Kawasaki KLX110 Complete Sleeper Engine – 155cc / 177cc / Race Ready
The ultimate hidden weapon for your KLX110 build. On the outside, it looks like a bone-stock 110… but inside, this engine is a precision-built powerhouse with serious displacement. Perfect for riders who want to keep the stock appearance while enjoying the thrill of a big-bore upgrade.
Available Configurations:
155cc Sleeper Engine (60mm bore)
177cc Sleeper Engine (64mm bore)
Race Ready Sleeper Engine – Stock look, full race heart
What You Get:
Complete OEM-based KLX110 engine, fully rebuilt and upgraded
Overbored cylinder & piston kit matched to displacement
Modified OEM cylinder head for proper clearance and performance
Fresh bearings, gaskets, seals, and hardware throughout
Assembled, tested, and ready to drop in
New HD Clutch & High Flow Oil Pump
Race Ready Option Includes:
High compression ratio setup (for race gas use)
Advanced head mods & porting for maximum flow
Lightened components for quicker revs and sharper throttle response
All while retaining the stock exterior look
Why It’s a Sleeper:
Maintains the OEM appearance—no flashy aftermarket parts
All the performance is hidden inside
Reliable for hard use, racing, or surprising anyone who lines up next to you
Notes:
Engine comes ready to bolt in and run
Break-in procedure recommended for maximum longevity
Race Ready option requires race fuel for proper operation
The stock look everyone recognizes—backed by the performance nobody expects.
For closed-course competition use only. Not legal for use on street vehicles or emissions-controlled vehicles in California.
Kawasaki KLX110 Sleeper Motor
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Please ship engines in a Walmart Igloo cooler (works best for protection during transit).
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No oil in the engine—must be fully drained.
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Clean engines only. Dirt, oil, and residue must be removed before shipping.
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Surcharges may apply if engines arrive dirty, oily, or not properly prepared.
Following these guidelines ensures safe transport and avoids additional cleaning or handling fees.
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