Go Back   DIY Go Kart Forum > Building Plans And Advice > Mini Bikes, Trikes, and Choppers

Notices

Closed Thread
 
Thread Tools Display Modes
  #41  
Old 04-20-2014, 12:19 PM
DaiSan76's Avatar
DaiSan76 DaiSan76 is offline
Senior Member
 
Join Date: Jul 2011
Location: Nixa, MO
Posts: 734
Thanks: 32
Thanked 102 Times in 83 Posts
Default

I went from a .86 to a .95, and it went from being too lean to being at little too rich, and it cut out at high rpm. I changed from the crappy chinese plug to an NGK, and now it runs like a champ.
__________________
http://www.diygokarts.com/vb/showthread.php?t=12557
http://www.davisphotodesign.com/
  #42  
Old 04-20-2014, 01:11 PM
88nightrider's Avatar
88nightrider 88nightrider is offline
Senior Member
 
Join Date: Mar 2014
Location: Norway, Sandnessjoen
Posts: 130
Thanks: 27
Thanked 15 Times in 13 Posts
Default

Quote:
Originally Posted by DaiSan76 View Post
I changed from the crappy chinese plug to an NGK, and now it runs like a champ.
Aside from getting a better brand plug (like NGK), I would also recommend (especially to the smaller two stroke engines) to get a long reach spark plug.

Stock type:


Long reach:
  #43  
Old 04-20-2014, 05:25 PM
DaiSan76's Avatar
DaiSan76 DaiSan76 is offline
Senior Member
 
Join Date: Jul 2011
Location: Nixa, MO
Posts: 734
Thanks: 32
Thanked 102 Times in 83 Posts
Default

What I bought looks longer than that. After it got it good and warmed up, and took the throttle limiter out, it seems like it is back to lean on the top end again. I don't know if Fabroman is enjoying this semi-related banter in his thread or not. I do have my own thread on this machine in Off Topic fun.
__________________
http://www.diygokarts.com/vb/showthread.php?t=12557
http://www.davisphotodesign.com/
  #44  
Old 04-20-2014, 05:38 PM
88nightrider's Avatar
88nightrider 88nightrider is offline
Senior Member
 
Join Date: Mar 2014
Location: Norway, Sandnessjoen
Posts: 130
Thanks: 27
Thanked 15 Times in 13 Posts
Default

Quote:
Originally Posted by DaiSan76 View Post
What I bought looks longer than that
One question: Are you talking about the threaded part being longer?

Edit:
Anyways, the quad you got, and the pocketbike probably have about 75cc of difference in engine size.
Your's being a 4 stroke, while this is a 2 stroke.
In other words quite different engines
  #45  
Old 04-20-2014, 09:44 PM
DaiSan76's Avatar
DaiSan76 DaiSan76 is offline
Senior Member
 
Join Date: Jul 2011
Location: Nixa, MO
Posts: 734
Thanks: 32
Thanked 102 Times in 83 Posts
Default

Quote:
Originally Posted by 88nightrider View Post
One question: Are you talking about the threaded part being longer?

Edit:
Anyways, the quad you got, and the pocketbike probably have about 75cc of difference in engine size.
Your's being a 4 stroke, while this is a 2 stroke.
In other words quite different engines
He also has a 110cc quad, which is a 4 stroke, virtually the same motor, and also being discussed in this thread.
__________________
http://www.diygokarts.com/vb/showthread.php?t=12557
http://www.davisphotodesign.com/
  #46  
Old 04-21-2014, 07:48 PM
OzFab's Avatar
OzFab OzFab is offline
Senior Member
 
Join Date: Nov 2011
Location: Warwick Qld, Australia
Posts: 15,619
Thanks: 1,135
Thanked 3,399 Times in 2,676 Posts
Default

Quote:
Originally Posted by DaiSan76 View Post
I don't know if Fabroman is enjoying this semi-related banter in his thread or not.
It's all good & relavent info so, please continue...

