Moped Loses Power At Full ThrottleI also put a new spark plug in it. Scooter losing power upon acceleration Luke Samp / luke_samp Mar 26, 2022 10:20PM Would anyone happen to know why my scooter loses power when I accelerate and jolts and even doesn’t accelerate with full throttle? I’ve got some understanding it might be the carb but it’s only started happening since I went fast over a speed bump. Vacuum leak on the carburetor or intake boot. I have a kymco sento 50 and all of a sudden it has started to lose all power when cruising. If you need further assistance with your scooter having a loss of power at full throttle, then seek out a professional, such as one from Your Mechanic, to help you. Hello, I have a Buddy 50cc 2 stroke moped, recently when i accelerate at full throttle, or just at any point try to go full throttle, the moped starts losing power and until i come to a full stop and engine is idling, it will continue to act as if it does not have power. What causes a 2 cycle engine to bog down? Another common cause of bogging down can be the fuel tank cap. If the motor still runs at full throttle after disconnecting the throttle then the problem is in the speed controller and it will need to be replaced. When giving the scooter half throttle it kinda stutters but when I go full throttle it’s completely fine r/scooters • this is my znen 50cc Chinese scooter. I have a Kymco super 9, air cooled 2 stroke. On a moped with high mileage, the belt will cause slow top end speed if worn thin. Scooter runs now, and I can take it to full. A bad crimp or solder joint on the load terminals can also cause low voltage, feel for heat at the connection after shutdown or skin the insulation off the wire after connection temporarily to get the aligator clip on the feed wires to the controller. even changed the transmission oil, took out old oil and put in 10w 30. Here's the background: • Kaitong 150cc. There are different reasons why an engine bogs out under acceleration: The most common reason is that your air/fuel mixture is inefficient or dirty. Kymco 50 random power loss I have a kymco sento 50 and all of a sudden it has started to lose all power when cruising. Even when not a full throttle if I cruise for more than 15 seconds or so it loses all power and won't go again until the scooter has dropped back down to under 5km/h. Once i stop, or turn the moped off and on, its back to normal. The problem could be in the throttle or speed controller. Typically a lean condition caused by an air leak between the butterfly and the head or a vacuum line that is not attached. Several factors can cause moped problems with accelerating. It began happening about a quarter of the way into a new tank of fuel. It is possible that the inlet filter is restricting the air flow. There are six main reasons why a motorcycle loses power when accelerating which are: Plugged jet in the carburetor. ok i was riding my scooter one day. Even when not a full throttle if I cruise for more than 15 seconds or so it loses all power and won't go again until the scooter has dropped back down to under 5km/h. Probably better with scoots that are used a lot through rain & shine as there is a good through put of the vital fuel so less time for rust to form as the new fuel gets added etc. Most of the problems with the scoots is with the carbs and or leaking hoses due to not being on tight as well as the intake and clamp on the intake holding the carb. Took the scooter for a ride (6410 miles on it) and it seemed to bog down at 1/2 throttle on up. Things that will make the engine sound or run different- Plugging air intake- will start well cold, but be hard to warm up and not reach top speed. Take one of the wires out, inspect it and put it back carefully before you remove the next one. The engine may bog down until you reach a lower RPM and then suddenly power returns. Why does my moped keep losing power? There are basically three issues that can cause this problem; bad fuel, clogged fuel filters, or carburetor / fuel injector. Engine will stutter at high RPM. Let off the throttle and open the throttle again. The engine seems to go to idle, and the throttle doesn't do anything and no power goes to the wheels. New to the forum. See full list on motorcyclehabit. Low compression in the engine can cause a lack of power and difficulty accelerating. Your scooter has a fuel flow restriction which could either be in the tank, lines, or carburetor itself. Maybe it doesn't work on your bike, but it did here:) Bike is. A