SmartCarb - SC2 - INSTALLATION - 2019 Yamaha YZ250X - Ultimate Two Stroke Dirtbike Carb - PART 1
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- Опубліковано 20 сер 2024
- PART 1 of 2 -- Installation -- The SmartCarb 2 (SC2) from Technology Elevated is the ultimate two stroke dirt bike carburetor for jetless fuel delivery. Similar to the Lectron, the SmartCarb uses metering rod technology and a sealed/pressurized float bowl to compensate fuel delivery for varying air densities and barometric pressures. Basically it's almost like fuel injection in practice, but a lot simpler in design. From what we can tell, the SmartCarb's proprietary venturi and sealed system make it a superior design to the Lectron, especially for single track riding. It's almost impossible to stall this bike now (GYTR flywheel weight helped too), the off idle response is incredible. It's perfect for these rocky/rooty Colorado hill climbs and technical single track. The bike's top end woke up more too (as compared to the Keihin with FMF Gnarly and JD Jetting Kit) with substantially more over-rev.
Take a look at this video to get a full understanding of the installation process on a 2019 Yamaha YZ 250X (same for YZ250 minus the reed valve spacer) and what to be aware of that is specific to the Smart Carb. Check out video 2 to go for a ride and have a full review of the carb after about 15 hours of riding.
Part 1 - Installation - You're watching it
Part 2 - Ride and Review - • SmartCarb - SC2 - RIDE...
-Video Contents-
0:54 - Carb close up
1:27 - Adjustment clicker
1:45 - Venturi port
Teardown - 2:15
1:45 - Airboot trimming
4:08 - Electrical connections
4:32 - Side by side with Keihin
5:11 - Throttle cable install
7:23 - Carb install
8:54 - Subframe install
10:06 - Fuel line routing
13:25 - Fuel bowl priming
13:55 - Startup
14:47 - Initial thoughts
15:45 - Walk around
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This is part of a larger video series on the ultimate 2019 Yamaha YZ250X Single Track Build (for Tall Riders):
Setup + First Ride + Initial Review -- Exhaust, JD Jetting, Skid plate
---- • 2019 Yamaha YZ250X Set...
Fastway EVO 4 LOW POSITION Foot Peg Installation/Modification -- TALL RIDERS!
---- • Yamaha YZ250X / YZ250 ...
GYTR Weighted Flywheel
---- • Installing Dirt Bike F...
-Full Build-
-38MM SmartCarb
-Fastway Evo 4 Pegs (Modified to fit in low position)
-BRP/Scotts Rubber SUB mount bar mount + steering stabilizer
-Cycra Hand guards
-Tubliss Tire System front and rear
-Enduro tuned suspension by Full Factory Offroad
-FMF Gnarly/Turbine Core
-AXP Full Coverage Skidplate
-GYTR Weighted flywheel
This YZ250X is an awesome bike, feels crazy light and has great power. Can't wait to race it in the Rocky Mountain enduro circuit (when it re-opens).
---ADV Build Details/Other Videos -- 2017 KTM 500EXC-f -- Ultra Lightweight ADV Bike---
Nomad ADV Tower and Lighting *Coming soon*
Mosko Moto Reckless 40 // Stinger 22 Rackless Luggage
-- • Mosko Moto Reckless 40...
EnduroSpec Suspension
-- • KTM 500EXC Ultra Light...
IMS 4.5 Gallon Tank
-- • 2017-2019 KTM 500 EXC-...
FMF 4.1 RCT
-- • FMF 4.1 RCT Exhaust In...
JD Jetting Power Surge Fuel Tuner
-- • JD Jetting Power Surge...
Dirt Tricks gearing and chain
-- • KTM 500EXC Ultra Light...
Sicass Tail Tidy and hand guards
-- • INSTALL//REVIEW -- Sic...
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This is an excellent video! It's very informative and thorough and we'll be sure to send future YZ customers on over for installation tips. A couple things to add: The airboot/shock spring contact is very minimal and only occurs at full extension as mentioned. The contact will only shine the rubber up a little bit - it won't wear through or cause any trouble. Removing the reed spacer is an option, though we recommend trying to keep it on if possible. If you're running a larger diameter aftermarket shock spring, spacer removal may be necessary. The contact in this case could probably be eliminated by removing the two rubber nibs on the intake flange that clock the stock carb vertical. Having them on there with the SmartCarb can and does ever so slightly tilt the carb back. Removing the nibs will allow it to tilt a little bit more forward or toward the engine which can help eliminate both the boot/spring contact and also help with the cable routing next to the frame.
