SmartCarb - SC2 - RIDE/REVIEW - 2019 Yamaha YZ250X - Ultimate 2-Stroke Single Track Dirt Bike Carb
Рет қаралды 13,378
Күн бұрынPART 2 of 2 -- Ride and Review -- UPDATE -- The idle speed in gear and out of gear is actually 1200-1500, I did a total bonehead move and accidentally reset the tachometer/hour meter to read 2 pulses per revolution, versus 1 per Revolution when I was resetting my transmission oil maintenance interval. I can't believe I did not catch that, SORRY ABOUT THE CONFUSION! Either way, it's idling great and doesn't stall out at low RPM, that was the point. Sorry everyone!
This video shows what the SmartCarb is like to ride in the rocky/loose Colorado single track after 10 hours of riding. See how the bike starts up, idles, crawls, and rips on the pipe. The power has gone from weird high-mid range surge with the Keihin carburetor to a very nice smooth power delivery (as far as a two-stroke goes) with a nice low/mid hit that is very usable in the type of loose/rocky single track riding I do. This bike has the FMF Gnarly pipe, Turbine Core 2 and flywheel weight, so it is tuned for that type of power delivery but the top end and over-rev feels great too. I bet if you swapped the stock or Fatty pipe with a shorty silencer on there you could very easily get it tuned for a mid/top hit too for track days.
Note - In the video I said I have the clickers 3 leaner than where I got it, it's actually out 5 out now. I like being a little rich for more low end torque, but am playing with going a little leaner to increase the responsiveness. The bike runs great either way, so we are just talking about very very fine tuning for riding style.
Part 1 - Installation - • SmartCarb - SC2 - INST...
Part 2 - Ride and Review - You're watching it
Overall impression is just how great and clean the bike runs at both 5000 and 10000 feet. Just get the clickers dialed to your desired fuel/air ratio (it comes rich out of the box) and your riding style then forget it.
A+ product! Great work Technology Elevated guys!
technologyelevated.com/
-Video Contents-
00:00 - Start
00:38 - Start up
00:50 - Low speed performance
03:05 - Low speed climb/crawl
03:50 - Super low RPM crawl
05:41 - On The Pipe/High RPM
07:30 - In-Depth Review
07:55 - V-Force Reed Valve
08:10 - Clicker adjustments
09:09 - Idling benefits
11:50 - Thank You/Subscribe
To subscribe and follow the build and other dirt bike/adventure/enduro/truck videos, click here:
/ @sourceadv
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.
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...
For more about Source ADV, visit: SourceADV.com/
or Visit Source ADV Instagram: / sourceadv
Other Videos We Are In:
KTM 500EXC Vs. Sur Ron X
--www.youtube.com/watch?v=_KAuO...
@Dropsix 3 жыл бұрын
Wait, 600rpm? Mine is idling at 1400 rpm which is what the OEM setting typically is. Also, when it’s in gear the idle should be going up due to the neutral switch. I have a 2019 yz250x also along with a smart carb and I’m confused by your settings
@SourceADV 3 жыл бұрын
Do you have an hour meter/tachometer as well?
@Dropsix 3 жыл бұрын
SourceADV absolutely.
@SourceADV 3 жыл бұрын
@Dropsix Jesus, you are absolutely right! I had the Tach set to read 2 Pulses/1 Revolution which halved the idle RPM. I must have accidentally reset it last time I reset the oil change interval. I didn't really think about it until you just said that.... What a bonehead move. In reality it's idling right around 1400. Just changed the hour meter settings and tested it, spot on. Sorry man, thank you for catching that!
@SourceADV 3 жыл бұрын
Just pinned this comment to avoid confusion!
@Dropsix 3 жыл бұрын
SourceADV so it should be idling at 1400 or so in neutral and it should be going up a decent amount while in gear due to the idle switch. That would be regular operation.
@ericc90 3 жыл бұрын
Awesome review and really gave me some insight how good that combo- yz250x and smart carb is! Might have to copy you lol. Looking forward for future yz250x content
@SourceADV 3 жыл бұрын
It’s awesome! More videos coming soon!
@Sanguine_Addiction 2 жыл бұрын
Just installed a SmartCarb on my 2017 YZ250X and what a difference!! Definitely worth every penny.
@SourceADV 2 жыл бұрын
Agreed!! Bike runs mint everywhere. Enjoy!!
@drsaggypants1350 3 жыл бұрын
Awesome truck. I just got a 2020 yz250x and I absolutely love it.
@SourceADV 3 жыл бұрын
Heck yeah! Great bikes!
@joeshawley1626 3 жыл бұрын
Had this bike and loved it! I went with the lectron carb. That being said im going to give this carb a try on my new yz125x..
