Do Oil Pumps wear out? - Honda ATV Forum
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post #1 of 14 (permalink) Old 02-15-2011, 06:15 PM Thread Starter
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Do Oil Pumps wear out?

We are in the process of doing a rebore .25 top-end rebuild and cam chain replacement on a 2005 Rancher 400 with 8500 miles on it and I'm wondering If we should redo the oil pump too?
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post #2 of 14 (permalink) Old 02-15-2011, 06:56 PM
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I had one wear out on my old 300ex! There is a way to test if they are in spec yet. But probably would b a good insurance policy cuz mine took the cam, rockers, rod, piston, and rings all in one 10 minute ride down the road when my oil pump died. Not a fun time!

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post #3 of 14 (permalink) Old 02-15-2011, 07:01 PM
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Yeah I'd say while you are there may as well do it. I've never actually had one fail but if it does its catastrophic and you will be doing it all over again.

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post #4 of 14 (permalink) Old 02-15-2011, 07:49 PM
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I've never had one fail either, but they can. I would go ahead and replace it why I was in the engine.

Most 4-wheeler problems are caused by a loose nut connecting the handlebars and the seat!!

You only need two tools in life -- WD-40 and duct tape. If it doesn't move and should, use the WD-40. If it shouldn't move and does, use the duct tape.
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post #5 of 14 (permalink) Old 02-15-2011, 10:03 PM
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i agree..seeing how your gonna be inside the engine..now is a good time to replace the oil pump..better now..then later when your oil pump dies.

'89 trx350D foreman 4x4...'85 vf700c magna, '03 trx450fm foreman 4x4 , 2015 Yamaha waverunner fx cruiser ho, '05 trx500fm
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post #6 of 14 (permalink) Old 02-17-2011, 10:17 AM
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one simple thing to remember and I remind my boss all the time of this is if it moves it wears.
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post #7 of 14 (permalink) Old 02-17-2011, 10:48 AM
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Just wondering for future reference. How do you prime a new one? I don't see it in my manual for a TRX400EX or TRX450ER. Must not be required?

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post #8 of 14 (permalink) Old 02-17-2011, 06:09 PM
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Quote:
Originally Posted by my5sons View Post
Just wondering for future reference. How do you prime a new one? I don't see it in my manual for a TRX400EX or TRX450ER. Must not be required?
No need to prime, it will be sitting in oil anyway.

Most 4-wheeler problems are caused by a loose nut connecting the handlebars and the seat!!

You only need two tools in life -- WD-40 and duct tape. If it doesn't move and should, use the WD-40. If it shouldn't move and does, use the duct tape.
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post #9 of 14 (permalink) Old 02-17-2011, 07:45 PM
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On my 450ER, there is a pickup with screen. Seems odd that it doesn't need primed, but I believe you. Thanks!

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1996 TRX300FW - ITP Mudlites Warn XT25 (Current Project)
2001 Suzuki LT A50
2003 TRX300EX
2006 Polaris Sportsman 90 - 2 inch lift
2006 TRX250EX - Maxxis Razrs
2007 Suzuki King Quad 700 4x4 - ITP Mudlite XL
2008 TRX450ER - No Lid, HRC Kit, 162 Main, 45 pilot, 55 leak jet

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post #10 of 14 (permalink) Old 02-17-2011, 07:48 PM
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Quote:
Originally Posted by my5sons View Post
On my 450ER, there is a pickup with screen. Seems odd that it doesn't need primed, but I believe you. Thanks!
Not too familiar with the 450R/ER, but I haven't seen an oil pump in an ATV that had to be primed yet.

Most 4-wheeler problems are caused by a loose nut connecting the handlebars and the seat!!

You only need two tools in life -- WD-40 and duct tape. If it doesn't move and should, use the WD-40. If it shouldn't move and does, use the duct tape.
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