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My 91 evo makes a mess

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Old Jun 9, 2022 | 04:38 PM
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Default My 91 evo makes a mess

My 91 evo makes a mess with oil eveytime l start it up?
 
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Old Jun 9, 2022 | 05:00 PM
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Makes a mess how, where? How often do you start it?
 
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Old Jun 9, 2022 | 05:09 PM
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Rework the check ball in the oil pump. It prevents the oil bag from running back into engine.

Most are successful in taking a small brass rod and after cleaning port, tapping ball with rod with a hammer . Be gentle. You may need to get a new ball. Hot melt stick the old one and lap seat with fine clover.

I would remove pump yo do that and clean it.

If you use just s tad of clover, you can probably clean it on bike.
 
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Old Jun 10, 2022 | 10:16 AM
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Default (Weekend warrior) oil mess

Originally Posted by Dr.Hess
Makes a mess how, where? How often do you start it?
hi l ride on weekends basically and it sits a week before starting. This oil lk starts after l starting up directly after start up. Thsnks
 
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Old Jun 10, 2022 | 10:19 AM
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Default Oil mess

Originally Posted by RIPSAW
Rework the check ball in the oil pump. It prevents the oil bag from running back into engine.

Most are successful in taking a small brass rod and after cleaning port, tapping ball with rod with a hammer . Be gentle. You may need to get a new ball. Hot melt stick the old one and lap seat with fine clover.

I would remove pump yo do that and clean it.

If you use just s tad of clover, you can probably clean it on bike.
Thanks for the reply l will try n locate the check valve have tried to find it in the past with no luck. Appreciate your time
 
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Old Jun 10, 2022 | 10:20 AM
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If you check the oil before you start it it probably shows low as it leaked down into the crankcase. Odds are if you fill the oil to full mark before ride it will be over-filled at the end of your ride.

As has already been stated, check ball is leaking.,
 
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Old Jun 10, 2022 | 11:07 AM
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Originally Posted by chaz976
Thanks for the reply l will try n locate the check valve have tried to find it in the past with no luck. Appreciate your time
The oil pump is located on the right side of the engine, toward the rear:



The oil pump itself is put together like this. The parts you're interested in are shown in red:








 
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Old Jun 10, 2022 | 12:18 PM
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Default Oil mess

Originally Posted by 0maha
The oil pump is located on the right side of the engine, toward the rear:



The oil pump itself is put together like this. The parts you're interested in are shown in red:

Thanks a bunch for the diagrams and help. I will do the check ball first off
 
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Old Jun 10, 2022 | 12:33 PM
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Originally Posted by chaz976
Thanks a bunch for the diagrams and help. I will do the check ball first off
When you remove that plug, oil in the tank will gravity feed thru the gears and up thru that opening so drain the oil first, else you'll have a major mess.
 
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Old Jun 10, 2022 | 12:36 PM
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Get a new spring and check ball, your's is old enough the springs lost tension. Common issue on older bikes, shovels are notorious for it.
 
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