@SourceADV 3 жыл бұрын
Its great!
@pitbikecrazy125 3 жыл бұрын
Sold! Thanks for the great initial review and this follow up!!
@SourceADV 3 жыл бұрын
No prob! Just make sure you read the manual thoroughly, there are some counter intuitive elements around the tuning. Take care!
@SourceADV 3 жыл бұрын
Just don’t mess with the idle screw until you have your metering rod set
@bmwlane8834 2 жыл бұрын
Nice review and tutorial. Nice bike too! Might be putting this on my 300.
@SourceADV 2 жыл бұрын
It’s a great product and awesome simple tech!
@nickjohnson334 3 жыл бұрын
Have the same bike and love it. I also ride from +/- 5k to 10k and have the stock carb jetted a little lean for the lower altitude and runs pretty well for me. What weight flywheel did you put in and which size accerbis oversize tank did you install and how did fit? Thanks
@SourceADV 3 жыл бұрын
Nice! Me too, such a great bike. I have the smart carb dialed now and it’s awesome. I went with the the GYTR flywheel because it came with the bike, I think it’s plus 8 ounces. Feels great. The IMS tank is the 3.2. Fits pretty good, it puts a little more stress on the radiator shrouds and I had to use a heat gun to mold them a little bit. The twin petcocks and fuel line routing is a pain to setup but pretty easy once you have it finished. Hit me up at hello@ sourceadv.com and I’ll send you the latest pic of the fuel line routing. Cheers!
@jingelsby 2 жыл бұрын
Great video man..We thank you..Say, does the Smart Carb all but do away with the "Hanging idle" problems with the pwk38?
@SourceADV 2 жыл бұрын
Yup!
@MrBchanson 3 жыл бұрын
Nice compare man! Thanks for the video. What hand guards r u running as well?
@SourceADV 3 жыл бұрын
Thanks dude! Cycra Pro Bend with the BRP Mount to the handlebar clamp. Cheers!
@mikeb5 3 жыл бұрын
Have the same bike, my next purchase is definitely the smart carb. I bought a Cisco’s racing softer power valve spring and it was a great addition to my apex head.(does similar tuning the the power valve mod but further removes the that awful mid range hit and increases bottom end ) worth a try at only 40$ or so
@SourceADV 3 жыл бұрын
Nice! Sounds like a good mod. The smart carb smooths the bike out too, so make sure you talk to the team there with all your mods to get the settings right. Take care man!
@michaelschwab9563 2 жыл бұрын
Holy Shit this looks like such a fun place to ride! Those fast uphills are amazing
@SourceADV 2 жыл бұрын
Good ole southern Colorado! Great stuff there! Cheers!
@davec3927 2 жыл бұрын
Maybe i missed it, what premix oil and what ratio you running? by the way, great vid. very informative.
@SourceADV 2 жыл бұрын
Maxima K2 @ 40:1 for single track riding seemed to be a good fit
@Levergun66 Жыл бұрын
Thanks for your videos! I bought a 2022 YZ250X and considering the SC2. It appears from comments you sold yours awhile ago…but looking back did you ever experience any issues with the Smart Carb after making this vid and before you sold it? Also, why’d you decide to move on from the 250X? Thanks again for putting out great content!
@SourceADV Жыл бұрын
No problems once I got it leaned out enough it comes pretty rich from SC which is smart. I have heard of people who’s left the gas on and flooded the engine but I never had any issues. It worked great and ran the same no matter the elevation. I regret selling that bike, but I wanted to do the project with the KTM 500. Cheers
@Levergun66 Жыл бұрын
@@SourceADV Thanks!
@ildoc66 Жыл бұрын
Hey mate great clip, what set up do you use on your handlebar ?
@SourceADV Жыл бұрын
This one had the BRP rubber mounted handlebar clamp with the Scotts sub stabilizer. I run pro taper evo steering dampener low bars. On my new bike I don’t run a steering dampener, I just make sure the suspension is perfectly dialed and run an XCGear Mako360 for vibration absorption and impact absorption for the wrists. Cheers!
@jonsainsbury8726 Жыл бұрын
Apex head with SX insert is #1 mod... Jetting cleans up... Stock carb easy to jet for altitude with Apex jetting chart...
@SourceADV Жыл бұрын
In CO and AZ I would regularly go +/- 6000 feet, so the smartcarb made a lot more sense and the Smartcarb team does not recommend a high comp head.
