Genuine Honda GX120 Only Piston Rod Wrist Pin Clip 13mm 90551-ze0-000

90551-ze0-000 Genuine Honda GX120 Only Piston Rod Wrist Pin Clip 13mm.

Genuine Honda GX120 piston rod wrist pin clip designed for precise engine assembly and reliable performance. This OEM 13mm clip (part number 90551-ze0-000) secures the wrist pin connection with exact specifications matching Honda's engineering standards. Essential for maintaining proper piston rod alignment and preventing component separation during operation. Compatible exclusively with GX120 engines. 

• Compatibility: This part is compatible with only the GX120 engine.
• Dimensions: 13mm for pin dia 12.99mm Dia (.510”), with tapered ends. Holds Piston pin in piston

USAC 120 Rules

Connecting Rod Rules

1. Factory Supplied:

   • The connecting rod and its fasteners must be Honda factory-supplied and used without any modifications, except for honing the big end bore.

2. Specifications:

   • Crankshaft bore size: 1.021” minimum; 1.0265” maximum.
   • Wrist pin end bore: 0.5111” reference.
   • Length: From the bottom of the wrist pin bore to the top of the crankshaft bore must be 2.111” maximum; 2.101” minimum.
   • Weight: Connecting rod with bolts must weigh at least 118 grams.

3. Prohibited Modifications:

   • Oil grooves on the bearing surfaces of either of the connecting rod bores are not permitted.

   • No other modifications to the connecting rod or fasteners are allowed.

Wrist Pin Rules

1. Factory Supplied:

   • The wrist pin and retainer must be Honda factory-supplied and used without any modifications.

2. Specifications:

   • Outside diameter: 0.510” reference.
   • Inside diameter: 0.354” reference.
   • Length: 1.844” minimum; 1.850” maximum.
   • Weight: 25 grams minimum.

These rules ensure that the connecting rod and wrist pin remain within factory specifications and are not altered to gain an unfair advantage.