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 Post subject: Oil pump check valves
PostPosted: Wed Oct 10, 2018 6:55 pm 
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Joined: Fri May 09, 2008 8:56 pm
Posts: 1701
Location: Houston, Texas
Looking for a few check valves. Developed two stroke leak and pretty sure one of the valves cracked again. If you have any take a look that they are not cracked with magnifying glass to save any inconvenience.


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 Post subject: Re: Oil pump check valves
PostPosted: Tue Oct 16, 2018 12:21 am 
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Located some. Poor shop organization. Should of kept them with the pump. Down to two.


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 Post subject: Re: Oil pump check valves
PostPosted: Tue Oct 16, 2018 1:19 am 
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Joined: Sat Feb 04, 2012 7:36 am
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Location: Eastern Ontario Canada
Paul

I'm still trying to find a proper sized fitting to replace the stock check valves. Install the fitting, attach hoses, use inline check valves. That solves the external and internal leaking problems. Perhaps the solution is to have a machinist make them. All you need is a stock check valve to get the thread size and also the hole i.d and o.d.

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1985 RZ500 1GE Spec
1985 RZ500 47X Spec Project Bike
1986 RG500 ATR
1986 NS400R
1987 TZR250
1988 Honda RC31
2007 DL650 VStrom
2014 Triumph Thruxton Modified


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 Post subject: Re: Oil pump check valves
PostPosted: Thu Oct 18, 2018 9:54 am 
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That is what I thought. I do not know if it is the track riding causing the cracks. I do have a few miles on the bike but not a constant 10k running.


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 Post subject: Re: Oil pump check valves
PostPosted: Thu Oct 18, 2018 2:51 pm 
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This may be a good place to start. https://www.ebay.ca/itm/183268513703?va ... Track=true

I'll do some digging when I have time.

_________________
1985 RZ500 1GE Spec
1985 RZ500 47X Spec Project Bike
1986 RG500 ATR
1986 NS400R
1987 TZR250
1988 Honda RC31
2007 DL650 VStrom
2014 Triumph Thruxton Modified


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 Post subject: Re: Oil pump check valves
PostPosted: Thu Oct 18, 2018 5:08 pm 
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Joined: Fri May 09, 2008 8:56 pm
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Thanks. Just a #10 screw. The inline valves work fine. The brass that cracks is the outer portion all the way to the the 10 millimeter portion. The metal is just thin. You would think it is designed to last more than 35 years. :grin:


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 Post subject: Re: Oil pump check valves
PostPosted: Thu Oct 18, 2018 9:45 pm 
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Location: Eastern Ontario Canada
The metal is very thin, but I haven't heard about cracks in that location before, but I've only been here a short time. The failures I've seen including my own, which was self induced, have been where the threads meet the 10 mm hex.

I'll have to measure again. I can't remember what size thread it is. M5?


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Oil Pump Checkvalve Installation 004.JPG
Oil Pump Checkvalve Installation 004.JPG [ 153.22 KiB | Viewed 45 times ]

_________________
1985 RZ500 1GE Spec
1985 RZ500 47X Spec Project Bike
1986 RG500 ATR
1986 NS400R
1987 TZR250
1988 Honda RC31
2007 DL650 VStrom
2014 Triumph Thruxton Modified
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