Go Back   ChinaRiders Forums > Technical/Performance > Dual Sport/Enduro
Register FAQ Community Calendar Today's Posts Search
Reply
 
Thread Tools Search this Thread Display Modes
Old 06-06-2023, 09:18 PM   #1
MFCDirt   MFCDirt is offline
 
Join Date: Jun 2023
Posts: 8
What is this?

I picked this up for my grandson. It's been in storage for over 3 years. I was told it was an 80cc. Looks a little small. It also looks like an enduro but might be straight-up dirt. It's an MFC (Motorized Fun Company) bike is all I know.

Any ideas what size (sits as high as his KTM 50) or year? I'm trying to figure out the oil/fuel ratio.

TIA!
Attached Thumbnails
Click image for larger version

Name:	20230606_161849.jpg
Views:	166
Size:	1.19 MB
ID:	29375  


 
Reply With Quote
Old 06-06-2023, 09:38 PM   #2
Fast_Freddy   Fast_Freddy is offline
 
Fast_Freddy's Avatar
 
Join Date: Nov 2022
Location: Pennsyltuckey
Posts: 311
20:1 should be safe.
__________________
22 Templar 250


 
Reply With Quote
Old 06-06-2023, 09:38 PM   #3
Bill Hilly   Bill Hilly is offline
 
Join Date: Feb 2021
Posts: 1,003
I just did a little Google search, and a I would say it's a 65 cc. The jug should have the displacement stamped on it. I figure it's the same as others little bikes in it's league, just a different name. Are you sure it's a 2 stroke? It may be semi automatic, or it may have a regular clutch. I hope it provides some fun for the youngen.


 
Reply With Quote
Old 06-06-2023, 09:49 PM   #4
MFCDirt   MFCDirt is offline
 
Join Date: Jun 2023
Posts: 8
It has 650CM3 stamped on the clutch/gearbox housing. It has gears but no manual clutch, so I'm guessing it's semi-auto. Not sure if it's 2 or 4 stroke. I was told it was a 2 stroke. I see no where to put in regular oil, just gear oil?

I have 3 grandsons and 3 bikes down. They are itching to go.


 
Reply With Quote
Old 06-06-2023, 11:06 PM   #5
Bill Hilly   Bill Hilly is offline
 
Join Date: Feb 2021
Posts: 1,003
Quote:
Originally Posted by MFCDirt View Post
It has 650CM3 stamped on the clutch/gearbox housing. It has gears but no manual clutch, so I'm guessing it's semi-auto. Not sure if it's 2 or 4 stroke. I was told it was a 2 stroke. I see no where to put in regular oil, just gear oil?

I have 3 grandsons and 3 bikes down. They are itching to go.
I would say it's a 2 stroke, and you premix the gas, and oil. I saw this on the internet, and it looks like a 2 stroke from the way the head is covered with fins, and it looks like the plug is in the center.
https://offerup.com/item/detail/665359194


 
Reply With Quote
Old 04-21-2024, 06:01 PM   #6
MFCDirt   MFCDirt is offline
 
Join Date: Jun 2023
Posts: 8
Quote:
Originally Posted by Bill Hilly View Post
It may be semi automatic, or it may have a regular clutch. I hope it provides some fun for the youngen.
Billy, it has no clutch. At least not one on the left-hand side of the handlebars.


 
Reply With Quote
Old 06-06-2023, 10:14 PM   #7
Bruces   Bruces is online now
 
Join Date: May 2018
Posts: 1,649
Those bikes were from 2004 or so if my memory is correct ,I know they were based off of Yamaha playbikes but I can’t remember what the model was unfortunately ,I think it’s possibly a PW 80 ? We have new members show up here from time to time always looking for parts or info ,but I can’t remember a single one actually posting they found what they were looking for .


 
Reply With Quote
Old 06-06-2023, 11:24 PM   #8
Bill Hilly   Bill Hilly is offline
 
Join Date: Feb 2021
Posts: 1,003
http://I see the engine oil fill in the picture you posted. It's at the top of the side case above the foot pad of the rear brake pedal. It's right at the stamping of "650cm3" that you mentioned.



