Motorized Bike wont start Solutions 

My two cents for what it's worth: I thought my new BikeBerry kit was junk when I first put the bike together. I just couldn't get it started. I wasn't getting any spark. I tried everything. I called the 800 number hot line a bunch of times. I did the ohm meter tests with the CDI and the Magneto. The values were all within range. I changed spark plugs three times. What it came down to was: I wasn't peddling fast enough!! The magneto (at least mine) just wont make spark unless it's really turning over at a pretty good clip. Once I figured that out, I pedal the bike to a very fast speed when I can (I'm an old dude and this is hard on me) and then release the clutch and it usually pops and starts up fine. One other tip: when you need to come to a stop for what ever reason and you've pulled in the clutch and sitting there pulsing the throttle.....when it's time to take off again, don't just release the clutch and twist the throttle like you would a motorcycle. You'll stall the engine. You gotta start peddling again to get the bike moving before releasing the clutch. It's like every time you start to move, each time is the first time. Don't just dump the clutch. It will stall and you'll think (like me) something is wrong with your engine setup. Good luck.

Thanks so much! I just bought a motorized bike that wouldn't start and this video is just what I needed! My bike is now running great!

This video did the trick! I had been having trouble starting and when I seen this video and followed the instructions to ride the bike for 2 minutes with it fully choked and then open it wide and hit the clutch. It started right up and that 80cc motor is fast.

Thank you that really helped my bike wouldn't start until I disabled the kill switch and now it's running thank you that was a big help

DUDE! I have to give you a very heartfelt Thank You for this vid!- I had everything double triple checked and I got NADA, I was about to tear the whole Damn thing apart and redo it -the mag looked a little out of alignment, but I watched this vid and went back out and just gave it a few more runs and sure enough, she kicked over finally and runs quite nicely now! This vid saved me lots of time and I don't even know how much money just for reminding me to be patient and keep pedalling that sucker!! Compression and spark!! Thanks.

I was having same problem ,I had spark and compression but didn't start ,I dropped a bit of gas on spark plug hole and bam!!! That did the trick!!

Video still helping. Mine sat a few weeks and wouldn't start. Pulled the carb screw at the bottom to let some fuel through then ran full choke and sputtered. Turned choke off and it fired right up. It was really awesome because the neighbors were outside.

The button on the carburetor is a primer button for cold start that will keep ya from squeezing hose

Hey there ThunderHead289. First off , Thanks for the video. I was wondering at what gap did you set your spark plug gap on the champion CJ7Y? I am wanting to swap out the stock plug that came in the kit. Thanks in advance.

The spark test was very helpful.Thank you very much.😁😁

So I have an 80cc motorized bike I've had it for about 2 months. Its been running great but the other day I was driving and it started bouging out so I pulled in the clutch and released it and it will not start so I ordered a spark plug and a coil for it . now I don't have the ignition hooked up never have anyways I just watched a few of your videos on how to fix it thank all of u guys out there for knowing how and taking the time to teach us Bobby Reynolds

thanks, just got my bike together and now comes the fun, starting it!

Thank you. It started right up when i pedalled fast while the choke was fully open.

Thanks for the help, will try all of those

The "coil" is a CDI unit. It's fed from and triggered by the magneto which sits inside the side cover just after where the clutch arm goes in. The "little button" is a valve that floods the carburetor chamber somewhat like a primer bulb on a chainsaw or weed whacker.

thanks for the help! couldn't figure out what was wrong, just wasn't riding it long enough to get enough gas in it

Hi Thunder, my bike does start with a lot of effort. The thing is it seems the carb is always making the mixture pretty rich, no power slow response... I have done everything but it seems like the carb is defective...

also tank vapourlock will likely stall and prevent your bike from starting

the choke tips worked for me. thanks boss.

Thanks for the help.

Where do you get a test light for the cdi?

With a filter like that did you have to re jet the carb?

does the clutch have to be popped to draw gas into the engine?

nice, thanks for the info !

what should the gap be on the champion plug?

Thank you! My son dropped the bike and I couldn't get it to start. The kill switch was stuck in. What a relief that's all it was.

