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| Motorized Bicycle Trouble Shooting Use this area to post problems that may arise that you could use some help in figuring out what is wrong with their bicycle motor and what needs to be done to achieve top performance. |
Where is the mixture screw?
Discussion at Motorized Bicycle Engine Kit Forum in the Motorized Bicycle Trouble Shooting forum. I probably have read a good hand full of instruction manuals on how to operate, maintain, and install the engine. ...  | | 
07-22-2008, 11:01 PM
| | Motorized Bicycle Newbie | | Join Date: Jul 2008
Posts: 6
| |  Where is the mixture screw?
I probably have read a good hand full of instruction manuals on how to operate, maintain, and install the engine. Almost on all of the manuals they tell us to :
After every 5 hours of operation check the adjustment of the mixture screw by rotating screw clockwise until seated and
then rotate screw 4˝ turns back counterclockwise.
So where is this mixture screw they talk about? More or less is there any page out there that could provide more information on the carburetor?
Also does anyone have the good tips on tuning the bikes engine for best performance and longevity?
Thanks
Angel |
07-22-2008, 11:32 PM
|  | MB Builder Extraordinaire | | Join Date: Jul 2008 Location: coventry, RI
Posts: 467
| | Re: Where is the mixture screw?
2-stroke? if its a basic chinese 'happy-time' motor...there is no such thing. the only screw is for idle.
4-stroke? what kind of motor you have? |
07-23-2008, 07:39 AM
|  | Godfather of Motorized Bicycles | | Join Date: Jan 2008 Location: Ashtabula county, Ohio
Posts: 7,957
| | Re: Where is the mixture screw?
__________________
If it ain't broke, and you mess with it long enough, it will be.
Last edited by Bikeguy Joe : 07-23-2008 at 07:41 AM.
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07-23-2008, 07:46 AM
|  | Moderator | | Join Date: Jan 2008 Location: Pampa, Texas
Posts: 1,844
| | Re: Where is the mixture screw?
Welcome to the forum. Some pictures of your bike would help. Especially pics of the carb. Glad you joined us..........................
__________________ There are only 10 kinds of people in this world. Those that understand binary and those that don't............
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07-23-2008, 08:47 AM
| | Motorized Bicycle Elite Member | | Join Date: Feb 2008
Posts: 463
| | Re: Where is the mixture screw?
The 4 strokes have a mix screw. The 2 strokes do not. Typically... Enjoy the ride.. |
07-23-2008, 11:46 AM
| | Motorized Bicycle Newbie | | Join Date: Jul 2008
Posts: 6
| | Re: Where is the mixture screw?
The mixture screw was mentioned on my 2 cycle engine installation guide, so that's why i was wondering if it would apply to a 2 cycle engine. So if the mixture screw doesn't apply for 2 cycle engines, why would they publish it? |
07-23-2008, 12:15 PM
|  | Moderator | | Join Date: Mar 2008 Location: Cuk Ṣon, AZ
Posts: 5,824
| | Re: Where is the mixture screw?
Welcome to the forum, there are a few who call it a mixture screw...who knows why  |
07-23-2008, 12:48 PM
| | Motorized Bicycle Elite Member | | Join Date: Feb 2008
Posts: 463
| | Re: Where is the mixture screw?
Well..That does depend on the type of 2 stroke. What kind of 2 stroke motor do you have? Let us know. Thanks. |
07-23-2008, 01:05 PM
| | Motorized Bicycle Elite Member | | Join Date: Jun 2008
Posts: 139
| | Re: Where is the mixture screw?
I think some of the Wizzer carbs Have a mixure screw Dave Is going to get me one when i'm ready and have evrything else fixed up. |
07-23-2008, 10:03 PM
|  | Motorized Bicycle Elite Member | | Join Date: Jan 2008 Location: Arizona Bullhead
Posts: 362
| | Re: Where is the mixture screw?
A rc carb and a higher quality 2 stroke engine will have the mixture adjustment screws.
A happy time carb has a NEEDLE with a taper.
Look up Normans posts on carbs. | | Thread Tools | | | | Display Modes |  Linear Mode | 
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