by Michael Forrest

high performance motorized bicycle

my 2 stroke videos

Message to beginners

Engine Break-In Oils

3 Running Essentials: fuel/spark/compression

Different aftermarket chinese cylinders

an expansion chamber is essential for power

Should you modify your engine?

Suggestions for reliability and power

Mods for low RPM power

NT and Speed carbs

Available aftermarket carbs

Carburetor Jetting Tips

Why ethanol is bad for 2 strokes

Two main options for engine modification

Advice for racers and speed freaks

Software available for modifications

Ignition Timing and Spark Strength Improvement

Trouble shooting the ignition system

Improving the stock ignition system

Two-fold Vibration Cure

Info on Four-Stroking

Correcting the Transfer Ports

Improving low RPM power with Transfer Ramps

Porting and other power-enhancing engine changes

Increasing Cylinder Compression

Boost Bottles

Intake Extension for More Low RPM Power

Exhaust Extension for More Low RPM Power

All about Expansion Chambers

Stealth Silencer construction plans

Maximum Safe Cylinder Head Temperature

Reed valve intake

Upgrading your carburetor

Dellorto carburetor

Mikuni carburetor

Improving Crankcase Compression

long travel rear suspension

48cc/66cc engine perfected

48cc//66cc Porting

66cc substitute piston/rings

my motorized bicycling experience

How to make your own timing light

bike security

submitted pictures

My Facebook Forum

Bad Motorized Bicycle Forums

high performance motorized bicycle
My email:

Suggested reading: Two Stroke Performance Tuning   Two Stroke Tuners Handbook
Two Stroke Premix Oil Ratios by Gordon Jennings


George Wyman and the first motored vehicle to cross the USA (yr 1902):

George Wyman