Table of Contents

YT Decoy Core 4 MX Review (2023)

YT Decoy Core 4 MX review

Table of Contents

YT isn’t necessarily the household name in the world of MTB and e-MTB. However, the manufacturer is making waves on the scene and taking on the big names, with some seriously well-crafted rides.


YT’s Decoy Core enduro range is aiming to sweep up the market, by offering lower prices than some of the heavy hitters in the industry, but without compromising on quality. The Decoy Core 4 is the highest spec bike in their enduro range.


So, does it tick the right enduro boxes or should you go for one of the tried and tested manufacturers, instead?

Our Verdict


This is a really solid bike from the crew at YT.


The Decoy Core 4 has undisputed moments of brilliance – its well-balanced suspension and wheel setup make the bike endlessly fun to tackle challenging terrain on.


The slightly aggressive, yet comfortable geometry, means you always feel at ease, but still poised to take on something gnarly.


However, we’re disappointed that YT chose to go for a Shimano EP8 motor and display – the motor is battery hungry and accurate range estimation is nigh on impossible.


You also get a smaller battery than some of the competitors out there (although this can be upgraded to a bigger battery).


An excellent effort from one of the smaller manufacturers out there, though.



YT Decoy Core 4 MX Review

YT Decoy Core 4 MX parts

Price: $7,600


YT Decoy Core 4 MX frame

This YT Decoy has a fully carbon frame, with a total bike weight of 21.7kg.


It comes in 5 sizes – small, medium, large, extra large and double XL – you don’t see many manufacturers offering a double XL option, so it’s an interesting approach from YT eMTB. The frame offers a solid ride experience, with very good shock absorption, useful for the style of aggressive riding you’re likely to be getting to grips with on this YT decoy.


On paper the bike doesn’t look like a showstopper, geometry-wise, with a head-tube angle of 65 degrees and a reach of under 450mm in the large frame size (which is the bike we reviewed). However, it actually has excellent handling and feels super-nimble out on the trails, with really great manoeuvrability.


It’s very responsive to ride, manipulating easily through tricky sections and you always feel very much in control. Overall it’s a very playful ride and you can throw it around easily – exactly what you want from an enduro bike.

ℹ️ Balanced overall, but a lighter rider might find the back end lifts a bit too much on tricky descending sections – shifting your weight backwards should compensate for that, but it’s something to bear in mind. You don’t want to be chewing roots.


This YT electric mountain bike has a 540Wh SMP YT custom battery. It isn’t the biggest out there, but it’s still a fair size for a bike of only 21.7kg – you can also upgrade to a 720Wh battery, but that doesn’t come as standard.


You can purchase the upgraded YT Decoy battery from the manufacturer’s website and it’s easily switchable for the 540Wh standard battery.


The battery doesn’t offer the greatest range we’ve ever seen, we found the bike ran out of juice very quickly if you hammered the Boost mode too liberally – after only around 1100m-1200m of climbing in Boost it was nearly done and dusted.


The battery and Shimano motor (which we’ll come to shortly) don’t have the most intelligent relationship and it can lead to the motor being very battery hungry. Certainly something to keep in mind when you’re out on the trails.


The battery is slotted neatly into the downtube and overall the bike has a very impressive-looking finish.

YT Decoy Core 4 MX battery


The YT Decoy Core 4 comes with a Shimano EP8 motor – that kicks out 85Nm of torque. The EP8 has three main modes of assist – Eco, Trail and Boost – as we’ve already mentioned, be very cautious of using the Boost mode too liberally.


Although incredibly powerful and useful to make lightwork of tricky climbing sections, it absolutely tanks the battery. In terms of power, the motor is excellent, it absolutely dances up any incline you put in its way and it’s certainly geared up for the gnarly enduro terrain you want to tackle on this YT Decoy e-bike.

Does the YT Decoy Have a Walk Mode?

The YT Decoy does indeed have a walk mode, which certainly helps on the trickiest sections if you can’t get up via pedal power.

YT Decoy Core 4 MX motor

The well-sized EP8 motor offers decent ground clearance, ideal for popping and hopping over obstacles in those tricky enduro environments. However, we’re really disappointed with the amount of noise the battery emits – very noisy indeed and off-putting. The motor on the YT Decoy Core 4 certainly has flaws.

Motor Display

For those who’ve read our other e-MTB reviews, you’ll know full well we’re not the biggest fans of the display on the Shimano EP8 motor, and that’s absolutely no different here.


