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Sportster Motorcycle Suspension, Frame, Forks, Handlebars, Fuel Tank, Oil Tank, Fenders Discuss Sportster Motorcycle Suspension, Frame, Forks, Handlebars, Fuel Tank, Oil Tank, Fenders problems, advice, and/or how tos.

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  #11  
Old 1 Week Ago
Wiktor Wiktor is offline
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Sportster/Buell Model: XL1200C
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Well I’m using my phone and can’t figure out how to post a pic. Don’t hear a sizzle or anything. Just oil on the top of the tank and drains off the left side when bike is leaned over on stand. Frame over vent has oil on it too which makes me think it is coming out of the vent.Vent hose has no kinks that I can see.
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  #12  
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That don't make sense.
It ONLY drains to the left side?
Have you checked the seal on the cap?

Some use tapatalk to upload pics. Don't know how that works.
Normally you upload pics to a pic hosting site and copy the image code into your posts.
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  #13  
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Wiktor Wiktor is offline
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It is really weird! Vent is on the right side though and then it just drains to the left when on the kickstand I guess? Only leaks when I ride it.. I put a new cap with a temp gauge because I also wondered about that.
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If the tank is building pressure with the relief valve in place and the return moved away from the vent (04B), and the tank ain't cracked (clean everything, spray with women's deodorant watch for color change) and there is no oil in front of or below the tank (from the motor or transmission vent), you start tracing back to the motor from the tank.
Check for no kinks or cracks in the tank lines (sometimes the rubber lines implode from the inside). Check the tranny vent line for wet spots. Remove the tank vent line and blow thru it to make sure it's not clogged.
If all that works out, replace the crankcase breather valves in the rocker boxes.

Without pics, it's shooting fish in a barrel from here.

You can pull the tank and pressure test it.
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  #15  
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Wiktor Wiktor is offline
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Thank you so much for the help! I’ll try all of that. I would send pics but can’t figure how to post the on here from my phone. It definitely is the tank that’s leaking from the top, I guess I’ll be pulling hoses!
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