For sale is my 2017 YT Jeffsy CF1 29", size Large in Snow White/Rawr color scheme(White/Black) It's an awesome bike in very good condition. All the maintenance had been done on time, or early. There were multiple upgrades installed. Please read description below. It is very capable bike, and I will miss it.
Since I do not have any seller feedback here, you can look on ebay(osaosek, 363 positive), or on, 75 positive),, 8 positive),, 100% positive) -
I've been selling/buying there for many years

I still have a original YT box, so shipping is possible at buyers expense. I'm locted in Willismburg, VA
If you are nervous about buying and shipping bike without seeing it in person, I am willing to take it to any bike shop of your choice in my area for checkup. But you have to schedule and pay for this service.

2017 YT Jeffsy CF1 29, size Large, 140/140 mm travel, still under remaining warranty, plus multiple components are still under warranty.
- Frame: Full carbon fiber, No damage, no scratches. Except one tiny paint chip on the top tube by the seat tube. It has clear protective tape(helicopter tape) on the chainstays, seatstays, downtube and seat tube
- Wheels: Both were professionally rebuild this summer, using some stock and some upgraded components. This was due to few broken spokes. They perform great, are reliable and not heavier than stock.
Front is stock e13 TRS rim, 28h, (30mm) with stock e13 TRS hub, Sapim triple butted spokes.
Rear is DTSwiss E511 rim, 28h, (30mm) with stock e13 hub(6 degree engagement), and Sapim triple butted spokes. Rear hub serviced(clean/lube) this past august, replaced the pawls, they were getting worn out.
Both wheels are tubeless with Orange Endurance sealant.
- Tires: Brand new E13 TRS single ply 29x2.35 tires. These have only one ride on them.
- Brakes: Sram guide RS, both levers were replaced this summer under warranty(front had infamous sticking lever issue, SRAM/YT determined that both levers were from effected batch, and proactively replaced both).
I replaced brake pads at the same time, and did the full bleed/service.
200mm front rotor, 180 rear rotor
- Drivetrain:
Sram PCX1 chain,
Upgrade: e13 TRS casette(Replaced under warranty this summer due to it developed play between two parts of a casette, one with two cogs, and the other one with 9 cogs. These have 5 year warranty)
Sram X1 derailleur, replaced in June 2019 under warranty, due to worn out clutch, I was hearing too much chain slap and Sram/YT replaced it for me.
Upgrade: OneUp chain guide installed.
RaceFace Turbine Cranks with RaceFace 32 tooth chainring
- Suspension:
RockShox Monarch RT3HV, stock, in perfect condition, air can service done in August
RockShox Pike RCT3 with DebonAir upgraded airspring installed at the end of 2018, full service done this spring(Including damper service and bleed), and lower leg service done in August(Same time as shock)
RaceFace aeffect 150mm dropper post
- Rider interface:
Pedals: No pedals come with the bike
Seat: WTB Volt Pro
Cockpit:Upgraded RaceFace NextR Carbon Fiber bar, 5 deg up, 8 deg back, 20 mm rise
Stem: RF Turbine, 60mm (according to specs)
RaceFace Turbine dropper remote
Sram X1 shifter.
Grips: Easton lock on, DMR Deathgrip featured on the pictures were slightly worn our, and getting uncomfortable, so I swapped them.
Two plastic fenders - included. Easy to remove if you don't like them, but they help to keep gunk out of the suspension pivots and out of rider's face.
Bike computer pictured: NOT incuded.
Main pivot bearings were replaced one ride ago. I discovered they were not smooth anymore, so they were replaced with Enduro MAX bearings. Rear suspension action is perfectly smooth again.
Bottom bracket was replaced at the end of august due to not being perfectly smooth. e13 BB92 installed($70 value)
Bike rides great, it is smooth, everything works as it should, and there are no issues that I know of. In the matter of fact, I was still riding it this past weekend. I rode it in the mountains, local parks, and even raced it once, for fun.
It did great doing all of the above. Riding around where I live (Richmon/Williamsburg VA), I could not have asked for anything better. Perfect amount of travel (even for trip to Pisgah, comfortable, confidence inspiring bike.
YT has great customer service, and I had nothing but very good experience with YT or other component manufactures. This is why I bough another YT bike and this one is for sale.
Feel free to ask any questions, as I might have missed something in the description.
I'm confident, that this bike will serve someone for many years with no issues.
Thanks for looking.

MTBR classified forum is annoying, I am havng hard time to post pictures. Look here: