Templar X 250 New Build OEM carburetor example of lean condition out of the box.
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- Опубліковано 18 лис 2022
- Templar X 250 New Build. Returned stock carburetor to default main jet and default idle jet from factory to profile behavior at my elevation. I had just drained the shipping oil in the engine and refilled the engine with motorcycle engine oil. This is the first run on motorcycle oil before checking the oil level for any change after flowing the oil throughout the crankcase and transmission.
I then spent a good seven to ten minutes going through 5k rpm on the digital dash and below varying up and down. Tossed in a few fistful of full throttles. And here’s what the running conditions were:
Temperature: 3.8C / 39F
Elevation: 182 m / 597 feet
If you want to test your carburetor jetting knowledge:
1. On some acceleration runs bogging.
2. One full fist of throttle single bog and quit.
3. On some de-acceleration, popping.
I found the idle screw and adjusted idle RPM. I did find the pilot adjustment screw hidden behind an aluminum welch plug. To remove this plug I selected a wood screw and drill bit and held the drill bit up to the light in front of the wood screw so that it was big enough to create a hole for the screw but let the twisted part of the screw bite into the aluminum. I carefully drilled a hole in the welch plug making sure not to stop before the drill reached the adjustment screw behind the welch plug. I then screwed in the wood screw, attached some vice grips and then using a small hammer tapped from behind the vice grips and the welch plug tapped out of the hole revealing the pilot adjustment screw.
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After this video was made, the following carburetor changes were done to address lean condition:
Pilot Jet:
Pilot Jet #40 removed.
Pilot Jet #42 installed.
Main Jet:
Main Jet #120 removed.
Main Jet #125 installed. (removed at 600 miles and replaced with factory #120 as a fine tuning adjustment after plug readings showed some carbon building up, I have a #122 jet on order to try later on)
Non Adjustable Needle:
Needle shimmed with ~1mm thick nitrile o-ring. (removed at 600 miles as a fine tuning adjustment after plug readings showed some carbon building up)
Aluminum plug hiding the Air Pilot adjustment screw was drilled, wood screw inserted and tapped out allowing pilot adjustments for optimum idle.
Templar X 250 Resources:
The ChinaRiders Forums Templar X 250 post thread:
www.chinariders.net/showthrea...
And, the ChinaRiders Forums Templar X 250 Resource Guide post thread:
chinariders.net/showthread.ph...
Go up on main jet for sure
Motocheez🤘
# 1 indicates main jet is too lean. #s 2 & 3 indicate pilot/slow jet is too lean and/or needle may need to be raised one notch. Popping on deceleration indicates a lean pilot jet for sure.
How do you check or change it? I'm new to bikes and learn from others who know, videos, and taking things apart?
My Templar keeps cutting off when I slow down
brother, do u mean out of the box as of that bike is brand new? if so where are u from i didnt know honda made xrs like that
Yes! Here in the USA we can order and have them delivered in the box. It is the same as a dealership would get. It is assembled with the front wheel removed and front forks bolted to the metal shipping frame. You just remove the front forks from the frame, put the front wheel on. Put the handlebars on. And you are done!
Link to jets please?
Links to any store page on Amazon or eBay or aliexpress will break in future and not help but just use the jet description to search any of those sellers and you’ll find a kit of them usually for $10 or less. The main and pilot jets seen in the carb are Keihin style jets. The carburetor that comes in the bike is a Youall PE28, 120 main jet, 40 pilot jet, 1.5 turns out on air fuel mixture screw which is hidden behind an aluminum Welch plug. The carb is fitted with blind break off bolts to satisfy the EPA that no one will modify the carb settings that got approved for importation into the country. I just cut slots in the blind bolt tops and used a screwdriver to remove. Replaced with hex socket cap screws from the metric box at Home Depot. If you do that and remove the Welch plug you have full access to tune and modify the carburetor and it’s plenty as it comes out of the box for the bike when you rejet if needed for your elevation above sea level and any readjustment to the air fuel mixture screw for optimum idle circuit for the final jetting you use at your given elevation. Original jets are 120 main, and 40 pilot.