I haven't had time to do anything with the pocketbike but, the weird thing is, it was fine a week ago...
__________________
2013 Build-off Winner - http://www.diygokarts.com/vb/showthread.php?t=21076
  #47  
Old 04-21-2014, 07:57 PM
88nightrider's Avatar
88nightrider 88nightrider is offline
Senior Member
 
Join Date: Mar 2014
Location: Norway, Sandnessjoen
Posts: 130
Thanks: 27
Thanked 15 Times in 13 Posts
Default

Quote:
Originally Posted by Fabroman View Post
the weird thing is, it was fine a week ago...
Was the fuel tank on the pb used much before you got it?
  #48  
Old 04-23-2014, 07:12 PM
OzFab's Avatar
OzFab OzFab is offline
Senior Member
 
Join Date: Nov 2011
Location: Warwick Qld, Australia
Posts: 15,619
Thanks: 1,135
Thanked 3,399 Times in 2,676 Posts
Default

I have no idea but, I made sure I cleaned it thoroughly & fitted a new fuel line & filter. I need to get a new tank because this one only has a makeshift cap; it works but, it doesn't look great...

Why do you ask?
__________________
2013 Build-off Winner - http://www.diygokarts.com/vb/showthread.php?t=21076
  #49  
Old 04-23-2014, 08:24 PM
88nightrider's Avatar
88nightrider 88nightrider is offline
Senior Member
 
Join Date: Mar 2014
Location: Norway, Sandnessjoen
Posts: 130
Thanks: 27
Thanked 15 Times in 13 Posts
Default

Quote:
Originally Posted by Fabroman View Post
I have no idea but, I made sure I cleaned it thoroughly & fitted a new fuel line & filter. I need to get a new tank because this one only has a makeshift cap; it works but, it doesn't look great...

Why do you ask?
When the fuel tanks are new they are known to have plastic shavings in them that can clog up the carb.

Regarding the makeshift fuel cap. Have you tried to run the bike without it?
If the cap is not letting in enought air you end up with an vaccum when the engine is running.

Just a thought
The Following User Says Thank You to 88nightrider For This Useful Post:
OzFab (04-23-2014)
  #50  
Old 04-23-2014, 11:22 PM
OzFab's Avatar
OzFab OzFab is offline
Senior Member
 
Join Date: Nov 2011
Location: Warwick Qld, Australia
Posts: 15,619
Thanks: 1,135
Thanked 3,399 Times in 2,676 Posts
Default

Quote:
Originally Posted by 88nightrider View Post
Regarding the makeshift fuel cap. Have you tried to run the bike without it?
If the cap is not letting in enought air you end up with an vaccum when the engine is running.

Just a thought
A very good one, I never even considered that...
__________________
2013 Build-off Winner - http://www.diygokarts.com/vb/showthread.php?t=21076
  #51  
Old 04-24-2014, 09:37 AM
88nightrider's Avatar
88nightrider 88nightrider is offline
Senior Member
 
Join Date: Mar 2014
Location: Norway, Sandnessjoen
Posts: 130
Thanks: 27
Thanked 15 Times in 13 Posts
Default

Quote:
Originally Posted by Fabroman View Post
A very good one, I never even considered that...
Quite common on these pocketbikes. Especially when modding them. I had to drill larger went holes in my fuel cap. More power and RPM's equals more fuel and air to enter the engine. So more air must come in through the fuel tank vent to not generate a vaccum that would starve the engien of fuel
  #52  
Old 04-26-2014, 09:06 PM
DaiSan76's Avatar
DaiSan76 DaiSan76 is offline
Senior Member
 
Join Date: Jul 2011
Location: Nixa, MO
Posts: 734
Thanks: 32
Thanked 102 Times in 83 Posts
Default

Do you know which carb you have on your quad Fabroman? I have a pz20, and I can't get the thing to run well both on the high and low end. Maybe it's just because I suck at Tuning carbs.
__________________
http://www.diygokarts.com/vb/showthread.php?t=12557
http://www.davisphotodesign.com/
  #53  
Old 04-27-2014, 08:15 PM
OzFab's Avatar
OzFab OzFab is offline
Senior Member
 
Join Date: Nov 2011
Location: Warwick Qld, Australia
Posts: 15,619
Thanks: 1,135
Thanked 3,399 Times in 2,676 Posts
Default

No idea, I'll check it out & get back to you...

In the meantime...

__________________
2013 Build-off Winner - http://www.diygokarts.com/vb/showthread.php?t=21076
Closed Thread

Thread Tools
Display Modes

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



All times are GMT -6. The time now is 07:52 AM.