Question about Harley Davidson FLSTC Heritage Softail Classic Motorcycles
Hi Ghaley1, oil leaking from your air cleaner is caused by oil carryover from the engine. For what ever reason the breather system is not seperating enough oil mist and air from the piston downstroke. There are cheap and quick easy fixes and there are more exspensive ones. Start by trying the following:
1. Run your oil level half way between the add and full mark when hot.
2. Run oil breather lines from head into a TEE fitting below carb/induction module then a single line into a mini filter under frame.
3. Purchase Arlen Ness Super Sucker.
4. Replace umbrella valves and realign oil pump
5. Upgrade oil pump and cam plate
Posted on May 28, 2015
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Posted on Jan 02, 2017
SOURCE: oil blow out the breather
An overfull oil tank will do it. Even if not overfull just about all harley's will blow oil out the air filter. Unless there is a bunch of oil coming out, it's not a problem What I've found is that the air filter eventually gets saturated and then starts to leak through. The level in the oil tank doesn't seem to matter. If you change the air filter the problem goes away, until the new one gets saturated and then it starts all over again. My plan is to get a K&N air filter, which you can clean yourself and save having to buy a new air filter every 4,000 miles or so.
Posted on Nov 20, 2008
ther is a chance that being over filled will blow out of the crank breather so drain off to the correct level if then the bike still does this then you have to high crank presure meaning the bore and piston/rings are badly worn
Posted on Jun 23, 2009
Was this your first time changing the oil?
Sounds like you may have drained the tranny and
over-filled the motor......
Did you have a book/ manual?
Posted on Sep 11, 2009
Mate.Sorry to tell you but the piston rings need replacing.If the motor is pulled down the piston rings will be very thin and need replacing.Possibly with a new piston as well.Seen this before.Its not too bad cost wise,but it does need to be done.Hope this helps
Posted on Oct 07, 2009
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