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#1 |
Join Date: Aug 2024
Posts: 5
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Need help tuning up moped scooter
I have a X-PRO Fiji 200 EFI Electronic Fuel Injection Scooter with 3k miles on it now. I have kept up on changing the oil every 300-500 miles, keep air cleaner cleaned, only use good mid grade gas (89). But lately it has started to run rough.
When I start it, it needs a few mins to warm up or it will stall when coming to a stop. when I let it idle I can smell a strong exhaust smell, like carbon, which I never smelt before\When it does stall it is hard to get started again, I have to hit the starter button and then give it a little gas to get going, only for it to stall again. I noticed when I hit the kill switch and wait a few seconds, it will start like it should, but will still stall from time to time. I don't know if it needs a tune up, which I have no idea how to do, or maybe the computer is faulty or maybe a sensor? If anyone has an idea what it might be or where I should look, before I start replacing parts. Any help would be great thanks! Last edited by lovs2build; Yesterday at 01:53 PM. Reason: adding info |
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#2 |
Join Date: Sep 2014
Posts: 1,910
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No check engine light? I'd check the spark plug for color and the plug cap to see that it's screwed on to the wire properly. I'd also check all the connectors for good contact on the pins, and check that the engine temperature sensor wire is in good shape.
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#3 | |
Join Date: Aug 2024
Posts: 5
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Quote:
Thanks for the reply! No check engine light, I did replace the spark plug when this started, I thought that might have been it. "check that the engine temperature sensor wire is in good shape" where might I find that. I'm old school, not sure on these electroic stuff on bikes and cars. Also do you know of somewhere I might be able to find more info, on how to service or tune this bike. It's so hard to find parts. I was able to find a muffler exhaust gasket on ebay so I know the type of engine it is, but beyond that I don't have a clue. Thanks again! |
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#5 |
Join Date: Aug 2024
Posts: 5
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This is intermittent, I don't think it is my value clearance, why I thought it was a sensor or the computer, because resetting with the kill engine switch, seems to fix it, sometimes.
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#6 | |
Join Date: Sep 2021
Location: De Soto, MO
Posts: 1,922
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Quote:
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#7 | |
Join Date: Aug 2024
Posts: 5
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Quote:
I just need to figure out how, as I can't find a service manual and I'm an IT not a mechanic. I did search and I checked my manual that came with it and it shows to adjust values at intervals which I am over due. |
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#8 |
Join Date: Jun 2024
Posts: 51
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Not familiar with this scooter at all but on one EFI bike I owned a bad temperature sensor caused similar symptoms. The ECU received a low temp reading which made it run rich and was a intermittent problem.
Similar to your scooter, when I used the kill switch to cut it off it started back fine (due to it operating correctly at the time). When it stalled, it was hard to start back up (stalled due to rich mixture). Kind of like killing a standard carb bike with the choke, it's going to be hard to start back up. |
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#9 | |
Join Date: Aug 2024
Posts: 5
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Quote:
This is EXACTLY what I am experiencing, the smell when I start it in the morning is because it is running rich I am sure. I don't know where that sensor is, as I can't find a service manual on it. I will contact a service center that works on bikes. It's all I can do as I don't think I could adjust valves or find this sensor. There is a sensor in my exhaust pipe that has what looks like a bad wire, but it is attached to the sensor correctly, I wonder if that is the engine heat sensor? |
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#10 |
Join Date: Jun 2024
Posts: 51
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The sensor in the exhaust is probably an O2 sensor. The engine temp sensor, if it's an air cooled engine, is probably around the cylinder head somewhere; usually near the intake port.
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#11 |
Join Date: Nov 2019
Location: KY
Posts: 274
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It appears that the one thing you are not doing is getting on Youtube and learning to do the simple maintenance these scooters absolutely require. Pull up a video and adjust your valves. Valves expand and contract while operating, that is why they need good clearance adjustment.
Second thing is to check your fuel pump. You have a cheap chinese fuel pump that is probably giving you erratic or low fuel pressure and causing the "erratic" behavior. If there is any problem with bad fuel or dirty injector the fuel pump has to make enough pressure to blow the gas past the obstruction. That is why EFI can not be a simple gravity feed. You might also want to shine a flashlight into that tank and see if there is any water in your tank. It does not have to come with the gas quality, it sometimes happens due to overnight condensation.
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%90 of the Chinese motorbikes ever made are still on the road. The other %10 made it back home. |
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