Notice: Product Images may differ from the actual product. Image may be a representation of this item.

JE, Suzuki, 77.00 mm Bore, 1 Cyl. Kit

Your Price: $309.99

SKU: 299245

In Stock

JE, Suzuki, RMZ250 – Pro-Series, 14.20:1, 77.00 mm Bore, 1 Cyl. Piston Kit

As the leader in forged racing pistons, JE Pistons has applied over 75 years of experience to its wide range of Pro Series pistons for dirt bike and motorcycle engines. Engineered, forged and machined 100% in the USA, JE Pro Series pistons are designed for each specific engine and racing application with input from professional-level teams and racers. From motocross to off-road and everything in between, JE Pistons’ Pro Series are the ultimate forged piston choice for motocross and off-road competition.

  • Forged in the USA using 2618 aluminum, yielding high tensile strength needed for high-demand performance applications
  • Race-inspired two-ring design promotes quick revving and throttle response for noticeable power
  • Designed specifically for each engine and use application to provide optimized performance durability
  • Proprietary Forged Side Relief (FSR) forging design minimizes friction and power loss with reduced skirt width and saves additional weight with a shorter wrist pin
  • Includes high-quality wrist pins, locks, and JE Pro Seal premium piston rings
  • Made 100% in the USA

GTIN: 00193564220448

Piston Series

Pro Series

Cylinder Head

RMZ 250

Bore Diameter

77.00 MM

Compression Ratio Actual


Piston Head Type


Piston Volume

-2.30 CC

Piston Material


Forging Type


Piston Average Weight

151 GR

Ring Set Included


Top Compression Ring Thickness

0.0320 IN

Oil Ring Thickness

0.0585 IN

Wrist Pin Material

9310 Nickel Carbon Steel Alloy

Wrist Pin Outer Diameter

0.630 IN

Wrist Pin Wall Thickness

0.120 IN

Instructions: Enter a value in the un-shaded boxes below as they pertain to your engine.
Note: For pistons BELOW the block @ TDC – value in box must be a NEGATIVE number (-0.000)
Note: For pistons ABOVE the block @ TDC – value in box must be a POSITIVE number (0.000)
Note: For a DISH piston – value in box must be a NEGATIVE number (-0.0)
Note: For a DOME piston – value in box must be a POSITIVE number (0.0)
Note: Manipulate the DOME/DISH & PISTON to DECK volumes to get the ratio you want.
Enter the number of cylinders of your engine
Finished bore of your engine
Stroke of your engines crankshaft
Rod Length
Ctr. to Ctr. length of your connecting rods
Gasket Bore
Head Gasket bore diameter
Comp. Gasket
Compressed Head Gasket thickness
Block Deck Height
Center of main bearing bore to top of block
Top Ring Down
Top of 1st ring to top of pistons(FLAT)
Chamber Volume
Cylinder Head chamber volume in CC’s
Dome/Dish Volume
DOME (-) or DISH (+) vol. (theoretical) in CC’s
Piston to Deck
Top of BLOCK to top of piston (FLAT) @ TDC
Click “Calculate” for dimension results.
Total Volume
Cylinder Volume
Total cylinder volume in CC’s =
Clearance Volume
All effective vol. above block deck @ TDC in CC’s =
Gasket Volume
Volume of your head gasket in CC’s =
Top Ring Volume
Total volume above the top ring @ TDC in CC’s =
Deck Volume
Volume of area above the pistons @ TDC in CC’s =
Piston Top Land
Piston top land diameter for volume calculations =
1/2 Stroke
1/2 stroke of your engine’s crankshaft in inches =
Compression Ht.
Ctr. of piston pin to top of piston (FLAT) in inches =
Cubic Inches
Cubic inch displacement of your engine =
For the given dimensions, your compression ratio