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I´m after some technical advice...I have a K100 RT 85\´model that will not start. All checks point to fuel starvation. I have checked and cleaned the injectors, fuel pump & filter, pressure regulator with no luck. I\´ve even blocked the return hose for more pressure.
My question is how much pressure does the fuel pump need to pump out to achieve a decent size spray of fuel from the injectors?
Any response relating to the above query will be highly appreciated.
I have a 1985 k100rt and it would not start. i made some calls to bobs bmw in maryland and i unplugged electrical connector on gas tank ,sprayed it with electrical contact cleaner and coated it with dielectric gel. that fixed it. also check main grounding point on frame under gas tank.on a bike this old you need to make sure electrical connections are clean. the fuel pump is supposed to deliver fuel at 36 psi according to clymers repair manual. i hope this helped .
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Hi and welcome to FixYa. I am Kelly. Fuel starvation is cause by debris in the bottom of the float bowl most of the time. Removed the bowl nut and bowl. Take some carb cleaner and shoot into the hole that the bowl nut screws into. Also clean out the holes on the side of the bowl nut. The fixes about 85% of all fuel starvation problems.
Debris in the fuel tank exit port, a dirty fuel filter, or a clogged float needle seat area can also cause the problem. I think if you follow the instructions above you should be back in business. If not pass the exact model number of your engine and I will help you by providing diagrams and how to steps at that point. The engine number is located just behind the oil fill hole on the bottom side panel of the crank case base.
the k100 has no choke fitted to it,,,there is a leaver that lifts the inlet butterflys but no choke as you call it,,its all fule injected,,,
when the engine is cold the engine temp censor tells the fule computer to inritch the fule mix so the engine will start up easy
therefor you need to run the engine till its warm before the temp censor turns off the extra fule however have a look on this web sight,,,www.maxbmwmotorcycles.com....this will help you out
probably find that the dog clutch on the end of the starter has given up the ghost,failing that,bmws are critical on the grade of oil used and if you have used a mineral rather than synthetic oil the dog clutch will be gummed up with deposits,sometimes a hot engine flush and new oil(synthetic)will fix it,hope this helps
i have a 1985 k100rt and it would not start. i made some calls to bobs bmw in maryland and i unplugged electrical connector on gas tank ,sprayed it with electrical contact cleaner and coated it with dielectric gel. that fixed it. also check main grounding point on frame under gas tank.on a bike this old you need to make sure electrical connections are clean. the fuel pump is supposed to deliver fuel at 36 psi according to clymers repair manual. i hope this helped .
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