89 Suzuki DT75 oil check valuve

[Skeeter#2]

Anybody know how to check these? Or how to test the oil pump? The #3 cycl line has a single oil check valuve on the line from the pump. We cleaned the carb's then added 8oz oil to 6gal fuel for the test on the muffs and for precaution. After mild testing, checked #3 plug seems light to dry of oil and had no oil ring on the head where the plug seats.. #1 & #2 plugs removed had good and equal oil ring on the head at the plug seat. A normal thing to find after good run. Seems that #1 &2 have evidence of good oil to cyclenders,,, am concerned about the #3.

 

[Skeeter#2]

Re: 89 Suzuki DT75 oil check valuve

Anybody know how to check these? Or how to test the oil pump? The #3 cycl line has a single oil check valuve on the line from the pump. We cleaned the carb's then added 8oz oil to 6gal fuel for the test on the muffs and for precaution. After mild testing, checked #3 plug seems light to dry of oil and had no oil ring on the head where the plug seats.. #1 & #2 plugs removed had good and equal oil ring on the head at the plug seat. A normal thing to find after good run. Seems that #1 &2 have evidence of good oil to cyclenders,,, am concerned about the #3.

Thanks Stan the Suzuki man it tested good. Removed it from the oil line and used a syringe to draw/ allow oil through and check to see that of will not allow oil to push or flow back to oil pump. Also added the other 8oz oil to the tank and opened the pump setting another 1/2 turn. Did a drip test on the line and oil flowing fine. Will compare to the others later... .