groundloosers
Scoot Member
Learn from your mistakes, live life and have fun.
Posts: 59
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Post by groundloosers on Sept 20, 2019 20:42:29 GMT -5
i can atleast view the image but its still tiny. did you upload a thumbnail of a photo by any chance? they are usually much smaller than the actual picture is. or possibly that site resized the image? i see alot of resizing options for the upload image thing and the avatar and thumbnail setting looks to be about the size the image came out to. i tried to download the image so i could atleast zoom in but it says its 113x150 pixels. my pictures are 4128x3096 pixels for example. im not trying to be rude or anything just trying to view so i can help you. if you resized to upload the image to the forum page dont. just go full size and drop the link on the page nobody will mind that way and its easier on the forum servers and easier on our eyes. drive.google.com/drive/folders/1J92O1CIkcq6zmQ7Nvp1FU9N6HSQKMHJ6?usp=sharingthats what it looks like on my end and i use a very large monitor so it makes it harder to see as the picture is about the size of my thumb on screen drive.google.com/file/d/1F8RyNHEtMEnHvUICJQKOniNfs2Uacokp/view?usp=sharingi use google drive as its free and doesnt do anything weird to images i upload so they come out good like that. it makes it easier on the rest of us. |
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Post by chehystpewpur on Sept 20, 2019 21:22:59 GMT -5
i would try to dial whichever carb in that you can but i showed you that i cant see the images because they are tiny. the more i zoom the blurrier it gets but if your plug is white it is deff way too lean and you can burn a hole in your piston that way. what ever carb is going to be easier to get to a nice brown color is going o be your best route. i may have a jet kit that fits one of your carbs sitting in a drawer but it may be for a mikuni style carb what shape are your jets? i dont remember off hand if they are a diff style than what i have laying around. if you have jets that will fit the 150 carb and can lower jet size id try that before sending back but if you have no jets you could block off some of your high flow air filter for the smaller carb till the fuel is closer to right. i had water getting into my filter issues at one point and used some plastic cups from the dollar store and hot glued it onto a filter for the rainy months at one point and it restricted the filter some so i could jet a little lower too. maybe an option here till you can get the parts needed to get things right and not cause damage.
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groundloosers
Scoot Member
Learn from your mistakes, live life and have fun.
Posts: 59
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Post by groundloosers on Sept 21, 2019 13:02:09 GMT -5
Sorry about the image, my computer isnt really good with uploading images to this website, I have uploaded them to google through a sharable link, drive.google.com/file/d/1-JqJGnrVUb7x8AXEg3JQpZFYFOLTLZ7h/view?usp=sharingdrive.google.com/file/d/1CvHj5WldTA-eP1WrtPm9HZ9X2-VWhhlN/view?usp=sharing I have been told that the 150cc carb allowed too much air to enter the combustion chamber so for Now I am experimenting with the stock carb, the only size jets that I have with the 150cc Carb are a 100-140 not including the stock 103 main jet that cane with the 150cc carb. With the stock 49cc carb I have Jets ranging from 78-98. Judging from my plug it looks like I am running Really rich, which could explain the hiccupping as shown in my video. My question is If I find the perfect jet, How will I know that that jet will be the right one? I have also herd that nedle adjustments are necessary if I have a free flow air filter and a high flow muffler. |
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Post by tortoise2 on Sept 21, 2019 13:24:33 GMT -5
If I find the perfect jet, How will I know that that jet will be the right one? Shades of Yogi Berra! |
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Post by chehystpewpur on Sept 21, 2019 13:55:39 GMT -5
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Post by chehystpewpur on Sept 21, 2019 14:00:17 GMT -5
any yes you were running pig rich on that plug. and is why the motor was cutting up as its called but not to be confused with cutting out. very diff things.
also no such thing as letting too much air into a motor. all a motor is is a fancy air pump. the cylinder can only suck in as much air as it needs. its the ratio of air to fuel that matters and you had too much fuel. with the small carb most likely too little fuel. i would work my way down from the 98ish jet but pry safe to start at 90 as a 103 is clearly drowning the poor lil guy.
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Post by tortoise2 on Sept 21, 2019 14:50:21 GMT -5
no such thing as letting too much air into a motor In the context of a CV carb . . velocity of throttle bore air flow past #7 slide vacuum port raises main jet needle. Larger throttle bore 150cc carb may lack enough velocity to properly raise main jet needle (as previously posted). ![]()  |
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Post by chehystpewpur on Sept 21, 2019 18:51:37 GMT -5
i do agree tortoise too little air velocity can cause a carburetor to not function properly but thats not quite the same as air volume. the motor still wanted the air it just couldnt make the carburetor's vacuum diaphram operate properly. its where the term over carbbing comes into play and people do it all the time with v8's but the motor still wanted/needed the air it just cant make the fuel system work right.
now if were talking boosted motors thats 100% true that there is too much air for a motor but thats user error or bragging rights. 150lbs of boost on a motor is fun to watch though especially when it turns into an exploded diagram infront of you so long as its not your motor.
i dont really like cv carbs though so sometimes i do forget about that stupid diaphram controlling the throttle ive always ditched them as soon as i could. the first time i cleaned one and the diaphram ripped from using carb cleaner was the final nail in the coffin for those things for me.
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groundloosers
Scoot Member
Learn from your mistakes, live life and have fun.
Posts: 59
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Post by groundloosers on Sept 22, 2019 22:28:32 GMT -5
Chehystpewpur and tortice thank you both for your excellent and meaningful advice. I got it running again, I put the stock airbox back on with the stock jet and everything seems to be running smoothly, I returned the 150cc carb and installed the stock carb, next week I am going to try to tune the carberator to accept the open stack air filter( I just put the stock box on because I miss riding my scooter) next week I'm going to attempt to put on the open stack air filter and tune the carb for the correct jet, if I need any more advice I'll let you know, you guys rock👍
Just out of curiosity what jets are you running with your air filters? I know several factors are involved such as tempature, sea level, etc.
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Post by chehystpewpur on Sept 22, 2019 22:49:30 GMT -5
i have a 2 stroke scoot so my jetting numbers will be different and im dealing with jetting headaches of my own as too many variables changed at once more or less. water pump failed in the middle of a watercooled conversion so it was parked. doubled up my radiators after i moved and realized the pump had failed so i switched to an electric one. i thought i had cooling issues before due to it being so hot down there 100+ degree days. during my move i moved from fl seal level to mi and have about a 1000 foot elevation diff and less humidity. got my larger reed block back in and needed some more fuel but im back up to about a 110-112 main jet its looking like. i was around a 118 before. i have a 21mm flat slide carb with a power jet/power valve that adds some fuel at wot so yet again somewhat diff. and i accelerate at 10k rpms and rev to 12k after cvt maxes out so fuel numbers will be pretty high. cruising rpms are around 9kish too which should be around your max rpms. i run an open uni style filter but will hopefully be changing that as its so loud and has been somewhat of an annoyance to me and apparently one neighbor but he can suck eggs as he complains about people talking too. my main complaint and reason for a new intake other than its loud is it hits the frame on my scoot and im afraid it will pop off again and puts stress on my intake rubber boot so they wear faster than they should.
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