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| Norm's 2 stroke repair center Having problems with you 2 stroke motorized bicycke engine? Just ask Norm. he loves to tinker and troubleshoot engines. |
Carb Jets
Discussion at Motorized Bicycle Engine Kit Forum in the Norm's 2 stroke repair center forum. Is the jet # the dia of the jet hole? That is, #65 Jet has a hole of .65mm?
Jack...  | | 
07-02-2009, 02:23 PM
| | Motorized Bicycle Member | | Join Date: Apr 2009 Location: Boston suburb
Posts: 25
| |  Re: Carb Jets
Is the jet # the dia of the jet hole? That is, #65 Jet has a hole of .65mm?
Jack |
07-02-2009, 02:39 PM
|  | Motorized Bicycle Senior Member | | Join Date: Jun 2009 Location: Portugal
Posts: 59
| | Re: Carb Jets
Quote:
Originally Posted by zendiecut  Is the jet # the dia of the jet hole? That is, #65 Jet has a hole of .65mm?
Jack | Yup, i think that's it  |
07-02-2009, 02:45 PM
|  | Master Bike Builder & Forum Sponsor | | Join Date: Dec 2007 Location: Duvall, WA PNW
Posts: 2,674
| | Re: Carb Jets
Quote:
Originally Posted by zendiecut Is the jet # the dia of the jet hole? That is, #65 Jet has a hole of .65mm?
Jack |
Bingo! Exactry. |
07-02-2009, 11:27 PM
| | Motorized Bicycle Member | | Join Date: May 2009 Location: USA
Posts: 23
| | Re: Carb Jets
Some jets are a percentage of flow and some are in mm dia. We just pulled the Main Jet from Our China Doll and it was 70mm (It was actually a very loose 65 but not quite a #70)They sell jet drills but they are very expensive and not the same as the number drills you might buy. The best is to purchase jet reamers. The are tapered reamers that are easy to use and get accurate hole size. There not cheap but cost about 1/2 as much as the jet drills. Be sure you know how to reed the plug before you start jetting.
The slide cut away, the needle jet and needle position and the main jet can all be changed and all effect different throttle positions. Carb Jet Reamers Carb Jet Reamers
Last edited by vicsvw : 07-10-2009 at 03:35 PM.
Reason: Carb Jets in China Motors in MM
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07-02-2009, 11:30 PM
| | Motorized Bicycle Member | | Join Date: May 2009 Location: USA
Posts: 23
| | Re: Carb Jets
Hi I posted a long reply only to wipe it out. Vic |
07-02-2009, 11:45 PM
|  | Moderator | | Join Date: Mar 2008 Location: Cuk Ṣon, AZ
Posts: 4,620
| | Re: Carb Jets
vicsvw Welcome to the forum, glad you joined us.
You will need to make a few post and become a active member before you post any links or pis. Sorry about that but we do this to help fight spam.
Edit or repost your post but do not add links or pics until you get a few more post. |
07-03-2009, 10:22 PM
| | Motorized Bicycle Member | | Join Date: May 2009 Location: USA
Posts: 23
| | Re: Carb Jets
Just unpacked my China 66cc and found the Air filter was complently dry and mnual said nothing about oiling it. The foam filter will do little to no good unless it's oiled.
Life of the motor is clean air. Vic
Drills will not do the Job, you must have jet reamers -> Carb Jet Reamers
Last edited by vicsvw : 07-03-2009 at 10:25 PM.
Reason: Bold Lettering
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07-03-2009, 11:38 PM
|  | Motorized Bicycle Elite Member | | Join Date: Mar 2008 Location: Treasure Coast, Florida
Posts: 746
| | Re: Carb Jets
I wouldnt worry about the air filter being dry, it will oil up after a few miles of riding.
__________________
"No such thing as a stupid question, just a stupid answer"
48cc Grubee Starfire Round Head......
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07-15-2009, 09:46 PM
| | Motorized Bicycle Member | | Join Date: Apr 2009 Location: Boston suburb
Posts: 25
| | Re: Carb Jets
Anybody know what's up with the Dellorto Direct guys? I ordered jets over a week and a half ago. No word on shipping and they don't get back to you when you email. They have no phone number on their web site. Their customer service/relations suck!!
Someone have a phone number for them?
Jack |
07-15-2009, 10:02 PM
| | Master Bike Builder & Forum Sponsor | | Join Date: Dec 2007 Location: Duvall, WA PNW
Posts: 2,674
| | Re: Carb Jets
Did you get the email confirming your order? As I recall it had the phone #.
Other than that, I will agree they are VERY slow. | | Thread Tools | | | | Display Modes |  Linear Mode | 
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