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Discussion Starter · #1 ·
hey guys, im newish to pocketbikes, just got a cat eye 49cc pocketbike picked it up for $75, i broke it down to nuts and bolts and put it back together (wish i would have found this forum with the diagrams like i did today before putting it back together) everything went pretty smooth when i put it back together and went to start it the bike wouldnt start without starting fluid so to save time and seeing their is a china bikes parts dealer 7 miles away i went and snagged another carb for $24 and threw it on. the pocketbike started right up and even throttles fine but when i put it on the ground and ad my large body to it the bike bogs down and dies, it will gas up and down all day as long as their is no weight on the bike. please please can anybody give me an idea as to whats stopping me from riding this hog.

any input would be greatly appreciated
 

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Discussion Starter · #3 ·
ok i would like to try to do that, is there any chance you could break it down which way do i turn that little screw above the fuel line, and how what position or which way do i turn to start over from factory default or where its recommended to start. sorry if that dont make much sense, but if your able to understand what im trying to say id be happy if you could help in anyway. also would you have a suggestion as to which upgrade would be the most productive for the lowest dollar, id like to order something tonight while i still have a few dollars in my account cause by tomorrow noon im sure i wont have an extra dollar so id like to get something tonight or goto the parts warehouse down the road and grab it. thanks for any time already spent.
 

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Discussion Starter · #4 ·
was out looking at my sparkplug, and it appears to have oil/gas on it, shiny and wet. would this mean im too rich ?? and could that be the problem making me stall out when i sit on it and give gas?
 

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was out looking at my sparkplug, and it appears to have oil/gas on it, shiny and wet. would this mean im too rich ?? and could that be the problem making me stall out when i sit on it and give gas?
well whats the color of the electrode?

shiny and wet is an example of running too much oil in the fuel..............You gotta get the correct air to fuel ratio now...........

I mix 3 1/2 ounces of oil to a gallon of 93 octane.....


 

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Discussion Starter · #6 ·
Ok i took a pic of the plug and im hoping you might be able to tell me, im sorry but i have no mechanical training what so ever and im learning as i go (thank bob! for the internet) i only know how to fix the problems ive had and overcame, so im hoping i can ad this to the list today. i also added a pic of the pocketbike so that if im wrong on what model it is maybe someone can educate me a bit. also would love to hear a suggestion on what you might feel is the best upgrade for a pocketbike to increase speed, wanting to know if you could do any upgrade to the bike to make it go faster what would be the thing you would want to do most???
 

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Ok i took a pic of the plug and im hoping you might be able to tell me, im sorry but i have no mechanical training what so ever and im learning as i go (thank bob! for the internet) i only know how to fix the problems ive had and overcame, so im hoping i can ad this to the list today. i also added a pic of the pocketbike so that if im wrong on what model it is maybe someone can educate me a bit. also would love to hear a suggestion on what you might feel is the best upgrade for a pocketbike to increase speed, wanting to know if you could do any upgrade to the bike to make it go faster what would be the thing you would want to do most???
Its all good man...Youre doing great so far......Thats what this forum is about...helping you out>>>>>>>>>:thumbsup:

You have a plug thats burning a tad rich and your mixture is a bit off which isnt too critical compared to the air to fuel ratio.........You need to tune it........

Start bike up and allow it to warm up...lift the rear wheel and full throttle the engine,,take a screwdriver and turn the highspeed adjustment screw on the side of the carb clockwise in very short incriments til you get max wheel revs then fatten it back up a smidge for safety.Then test ride it..Theres a good chance you may need to tweak the lowspeed needle a lil bit too.............make sure the plug is gapped to .030" and the fuel mix ratio is 40-50:1 and burning premium fuel between 91-93 octane...........Good Luck
 

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Discussion Starter · #8 ·
Here is a pic of when i bought it for $75, i may have got taken on it i guess, so far i have put $38 into it including a new carb so total investment is now at $113 for the bike. in my mind 100bucks is awesome for something i can ride around out here in the country just for fun.

i am currently trying to repair all the panels of cracks and missing pieces, is there a particular way or product anybody can recommend that i can patch the panels with??? ive tried jb weld and a product called quick steel, the quick steel worked pretty good, sanded and painted great but one area keeps cracking over and over when sanding and i was wondering if there is a better product i could use for plastic repair and patches
 

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Theres ways to make that engine a screamer but it takes a lil time,,a dremel,,hp clutch spring,,hp exhaust ,,modding the clutch and flywheel and adding a rocket key.Good Luck
 

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Discussion Starter · #10 ·
Its all good man...Youre doing great so far......Thats what this forum is about...helping you out>>>>>>>>>:thumbsup:

You have a plug thats burning a tad rich and your mixture is a bit off which isnt too critical compared to the air to fuel ratio.........You need to tune it........