Awesome tips! I pinned your comment to the top so other viewers can see it!
@@SourceADV You will love the Sc2, I have a 36mm on my 125x and it's pretty much like putting EFI on the bike . So friggin awesome!! Check out the smartcarb FB page too, SmartCarb Equipped.
David Smirnov heck yeah! I’ve got over 20 hours of single track riding on it now, love it! Take care out there! Enjoy the ride!
Are you running the stock spring in this video?
Stock throttle slide spring?
Apex head kit drastically cleans up high altitude jetting...SX dome runs great...
Bike feels great with the smart carb, no other changes needed
Amazing video just got off the phone with technology elevated and they told me to watch your video
Awesome! Glad to hear those guys like the video, they are super helpful. Let us know if you have any questions!
Awesome vid! Very informative. I’m picking up a 2021 YZ250X this week and will be riding between 4500-10,000ft in New Mexico so this is very helpful in case I can’t get the stock carb to jet properly at my altitude ranges. Thanks!
Awesome! It would be great for that. What part of New Mexico? I go down to Taos and Santa Fe a bunch, love your state!
SourceADV I’m down in Las Cruces and will be riding down in the desert at 4500ft and up in Lincoln and Gila NF up to 9000-10,000ft. Looking forward to hitting northern NM and southern CO. Thanks for the info on the smart carb!
@@JohnSmith-dj5gf Awesome! Good Deal! Is Red River the only area that has dirtbike single track around Taos? I can't seem to find anything else?
SourceADV Good question, haven’t ridden Taos yet. Lincoln has the 30mi long rim trail which is good single track. Looking forward to exploring more.
@@JohnSmith-dj5gf Cool, I'll check that out. Take care!
Good video man. That was a tight fit on the hammer. Seemed to have plenty of room on the KTM/Husky bikes we have. SC2 are so smooth. Made a huge difference on our bikes that kame with Mikuni's.
For sure!!
Killer video!! Awesome explanation of things, clear picture and sound- this channel is gonna do good! Look forward to the update on this carb. I want one for the 19’ YZ250x I own :)
Thanks man! Take care!
How many clicks is your carb set to?
Sorry I don’t remember, I don’t have this bike anymore
If it's sealed, it seems pointless to turn your gas off..
Depends on how you have float level set and how far over the bike is leaning on the kickstand. With the These style of carbs the overflow can go into the engine through the jet... but you have to really really have it leaned over
Did you ever end up taking the reed spacer off for more clearance?
I did, didn’t change how the bike ran and added a little space
@@SourceADV could you share your settings on the carb? I got the same bike and stay in Boulder Colorado. Having a issue with the bike stalling and not kicking over. Just seeing what direction I need to go. Tylerpreston95@gmail.com is my email of you want to reach me there 🙏
Do you need a battery to run this carb? I see wire from the carb.. Yz250x doesn't have a battery by default
Nope! It’s just the throttle position sensor that adjusts the ignition mapping, which the stock carb has too. Hope that helps!
Looking at getting a smartcarb just a quick question. I’ve got a 2018 YZ250 non X version do I need to order it with the standard TPS sensor?
Not sure man, talk to the smart carb guys, they are really helpful
Can you send me A direct link to where you buy that carb
technologyelevated.com
Why not just flip the petcock around?
I don't thing the fuel line will make the bend into the smart carb. It comes straight out and up from the side of the carb, so having more line to make that bend as gradual as possible was my thought. I played around with a few 90 degree elbows off the carb too and it made it so the fuel line would rub on my boot, which was a hard no.
Hi! Greetings from Chile!
I installed SC2 in my 2016 250x, but I don't get good results: it uses a lot of fuel/mixture. I also smoke a lot.
I have talked a lot with the Smartcarb guys through mail, but I have not achieved anything.
Which may be?
Regards
They come very rich from the SC guys to protect your bike. Try leaning out the bike with the clicker.