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Running rich
by: 125scooterbro - Jul 15, 2017 11:32:53 GMT -5
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Post by 125scooterbro on Jul 15, 2017 11:32:53 GMT -5
Hello there, what is the main reason or reasons a typical chinese scooter running to rich and how to fix it? Thanks
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Post by pistonguy on Jul 15, 2017 14:45:07 GMT -5
Your Air Filter is Clogged........ Clean It........or
Factory Jetting should be sufficient unless Someone else Changed that?
How bout some more info of what ya got going on.
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Running rich
by: 125scooterbro - Jul 15, 2017 17:28:50 GMT -5
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Post by 125scooterbro on Jul 15, 2017 17:28:50 GMT -5
Your Air Filter is Clogged........ Clean It........or Factory Jetting should be sufficient unless Someone else Changed that? How bout some more info of what ya got going on. issa 125cc qingqi 10-H with 11000km since i buy it in a bad shape i keep working on it, but it still running to rich like the day i bought it and get's hot quick, here is what i do so far, rebuild the carb, new air filter, new fuel hoses/fuel filter, adjust the valves, and double check everything, now someboooooty tell me that it can be the ingnition system? Don't know for sure, i buy this scoot to use it for parts for my other Qingqi 125-10-D wich is pretty same like the H with different design but the engine is same, i want to give it another chance maybe ride it this summer but if i dont fix this i am pretty sure i will melt the piston or even mess up the cylinder. But you made me thinking about the main jet, when i take a look inside it to see day light i have think that the hole is to big like the other jets is see but i dont think about it at the time and just put it back, i will check with my other scooter the jet to see any difference since the carb and engine cc's are the same. Thanks |
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Post by pistonguy on Jul 16, 2017 12:30:16 GMT -5
Did you do anything to the Scooter (tuning/jetting) to think it is Rich?
or What makes you think its Rich?
Another thing to consider is the Intake Charge of Fuel acts as a Coolant When it Enters the Cylinder, Your Not going to Melt Anything Down if it gets Too Much Fuel.
This is a Fixed Jet Carb so not much on all on its own is going to make her go Rich. Running Rich and Hot should Not go hand in hand.
Think of the Bunson Burner in School, On its own the Alcohol flame is Yellow Now Add the Air Hose and you are Leaning its out and the Flame Goes to Blue or White Hot,
Good luck
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Running rich
by: 125scooterbro - Jul 16, 2017 14:30:34 GMT -5
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Post by 125scooterbro on Jul 16, 2017 14:30:34 GMT -5
Did you do anything to the Scooter (tuning/jetting) to think it is Rich? or What makes you think its Rich? Another thing to consider is the Intake Charge of Fuel acts as a Coolant When it Enters the Cylinder, Your Not going to Melt Anything Down if it gets Too Much Fuel. This is a Fixed Jet Carb so not much on all on its own is going to make her go Rich. Running Rich and Hot should Not go hand in hand. Think of the Bunson Burner in School, On its own the Alcohol flame is Yellow Now Add the Air Hose and you are Leaning its out and the Flame Goes to Blue or White Hot, Good luck the spark plug is new and now it's black and greasy, also at around 60kmph i give it full gas..nothing. it hesitate, then boom its almost kick me of the seat speeding like crazy , happens all the time, at first i thought it runs lean but the exhaust smoke is wet and smelly and yeah like i say the engine is hot man believe me i have many of these scooters and this one is just hot. This is the answer on the how i know it runs hot, about if i tune the carb with new jets No. But maybe the old owner did, dont have so much history of this one cause the old owner move from the country and leave it to a woman from wich i buy it, i consider to buy a smaller main jet or a new carb from ebay, and see what will do around next week since i am busy at the moment |
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Running rich
by: 125scooterbro - Jul 25, 2017 12:50:31 GMT -5
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Post by 125scooterbro on Jul 25, 2017 12:50:31 GMT -5
I change the main jet with a smaller one. Still running hot, what can i do to fix it guys?
