Very helpful. I have a quick question for you: how do you know if it is the needle, the float, or the pin that is bad? My BMW keeps on dripping a few drops here and there and when it seats at the traffic light in neutral, the RPM keeps going up until I shift gear. Should I replace them all since they are sold as a kit? thank you for your feedback Best Luca
The easiest thing to just replace all 3. If you raise the float to level and no drips, needle is probably good. If it's dripping give the bowl a few taps with a screw driver handle. If the drips stop the needle is sticking. Otherwise you may have a bad needle or heavy floats. I've never seen the pin being the problem. The RPM, I'd first check that when you release the throttle both throttle plates are seating properly and the choke/enricher is closed completely . I suspect your cables are binding/sticking.
You could test if it is the float or the needle by pushing the float up (with the fuel on) and see if it leaks, if it leaks then it is the needle that's bad. I think it would be useful is the fuel bowl would have a mark on it for correct fuel height. Then all you have to do is take the bowl off and check to see if the fuel is up to the line.
Yes very true. The float push up and check for sealing is the first step to identify the needle is bad. I believe the marking issue is the carbs are not level to begin and I always drip/spill fuel when I pull them off :)
@@edwardj456 "I always drip/spill fuel" that would be because of breaking the gasket seal, the second time will be a lot easier to remove and not spill. Two marks would be nice on the front and back, then just line them up with the petrol surface and see if the level is correct. As it is we need to use a pipe on the overflow and check against the side.
Cheers, I intended to take the carb off to do this job but you made it look simple to do it in situation. Good video. 🙂
thanks , very helpful. i am about to do this with my new R80 Dakar i just bought.
Very helpful. I have a quick question for you: how do you know if it is the needle, the float, or the pin that is bad? My BMW keeps on dripping a few drops here and there and when it seats at the traffic light in neutral, the RPM keeps going up until I shift gear. Should I replace them all since they are sold as a kit? thank you for your feedback Best Luca
The easiest thing to just replace all 3. If you raise the float to level and no drips, needle is probably good. If it's dripping give the bowl a few taps with a screw driver handle. If the drips stop the needle is sticking. Otherwise you may have a bad needle or heavy floats. I've never seen the pin being the problem. The RPM, I'd first check that when you release the throttle both throttle plates are seating properly and the choke/enricher is closed completely . I suspect your cables are binding/sticking.
You could test if it is the float or the needle by pushing the float up (with the fuel on) and see if it leaks, if it leaks then it is the needle that's bad. I think it would be useful is the fuel bowl would have a mark on it for correct fuel height. Then all you have to do is take the bowl off and check to see if the fuel is up to the line.
Yes very true. The float push up and check for sealing is the first step to identify the needle is bad. I believe the marking issue is the carbs are not level to begin and I always drip/spill fuel when I pull them off :)
@@edwardj456 "I always drip/spill fuel" that would be because of breaking the gasket seal, the second time will be a lot easier to remove and not spill. Two marks would be nice on the front and back, then just line them up with the petrol surface and see if the level is correct. As it is we need to use a pipe on the overflow and check against the side.