Last edited by Bill Hilly; 06-06-2023 at 11:29 PM. Reason: Pic
 
Reply With Quote
Old 04-21-2024, 05:58 PM   #9
MFCDirt   MFCDirt is offline
 
Join Date: Jun 2023
Posts: 8
It's been a while since I last posted. Could not get it to run so it got stored for the winter. It has spark and starts (and then stops) if I put fuel directly into the spark plug hole. The carb was taken apart and cleaned. Other than the holes in the bottom (clearly stored with some fuel), it looked ok. I filled the holes with JB-Weld. It did not work, it started flaking in the bowl. I'm thinking the carb needs to be replaced. What's the best way to find a carb for this "thing"?



Last edited by MFCDirt; 04-21-2024 at 06:33 PM.
 
Reply With Quote
Old 04-21-2024, 11:14 PM   #10
david3921   david3921 is offline
 
Join Date: Feb 2009
Location: Michigan
Posts: 1,043
Quote:
Originally Posted by MFCDirt View Post
It's been a while since I last posted. Could not get it to run so it got stored for the winter. It has spark and starts (and then stops) if I put fuel directly into the spark plug hole. The carb was taken apart and cleaned. Other than the holes in the bottom (clearly stored with some fuel), it looked ok. I filled the holes with JB-Weld. It did not work, it started flaking in the bowl. I'm thinking the carb needs to be replaced. What's the best way to find a carb for this "thing"?
Pull the carb and measure the throat in mm. This will show the size you need. Search on Amazon for the size. These small motors usually have a PZ19 or 20 carb. Might be smaller. BTW, if it wasn't clear by the earlier posts, it's not a two stroke. The 650ml is the amount of oil the crankcase holds.
__________________
2012 Kawasaki Versys
1984 Honda Magna V65
2016 Rhino 250
2016 Tao Tao 125D


 
Reply With Quote
Old 04-21-2024, 11:58 PM   #11
Bruces   Bruces is online now
 
Join Date: May 2018
Posts: 1,649
Post #6 above looks like exactly the same bike ,and that bike is definitely a two stroke .


 
Reply With Quote
Old 04-22-2024, 11:49 PM   #12
david3921   david3921 is offline
 
Join Date: Feb 2009
Location: Michigan
Posts: 1,043
Quote:
Originally Posted by Bruces View Post
Post #6 above looks like exactly the same bike ,and that bike is definitely a two stroke .
...and this is how we learn. Or at least how I learn. Thanks for the knowledge. Now for more learning; is there an oil tank or is it pre-mix?
__________________
2012 Kawasaki Versys
1984 Honda Magna V65
2016 Rhino 250
2016 Tao Tao 125D


 
Reply With Quote
Old 04-22-2024, 12:00 AM   #13
Bruces   Bruces is online now
 
Join Date: May 2018
Posts: 1,649
Remove the carb and look for letters and numbers identifying the carb and search those numbers for a suitable replacement .


 
Reply With Quote
Old 04-22-2024, 01:21 AM   #14
krat   krat is offline
 
Join Date: Nov 2019
Location: KY
Posts: 277
Think this through fellows;

Are there valves? Is there a valve cover? Is the plug going into the center of the head?

No valves or valve cover with plug into the center of the head is a 2 stroke!

Carb feeding the head = 4 stroke

Carb feeding the crankcase= 2 stroke.

The oil is for the semi-auto transmission and auto clutch.

For the carb just google "MFC65cc carb",, witness the selections and pick the one that looks like yours. Measuring will help but it is always a crap shoot on small chinese dirt bikes and any of several might work.
__________________
%90 of the Chinese motorbikes ever made are still on the road. The other %10 made it back home.


 
Reply With Quote
Old 04-22-2024, 01:13 PM   #15
MFCDirt   MFCDirt is offline
 
Join Date: Jun 2023
Posts: 8
It's interesting, when it tries to start, it does sound like a 4-stroke (deep guttural). However, it does make sense that it's a 2-stroke (carb feeding the crankcase, plug in the center of the head). I spent a few hours Sunday searching for carbs. Nothing with the carb numbers (TK TG03 53F11). My other issue is that the air intake is on the front. Most of the carbs I'm finding have that reversed, so I can't access the screws from the other side.

The carb intake is roughly 24mm on the inside. I say roughly because it tightens on if that makes sense.


 
Reply With Quote
Reply



Posting Rules
You may not post new threads
You may not 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

Forum Jump


All times are GMT -4. The time now is 07:39 PM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.