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Engine Build HPP Valve Honda CR250 – Part 6
Part six of CR250 engine build. This is a short segment on the installation of the ignition components, countershaft sprocket, kickstart lever and ignition cover. To install the stator plate, match the mark at the bottom of the plate to the casting mark on the case Apply
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Engine Build HPP Valve Honda CR250 – Part 5
Part five of the CR250 engine build. This segment will cover the installation of the clutch pack, right side cover, power valve governor and water pump cover. Before installing the power valve governor, coat the throwout balls and the rack with a 50/50 mixture of moly 60 grease and transmission oil.
Engine Build HPP Valve Honda CR250 – Part 4
This is part four of the CR250 engine build and will cover the assembly and installation of the kickstarter, idle wheel and gear change mechanism. To assemble the shift pawls and springs, coat the springs, plungers and pawls with transmission oil. Insert the pieces into the shifter and place the completed
Engine Build HPP Valve Honda CR250 – Part 3
Part three of the CR250 engine build. This installment covers combining the two center cases, installing the seals, clutch lifter lever and primary gear. Tools needed: Case splitter or crankshaft installer/remover, engine stand, torque wrench and standard metric tool set. Now that you have installed
Engine Build HPP Valve Honda CR250 – Part 2
In part two of the CR250 engine build we will cover crankshaft, transmission and gear shift components. Tools you will need: crankshaft installer/remover, engine stand, service manual, circlip pliers and a typical metric tool assortment Tusk
Engine Build HPP Valve Honda CR250 – Part 1
This is part one of a nine part series documenting the assembly of a Honda CR250 engine. Round one includes the center cases and right side case cover. There are many ways to install bearings. These bearings were installed by heating the cases to 225 degrees in an oven (do not use a torch) and placing
Carburetor Theory and Tuning
The following article was found online, but without a byline showing the author’s name. Photos have been added to show what the text explains. If you know the author, please send a message so we can contact them, give them credit and thank them for their work. Intro Carburetor tuning has the greatest
Want to Build your own Aluminum Framed KX500? Benny Lindberg shows you how.
If your like me, when you see these works of art, these machines built from parts you wonder, just how the hell did they do that! The following pdf file will show you how Benny Lindberg built his own Aluminum framed wonder. Please keep in mind that English is not Benny’s first language, so some
KTM 300cc SXS ENGINE KIT FOR 250cc 2-STROKES
Looking for a bit more power from your KTM 250 SX? KTM has the answer for you. An engine kit that bolts right on to your existing bike that increases the displacement to 300cc. This kit is perfect for the vet motocross racer that wants a little more power out of their machine. Turn
Why 2-Stroke Direct Injection is a Big Deal
This article was written by Phil Mickelson at Snow Goer magazine. More in-depth information about fuel injection on two-strokes. While these are not motocross applications you can see how they could be adapted to MX bikes. When U.S. Environmental Protection Agency regulations for snowmobiles started