Author Topic: What Carb and Carb Model Number to Use  (Read 5805 times)

RickieLee

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What Carb and Carb Model Number to Use
« on: January 17, 2012, 05:38:06 PM »
Hi All:
Am soooo confused on what carb to purchase. My second Oddy has no carb and I'm not sure the first Oddy has the original carb. What carb and carb model number should I purchase for the second Oddy? It has the stock fl250 motor which I am in the process of rebuilding.
No porting etc, just OEM type rebuild.
I think this is it but not sure :

1. http://wincycles.com/product_info.php?cPath=7_13&products_id=804
Honda ATC250R Carburetor 1986  $124.95 
Here is a new drop in direct replacement of original equipment, This Carburetor is a
direct manufactures replacements with OE Japanese kit, This Carburetor will not
need any additions or modifications
MAKE SERIES MODEL YEAR REPLACES OE ORDER #
HONDA ATC ATC250R 1986 16100-HB9-305 WIN157F
 ****or

2.http://www.servicehondapsn.com/eshopprod_cat_7718-6329_prodtree_183-282-211_product_1197760.DG_KEIHIN_OFFROAD_CARBURETOR_P.htm
DG KEIHIN OFFROAD CARBURETOR PJ SERIES OVAL VALVE 
   The oval slide enables the engine to respond much quicker than with a conventional round slide carburetor
Faster acceleration and improved performance
Chromed oval slide for excellent response
Throttle bores sized for more power and improved air flow at low and middle RPM
Easy to use enricher and speed control
Easy jetting with jetting parts available
Available pre-jetted for most popular makes and models
34mm
 12345678910  DG Keihin Offroad Carburetor PJ Series Oval Valve
42-9720  $209.95

Thanks in advance Guys!!!!






« Last Edit: January 17, 2012, 06:21:01 PM by RickieLee »

hoodlum

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Re: What Carb and Carb Model Number to Use
« Reply #1 on: January 17, 2012, 06:30:11 PM »
Option 1 should do fine....

RickieLee

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Re: What Carb and Carb Model Number to Use
« Reply #2 on: January 17, 2012, 06:44:29 PM »
Thanks Hoodlum!!

LiveWire

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Re: What Carb and Carb Model Number to Use
« Reply #3 on: January 18, 2012, 04:55:32 AM »
It is likely bigger than the original carb. I think that is a 34.

RickieLee

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Re: What Carb and Carb Model Number to Use
« Reply #4 on: January 18, 2012, 11:52:13 AM »
Thanks to both Hoodlum and Livewire!! The site for the carb lists the jets that come with this carb as:
Main jet:  145
Pilot jet:  42
Needle set:  S171.
This carb is the OEM replacement carb for the 2 cycle CB250R, close to my Oddy engine, correct?
However, I know the main jet in the OEM FL250 is a 120. So that brings up a question in my mind. 
Are jets specific to a carb or are they specific to an engine?? In other words do I now match the needles to
the original Oddy Specs or go with the carb needles. Yes I know I will have to go thru the tuning process
with idle/midrange/wot (and am really looking forward to learn that process) but am curious as to why the needles are so different;
 145 vs 120??
Thanks again guys.

LiveWire

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Re: What Carb and Carb Model Number to Use
« Reply #5 on: January 18, 2012, 12:31:08 PM »
The jets will vary by carb and by engine. No matter what you put on there, you will need to figure out the jetting. because of this, I don't think I would pay extra to get a carb meant to be a bolt on and go for another machine. I think the FL250 had a 28mm carb. The smallest any of my distributors stocks is 30mm. It's $75. You can buy a lot of jets for the $50 difference.

RickieLee

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Re: What Carb and Carb Model Number to Use
« Reply #6 on: January 18, 2012, 04:01:17 PM »
Will you provide link for the $75 carb you are referring to?

LiveWire

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Re: What Carb and Carb Model Number to Use
« Reply #7 on: January 19, 2012, 07:15:56 AM »
It is on a distributor site, that you don't have a log in for. I attached a picture.

needforspeed

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Re: What Carb and Carb Model Number to Use
« Reply #8 on: June 24, 2012, 06:54:22 AM »
will that carb fit directly on the stock fl 250 engine? same intake boot and airbox boot? I am in need of a carb and would like a direct replacement. The stock carb is unk and I already bought a replacement on ebay and it is unk as well.....any help would be great !!!!!!!

LiveWire

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Re: What Carb and Carb Model Number to Use
« Reply #9 on: June 25, 2012, 07:51:29 AM »
I would guess that it is a touch big based on my experience with the 30mm and the FL350R. I may be able to modify it like I do for the FL350 though: http://www.aftershockmotorsports.com/Honda-FL350R-Odyssey/Fuel-and-Air/Modified-32mm-Carburetor

I don't have a stock carburetor to get measurements off of. If you sent me your intake, I could make sure it would fit into it.