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Running rich
by: toddmaples - Jul 25, 2017 19:55:37 GMT -5
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Post by toddmaples on Jul 25, 2017 19:55:37 GMT -5
I change the main jet with a smaller one. Still running hot, what can i do to fix it guys? If its hot go larger, not smaller. Rich engines run cooler... |
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Running rich
by: 125scooterbro - Jul 27, 2017 13:45:17 GMT -5
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nssm likes this
Post by 125scooterbro on Jul 27, 2017 13:45:17 GMT -5
I change the main jet with a smaller one. Still running hot, what can i do to fix it guys? If its hot go larger, not smaller. Rich engines run cooler... but as the jets do not seem to make it run more lean and still hot what can i do to make it at least not hot as it is my main problem, the engine gets to hot and just after 10 or 15 minutes on the road it lose power and the engine produce a lot of heat |
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Running rich
by: toddmaples - Jul 28, 2017 16:17:42 GMT -5
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Post by toddmaples on Jul 28, 2017 16:17:42 GMT -5
If its hot go larger, not smaller. Rich engines run cooler... but as the jets do not seem to make it run more lean and still hot what can i do to make it at least not hot as it is my main problem, the engine gets to hot and just after 10 or 15 minutes on the road it lose power and the engine produce a lot of heat You could always switch to a watercooled cylnder, althogh expensive and alot of work. Are all the plastic covers in place? Make sure no broke fins on cooling fan, and all plastic around engine is in place. |
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Running rich
by: 125scooterbro - Jul 30, 2017 3:52:59 GMT -5
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Post by 125scooterbro on Jul 30, 2017 3:52:59 GMT -5
but as the jets do not seem to make it run more lean and still hot what can i do to make it at least not hot as it is my main problem, the engine gets to hot and just after 10 or 15 minutes on the road it lose power and the engine produce a lot of heat You could always switch to a watercooled cylnder, althogh expensive and alot of work. Are all the plastic covers in place? Make sure no broke fins on cooling fan, and all plastic around engine is in place. yes they are, at the moment i give up on the project as i have my other scooter and the time is limited for me, but i will leave it until winter and start work on it then when the time is good for me. Thanks |
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At two clicks off of 80, I need all the help I can get. MC-54-250B
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Post by zipper on Sept 19, 2017 12:34:03 GMT -5
Sorry for butting in but have you checked your oil level? That would SURE make it hot if the level of oil was really low. Also, I did some research on oils which have a lot of zink (ZDDP) in them and found that Valvoline Heavy Duty Cummins Diesel oil has the most in it. ZDDP is the best anti-friction element you can get that protects metal surfaces against friction wear, especially cams and lifters and cylinder walls. Have been using it a long time and have had absolutely no wear on my scooters and BMW R90/6. The EPA made oil companies take it out of oils because of their concern over polution, but, moreover, when cars started using catalitic converters, they suspected ZDDP was stopping them up (?). I use the Cummins Valvoline in all my cars and have had no problems. The Cummins label is on the front of the jug. Also, by what you said about your exhaust being oily, that would indicate the rings or cylinder are worn out. Good luck. the Old Zipper
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Running rich
by: 125scooterbro - Oct 11, 2017 16:36:54 GMT -5
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Post by 125scooterbro on Oct 11, 2017 16:36:54 GMT -5
Sorry for butting in but have you checked your oil level? That would SURE make it hot if the level of oil was really low. Also, I did some research on oils which have a lot of zink (ZDDP) in them and found that Valvoline Heavy Duty Cummins Diesel oil has the most in it. ZDDP is the best anti-friction element you can get that protects metal surfaces against friction wear, especially cams and lifters and cylinder walls. Have been using it a long time and have had absolutely no wear on my scooters and BMW R90/6. The EPA made oil companies take it out of oils because of their concern over polution, but, moreover, when cars started using catalitic converters, they suspected ZDDP was stopping them up (?). I use the Cummins Valvoline in all my cars and have had no problems. The Cummins label is on the front of the jug. Also, by what you said about your exhaust being oily, that would indicate the rings or cylinder are worn out. Good luck. the Old Zipper in the end the engine was beat up, i think the ex owner never change the oil on the poor thing from what i hear, YES they are people like this who own machines and never change oil, i just spare it for parts. Thanks anyway |
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