Section » Tech
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 the transmission gears, crankshaft and gear shift
More Articles
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
TM Racing to release 125cc fuel injected two stroke!
Some wonderful news from Italy today. As some of you may know the 2010 World GP series is adding a European 125cc two-stroke class to a half a dozen GPs next year. And TM Racing has four young racers that will be competing in the new series. TM Racing factory team manager Patrick Heyden says “80%
Is it Time for a Diet? FMF KTM300 Project Bike
The folks over at FMF are always looking for new and better ways to improve bikes. This time they decided to try their hands at getting the weight of a KTM300 down under 200lbs. The specifications from KTM offer a dry weight of 221.34ibs… so add some oil and gas the bike ballons up over 230lbs. Over
2000cc V4 Two Stroke Engine?
Imagine having at your control the power of 2,000cc’s of two stroke power! Well a group down in New Zealand has commissioned an engine for a special purpose. From the video below it appears that the motor uses 4 Honda CR500 cylinders to create the V4 configuration. Most people after watching the