Very helpful Thanks dude

Hi I just finished my bike. Everything is in order except one thing. The fuel isn't leaving the carb. I have spark because I checked. I hear the engine turning when I try to start it but there's no fuel. I know there's no fuel because when I checked the spark plug it didn't smell like gas. I've pressed the tickler to the point where it leaked out of the air filter. When I attempt to start it I flip the choke too. What do u think I should do?

cool video thanks. im having a little trouble with mine i think its the spark plug.

So my bike won't start. Getting power to everything but I noticed the magneto has to be set a certain way otherwise it'll throw off the spark timing and will sound like there's no compression until it's back in the right spot. It picks and chooses when the crankshaft wants to turn to the right angle. How do I get the shaft to stay in one spot? Thanks!

Hey I've got a spark but when I take the spark plug out like you say I got the compression it's revving up like it's supposed to when I push it when I put the spark plug in it's nothing

My engines brand new the clutch and chain are adjusted correctly when I have the clutch out it just drags the back wheel have spark compression

Can ya help when I ride my motorbike and u let out the clutch and it try's to run the tire get stuck

mine pops and won't respond to throttle but if I I starts when I'm lucky it will Rev with out the clutch engaged so it's not the carb I figured but it was running fine the last couple days

Dude thanks for the help, bought a new kit and installed it and it stopped running day two.. did all this stuff to try and get it started again and all it needed was a cleaned off spark plug haaha

Mine wont start!! I have tried everything. Spark plug has electricity. What can it be? I'm using Walmart Super Tech TC-W3 outboard 2-cycle oil which is the best oil for jet skis. I use it on my 2004 Yamaha XLT 1200 since I bought it. Can that be the problem? Oil maybe? I'd really appreciate your help!

Thank you this worked your awsome

Hello. So been riding the bike for a while but this morning it seems like the engine has ceased. I have taken the spark p,ug out i have removed the chain but I can't get the engine to turn. It won't pedal. Any thoughts

Any chance you can provide some guidance on lining up the chain. My chain keeps sliding and jumping off the sprocket. Ive tried hours of lining up the chain tensioner but still no go.

Hey my chain completely stopped moving when I tried to ride it without the spark plug? Any advice?

So if the kill switch is bad when u try starting the bike after pedaling does it turn over then when u slow down it just dies

My bike is sparking and it’s just not completely kicking over I have a exhaust without any baffling it’s shooting flames when’s I drop the clutch a twist the throttle to help it start the spark plug is only 2 weeks old could it be my cdi

yeay i got it started it was clutch needed to be adjusted. im so happy thank you for your help. people dont give up just follow this guys videos and you will learn alot even on comments people ate helpfull good luck people im going for a good ride

I built mine right before winter last year and rode it for a couple days. It took a long time before the engine finally cranked over. Then with winter I had it sitting out in the shed. Pulled it out today and gas'd it up and man are my legs tired and sore. I just couldn't get it to start up. You think because I had it sit for a while that maybe some gas in the tank evaporated and left more oil then gas and that my be causing my trouble? Gonna try again tomorrow if my legs can handle it. I know it's getting a spark and my kill switch hasn't been a issue that I know of.

Hi when I'm on my bike,I let out the clutch but there's no life,I have spark and compression,don't no any ideas ?

I have to push the primer button until fuel starts leaking from the carb, and the choke on before mine will start, or it will take me a block to start if I don't

Thanks!

Having a problem to get the chain and medals to move everything all hooked up

Please help...when i open the clutch arm case,theres a red and black electrical wire hanging loose.I do not know where its wired up to but my 80cc engine wont start..i had this engine atleast 3 months and it ran great until the engine rattled and shut off...please help...i dont know what the problem is...oh and the spark plug works..i have tested it ....so its not the spark plug .......PLEASE HELP!!!

How long would it take when u run out of gas and put gas again now won't run

Heyy man i can’t get mine to work I bought it brand new and I followed all the steps but I notice when I put the spark plug in the engine doesn’t want to run and then when I take the spark plug out the engine runs perfectly but when the spark plug isn’t in the engine all the air come out from where the spark plug goes instead do you know why is it doing this ?

thanks this information got my bike started...;.