It’s a flipping nightmare and a huge oversight, spoiling the ride experience and in turn taking away from some of the bike’s other excellent qualities.


The range estimation is poor – the amount of battery you have left is displayed as 5 LED lights, which represent 20% of charge – which isn’t helpful at all.


You never quite know how much battery you have left and coupled with the battery hungry motor, you end up running out unexpectedly. It really leaves you in the lurch and is something that Shimano needs to address pronto.


Unfortunately, the motor and display actually detract from an otherwise decent bike and we think it’s a poor choice from YT.

YT Decoy Core 4 MX motor display


YT Decoy Core 4 MX shock
YT Decoy Core 4 MX front fork

This YT Decoy e-bike is a big travel e-MTB. The YT Decoy 4 has 170mm of travel at the front end and 165mm of travel at the rear.


It comes with FOX 38 Float Factory forks and FOX Float X2 Factory shocks – a reliable suspension set-up, which is made for some big drops and aggressive riding.


The bike feels well-supported for all sorts of obstacles you throw at it, and it feels nimble and smooth with the way it soaks up pressure.


It’s a balanced suspension setup which oozes versatility; comfortable both up and downhill, but not too spongy on the flats. It’s a trustworthy partner for all the challenges you throw at it.


A real winner in the suspension department!


The YT Decoy Core 4 comes with a mullet setup, which means you have a 29in wheel at the front and a 27.5incher at the rear. That allows the bike to feel balanced on the trail, but playful and nimble at the rear end, which helps with twisting and weaving through technical sections.


When you have that mullet setup combined with the aggressive suspension, you end up with a very fun bike to ride. The rims are supplied by Crankbrothers, with the manufacturer’s Synthesis aluminium E-MTB 19s offering a sturdy level of support, which can take the big hits the bike will face.


They’re wrapped in a Maxxis Assegai tyre at the front and a Maxxis Minion DHR II at the rear – these offer a strong toothy bite, which offer you lots of confidence when moving at pace into corners and needing to switch direction sharply. They’re absolutely the right accompaniment to suit this fun and playful e-MTB.


YT Decoy Core 4 MX disk brake
YT Decoy Core 4 MX brake

The YT Decoy Core 4 is fitted with SRAM Code RSC brakes. These are top range SRAM components, which are seriously reliable and offer immense stopping power out on the trail.

It’s the perfect brake for an aggressive and versatile e-MTB.


YT Decoy Core 4 MX drivetrain

The Powerfly 7 Equipped comes with a 12-speed SLX M7100 group set. They offer smooth shifting and an ease of use, which you need when spending hours up top on the pedals. The pairing does everything you need them to.

Price: $7,600

The pricing of this YT e-bike seems fair. It’s around average for this sort of e-MTB bike on the market and you’re some excellent components in there.

YT Decoy Core 4 MX Review Facts & Figures

Size Configurations

rider height
S154 cm – 165 cm
5'1″ – 5'5″
M163 cm – 173 cm
5'4″ – 5'8″
L172 cm – 182 cm
5'7″ – 5'11.5″
XL181 cm – 191 cm
5'11” – 6'3″
XXL190cm – 200cm
6'2.5″ – 6'7″

This size table is only a suggestion. The optimal frame size depends also on your personal riding style.

TOPTUBE569 mm591 mm612 mm635 mm658 mm
REACH409 mm429 mm449 mm469 mm489 mm
STACK624 mm629 mm633 mm643 mm652 mm
SEATTUBE400 mm420 mm445 mm470 mm495 mm
CHAINSTAY442.0 mm442.0 mm442.0 mm442.0 mm442.0 mm
HEADTUBE ANGLE64.5° / 65°64.5° / 65°64.5° / 65°64.5° / 65°64.5° / 65°
SEATTUBE ANGLE (EFF)75.5° / 76°75.5° / 76°75.5° / 76°75.5° / 76°75.5° / 76°
BB DROPF32/R16 mm/
F24/R8 mm
F32/R16 mm/
F24/R8 mm
F32/R16 mm/
F24/R8 mm
F32/R16 mm/
F24/R8 mm
F32/R16 mm/
F24/R8 mm
WHEELBASE1191 mm1213 mm1235 mm1259 mm1284 mm
HEADTUBE95 mm100 mm105 mm115 mm125 mm
BB HEIGHT344 / 352 mm344 / 352 mm344 / 352 mm344 / 352 mm344 / 352 mm
STANDOVER HEIGHT752 mm738 mm724 mm714 mm702 mm

