A failed oil pump on my other bike has just cost me £350 in repairs incuding new main bearings a crank rebuild and a new piston and seals and gaskets so i will be running pre mix from now on. Do i just disconnect the cable that goes to the oil pump and then run the pre mix or does the oil pump have to come out. I have been told to run 150ml 2 stroke to 5 litres of petrol for running in a rebuilt bottom and top end and 130ml to 5 litres of petrol for normal running by the guy that rebuilt it.
Oh dear, bit rough that ey? tell ya more trouble than they're bloody worth those oil pumps Right then disconnect the cable from the pump, tape/cable tie it up on the frame somewhere or disconnect from the 2-1 junction box, chop the two pipes that are on the oil pump, about an inch from the spigot, then bang two self tappers into the stubs. same with the rubber manifold on the reedblock, Pre-mix seems a tad heavy that that does at 150ml to 5 litres, works out to about 33-1 ratio, I'd probably go with that for running it in, but normal running using good 2t oil I use 40:1 ratio, that works out at 125ml per 5 litres of petrol, I put up somewhere on here a link to a program called Ratio Buddy, download that to your desktop.
The oil pump set up on the husky is identical to the dtr so should be simple enough to do the guy that repaired it also said change the piston every 70hrs
Quick question, does premix work for people who will be using the bike daily? Like, I don't wanna get caught short but don't like the idea of my oil pump dying when I get round to putting the rebuilt engine in my bike. Seems like it might be hassle mind having to premix all my fuel and oil..
Epic fail by your oil pump there though, I'd be tempted to check over the pump every couple of weeks or months and change the pipes to car ones so to can see its pumping oil, if I wa to put a pump back on. Unless you are a fan of carrying around 2 stroke in a bag
Quick question, does premix work for people who will be using the bike daily? Like, I don't wanna get caught short but don't like the idea of my oil pump dying when I get round to putting the rebuilt engine in my bike. Seems like it might be hassle mind having to premix all my fuel and oil..
Epic fail by your oil pump there though, I'd be tempted to check over the pump every couple of weeks or months and change the pipes to car ones so to can see its pumping oil, if I wa to put a pump back on. Unless you are a fan of carrying around 2 stroke in a bag
It was worse than i thought i fitted the rebuilt engine yesterday connected everthing up put in oil and coolant i was just about to start it but thought i would clean the air filter first when i got to it the back of it was completly dissolved as was a peice of the air filter cage and the air box was full of little bits of air filter i found the battery had been leaking on to the air filter so the poor engine had been running very very lean, was sucking in bits of air filter and a melted pipe on the oil pump had been starving it of 2 stroke i,m gobsmacked that the bike was still running it sounded rough but it was still running
Ive ordered a pre oiled filter and a sealed battery so hopefully it should not happen again. I normally use silkolene air filter oil my filters i may use 2 stroke next time does it make much difference use 2t.
I just filled it up with premix and she fired up on the 3rd kick a bit smokey but thats fine once its run in i will start using 125ml to 5 litres of petrol instead of 150ml to 5 litres. I must say it definatly given me peace of mind knowing that its always going to have 2 stroke in there and hopefully prevent another engine failure and cost me £££s.
It sounds very nice too it has a husky racing pipe and new dep silencer and ive done 3 heat cycles on the engine and i am taking it out tomorrow for a gentle half an hour ride. The dtr is getting a tidy up next as it looking a bit ruff the plastics are getting faded and some of the stickers are peeling off.
It would not be running rich on oil coz it would be burning it off coz of th oil replacing the fuel would make it run lean fuel- air and it will die ,if u r running premix u gotta up the main jet to the same ratio or the engine is gettin the same amount of air and oil in the premix but a lesser amount of fuel ????? If u want to give the engine th oil throoo th same hole (carb jets ) u must check your plug after running a well mixed /measured fuel ......to determin if it's running good BUT it will not turn freely until its run-in ...and if it's a full rebuild u need to change th tranny oil in about 400 miles .... I could go on and on but if u need any help buddy just post up here and when isee it I'll help out dude
Agree with above, although I don't know why you would want to run premix aswell as the yamaha autolube system? The idea of the autolube system is that you dont have to run premix.
Better off setting the oil pump to run more oil. Then your just gaining oil. Use the Haynes manual though and follow the advice in there. Tried and tested methods.
Had a rebore and I'm running her in purely by pre mix but I've read somewhere with the oil pump, lines and bottle still connected when doing this it will suck in air through these lines, is this true??
I'm not wanting to remove the OIL pump as once its fully ran in Ill be using it again and I dont want to block off pipes and that if its not necessary??
What do you think, would AIR be sucking through if the oil system is dry but all lines and bottle connected up??
or even would some of OIL be leaving the carb and just sitting in the delivery pipe to the reed block or not??
You will have to block off where the oil is fed into the manifold. You will have to find a way to disengage the pump or you will get two stroke everywhere. You could drain the oil but the pump will spin with just air, no reason you could bleed the air out when you go back to the pump.
Literally got to set thr oil pump to be activated when the throttle is closed. Else you'll have a nasty surprise when you come to shut the throttle when going down hill or slowing normally from high speeds. Ie a dual carrige way.
