1997-2001 Honda CR250 – Top End Rebuild – Introduction
How To Rebuild The Top End On Your 1997 - 2001 Honda CR250. I wanted to make this as easy to follow as possible, so I’ve broken the top end service into 15 steps that cover the removal, inspection, and installation of each component in order, followed by the leak down test and break in. In this article, we are going to cover what specialty tools and supplies you need, along with precautions and shop setup.
1997-2001 Honda CR250 – Top End Service – Part 1: Cylinder Head Removal
How To Remove The Cylinder Head On Your 97-01 Honda CR250The Tools You Will Need13/16 Inch Spark Plug Socket
Philips Head Screwdriver
14mm...
1997-2001 Honda CR250 – Top End Service – Part 2: Cylinder Removal
How To Remove The Cylinder On Your 97-01 Honda CR250The Tools You Will NeedMotion Pro Torque Wrench Adapter
3/8" Socket Wrench
17mm Socket
...
1997-2001 Honda CR250 – Top End Service – Part 3: Piston Removal
How To Remove The Piston On Your 97 -01 Honda CR250The Tools You Will NeedWrist Pin Removal Tool
Small Pick
Shop TowelPre-Service Notes...
1997-2001 Honda CR250 – Top End Service – Part 4: Exhaust Valve Removal
How To Remove The Exhaust Valve On Your 97-01 Honda CR250The Tools You Will Need4mm Hex Wrench
Needle-Nose Pliers
Snap Ring PliersPre-Service Notes...
1997-2001 Honda CR250 – Top End Service – Part 5: Piston Inspection
How To Inspect The Piston On Your 1997-2001 Honda CR250. The Tools You Will Need Are 4mm Hex Wrench, Needle-Nose Pliers, Snap Ring Pliers, Calipers, Telescoping Bore Gauges. This piston has perfect carbon build up, meaning the pre-mix ratio is correct, the carb is tuned right, and the transfer ports are flowing freely.
1997-2001 Honda CR250 – Top End Service – Part 6: Cylinder Head Inspection
How To Inspect The Cylinder Head On Your 97-01 Honda CR250The Tools You Will NeedPlastic Scraper
Soft Brush
Shop Towels
Spark Plug Thread...
1997-2001 Honda CR250 – Top End Service – Part 7: Cylinder Inspection
How To Inspect The Cylinder On Your 97-01 Honda CR250The Tools You Will NeedPlastic Scraper
Soft Brush
Shop Towels
Mechanics Straight Edge
Feeler...
1997-2001 Honda CR250 – Top End Service – Part 8: Exhaust Valve Inspection
How To Inspect The Exhaust Valve On Your 97-01 Honda CR250The Tools You Will NeedStiff Brush
Shop Towels
Parts Cleaner
Dremel
Calipers
Emery...
1997-2001 Honda CR250 – Top End Service – Part 9: Clearance Calculations
How To Calculate Top End Engine Clearances On Your 97-01 Honda CR250The Tools You Will NeedPaper
Pencil
MathBefore we can calculate clearances, we...