@craigsteinman9807 3 жыл бұрын
Your bike sounds awesome.couldnt believe the lugging ability..I ride at tahuya national Forrest you can view the terrain in any you tube video just type tahuya national Forrest dirt bike ride. So I really know about hard pack with loose rock ..it's like riding on marbles over hard wood
@SourceADV 3 жыл бұрын
Exactly! Being able to use really low RPM is can be great for our stuff for sure when things go sideways and you need to crawl out! 170 miles of trail at Tahuya, sounds pretty awesome! Take care and enjoy the ride man!
@scralatchtica824 3 жыл бұрын
I noticed at the end of Part 1, you had the stock reeds and spacer installed and then in the begining of this video you had v-force reeds installed without the OEM spacer. SmartCarb recommends leaving the spacer in however they say if you are running a larger rear spring which it appears you have you can consider removal of it. Did you notice any difference, some people state leaving the spacer off removes some of the low end torque. What are you thoughts?
@SourceADV 3 жыл бұрын
Yeah. I put the spacer back on, it’s a very tiny difference. I am running a larger spring too. I like the more torquey feeling, but it’s not night in day, it’s a couple degrees.
@scralatchtica824 3 жыл бұрын
@@SourceADV How much does it rub on the shock spring? Just got mine installed going to ride tomorrow, looks like it definitely has contact because I'm 2 spring rates up from stock.
@SourceADV 3 жыл бұрын
It seems to be just a contact patch about 5-8 Mm and doesn’t seem to really deflect it enough to worry.
@theexisting1514 2 жыл бұрын
Did you use the spacer with the Vforce3 reeds? ordered up a SC2 making my check list lol
@SourceADV 2 жыл бұрын
I did end up leaving it on there, didn’t notice a big different either way though. Cheers!
@robertbaker9329 Жыл бұрын
Did you get the tps version? I have a 2023 yz250x and I’m not sure if I should get the tps version or not
@SourceADV Жыл бұрын
That’s right, I think you have to run it on the 250x to keep the ignition working well
@stoplogicmotorsports Жыл бұрын
I'm trying to enduro convert my 2007 YZ250, does this help tame the hit from the stock carb? I mainly ride in Texas but I'm not chasing huge elevation changes but more so fuel economy to reliably get 50 miles out of the stock tank while racing.
@SourceADV Жыл бұрын
Not sure. The yz250 is different from the X in the power valve and cdi
@stoplogicmotorsports Жыл бұрын
@@SourceADV I am actually currently running a X CDI on it, considering swapping power valve as well but I have it "close" to a 250X vs. the X I got to try the low end right now is... blubbery in tight single track and the mid to high still has a significant hit. I was told the SC2 has a more broad or linear range than the stock. Was it a significant change on your X?
@SourceADV Жыл бұрын
Ahh yeah, definitely helped with that!
@jfp1611 3 жыл бұрын
Try the apex head with xc dome and gytr flywheel
@SourceADV 3 жыл бұрын
She already has the GYTR flywheel on it in this video, which I absolutely love! Still snappy but will chug like a tractor when you need it. The SmartCarb guys told me with an RK Tech/Apex head they found the bike a little harder to tune and get into the sweet spot. Are you already running the APEX head? If you end up getting the smart carb and running the head I'd love to hear your thoughts. Cheers!
@glenngertz9429 3 жыл бұрын
Much performance and efficiency is yet to be seen by fixing the loose squish clearance on the stock OEM cylinder head. You can have your stock head machined or purchase a new aftermarket head that is suited for your elevation, fuel preference and riding style ( Enduro vs MX etc. ) I use Apex Technical Innovations head. Great company and affordable too. Best money you can spend on your bike. Mine is a 2019 yz250x
@SourceADV 3 жыл бұрын
I've heard good things as well Glenn about . The Smart Carb techs told me to stick with the stock head in this application so I followed their advice. Bike feels great performance wise, so I wont be doing anything else in that realm.
@glenngertz9429 3 жыл бұрын
@@SourceADV Sorry man , I can't agree with their advice. Not trying to be negative but anyone that says stay with a stock yz250x head does not know the bike . That's bad advice
@SourceADV 3 жыл бұрын
The exact word from the smart carb team was that the apex or RK tech heads make the metering rod carbs harder to tune and more “finicky”. If you search around on the forums a lot of folks will back that up with their stories. Before I put the Smart Carb on the YZ there was a very noticeable midrange lull that was exacerbated by large elevation changes. I was running a JD Jetting kit in the Stock carb. After going to the smart carb there was a major change in the powerband characteristics. From full chugging to amazing over rev, the bike just ran exponentially better at all rpm ranges and with 7000ft elevation changes.
@glenngertz9429 3 жыл бұрын
@@SourceADV sounds like you've got it perfect then. Safe riding, take care .
