Here’s my intro - Pocket Bike Forum - Mini Bikes
 
LinkBack Thread Tools
post #1 of 6 (permalink) Old 11-29-2018 Thread Starter
Junior Member
 
Join Date: Nov 2018
Posts: 3
Here’s my intro

Oh look another new guy! Well I probably fit the new guy profile with my intro of saying I found this bike and picked it up and SURPRISE it needs work...

As soon as I can figure out how to post photos from my phone, I will. I think I have a 49cc 2 stroke X8. Trying to get it running before Christmas. I was able to rebuild my CBR but this little thing that seems more simple is turning out to be more complicated.

So far, I have replaced the battery, main fuse next to the key (it just didn’t have one), cleaned the carb, and replaced the spark plug. I am getting spark. The battery was turning over the motor as long as I held down the start button and left lever. As soon as I let go of either, it stopped turning the engine. Never got it to fully crank. I read a lot about everyone switching back to pull start and it is still on there but of course my 8 y/o will want his to start like mine.

Now the battery seems to be already dead, after tinkering today. Plugged up the charger and the green light doesn’t go to solid red for charging (like I am used to with his other pocket bike that’s completely electric). The green light stays on and every couple of seconds it quickly blinks red one time. Maybe need new charger? Maybe the battery is just too dead? Maybe it needs a new charge controller?

Any help is appreciated. Also, if it’s not possible to post photos from my phone browser, let me know how to do so and maybe I can get some uploaded sooner than later. Thanks ahead for your help!
Redlift is offline  
Sponsored Links
Advertisement
 
post #2 of 6 (permalink) Old 11-29-2018
BUILDEM,WRECKEM,REBUILDEM
 
CAM2's Avatar
 
Join Date: Mar 2008
Posts: 20,902
Re: Hereís my intro

Welcome to the forum..

The 2 stroke engines are merely backpack tool engines with electric start/generator combos installed onto them.

The electric system is more of a problem than a luxary but I see youre dead set on having one...

Just know when the battery gets weak and has diminished amperage it cant properly crank the engine...most use a car battery or cordless 18v battery to jump the e-starter and that weakens them aswell as they just eat themselves up if the voltage has nowhere to go.


I have a couple wiring schematics where it simplifies the wiring for e-starter.


its easy to add the charging system to it aswell as add-in the lighting by finding the wire that feeds the power which if I remember right is either blue or brown...

First thing Id do is start the engine via pullstarter and measure the A/C voltage coming out of the tab when it becomes a generator and out of the rectifier if possible...If the voltage comes with-in specs..

The charging system is 50 watts...Its usually rule of thumb 12.5v a/c x 4 amps - 50 watts

Theres a possibility seeings the e-starter has zero cooling at he brushes they are all worn down and youll need to replace the e-starter

When alls said and done youre looking at around $80-120.00 for a new battery and an e-starter.......a brand new engine with e-start isnt much more than tht and a more cost effective choice

The cheapo trickle/storage chargers they sell at harbor freight for $5 bux work better than the pocketbike crap.

Good Luck

Cut
Up
Stuff
To
Obtain
Masterpiece
CAM2 is offline  
post #3 of 6 (permalink) Old 11-29-2018 Thread Starter
Junior Member
 
Join Date: Nov 2018
Posts: 3
Quote:
Originally Posted by CAM2 View Post
Welcome to the forum..

The 2 stroke engines are merely backpack tool engines with electric start/generator combos installed onto them.

The electric system is more of a problem than a luxary but I see youre dead set on having one...

Just know when the battery gets weak and has diminished amperage it cant properly crank the engine...most use a car battery or cordless 18v battery to jump the e-starter and that weakens them aswell as they just eat themselves up if the voltage has nowhere to go.


I have a couple wiring schematics where it simplifies the wiring for e-starter.


its easy to add the charging system to it aswell as add-in the lighting by finding the wire that feeds the power which if I remember right is either blue or brown...

First thing Id do is start the engine via pullstarter and measure the A/C voltage coming out of the tab when it becomes a generator and out of the rectifier if possible...If the voltage comes with-in specs..

The charging system is 50 watts...Its usually rule of thumb 12.5v a/c x 4 amps - 50 watts

Theres a possibility seeings the e-starter has zero cooling at he brushes they are all worn down and youll need to replace the e-starter

When alls said and done youre looking at around $80-120.00 for a new battery and an e-starter.......a brand new engine with e-start isnt much more than tht and a more cost effective choice

The cheapo trickle/storage chargers they sell at harbor freight for $5 bux work better than the pocketbike crap.

Good Luck
So I’m kinda following you but since mine already has the e-starter are you suggesting that I disconnect and set up as a pull start to start over with a new e-starter? Current one is turning the motor over if I hold it down but the motor doesn’t actually start. I’m getting air and spark so I guess it may be a fuel flow issue?

Main problem is that I’m just circling back to the beginning now that my brand new battery isn’t charging with the charger after a single day of trying to use it. I could definitely use the wiring schematics to compare my current setup. If I can get back to successfully charging, I may be able to move on to diagnosing the fuel issue to get it running.

I’ll swing by Harbor Freight and grab a new trickle charger if my Megaboost battery maintainer doesn’t do the trick.
Redlift is offline  
Sponsored Links
Advertisement
 
post #4 of 6 (permalink) Old 11-30-2018
BUILDEM,WRECKEM,REBUILDEM
 
CAM2's Avatar
 
Join Date: Mar 2008
Posts: 20,902
Re: Hereís my intro

Quote:
Originally Posted by Redlift View Post
So Iím kinda following you but since mine already has the e-starter are you suggesting that I disconnect and set up as a pull start to start over with a new e-starter? Current one is turning the motor over if I hold it down but the motor doesnít actually start. Iím getting air and spark so I guess it may be a fuel flow issue?

Main problem is that Iím just circling back to the beginning now that my brand new battery isnít charging with the charger after a single day of trying to use it. I could definitely use the wiring schematics to compare my current setup. If I can get back to successfully charging, I may be able to move on to diagnosing the fuel issue to get it running.

Iíll swing by Harbor Freight and grab a new trickle charger if my Megaboost battery maintainer doesnít do the trick.
What I explained is the steps bascally to take in order to save time and money unless money isnt an object.

First thing I would do is charging the battery using a real charger on 2 amps then load testing it..

Second thing to do is get the thing running so you can do the test on the e-starter....

Sparkplug is NGK BPM6A gapped to .030"

Fuel mix is 50:1...

Coil to flywheel airgap is .020"

Carb is a knockoff of a real walbro WYK192 and $10 bux on ebay but you can get the upgrade package for a lil more...
https://www.ebay.com/itm/Carburetor-...LEM:rk:53:pf:0

Good luck

Cut
Up
Stuff
To
Obtain
Masterpiece
CAM2 is offline  
post #5 of 6 (permalink) Old 11-30-2018 Thread Starter
Junior Member
 
Join Date: Nov 2018
Posts: 3
Re: Hereís my intro

Quote:
Originally Posted by CAM2 View Post
What I explained is the steps bascally to take in order to save time and money unless money isnt an object.

First thing I would do is charging the battery using a real charger on 2 amps then load testing it..

Second thing to do is get the thing running so you can do the test on the e-starter....

Sparkplug is NGK BPM6A gapped to .030"

Fuel mix is 50:1...

Coil to flywheel airgap is .020"

Carb is a knockoff of a real walbro WYK192 and $10 bux on ebay but you can get the upgrade package for a lil more...
https://www.ebay.com/itm/Carburetor-...LEM:rk:53:pf:0

Good luck
Thank you!
Ordering the new upgraded carb kit. I'll check the gaps for proper measurement. Also, someone decided to put a sticker, on the tank, that says it requires 20:1 fuel. Probably explains why the old spark plug was caked with oil.
Redlift is offline  
post #6 of 6 (permalink) Old 11-30-2018
BUILDEM,WRECKEM,REBUILDEM
 
CAM2's Avatar
 
Join Date: Mar 2008
Posts: 20,902
Re: Hereís my intro

Quote:
Originally Posted by Redlift View Post
Thank you!
Ordering the new upgraded carb kit. I'll check the gaps for proper measurement. Also, someone decided to put a sticker, on the tank, that says it requires 20:1 fuel. Probably explains why the old spark plug was caked with oil.
Thats the chinese....As I explained these rideables utilize tool engines.

20:1 is the recommended oil when using as a tool engine and also very very high in maintainance when done so..Also the chinese' secret way to get you to kill your bike faster so you buy replacement parts or another one...

What appears to be a dirt cheap innocent lil toy is actually a money trap on wheels for the ones that cant register the difference..............

Its definately broken-in so if you want to run it on a safe but a lot better mix run it at 40:1 using 91-93 octane premium fuel

If you want a lil more performance run it at 50:1 using 91-93 premium fuel

I break my pump gas engines in at 32:1 and run them at 50:1.

Lots like Amsoil brand 2 stroke synthetic oils...Im more partial to the oldschool stuff still;- Golden Spectro synthetic..

Good Luck

Cut
Up
Stuff
To
Obtain
Masterpiece

Last edited by CAM2; 11-30-2018 at 11:37 AM.
CAM2 is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Pocket Bike Forum - Mini Bikes forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome