Oil issue
HDF Community Team
Joined: Dec 2005
Posts: 5,441
Likes: 2,637
From: NC USA
It is possible under one of two conditions. Either the pressure relief valve is stuck wide open (or spring missing) or the feed gears aren't pumping due to a sheared key.
Either way, need more info as in - is the oil light on when running?
How long has it run returning oil without adequate (or any) oil pressure?
Have you visibly looked into the tank to see the oil actually moving?
Year and bike model would be of some help also.
Either way, need more info as in - is the oil light on when running?
How long has it run returning oil without adequate (or any) oil pressure?
Have you visibly looked into the tank to see the oil actually moving?
Year and bike model would be of some help also.
Thread Starter
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3rd Gear
Joined: Jun 2023
Posts: 7
Likes: 0
From: IL
It is possible under one of two conditions. Either the pressure relief valve is stuck wide open (or spring missing) or the feed gears aren't pumping due to a sheared key.
Either way, need more info as in - is the oil light on when running?
How long has it run returning oil without adequate (or any) oil pressure?
Have you visibly looked into the tank to see the oil actually moving?
Year and bike model would be of some help also.
Either way, need more info as in - is the oil light on when running?
How long has it run returning oil without adequate (or any) oil pressure?
Have you visibly looked into the tank to see the oil actually moving?
Year and bike model would be of some help also.
Road Master
Joined: Mar 2012
Posts: 1,051
Likes: 1,001
From: Ohio
Evo motors are known for the oil pump check valve (5/16" ball bearing) to allow oil past it when the bike sits for a long time. The crankcase will fill with oil, and then when it's ridden, the excess oil goes back to the tank.
The solution is to lap the check valve seat so that the ball bearing will seal better. It's also possible it won't do it again unless it sits for a long time.
Your tricking, it may just be that the lifters needed adjusted. But you have to isolate where the noise is coming from. Do you have an oil pressure gauge or oil pressure light on the bike? First place to start is see how much pressure you have.
The solution is to lap the check valve seat so that the ball bearing will seal better. It's also possible it won't do it again unless it sits for a long time.
Your tricking, it may just be that the lifters needed adjusted. But you have to isolate where the noise is coming from. Do you have an oil pressure gauge or oil pressure light on the bike? First place to start is see how much pressure you have.
Thread Starter
|
3rd Gear
Joined: Jun 2023
Posts: 7
Likes: 0
From: IL
Evo motors are known for the oil pump check valve (5/16" ball bearing) to allow oil past it when the bike sits for a long time. The crankcase will fill with oil, and then when it's ridden, the excess oil goes back to the tank.
The solution is to lap the check valve seat so that the ball bearing will seal better. It's also possible it won't do it again unless it sits for a long time.
Your tricking, it may just be that the lifters needed adjusted. But you have to isolate where the noise is coming from. Do you have an oil pressure gauge or oil pressure light on the bike? First place to start is see how much pressure you have.
The solution is to lap the check valve seat so that the ball bearing will seal better. It's also possible it won't do it again unless it sits for a long time.
Your tricking, it may just be that the lifters needed adjusted. But you have to isolate where the noise is coming from. Do you have an oil pressure gauge or oil pressure light on the bike? First place to start is see how much pressure you have.
HDF Community Team
Joined: Dec 2005
Posts: 5,441
Likes: 2,637
From: NC USA
so I bought the bike at auction a month or so ago. 2005 fatboy special construction is what the title says. The bike is more like a late 90s frame and I believe it's a evo clone engine. They said that it had been sitting for some time and the oil was supposedly just changed but the low oil light had been on since the change. I put about 150 miles on it just short 10 mile or so rides. I check the oil again yesterday and it was ok. Rode about 10 miles to work then 8 hours later ride home 10 miles. Noticed when pulled in garage it was tapping. Shut it down checked oil now there more oil in the tank then previously and no movement of oil in tank.
Hard to say for sure since it's a pieced together bike. Does sound like oil pump failure though. If you can post a photo of each side of the bike it'd help with suggestions as to exactly what to check and where. (oil sender location, what engine it may be, oil tank or pan, etc) Probably can't identify everything as to what it was built from, but get you close.
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HDF Community Team
Joined: Dec 2005
Posts: 5,441
Likes: 2,637
From: NC USA
Without knowing some particulars, suggestions and ideas will confuse you and anyone else trying to help.
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Road Master
Joined: Mar 2012
Posts: 1,051
Likes: 1,001
From: Ohio
I said, LAP, not TAP. Some may do that, but I don't. It may not sump oil again unless it sits a long time.
I'd suggest investing in a service manual that covers the Evo motor.
