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Post by sumo210 on Jan 19, 2016 10:26:50 GMT -5
So i have gotten my scoot started but its not idling at all i have to constant rev it to keep it on.. not sure what it might be. The stock intake it busted bad so it no good and right now i dont have a a pod filter but i just wanted to get it started.. the carb is not tuned or adjusted i just put it on the way I bought it. Can you please help because I really want to fix it so i can get it going because Im so excited get rolling on it.
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Post by cwazywazy on Jan 19, 2016 11:49:09 GMT -5
If you don't have the stock air box restricting airflow it could be running too lean to idle. Upjet or at least try adjusting the AFR screw.
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Post by sumo210 on Jan 19, 2016 12:02:07 GMT -5
which one is the AFR screw?? is the one near the manifold right?? also so if its too lean thats mean to much air right??
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Post by sublunacy on Jan 19, 2016 13:07:13 GMT -5
your going to get a rude awakening.
purchase a jet kit and needle kit and filter before you do anything.
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Post by cwazywazy on Jan 19, 2016 14:22:52 GMT -5
Yeah, get a filter and a larger pilot jet. Easiest thing to do would be to replace the stock airbox and filter so you shouldn't have to mess around with jets and mixtures.
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Post by sumo210 on Jan 19, 2016 15:17:25 GMT -5
well i went home no my lunch break and got it to start and stay idling by messing a bit with the AFR screw and the throttle screw.. so now it stays on but it will only turn on with the kickstart and not the push button.. i noticed that there is a bigger spark when i kick and when i press the button its very small comparably. I already changed the CDI, Spark plug with a NGK iridium, and carb. so i havent changed the ignition wire could that be it to??also thanks i will be getting a filter and a jet kit.. i dont think i need a new needle since its a "20mm " carb from o2starrider on ebay so its adjustable. or am i wrong?
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Post by cwazywazy on Jan 19, 2016 15:20:35 GMT -5
well i went home no my lunch break and got it to start and stay idling by messing a bit with the AFR screw and the throttle screw.. so now it stays on but it will only turn on with the kickstart and not the push button.. i noticed that there is a bigger spark when i kick and when i press the button its very small comparably. I already changed the CDI, Spark plug with a NGK iridium, and carb. so i havent changed the ignition wire could that be it to??also thanks i will be getting a filter and a jet kit.. i dont think i need a new needle since its a "20mm " carb from o2starrider on ebay so its adjustable. or am i wrong? Kicking it usually turns the engine faster so that might be why you see the stronger spark. Also if it doesn't start you may have just drained the battery. If the needle has notches it is adjustable by moving the clip thingy. It mostly affects mid range. Getting a filter and then jetting would be best, but replacing the stock filter and airbox so the intake restriction is the same as it was stock shouldn't require any messing with the jets. If you feel comfortable jetting it then go ahead with the pod filter or whatever. |
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Post by sumo210 on Jan 19, 2016 15:38:54 GMT -5
i do ive worked on carbs for cars and i know it will take a long while to rejet it but i have time. since it wont be my main way of travel until i can get it running perfectly..well at least aas perfect as i can get it. also does any auto parts store sell the pod filter and the jet kits locally or would i have to order them online?? i really dont want to wait long
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Post by sublunacy on Jan 19, 2016 19:02:02 GMT -5
the main jet and needle diameter and filter restriction tunes the carb at ALL rpms at wot.
the needle height tunes the exhaust.
the cvt tunes the needle angle.
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Post by niz76 on Jan 19, 2016 19:36:16 GMT -5
the main jet and needle diameter and filter restriction tunes the carb at ALL rpms at wot. the needle height tunes the exhaust. the cvt tunes the needle angle. Ok, this is the second time I've seen this response for carb tuning. It may just be me- but I can't make heads or tails of it. Can you elaborate?? "the needle height tunes the exhaust"?? and "the cvt tunes the needle angle"  I'm sorry but I just don't get it! |
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Post by cwazywazy on Jan 19, 2016 19:56:53 GMT -5
the main jet and needle diameter and filter restriction tunes the carb at ALL rpms at wot. the needle height tunes the exhaust. the cvt tunes the needle angle. Tell me more, doctor. |
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Post by sublunacy on Jan 19, 2016 20:01:51 GMT -5
i will include carb tuning basics on my hpc crank thread. its not me thats confused. carbs are tuned by vacuum signal. unless you see the tuning guides starting with that tidbit of information they are just under complicated parts diagrams.
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Post by sublunacy on Jan 19, 2016 20:36:33 GMT -5
the variator weights can be tuned so the engine seems bogged down or free revving - this tunes the needle angle.
the needle taper height tunes the powerband at PART THROTTLE.
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the mainjet and wot needle diameter and filter restriction all work together to tune wot at any rpm.
did that help? im not trying to make it short and sweet. there are specific results and is explained in 3 sentences only. not many people get factory level reults? i do!
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the needle tip diameter at wot is the hardest to pinpoint. try going wot from 2000 rpm to 8000 rpm and you will notice specific results that are different than part throttle acceleration. if that happens the vacuum signal is incorrect. it should run best at wot. part throttle should be a touch leaner so it cruises better.
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Post by Fox on Jan 19, 2016 23:01:12 GMT -5
Well the thing that stood out to me in the original post was that he said his stock intake is "busted bad" which means that he has a massive vacuum leak that no amount of jets or carb tuning is going to overcome.
My advice is: Park the scooter, buy a new intake.
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Post by sumo210 on Jan 20, 2016 12:04:53 GMT -5
Actually guys i got it running even with all the intake taken off i was actually running it around for a bit to see how it was and it was doing about 30 or so and thats just about what i expected since i am about 350+ on a lil 50cc but for some reason it worked and yes im picking up a parts bike tonight to get all the broken pieces and salvagin anything i need i/e the intake and some body plastics.. so hopefully i will have it running better soon.. right now it is just having a issue starting with the push to start but kickstarter turn on with a small kick... wierd though because push to start button work just seem like it oesnt make enough spark to turn it on.. i think it may be the ignition coil since it the only piece i havent changed out yet.
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I'm sorry but I just don't get it!