I just bought one of these kits when I first got it, it ran fine then, I let it sit over night and now it won’t start. It fires, but won’t run. And now the clutch won’t disengage. And it leaks oil from the top engine bolts, and the muffler.

I had just barely finished my kit. I am having a hard time starting it indeed, I pedaled probably a good 2 blocks worth. I removed the spark plug. Appears wet from gas. I also tried with the kill switch disconnected. Still no start. I'm going to continue trying tomorrow.

i assembled my kit. Peddled. Had a thunka sound. Then clutch locked up while engaged. Couldn't peddle. Tightened clutch flower. Now i can peddle while engaged but no thunka sound. Any ideas? thank you

I have to pedal a while before the motor will even turn on,, it would turn on quickly before..

Hey thunder,is that a second fuel line you have adapted to your carberater?

Pour a tiny cap full of gas straight into the spark plug hole then put the spark plug back in and try to start it.

Dude where did you get your bike

right so I have spark , I have compression and it just stalls out . was running fine let my friend ride it rode fine then about 1 hr later go to start it up and release clutch and tries to go , give gas bogs out , if pull clutch back in it dies instantly .

Hey I have a question I have a 80cc motorized bike and when I disengaged the cluch the rear tire locks... Can u give me any suggestions ?

Hey how's it going this is the first bike I'm doing the motor okay the motor and stuff runs I took it off of a mountain bike and put it on a beach cruiser I got big handlebars I'm going to have some issues and I know get any advice I got to swim I'm putting a I guess a china doll with the souped up head I got the round head on the front where spark plug is the better head was 66 bucks they probably costed as much as the motor I don't know I'm going to have questions I mean I'm watching the video of doing the best I can it's my first one

I have spark coming out of the spark plug the carburetor is good but for some reason when I changed out the piston with the O-rings on it, it didn’t want to start anymore does anything in the motor have anything to do with it starting upBecause my carburetor is brand new and there’s plenty of spark coming out?.

Hey poster I got the same bike and am having trouble replacing the ignition coil I rode the bike once and the wires arched of the frame and the bike been sitting for over a year now help !!! Where can I get this coil at ???

While trying to start my 🚲 I let go the clutch and its just free wheel

My bike kit runs. But will not stay running. Will ride with pedal assist the whole time. But won't idle and sputter and die. It has great spark. Steady fuel flow. I haven't messed with the motor at all. It's brand new. I can't figure it out

Some people would just hold the plug to the Engine without having it plugged into the wiring harness. I know it sounds ridiculous to explain that, but you’re dealing with the general public.

I bought a new cdi and magento and spark plug it still wont start up

I've spent nearly 3 days now on trying to get this to turn. Mines a brand new kit. Here is what I've done so far... Checked the clutch made sure its working correctly (from what I can tell yes) Pulled the carb apart and made sure the float and jet and everything else inside of it and that appears to be alright, seems to not have a vacuum issue. Checked for any cracks or holes on the engine itself and don't see anything off hand. Made sure chain is tensioned pretty tight. Swapped out spark plugs and made sure there is a spark (one thing I didn't do yet was gap the new plug. Just thought of that as writing this so I'll give that a go) Fuel ratio as of current was 16:1 but now its 32:1 as there were some suggestions of trying that. At most I can sort of get it to pop when I walk it and or ride really slow with the clutch popped but it has yet to turn over. ... I am starting to get to my wits end, I'm not super mechanically inclined but if anyone has suggestions that I haven't tried I'm willing to give it a shot. Edit: I have also rode it for roughly 20 minutes to get the motor primed even tried pouring a small amount of gas where the plug goes.

It will kick over but it won't hold, it slowly dies out. How do you fix it?

