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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Fogging for Mosquitos; Valve Guide Issues and Solutions
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<blockquote data-quote="greg brillus" data-source="post: 85061" data-attributes="member: 597"><p>For those that are unaware the opening for the tank breather on a "c" type upper frame is on the right side of the rectangular steel block where the oil return passageway is. The adjuster screw is a bleed from this return oil, same as a carb mixture screw. If you look down the filler neck at the right side of this steel block you will see a hole in the side of it, this is the vent line that runs to the rear of the upper frame where the T 29 screws in, then down the tube to oil the drive chain. I and a few others I know here at one time had this fitting blanked off all together, but we found at elevated speeds past say 80 mph, that oil would start coming out of the vent in the cap and all over the top of the fuel tank. This is what led me to believe that this vent should be left open, or perhaps extended via some flexible tubing out near the rear axle. I actually have mine connected via a "T" fitting with the engine breather on mine and it works fine.</p></blockquote><p></p>
[QUOTE="greg brillus, post: 85061, member: 597"] For those that are unaware the opening for the tank breather on a "c" type upper frame is on the right side of the rectangular steel block where the oil return passageway is. The adjuster screw is a bleed from this return oil, same as a carb mixture screw. If you look down the filler neck at the right side of this steel block you will see a hole in the side of it, this is the vent line that runs to the rear of the upper frame where the T 29 screws in, then down the tube to oil the drive chain. I and a few others I know here at one time had this fitting blanked off all together, but we found at elevated speeds past say 80 mph, that oil would start coming out of the vent in the cap and all over the top of the fuel tank. This is what led me to believe that this vent should be left open, or perhaps extended via some flexible tubing out near the rear axle. I actually have mine connected via a "T" fitting with the engine breather on mine and it works fine. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Fogging for Mosquitos; Valve Guide Issues and Solutions
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