Keihin cr special carburetor tuning manual high school

Time for an upper engine tear down, which IВ cover as a step-by-step HD video: Click here to see theВ how-toВ series at the 4WD Mechanix HD Video Network'sВ freshly launched 'The Off-Road Motorcycle Channel'. ( Click here to view the HD video how-toВ procedure and results!) The leak down test pinpointed leaking intake and exhaust valves a look inside the cylinder (through the spark plug hole) alsoВ indicated scoring atВ the upper wall of the Nikasil cylinderВ plating. My next step was a cylinder leak down test, which I have covered in detail with an HD video how-to feature. (To assure an accurate reading, makeВ sure the auto-decompression mechanism is not holding the valves openВ when performing a compression test!) A heavy cardio workout later, it was apparent that the compression was lacking.В I did a quick compression gauge check and discovered a 95 PSI cranking compression issue.

Consulting twoВ friends with XR650Rs, I assumed that my starting technique was the culprit. An honest and forthrightВ previous owner could not start the engine,В andВ given the mileage, we agreed that the problem was staleВ winter (ethanol)В fuel-which had eaten up the plastic tank screen! I trailered the cycle home and looked forward to restoring the fuel system and completing the dual-sport conversion process.В The motorcycle will be an HD video shooting platform for remote backcountry documentary filming and off-pavement event coverage, so the XR650R's low mileageВ seemed a huge asset.ДЄfter 20 hours of prepping the cycle for a Nevada dual-sport inspection, including someВ minor tuningВ and checking out the bike's general condition, I discovered thatВ the 650 thumper engineВ would not start. The magazine recently purchased a 2000 Honda XR650R motorcycle with less than 1000 original miles on the bike.

Keihin cr special carburetor tuning manual high school