This saved me lots of head scratching

I don't know what state you're in I'm in Ohio I'm not sure what the laws are I think we just need a headlight or you know what I mean a light in the front I never worked on one of these like this before I like to get it done by morning I'm trying to figure out where to line the motor up at oh and I do have one little problem like the front where the u-bolt goes to lock in one of them's broke off so I'm going to have to rig up something for it I don't know can I send you a picture of what I'm working with I'm not sure if I could do it

My issue is it will start and run perfectly but i have to pedal hard and drop the clutch at least 20 times messing with the choke to even get close. When the engine warms up tho it is a lot more reliable to start but it has to be really hot

I just CANNOT get mine to start..😥 I had tested spark and unplugged the killswitch as well...

What kinda carb is that??

I have to spray ether/starter fluid into my air filter to get mine to start. as long as its not super cold out that usually works but I have to do it every single time. any ideas? I can't get it to idle at all either. I have messed with the idle screw without luck but this isnt a big deal really. i dont mind starting it back up after stops because after its been running it starts right back up. the first start is always a huge pain in the ass though.

I Call that little button "the tickler"

I hope your suggestions work sir

ThunderHead289: When you're starting your bike for the first time you don't have to pump the throttle first too do you?

There isn't a hole lot of room in my bike frame, and I just got it done, it won't start, is it okay that the carb sits at a slight tilt?

my bike wont start but there is something strange when i open the electric compartment i turn the wheel with the clutch disengaged or in other words without pressing the clutch and when i turn the wheel the magneto magnet moves but when i press the clutch the wheel will move but the magneto magnet wont so i am not sure what could be the problem so far it is supposed to move when i press the clutch not when i release i have 4 months with my engine and i could never get it started , the question is should the magnet move when i release the clutch or when i press it ?

I think I got dirt in my gas and I ran it and I think the my carb is all gunked up

Thanks for this i seem to have this actual problem where i have spark but bike wont run. I havent actually pedalled for more than a few seconds so ill try the 2 min as you suggest

My bike won't start with the choke on.also runs really rich,no idea what to do or what size jet to buy.

I've been working on one I bought second hand and mostly put together. I bought a new cdi, new magneto, and I've checked that I do have spark. Bought a new carb. I've peddled my ass around the block more times than I can count and nothing. I'm at a loss at this point. I've tried all sorts of different choke...nothing. Fuel, check. Spark, check. Unplugged kill switch, still nothing. This is frustrating.

hey! so i got my bike running the first time then some bolts fell out such as the part on the end of the muffler and now i dont have any compression not sure if i even have spark, will getting a new muffler fix it, if not fo you know what will. thanks!

I have problem for my motorized bicycle, I first time start and when I check spark plug is not working also my carburetor is leaking gas.

I replaced magneto cdi and carburetor and nothing.did it all this morning and won't start

spark tester will work better

I have tried everything have change everything and still want start but it wants to but it want

I rid mine afew times in one day it was great. Then all of a sudden it won't let me pedal or move the rear wheel at all I'm not sure if it's the chain or the wheel. Any suggestions ?

What should i do if my engine is not trying to start when i leave the clutch out the back wheel just locks

i am having a problem starting it too...when i first got it it wouldnt but iv had it for months now and now it just wont start...when i get on the bike and start peddiling fast and pop the clutch,you hear and feel the engine turning and when i oull the throttle a little you hear noise as if trying to start like...pull vrrrr...pull vrrr but it just wont start i got an extra cdi a new spark plug and it was leaking gas from the carb but i fixed that i just donno what to do now...please help asap. thanks!

What is that tank below your gas tank? Extra fuel?

I have tried everything you mentioned and still won't start

My bike automatically speeds up to about 15 miles per hour with no throttle and when i pull in the clutch it revs really high and loud... like somethings gonna get broken high. Its brand new so i know this is gonna be real bad if i dont fix it. Do u know what it could be?

I got fuel but no spark on my 80cc motor how do I fix that? It won’t start it was working perfectly fine yesterday even tho it didn’t have spark

just want to know if my blue coil wire is connected to black will it stop it from running

My carb isn't sucking fuel. Any tips appreciated...

hey ive got a bike motor problem, it was running good the first few times i rode it but then all of a sudden it wont start............. when the clutch is released it won't start at all and is still very easy to peddle when clutch is released what do i do