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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Alton Generator
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<blockquote data-quote="Gary Gittleson" data-source="post: 107565" data-attributes="member: 3625"><p>I've been running mine lately with just the oil thrower (on an Alton) and a bit less oil in the primary; just enough to cover the bottom run of the chain. Nothing seems to be coming out of there. I should add that I have a D, with the breather on one valve cover. I put that over the front intake valve, connected to a one-way valve and hose leading down to the bottom and out the back. The end of the hose is always dry. The previous owner had drilled and tapped the magneto inspection cover and placed a one-way hydraulic vale there with a little tube pointing downward. I left it because it seemed quaint. So I have two one-way breathers. I was also experiencing some oil blowing out of the oil tank cap. I made a diverter for the return but it didn't help. I assumed it was caused by pressure buildup in the tank. So I drilled and tapped the rear cylinder exhaust valve cap to accept a small brass pipe and connected that to a hose going the chain oiler outlet to allow the pressure to pass to the engine and be consumed by the one-way breathers. Whatever oil is also delivered over the valve drops down into the engine. This seems to have worked. My bike is a "D" Rapide, so the tank is on the side. Neither of the breather valve covers is visible without very careful inspection under the fuel tank and the hoses are tucked away pretty well.</p><p></p><p>After several thousand miles in this configuration, everything is quite dry. It does leave a spot of oil after resting for a few days, no bigger than an inch in diameter, coming from under the gearchange cover. I haven't tracked that one down yet. The valve lifter cable area is dry.</p></blockquote><p></p>
[QUOTE="Gary Gittleson, post: 107565, member: 3625"] I've been running mine lately with just the oil thrower (on an Alton) and a bit less oil in the primary; just enough to cover the bottom run of the chain. Nothing seems to be coming out of there. I should add that I have a D, with the breather on one valve cover. I put that over the front intake valve, connected to a one-way valve and hose leading down to the bottom and out the back. The end of the hose is always dry. The previous owner had drilled and tapped the magneto inspection cover and placed a one-way hydraulic vale there with a little tube pointing downward. I left it because it seemed quaint. So I have two one-way breathers. I was also experiencing some oil blowing out of the oil tank cap. I made a diverter for the return but it didn't help. I assumed it was caused by pressure buildup in the tank. So I drilled and tapped the rear cylinder exhaust valve cap to accept a small brass pipe and connected that to a hose going the chain oiler outlet to allow the pressure to pass to the engine and be consumed by the one-way breathers. Whatever oil is also delivered over the valve drops down into the engine. This seems to have worked. My bike is a "D" Rapide, so the tank is on the side. Neither of the breather valve covers is visible without very careful inspection under the fuel tank and the hoses are tucked away pretty well. After several thousand miles in this configuration, everything is quite dry. It does leave a spot of oil after resting for a few days, no bigger than an inch in diameter, coming from under the gearchange cover. I haven't tracked that one down yet. The valve lifter cable area is dry. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Alton Generator
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