worn-out spark plug can also affect fuel efficiency and cause engine damage if not replaced promptly. Kymco 50 random power loss. Would anyone happen to know why my scooter loses power when I accelerate and jolts and even doesn’t accelerate with full throttle? I’ve got some. I recommend removing the carburetor and cleaning it and replacing the fuel filter. No power at full throttlefigured out! I have been working on this 58 VNA for a few months now and I am having a fuel issue (I think). Here are 4 ways to find the answers you need: Scan the questions/answers on this page. It could be bogging down the engine. Engine loses power after 5mins at full throttle. Try running it without the filter. i found a crack in the rubber manifold so i changed that but still ran like it had no pick up. To test whether this is the problem, disconnect the throttle from the speed controller. I recommend the following: 1) Change the spark plug first off! 2) Clean the carb jets, including the accelerator pump with carb cleaner. When I open the throttle just a tiny bit it starts shaking(idk if this is normal or not) and seems to rev very high after a while but from about 1/2 throttle it loses all it's power and the engine dies when I open the throttle fully (sometimes it even dies when the throttle is only halfway open). The common causes of 2 stroke bogging at full throttle include using the wrong gas mix, dirty or clogged air filters, damaged spark plugs or barrel gaskets, and damaged intake manifold gaskets. There are different reasons why an engine bogs out under acceleration: The most common reason is that your air/fuel mixture is inefficient or dirty. Consider cleaning the air filter or replacing it. ok i was riding my scooter one day. In other cases, a faulty spark plug is the cause, the lack of a proper spark will inhibit power on a moped or motor scooter resulting in sapped acceleration. Wide open throttle yields no power. If the scooter fixes its self, then the float bowl in the carburetor could have debris in it causing a restriction. Problably sand got into main jet in carburetor and bike lost power on full throtle. Cause #1: Fuel Intake Adjustment (Carb) Cause #2: Spark Plug Issue (Carb) Cause #3: Blocked Fuel Jets (Carb) Cause #4: Incorrect Float Height (Carb) Other possible issues: (Carb) Other cause #5: Too High or Too Low Oil Level (Injector or Carb) Other cause #7: Dirty Air Filter (Injector or Carb) Other Cause #8: Vacuum Leak on the Carb. Why does my moped keep losing power? There are basically three issues that can cause this problem; bad fuel, clogged fuel filters, or carburetor / fuel injector issues. Moped loses power sporadically while pulling throttle I have a 2012 bravo breeze. There are several common problems that can cause mopeds to lose power at full throttle including an old spark plug, a dirty air filter, a clogged fuel line or filter, improper fuel mixture settings, faulty wiring connections, or worn out engine components such as valves or pistons etc. If it can be backed off and. Engine does not stop at all it just stops the throttle and. 04/16/10 12:39AM Re: Puch loses power at full throttle Re: Jimbo Grand Daddy: Jimbo Grand Daddy 04/16/10 02:50AM Re: Puch loses power at full throttle Re: Pushrod Fifty: Pushrod Fifty 04/16/10 08:59AM Re: Puch loses power at full throttle Re: Eathan M. Maybe it doesn't work on your bike, but it did here:) Bike is KTM. it moves through the three as the throttle position increases. I have a brand new 66cc motor kit that mounts onto a bicycle frame is known as an 80cc Skyhawk but in Canada it's 66cc. Hello, I have a Buddy 50cc 2 stroke moped, recently when i accelerate at full throttle, or just at any point try to go full throttle, the moped starts losing power and until i come to a full stop and engine is idling, it will continue to act as if it does not have power. A squirt of starter fluid at the boot while running will tell you. When you are going full throttle, the engine should get to a high RPM and sound smooth. Check to make sure you don’t have a leak on the intake manifold or the manifold side of the carb’. Search our question/answer database: Ask your unique question using the form below. The battery pack might need replacing or it can't be recharged properly. When I try to speed up I gotta give the throttle some love and rev it a bit because it starts to. usually that happens after engine is shutoff, but in hot weather driving the moped around I notice fuel lines get real hot as they are routed near engine head.