I had an issue with the 2 stroke oil injection on the Suzuki where there were intermittent bubbles inside the pipes on the left hand cylinder. There was obviously a leak somewhere and on investigating I could see there was some oil weeping out at the pump end of the pipe assembly.
To get to the pipe banjo on the oil pump the right hand carb has to be removed, in fact it's easier to remove both carbs. I removed the carbs and tried tightening the banjo bolts, all 3 bolts (the RH pipe outlet, LH pipe outlet and pump inlet pipe) could be tightened so I carefully tightened all 3.
I then reassembled everything and started the bike. Sadly the bubbling on the Left hand pipe assembly was worse then before as was the oil leak! So I took it all apart again and removed the left hand pipe assembly to investigate.
After removing the end of the banjo fell off and it was obvious that the banjo bolt had fractured, this was the source of the oil leak and air coming in to form the bubbling.
Fortunately the banjo on the input end that had fractured is just a plain banjo rather than the more expensive and harder to obtain (Suzuki or Kawasaki part) ones at the engine end which have check valves.
I purchased a new banjo from ebay, some 4mm id oil/fuel pipe that was a tight fit on the banjo and the original pipe and some clear adhesive lined heatshrink tube to seal the joint.
I assembled the new banjo, pipe and heatshrink to the end of the oil pipe assembly.
After reassembling and starting the bike, it was apparent that the bubbling and oil leak issue had been successfully cured. Job Done!
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