David carter Posted January 21, 2018 Report Share Posted January 21, 2018 Hi I have brought a tiger cub trials bike as a project I have had it running before I stripe the bike for a frame rebuild. The engine has been in a frame on my bench on refitting it back in the frame I can not get oil too return from the engine when it is running I am sure I have fitted the oil feed pipes correctly any adivce Quote Link to comment Share on other sites More sharing options...
naichuff Posted January 21, 2018 Report Share Posted January 21, 2018 Hi If you look under the engine at the oil feed/ return pipes The return is the one nearer the front Then follow the pipes back If the engine has been drained of oil it can take some time for oil to return On my cub I use a clear pipe on the return to see it is working The oil level should have dropped when you started it up Quote Link to comment Share on other sites More sharing options...
David carter Posted January 21, 2018 Author Report Share Posted January 21, 2018 Thanks it seen a worrying when running the bike there is no oil coming back from the return I was also told try putting half of cup of orange l back down the rocker cover and let it drain down to the oil pump so it primes the return side of the oil pump not tryed this as yet Quote Link to comment Share on other sites More sharing options...
moleman Posted January 21, 2018 Report Share Posted January 21, 2018 Bottom left of crankcase is the pump filter /pick up Remove this and check for obstructions ( gasket sealant ...) In pickup pipe If you are lucky there will be something blocking it. Use a torch Because it has been on the bench on it side something may have moved that sits comfortably in normal use If nothing visable put bolt back in and try something else. Still no joy , you will have to take pump off and filter bolt out again and blow through from pump side Or , whilst taking off the pump one of the anti syphoning balls against the crankcase may be stuck For what it's worth , I remove those ( leave the two in the pump !) I havent had any bother wetsumping and it's one less thing to block Quote Link to comment Share on other sites More sharing options...
b40rt Posted January 22, 2018 Report Share Posted January 22, 2018 17 hours ago, David carter said: Thanks it seen a worrying when running the bike there is no oil coming back from the return I was also told try putting half of cup of orange l back down the rocker cover and let it drain down to the oil pump so it primes the return side of the oil pump not tryed this as yet Not quite the same, but the oil down the rocker cover defiantly works on a b40. Might also be worth removing oil pipe from tank and checking its flowing before attaching to pump. Quote Link to comment Share on other sites More sharing options...
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