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Two Stroke Top End Rebuilding – TSM Tech
Top-end rebuilding is the most frequent and costly service routine on two-stroke dirt bikes. Every year, dirt bike riders waste loads of money on top-end parts that didn?t need to be replaced, or make costly mistakes while performing repairs. This section will give you the dos and don?ts to easy top-end rebuilding, plus some tips that aren?t printed
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TSM Tech: Put a new style gas tank on your 96 to 01 YZ
If you are looking to freshen up your older YZ tank and shrouds, here’s how you do it. Tools needed for the conversion: Box cutter Hacksaw Hand files Center Punch Vice to hold it all 6.5mm Drill
Chassis Setup – Handling and Sag
The majority of off-road motorcycles have poor overall chassis setup. One of the major differences between a beginner’s bike and a factory rider’s bike is the experience & knowledge of the person performing the setup. Unfortunately many riders just ride their bikes with no thought of
Sprockets and Gear Ratio’s – What you should know
What Is Final Drive Ratio: The final drive ratio can be calculated by dividing the number of teeth on the rear motorcycle sprockets by the number of teeth on the front or countershaft sprocket. For an off-road dirt bike the result will typically range from approximately 3.5 to 4.5. This number represents
It’s easy to own a 144cc or 300 cc Two-Stroke!
One of our passionate readers started circulating a petition to the AMA to allow two-stroke race machines into the Pro ranks. His suggestion was to allow a 144cc two-stroke to compete in the 250F class and a 300cc two-stroke to compete in the 450F class. While it’s not the ideal many two-stroke
Can a Two Stroke run at 200:1 fuel/oil Mixture?
When someone says they can run their two stroke at 200:1 the first thing that happens is that people’s eyes go wide and they say “Huh?” It happens every time the Project Two 50 team mentions they are running a 200:1 mixture. Of course there are many that are skeptical. How can anyone
MICROBLUE Racing sponsors Project Two 50 -Results in Low Emission YZ250 Two-Stroke
One the biggest supporters and sponsors of Project Two 50 is our friend Craig LeClaire from Micro Blue Racing located in Rockford IL. His ideas, suggestions and input have taken our simple idea and turned it upside down. The original idea
Reader Rebuild – 2005 KTM 200 EXC
Here is the story of my rebuild of my 2005 KTM 200 EXC, twostrokemotocross.com inspired me to have a go and do it myself. Since starting racing as a 10 year old in 1984, I have had two dirt bike ambitions I really wanted to fulfil, first to ride a 500, second to rebuild my own motor. Well the first was
Engine Build HPP Valve Honda CR250 – Part 9
This is part nine and the final part of the CR250 engine build and will cover head, reed valve and carburetor installation. I will also perform the initial leak down test. Tools needed: Torque wrench, leak down tester, metric tool assortment Apply oil to the six cylinder head studs and install them into
Engine Build HPP Valve Honda CR250 – Part 8
This segment will cover piston, rings and cylinder installation and power valve adjustment. Tools required: Torque adapter, torque wrench, standard assortment of metric tools. Most people have rebuilt the top end of their ride so a lot of this information is old news. I am presenting the techniques
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