approximately 183 PSI (as shown), with a squish clearance of 1.2 mm.
  
• Made from 7075 aluminum, which withstands high pressures and temperatures, so it does not crack under pressure.
  
• Consistent power gains across the entire RPM range, especially in the low/mid range:
  
• Improved fuel efficiency
  
• Greatly reduced risk of detonation
  
• Enhanced engine longevity
  
• Smoother power delivery
  
• Does not require racing fuel
  

Item Specifications:

Brand: NICECNC
Condition: 100% new
Material: 7075 Aluminum
Processing: CNC machined
Cap surface: Anodized

Disclaimer/Liability Statement:

• These products are intended for use only in closed-course competition.
  
• It is the owner's responsibility to ensure that the fuel injection/refueling is suitable for local weather and conditions to avoid engine damage.
  
• We are not responsible for any damage, injury, or loss resulting from the use of these products.
  

Package Includes:
1x Cylinder Head Kit

Fits:
For KTM 250 EXC 2024-2025
For Husqvarna TE250 2024-2025
For GAS GAS EC250 2024-2025

Installation Instructions:

1. Drain coolant and remove the original head.
2. Adjust the deck height as needed with different base gaskets. The deck height is the distance between the top of the cylinder and the top of the outer edge of the piston at top dead center (TDC).
   
3. Place the new head O-ring on top of the cylinder and ensure the locating pin is properly seated.
   
4. Insert the supplied 23 x 2.5 mm O-ring into the groove at the top of the combustion chamber insert. Place the outer “cap” part of the head over the insert, making sure the O-ring does not shift. Screw the spark plug into the insert by hand. Hold the spark plug firmly and lift the cylinder head assembly onto the cylinder. Carefully position the cylinder head, ensuring the locating pins are aligned and the O-ring stays in place.
5. Tighten the nuts/bolts in a crisscross pattern to the torque specified in the service manual. Reinstall the cylinder head onto the chassis mounting bracket.
   

Test Data:

• Test vehicle: 2024 KTM 250 EXC
  
• Operating time: 1 hour
  
• Raw compression: Approx. 170 PSI
  
• Compression with NICECNC part: Approx. 183 PSI
  
• Compression test data may vary between vehicles and operating times.
  

Disclaimer:

Nicecnc parts are not sponsored or endorsed by the brands the parts fit, nor are they affiliated with them, including KTM, Husqvarna, Honda, Yamaha, Kawasaki, Suzuki, Beta, GASGAS, Sherco, etc.