CockneyRick Posted June 5, 2022 Share Posted June 5, 2022 Was having trouble getting the Efe to start and eventually found the inline filter was strangling it. However in my efforts to find said issue, i used clear hose from the tap. Once i removed filter, the flow was still poor. On Prime/On/Res i got nothing, (I know 2 of 3 positions are nothing with vac taps) engine running the Res/On was enough to pull a small stream through, but not enough to fill the 8mm bore hose up. Time for a rebuild kit do you think, or a whole new tap? Quote Link to comment
TonyGee Posted June 5, 2022 Share Posted June 5, 2022 on PRI the fuel should flow free and full, maybe a blockage ? time for a strip though. 1 Quote Link to comment
slayer61 Posted June 6, 2022 Share Posted June 6, 2022 Yup. Pull the tap & inspect/clean the screen. Might just be some schmutz covering it up. Quote Link to comment
CockneyRick Posted June 8, 2022 Author Share Posted June 8, 2022 Having taken tap off, stripped & U/S cleaned, then rebuilt with a new kit it has to be said it's only marginally better. Fuel flows down pipe fine on prime, but engine pops & bangs with fuel starvation on the other positions. This is all before i even get it off ramp & under load! Having done the above, could it be the vac hose/carbs are not pulling the vac open enough? Quote Link to comment
TonyGee Posted June 8, 2022 Share Posted June 8, 2022 (edited) put the vac pipe on the tap and suck it when its on ON and RES. it should flow nice and free. if it doesn't then the problem is still with the tap. check vent in tank and have you got plenty of fuel in it Edited June 8, 2022 by TonyGee Quote Link to comment
CockneyRick Posted June 8, 2022 Author Share Posted June 8, 2022 Admittedly i have replaced the cap this time, & fuel has enough for Res anyway. I'll play a bit more tomorrow. Quote Link to comment
Michaelheyes Posted June 21, 2022 Share Posted June 21, 2022 I’m having problems with fuel coming out of a breather pipe on the right side carb. No matter what position the fuel tap is in it keep flowing with engine off or on.. is this a new fuel tap required ?1978 GS1000 Quote Link to comment
CockneyRick Posted June 22, 2022 Author Share Posted June 22, 2022 8 hours ago, Michaelheyes said: I’m having problems with fuel coming out of a breather pipe on the right side carb. No matter what position the fuel tap is in it keep flowing with engine off or on.. is this a new fuel tap required ?1978 GS1000 Easy one that, float has stuck open. Just tap bowls with small mallet or screwdriver head to hopefully free it. If not, carbs off & strip down the bowls Quote Link to comment
CockneyRick Posted June 22, 2022 Author Share Posted June 22, 2022 As for mine, totally failed tap, swapped with a spare & all is good now Quote Link to comment
Michaelheyes Posted June 28, 2022 Share Posted June 28, 2022 On 6/22/2022 at 8:58 AM, CockneyRick said: Easy one that, float has stuck open. Just tap bowls with small mallet or screwdriver head to hopefully free it. If not, carbs off & strip down the bowls If been told to change the float bowl valve and hopefully that will sort it! it’s never had a vacuum pipe fitted to the fuel tap, would this be a problem? And if so we’re does it pick the vac up from to connect to tap? Quote Link to comment
TonyGee Posted June 28, 2022 Share Posted June 28, 2022 7 minutes ago, Michaelheyes said: it’s never had a vacuum pipe fitted to the fuel tap, would this be a problem? sounds odd ???? it should be a vacuum tap unless someone has fucked around with it !!! can you post a pic ? Quote Link to comment
Michaelheyes Posted June 28, 2022 Share Posted June 28, 2022 20 minutes ago, TonyGee said: sounds odd ???? it should be a vacuum tap unless someone has fucked around with it !!! can you post a pic ? It has the tap but nothing connected Quote Link to comment
Swiss Toni Posted June 29, 2022 Share Posted June 29, 2022 Fuel flow is activated by engine vacuum. Tap to inlet tract. So, if the vacuum pipe’s not connected, how is the fuel flowing? Quote Link to comment
george 1100 Posted June 29, 2022 Share Posted June 29, 2022 (edited) I'm not sure of the exact fuel tap you have there but I believe the vacuum operated Suzuki ones use the same principal. If the taps are repeatedly turned to prime and back, the inbuilt ramp that pushes the needle to allow fuel to flow, wears out. It's only soft cast alloy and it's actually difficult to even notice it's worn. Happened to me and I almost went insane before I figured it out. The correct way to turn the gsxr taps onto prime is to push and turn at the same time. This may apply to yours also Try turning it to prime then pushing it in to see if it flows Edited June 29, 2022 by george 1100 Quote Link to comment
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