Start bike up and allow it to warm up...lift the rear wheel and full throttle the engine,,take a screwdriver and turn the highspeed adjustment screw on the side of the carb clockwise in very short incriments til you get max wheel revs then fatten it back up a smidge for safety.Then test ride it..Theres a good chance you may need to tweak the lowspeed needle a lil bit too.............make sure the plug is gapped to .030" and the fuel mix ratio is 40-50:1 and burning premium fuel between 91-93 octane...........Good Luck

I really appreciate your help, people like you are what make this forum great.

im going out side to try it now, but first what sparkplug do you recommend, through internet searching it says to use CHAMPION- cj8, another says cj8y i think. which would you use in this bike, and i seen to gap it at .30, correct?
 

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Here is a pic of when i bought it for $75, i may have got taken on it i guess, so far i have put $38 into it including a new carb so total investment is now at $113 for the bike. in my mind 100bucks is awesome for something i can ride around out here in the country just for fun.

i am currently trying to repair all the panels of cracks and missing pieces, is there a particular way or product anybody can recommend that i can patch the panels with??? ive tried jb weld and a product called quick steel, the quick steel worked pretty good, sanded and painted great but one area keeps cracking over and over when sanding and i was wondering if there is a better product i could use for plastic repair and patches
Its all good...$75 bucks is a pretty good deal and the total so far isnt too steep....from the pics it appears you have gotten a pretty good deal so far

to repair plastic cracks i use a plastic welder I fabbed from a soldering iron or i use Permatex plastic welder epoxy............the epoxy actually melts into the plastic to strengthen the repairs.............

 

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Discussion Starter · #13 ·
hey i like the idea of a plastic welder, would you mind telling me how you made your sodler gun into one? if you use the sodler gun do you have to buy the epoxy? or would you just use some other kind of plastic to melt into it. thats an awesome idea, **** im learning a ton in this place, i goto alot of different forums but this one by far has been the most helpful
 

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Discussion Starter · #15 ·
Its all good man...Youre doing great so far......Thats what this forum is about...helping you out>>>>>>>>>:thumbsup:

You have a plug thats burning a tad rich and your mixture is a bit off which isnt too critical compared to the air to fuel ratio.........You need to tune it........

Start bike up and allow it to warm up...lift the rear wheel and full throttle the engine,,take a screwdriver and turn the highspeed adjustment screw on the side of the carb clockwise in very short incriments til you get max wheel revs then fatten it back up a smidge for safety.Then test ride it..Theres a good chance you may need to tweak the lowspeed needle a lil bit too.............make sure the plug is gapped to .030" and the fuel mix ratio is 40-50:1 and burning premium fuel between 91-93 octane...........Good Luck

ONe other question i had was, what fuel mixture would you use for this pocketbike, i was told and thought it was 32:1 if thats not it please let me know so i make sure i dont burn my motor up
 

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ONe other question i had was, what fuel mixture would you use for this pocketbike, i was told and thought it was 32:1 if thats not it please let me know so i make sure i dont burn my motor up

32:1 is for most oldschool chainsaws and break-in.........after an engines properly broken-in you should thin the mix by raising the ratio to get a cleaner burn and keep a cleaner piston top and exhaust port aswell as control excessive spooging from the pipe.............

i run most engines on 42:1 for safety ,,50:1 for pep and 100:1 for extreme power..............
 

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Discussion Starter · #17 ·
Im sorry guys but i need a bit of help again, apparently im an idiot and cannot find this second screw you speak of. where is it on the carb? the screw if been fooling around with is directly above the fuel line inlet. please help i am excited that the bike finally runs but i just cant ride it as soon as i sit on it and give it gas it dies, but it runs perfect sitting on a cinder block throttles great
 

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Im sorry guys but i need a bit of help again, apparently im an idiot and cannot find this second screw you speak of. where is it on the carb? the screw if been fooling around with is directly above the fuel line inlet. please help i am excited that the bike finally runs but i just cant ride it as soon as i sit on it and give it gas it dies, but it runs perfect sitting on a cinder block throttles great
On the carb top theres a slotted brass screw.....In the center of that brass screw is a small slot...It takes a small jewelers screwdriver to make the lowspeed adjustment...Try leaning out the needle about 1/8-1/4 turn....as the engine leans out the idle will get higher..adjust the idle screw as needed......after getting the idle dialed in retune the highspeed needle......Good luck

 

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Looking at the front bore of the carb it should be on the right side of the carb in the middle. If you don't have one, there show be a small hole with threads, don't think it will run very good without. Stuff vibrates off these bikes all the time, I have 9, Cam2 has ????? Hundreds,lol, so we have been thru these same problems. Here is a Boosted306 ported Cag engine I put a 15mm Walbro SHA copy carb, can you see the spring and screw on the side?? It's the brass screw w/ spring near the black manifold near the middle of the 3rd photo.
 

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Yep Loctite helps out alot with keeping things tight and right where they need to stay..........without loctite you can literally see hardware raining off the bike while it sits and idles............Good Luck
 
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