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  #21  
Old 02-14-2009, 04:57 PM
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wheres the picture?
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  #22  
Old 04-28-2009, 04:39 PM
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I dont see the pictures either but i think i get the idea on how to build one. But i have one question, how do you pressurize your motor? Tire pump, air compressor????
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  #23  
Old 04-29-2009, 08:18 AM
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Here's an updated thread that has pics. It's hard to remember all the threads that need to be changed when you switch hosts for photos. Use an air pump, you only need 6 psi.

Pressure-testing a 2-stroke - ThumperTalk
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  #24  
Old 09-18-2009, 09:47 PM
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i dont see the pics. i am thinking the valve stem is with the gauge to pressure the line. i have a rm 125 that is sucking oil into the cylinder and i changed the seal but it still leaks. this will be a great cheap way to check it. thanks faded.
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  #25  
Old 09-19-2009, 04:16 PM
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Default leak tester/ faded

i built one and got a valve stem from pep boys then drilled out a pvc 1/2 cap and put the stem thru it to pressure it. now the problem. it is a 1987 rm 125. when i put pressure to it the exhaust valve opens and lets the pressure out. does this mean it is pushing past the rings and i need to do the top end or is it something i am missing? thanks for any help.
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  #26  
Old 09-23-2009, 10:03 AM
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I would have to say yes, you are leaking past the rings. But first, are you checking with the piston at tdc? And also, if you are leaking oil into the cylinder and you replaced a seal, which seal did you replace? Clutch side or mag side?
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  #27  
Old 06-02-2011, 08:03 PM
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Quote:
Originally Posted by mylesc View Post
I've built this tester and have used it many times. Thanks again Faded for sharing! On my 97 CR250, I found that I needed to use a 1-7/8" expansion plug instead of the smaller one that Faded is running. 92-01 CR250's will probably all be this size.

Some other differences were that I used a 90 degree elbow 3/4" to 3/4" coupler. This allows me to see the guage easier. I also scrounged an air bulb/pump off an old office chair at work. It allows me to pump it up by hand and not have to use a bicycle pump.


This has got to be the absolute cleanest bike I've ever seen!! I would say it's never been riden, but I can see the wear marks from the chain gaurd.
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  #28  
Old 06-11-2011, 07:43 PM
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Love the Thread...I built and adapter to connect my Automotive cylinder leakage gauge with a built in pressure regulator to perform this task. I started with your basic blueprint using the schedule 40 PVC bushing with a 3/4 inner thread and a 1" long 3/4 pipe nipple and a 90 deg. galvanized elbow. Total cost of adapter about $9.00 and an expansion plug from Advanced Auto parts cost about $3.50. Haven't had a chance to try it out but it looks awesome. When I get a chance to hook it all together and get it on the bike I'll be sure to get some pics up.
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