|
Post by Danielle Belle on Mar 14, 2018 7:52:44 GMT -5
Sometimes when riding for a bit my scooter will bog down but only for a few seconds then it'll be fine. It only does once and mostly at night when its cooler out. Any advice why this is happening?
|
|
|
Post by dexameth on Mar 14, 2018 9:01:04 GMT -5
My first reaction is too lean of air/fuel mixture. When it's colder, air becomes more dense and will cause more lean mixture in your motor.
What year, model, and motor size? Any modifications have been done?
|
|
|
Post by Danielle Belle on Mar 14, 2018 9:04:16 GMT -5
It's a 2015 peace sports. 50cc gy6. No mods done.
|
|
|
Post by dexameth on Mar 14, 2018 9:10:53 GMT -5
It's a 2015 peace sports. 50cc gy6. No mods done. I bought the same one as my first scoot. From the factory it had such a small main jet that I would take off from a stop and it would instantly drop RPMs and barely scoot along. I ended up replacing the carb with a 20mm CVK carb pre-jetted and it was amazing. I took off my stock air filter too just for more air flow, but you don't have to if you don't want to. Check this out if you want a true 20mm carburetor.
|
|
|
Post by benji on Mar 14, 2018 9:14:14 GMT -5
It's a 2015 peace sports. 50cc gy6. No mods done. not to be mean, but I thought all stock 4 stroke 49cc motors bogged down cuz of low power haha. If it don't pick up the front wheel and burn blue smoke it ain't running right haha. Seriously tho, maybe a partially clogged muffler. How many miles does it have? I just recently dealt with this on my jog. It would start to run like crap regardless of what I would do to the carb. After about 20 mins of riding it started sputtering real bad and blowing smoke like one of those ex-smokers w a vape pen. Just clouds. About 4-5 minutes of random w.o.t. (wide open throttle) rev ups on the stand it finally cleared out. Mines a 2 stroke tho, I don't know if a 4 stroke can get hot enough by itself to burn the pipe clear if it is clogging up.
|
|
|
Post by benji on Mar 14, 2018 9:16:31 GMT -5
Dexameth could be right. Stock scooters have real small jets sometimes, it's a way to keep em slower and fuel efficient. You may benefit from an up-jet or bigger carb or both. Look in the tech section for carb threads and muffler clearing/burning threads.
|
|
|
Post by GrumpyUnk on Mar 14, 2018 22:51:52 GMT -5
How cold is cold? You can get some real chilling going on if it is cold, as the fuel coming from the float bowl has to take heat from the air(cooling the incoming air) to evaporate and mix. Carburetor icing is possible in some limited atmospheric conditions. I have only experienced it(that I know of) one time. If it is not 'that' cold, you could have a partial blockage of the 'pilot' jet, leaning out the fuel:air mix a bit too much for ready combustion. Have you checked to see how clean your float bowl is? Was the carburetor stored with fuel in the float bowl for any length of time? The passages for fuel are tiny. Tiny.Tiny. A strand of wire from a piece of lamp cord is close to the diameter of some passages at the bottom of the venturi(just 'after' the throttle plate on the engine side). If there is some blockage, running the engine for a while, sitting still, until it will rev without faltering at all might be a good tactic to avoid stumble and stall. I think the idle mix could be richened in that case to help running at temps below full operating temp, and cool atmospheric temp. tom
|
|
|
Post by pinkscoot on Mar 15, 2018 8:55:31 GMT -5
Grumpy, she's in Florida so it doesn't get very cold.
|
|
|
Post by dexameth on Mar 15, 2018 10:27:23 GMT -5
Grumpy, she's in Florida so it doesn't get very cold. Ask the folks that live here! Haha it dips below 70 and people start griping. We've been having a little cold-spell lately; woke up to mid 50's today and everywhere else was in the 30's and 40's (Pinellas county is surrounded by water).
|
|
|
Post by Danielle Belle on Mar 15, 2018 14:54:06 GMT -5
For the last month or so its been getting into the 40's at night. Do y'all think the bogging will stop once the weather warms up?
|
|
|
Post by jackrides on Mar 15, 2018 15:56:23 GMT -5
If bogging only after the engine is warm, one step up on the mainjet should do it. If when engine still cold, enricher is turning off too soon.
|
|
|
Post by jackrides on Mar 15, 2018 16:03:08 GMT -5
If it is the enricher, I added a 10 watt 10 ohm resistor (Radio Shack) in line with either enricher wire and it worked.
|
|
|
Post by GrumpyUnk on Mar 16, 2018 14:35:22 GMT -5
Tampa bay is nice... Couple-three siblings & family in So Tampa and St Pete.
Cold there is when you have to wear long pants.
Need to know when the bogging occurs. Throttle wide open? Engine in lower rpms, accelerating, from idle speed on take off from a stop, or when accelerating while already in motion. The from idle bog can be the accelerator pump lagging, or idle mix too lean. The carb uses idle flow circuits for idle, and a bit of 'mid-range' rpms before shifting more to the other circuits. If too lean, it will show above idle, and a bit more toward the mid-range. Mid range would point more toward the pilot jet, and high rpm, the main jet & slide needle. When does it bog? tom
|
|
|
Post by Danielle Belle on Mar 16, 2018 23:00:53 GMT -5
It'll suddenly just do it for a few seconds after riding for about 20 to 30 min. It'll only happen once then it will be fine. I let the scooter warm up before riding it. It doesn't do it all the time though. It hasn't done it at all today. Just random.
|
|
|
Post by dexameth on Mar 19, 2018 9:56:28 GMT -5
Sounds like when my CDI was dying... might wanna check that too.
|
|