240 cc Yard Ripper Crate Engine

This 240cc crate engine is as follows with options available

72mmTall deck block

59mm Crank

Reinforced Aluminum Connecting Rod w/Bearing Inserts and .709″ Bushing Wrist Pin

72mm Flat Top Cast Racing Piston

Yard Ripper 3 .275 Cam

Shredder 18cc Racing Head with 28.5/25mm Valves, 26# Springs w/HD Steel Retainers

Champion Rocker Arms

7000 RPM Limited Ignition Coil

Die Cast Racing Flywheel

PZ27 27mm Slide Carb

7 bolt Side Cover

11:1 Compression 91+ Octane Recommended

Break in and options may delay shipping by up to 3 weeks depending on workload at the time.

Note: carb jetting at time of dyno was .050″ main and .022 pilot. Stock jetting at 900 feet above sea level and 60 deg F will be a little lean.

Note: Lately the shredder head castings have been coming in on the thin side where the breather passage to the intake port area is. This makes big valves and porting a challenge to not break through even if minimal material is removed. As a result on all ported castings, we will be plugging that passage, this will make external venting necessary (not optional). We feel that in doing this it will allow us to maintain our quality standards and put out an overall better product that will last longer with fewer issues during ownership.