@SourceADV 3 жыл бұрын
@@glenngertz9429 thanks man! You too
@slayer6936 2 жыл бұрын
How do you like the steering stabilizer???
@SourceADV 2 жыл бұрын
Honestly, in really rocky areas like we have here in AZ it’s really nice because you can keep a much looser grip and not get as bad of arm pump without having the bars ripped out of your hands. Check out my latest 500XCF-w build I have the XCgear mako360 with the Scotts stabilizer and it’s like having total hand suspension lol. Cheers!
@vince5946 2 жыл бұрын
What metering rod do you have? AQ07?
@SourceADV 2 жыл бұрын
Yup, that’s the one
@LiquidForce142 3 жыл бұрын
What bar clamps are you running?
@SourceADV 3 жыл бұрын
Stock lower clamps in this video with BRP uppers
@luisquinta3137 Жыл бұрын
I, can you tell me what rod you use on smartcarb?
@SourceADV Жыл бұрын
I don’t know, sorry I sold this bike 1.5 years ago
@jfp1611 3 жыл бұрын
Did you click it out 3 clicks left or 3 clicks rights?
@SourceADV 3 жыл бұрын
Left/counter-clockwise/leaner if you are looking down on it from the top. It comes a little rich from factory. I actually ended up about 8 clicks leaner from the initial setting.
@jfp1611 2 жыл бұрын
Thanks buddy mine came super rich, it keeps flooding itself out
@SourceADV 2 жыл бұрын
Yeah, they do that air on the safe side. Hope you got it figured out!
@jeffgoetz7919 2 жыл бұрын
which metering rod are you using?
@SourceADV 2 жыл бұрын
Looks Like A-Q307
@jeffgoetz7919 2 жыл бұрын
@@SourceADV appreciate that
@SourceADV 2 жыл бұрын
No problem!! It’s whatever SmartCarb recommended
@malky525 3 жыл бұрын
With the sc2 it puts the yzx well over the price of a new xc 250 tpi in oz. Love Yamaha but for the $$$ thinking xc tpi. Enjoying your vids all the same. Thank you.
@SourceADV 3 жыл бұрын
The TPI is $10000. The YZ250x with smart carb is $8350. The suspension and simplicity of the YZ are very appealing to me too. The thing is you can find the YZ’s way cheaper used too, I got this bike with 1 hour on it for $5500 with half the extras that are on it. My total build cost on the bike including fully tuned suspension from Full Factory Offroad is $8600. On the KTM with the same mods I’d be around $13k. The KTMs are awesome bikes though I’m not trying to knock them, I just happened to find an amazing deal on this 250X and ran with it. And now it’s my favorite bike of all time, so I’m glad I did! They are definitely worth a look if you can live with the kick starter haha take care man!
@malky525 3 жыл бұрын
@@SourceADV Wow. In Australia the yzx is $12395 and xc $12595.
@SourceADV 3 жыл бұрын
No way! That’s crazy! What a difference, I guess the YZX is a bargain over here in the states
@ontheroad6868 3 жыл бұрын
Why Smart Carb over Lectron?
@SourceADV 3 жыл бұрын
I liked the sealed nature of it and the more advanced intake Venturi.
@COGSportsCards 3 жыл бұрын
Several reasons for us.....updated design from the 70's Lectron, cleaner install, choke on correct side, adjustable without removing from bike, stock throttle cable, maybe more. Not sure why you would not get newer and better design unless you really cant afford it. I would rather save up a little more money and get this than have to deal with any other carb.
@garykrygsman1391 3 жыл бұрын
Sweet build a Wr450f adventure bike 🙌🏼
@SourceADV 3 жыл бұрын
Dude! I’m with you. It would be really cool with the 2012-2015’s. They have tiny oil sumps though, which always freaks me out a little bit. That’s why the DRZ400 is a little more appealing. But the fuel injection on the WR is great too...
@garykrygsman1391 3 жыл бұрын
SourceADV the Drz400e is a great bike but the wr450f suspension must be way better🤔 I’ve been looking at Wr450f and 500exc now for so longe :/ love your 500exc build looks mint
@SourceADV 3 жыл бұрын
Thanks man! The plan was to have my buddy over at endurospec just redo the DRZ suspension. Motocross action raced a hopped up DRZ in expert motocross with just a revalve and it did just fine so I gotta think it will be plenty fine for adventure riding... but we shall see haha. I’m waiting for the prices to come back to normal on bikes then I will start this project. Cheers!
@garykrygsman1391 3 жыл бұрын
SourceADV great1 I can’t wait to see the build
@SourceADV 3 жыл бұрын
Thanks!
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