Full Specs

COLORArctic Blue, Black Magic, Matte Black Magic, Trooper White
Front: Aluminum Rim 29“ | Inner Width 31.5 mm | Front Hub 110 x 15 mm |
Rear: Aluminum Rim 29“ | Inner Width 31.5 mm | Rear Hub 148 x 12 mm |
Freehub I9 1/1 Microspline
Front: Tire Size 29“ x 2.5 WT | EXO Casing | 3C MaxxTerra Compound |
Tubeless Ready

Rear: Tire Size 29“ x 2.5 WT | EXO+ Casing | 3C MaxxTerra
Compound | Tubeless Ready
29“ | 150 mm Travel | 110 x 15 mm Axle | 51mm OffsetGrip2 Damper, Adjustable
High- and Low-Speed Compression and Rebound, Air Pressure, Kashima Coating
Shock Length: 230 mm | Shock Stroke: 60 mm ≙ 145 mm Travel 3-pos lever,
Low-Speed Compression, Low-Speed Rebound, Air Pressure, Kashima Coating
M8150 | Crank Arm Length 165 mm | HOLLOWTEC
M8100 | 10-51T | 12-speed I Hyperglide+
M8100 | Shadow Plus | 12-fach
Monochrome I 35 m
M8100 | 12-speed I 2-Way-Release
Torque 85 NM | Power 250 W I E-TUBE PROJECT APP
Removable | 540 Wh Capacity | 36 V
Block Lock I High Cap I 2 Spacer 5 mm I Flatcapset
Length 50 mm | 35 mm Clamp | Rise +/-6°
Rise 30 mm | Width 800 mm | 7° Back Sweep | 5° Up Sweep
Lock On
Rotor CENTERLINE Ø front 200 mm / rear 200 mm Adjustable Bite Point and Reach
Trooper White & Black Magic: Ø 31.6 mm | 125 mm Drop (Frame Size S) |
150 mm Drop (Frame Size M) | 170 mm Drop (Frame Size L-XXL) | MMX-Remote

Arctic Blue & Matte Black Magic: Ø 31.6 mm | 125 mm Drop
(Frame Size S) | 150 mm Drop (Frame Size M) | 170 mm Drop (Frame Size LXXL)
| MMX-Remote
YT Custom | Width 140 mm I Lux-Alloy Rail
2 Bolt | 34-38T | Compact Slider
WEIGHT21.80 KG / 48.06 LB
Average weight for smallest size available, without tubes, pedals, and bottle.

How Does it Compare?

Let’s compare the YT Decoy 4 to one of the big hitters in the market – the Specialized Turbo Kenevo Expert – another e-MTB geared up for aggressive train riding.

Specialized Turbo Kenevo Expert

The Kenevo Expert comes with a larger 700Wh custom battery as standard and a larger custom motor, capable of kicking out 90Nm of torque (5Nm larger than our YT Decoy).


That comes at a weight compromise though and the Kenevo comes in 2.2kg heavier. You get a monster 180mm of travel though on the Kenevo Expert, at both the front and rear, more than our YT Decoy Core 4 – which makes it a win in the big hit department.


However, the Kenevo Expert is more descent focused and feels far spongier on the flat sections and uphill. You get similar SRAM brakes and an exceptional SRAM X01 Eagle group set on the Kenevo Expert – not too dissimilar to our Shimano.


There’s a serious win for the Specialized bike in the price department – it’s currently heavily discounted at only $5,799 on the official website. Both good bikes, but the Kenevo Expert shaves it for us – particularly if you want to take on the seriously challenging downhill trails.


However, on the flat and up hills the YT Decoy sneaks it. The Kenevo Expert’s price really does make it alluring though and it avoids the pitfalls of the EP8 motor.

Final Thoughts

The YT Decoy Core 4 is a seriously decent head turner from a less well-known manufacturer than some of the big names.


It offers a playful ride experience and feels both versatile and well-balanced – capable of taking on some very aggressive descent orientated trails, but also nimble going uphill.


The layout opens it up to some challenging terrain, without taking away too much from comfort and you have some excellent components in there, such as the suspension and the brakes.


However, we think the bike is let down somewhat in the motor and display departments – we simply don’t like the EP8 and it detracts from an otherwise excellent e-MTB.


A shame, really, but hopefully YT takes note for future incarnations of the bike. An undeniably solid effort from the company, though. Now, get out there and get a taste of the YT Decoy Core 4 for yourselves.

If you enjoyed this review then make sure to check out our other YT e-MTB reviews: