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225cc Tillotson RS  Big Bore Race Engine
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225cc Tillotson RS Big Bore Race Engine

1 Reviews
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$910.00
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Product Code: 225BIGBORETILLY
Usually Ships in 1 to 2 Business Days
New From Studz racing! Our 225cc Big bore Tillotson racing Engine. The First in Our New Line Of "big Bore" Racing series of Engines. This Engine is Bored out to 225cc's (72mm), 68mm to 70mm Is Standard Bore Size There is no Replacement For Displacement!!!
Bigger Bore Means More power! Approx. 17+ HP, Great Upgrade For Any Mini Bike Or Go Kart project, Tillotson Racing Engines Are known For Quality, Longevity, Upgradability, and performance.

Engine Break Down
  • 72mm Tillotson Racing Block (no governor or oil sensor, extra webbing, bracing, and thicker material is built into the casting producing a superior block to any other)
  • Bore : 72mm / 2.835"
  • Crank :55mm / 2.165"
  • 265 Lift Tillotson Racing Cam (wide power band, great for mini bikes and yard-karts, equipped with compression release)
  • 22mm Aftermarket Jetted Mikuni small round slide Carburetor (some adjustment may be required)
  • Forged Rod with bearings
  • Light weight, Hypereutectic, Flat Top Racing Piston
  • Tillotson Racing Head
  • 27mm, 5mm stem, Intake Valve
  • 25mm, 5mm stem, Exhaust Valve
  • 26lb Racing Valve Springs
  • Heavy Duty Retainers with Automotive style keepers
  • non limited ignition coil
  • Lightweight Cast Alum Flywheel (tested to 10k)
  • Advanced Timing Key12 Degree

CAUTION!!!! These engines are shipped with NO OIL. We recommend a high quality oil designed for splash oil systems such as AMSOIL 4T to provide better protection. Always keep 16 ounces of oil in the engine while in use. *Block does not have tabs for mounting a fuel tank.
NO WARRANTIES OR EXCHANGES ON ENGINES. ENGINES DO NOT SHIP WITH OIL IN THEM
break in will be required!!

Note: Accessories & options are not installed and shipped loose.
MOTORS SOLD FOR ORGANIZED COMPETITION PURPOSES OR EXPORT ONLY. (NOT FOR USE ON ANY EQUIPMENT, OFF ROAD, RECREATIONAL, OR EMISSIONS CONTROLLED. APPLICATIONS. DOING SO IS A VIOLATION OF FEDERAL LAW)

Reviews

Average Rating:
( 1 )
Rubin Thomas from Westminster, CO United States
August 8, 2025
Studs Racing is the shit they are the very best
These guys are some of the best people I’ve ever dealt with guarantee to get you your shit they sell really good equipment and the prices aren’t bad at all. I give these guys 10 stars for service and my all-around experience with them. Eric Shingles is the man for sure. if there’s an issue with shipping, they call you and let you know give you a couple of options. Let you know what they can
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