1997-2001 Honda CR250 – Bottom End Service – Part 3: Bearings Replacement
Changing the bearings is very easy; all your time will go into preparing the cases. These bearings are an interference fit, meaning the outside diameter of the bearings is slightly bigger than the inside diameter of the bore. The only way you can remove and install these bearings is by changing their sizes. Interference fit
1997-2001 Honda CR250 – Bottom End Service – Part 4: Assembly & Install
Before you begin, double check all mating surfaces, and use new gaskets, O-rings, and dowels. Give every bearing a coating of 2-stroke oil, and tape the splines of the crankshaft and transmission. Right Case: Install the crankshaft on the right side first. Assemble your crankshaft puller, and tighten the nut until the crankshaft is completely
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...
