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Oil smells like gasoline….still

825 Views 20 Replies 8 Participants Last post by  B40dash8
Hey all. I’m currently finishing up the clutch on the 450. The oil still smells like gas. I haven’t even rode the bike and the fresh oil smells like gas. It’s just been idling and moving it around here and there with it running.

I smell the inside of the engine from the area where the balance chain is with the clutch cover off and it smells like gas 😡😡. When the bike was apart I polished the float seats in the carbs but I guess that didn’t work. Are my float needles the culprit of this? I am still using the original petcock that only draws fuel in from the tank with vacuum from the engine. That isn’t leaking fuel when the bike is off. I really don’t know what else it could be. I’m literally sitting next the oil I drained out of the engine along with the bike with the cover off and it is just giving off fumes of gas. I don’t even want to put oil in the bike and just contaminate new fresh oil at this point but I also want to see if the clutch will work correctly.
Any things to look for or check? Thanks

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Did you rebuild the carbs with chinese float needle ? we just had that problem with a recently bought 450 rebel.
It ran extremely rich. Repaired that with Honda parts of a CB 450 s.
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The 450 s had overflow tubes... the cmx did´nt.
CMX 450.. sorry had no Overflow tubes....
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Did you check the position of the piston Rings ? They can be positioned 180 degrees
up side down. This can lead to increased blow-by gases.(& therefore gasoline in Oil).
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