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Post by snakeplissken on Jul 9, 2017 16:42:14 GMT -5
As per my other threads the problems never end. I had to install a new 70cc kit. I bought a Naraku 70 cc. After install scooter woke up. The problem is it seems to break up part to full throttle. Does installing a performance crank and another 70 cc kit change anything. i have notice it idles much smoother than before. My setup before the changes was a stock air filter with 5 filters in it. I had a piece of duct tape over 2 !/2 of them. ( Don't ask it ran great that way } Stock carb with 85 main jet and stage 6 replca exhaust pipe. I have tried the needle in every position. right now its in the second slot. Best i got it was another airbox without the snorkel. It wanted to launch then broke up. I went to a 90 jet and wasn't any better. I put the other airbox on and it seems somewhat better but still break ups and no top end. Should i get a few more jets and still play with carb or should i get a bigger carb. 19mm or a 21mm.
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Post by 90GTVert on Jul 10, 2017 3:50:17 GMT -5
A new BBK could definitely change the required jetting. I'd start with a selection of jets. Choose 1 airbox and don't switch it around after that unless you want to re-tune. www.49ccscoot.com/faq/carbtune.html |
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Post by benji on Jul 10, 2017 7:02:24 GMT -5
Sounds like air leaks to me. Make sure the airbox and carb are nice and sealed up, then try upjetting or even going richer on the needle and see if it helps. If the symptoms are irratic, then its usually an air leak I've found.
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Post by snakeplissken on Jul 11, 2017 13:29:19 GMT -5
I ordered a new 19 mm replacment carb and a jet kit and airbox. I did a leakdown test and found no leaks. I'm sure its going lean. I surprised going from one bbk to another would change things. Ill know in a few days when i get my parts.
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Post by snakeplissken on Jul 28, 2017 6:42:29 GMT -5
Ok got it running pretty good. I'll say at 90%. I used a 90 jet with 3 uni filters in the stock air filter. The problem im having is when not full throttle it seems go lean. It happens when riding in traffic. It doesn't matter where I have the needle at. Right now I have it in the second spot. It seems to accelerate best on that setting. I was thinks will a pilot jet help out. Are they numbered like main jets. I can't seem to find a pilot jet tune kit like a main jet kit. Do they make one?
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Post by pinkscoot on Jul 28, 2017 8:41:45 GMT -5
What carb did you get and what scoot is this on? The pilot jet only affects the idle so if its idling fine you can leave that as it is. If its running well at idle and full throttle and you have tried all of the needle positions, it may need a needle swap. Just my 2 cents
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Post by snakeplissken on Jul 28, 2017 14:10:29 GMT -5
What carb did you get and what scoot is this on? The pilot jet only affects the idle so if its idling fine you can leave that as it is. If its running well at idle and full throttle and you have tried all of the needle positions, it may need a needle swap. Just my 2 cents The scoother is a Benelli Andretti 50. I'm using the stocked carb. It doesn't idle well after a run. It races then calms down after a minute. Where can I get an upgrade needle.I can't have the bike keep going lean at part throttle. P |
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Post by pinkscoot on Jul 29, 2017 5:33:53 GMT -5
That does sound like its going lean. You need to find out who made your carb. It should have a name on it somewhere. Have you checked that the intake isn't leaking? When its running spray carb cleaner, a propane torch not lit or starter fluid and see if the rpm's change.
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Post by snakeplissken on Aug 5, 2017 13:18:24 GMT -5
To me i think ineed a little bigger carb. I have a 95 jet with the needle in the center. stock airfilter with 5 uni filters in it. It seems to run ok. Full throttle is great. Makes plenty of power. Its just mid throttle and when coming to a stop after a run its seems to idle high til it calms down. Their is no name on the carb. Except for the postion of the mixture screw and idle screw its an exact copy of this. www.partsforscooters.com/Carburetor_50cc-2?sc=31&category=133066 |
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Post by pinkscoot on Aug 6, 2017 10:22:10 GMT -5
Its just mid throttle and when coming to a stop after a run its seems to idle high til it calms down. That is a sure sign of running lean. My Hyosung does the same thing and I spent too much time chasing that gremlin. |
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Post by snakeplissken on Aug 17, 2017 10:06:46 GMT -5
Ok the work in progress is moving along. I up the jet to 100 cause on a extended run at wot it bucked twice. The problem at idle and mid still bad. I finally took off the stock air cleaner with 5 uni filters in it and put a performance air filter on it. solved the break up at idle and mid but after a run to work about 2 miles of a run. it started to break up wot and then cut off. wouldn't start for 5 min. I guess its getting a little too much air at wot? right now i wraped some duck tape around the 1/4 of the filter. I'll see how that goes. I will also up the jet to 110. With the box with the uni filters in it didn't have a problem with wot. will have to say once i put the performance filter on it took off like a bat out of hell and went the fasted i ever seen it go. will no more in a couple of days
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Post by snakeplissken on Aug 22, 2017 14:09:29 GMT -5
Just to update the scooter runs great. Idle runs on a little when coming to a stop but not outrageous. Most likely need a slightly bigger pilot jet but can live with problem. Hit and miss with running with electric choke but again not a really big problem since you don't need to warm up a two stroke. After installing the 105 jet the scooter is scary fast.I'm just estimating at 70mph but haven't really measured it. the tranny seems good with 5.5 rollers and yellow springs in the back. When i get a chance i'll play around a little more with that tio dial it in a little better. For now I'll just ride and evaluate what it needs for next season.
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Post by snakeplissken on Aug 28, 2017 14:54:05 GMT -5
Disaster happen. the temperature dipped in the morning. about 60 degrees. while the scooter was fine wot when warm with the 105 jet it wasn't enough to save it when cool out. it burned out lean. I felt something wrong and let go of the throttle but it wasn't enough. funny thing is it didn't seize. I guess it need the next size jet. maybe 2 sizes. Ordered another kit and will be running again in a few days.
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Post by snakeplissken on Sept 15, 2017 17:42:11 GMT -5
Ok got screwed by racing plantet. Part was supposed to be in USA but wasn't. Only bought from them had a 20 off dicount. Anyway finally got the new head kit. Indtaller it and up jetted to 110 jet. Fired up good and adjusted the carb. TooK it for a ride and took it easy to full throttle. Running fine then when I let off throttle it shut down. It cranked right away but didn't start for a few minutes. It must of soft seized by going lean after letting off throttle. Can't be oil related since I'm running premix. How can I solve this. Don't want to destroy another kit. Any ideas?
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