Select Your Ride

1
2
3

DYNOJET Jet Kit - Yamaha R1 4165

Part Number: DJ4165
DYNOJET
(No reviews yet) Write a Review
SKU:
DJ4165
UPC:
840094317369
MPN:
4165
Condition:
New
Availability:
Ships Same Business Day
Weight:
0.40 LBS
$155.63

Ships from Manufacture | Call to Order (231) 767-5055

Prop 65 Warning Prop 65 Warning cancer & reproductive harm Price Match Call for more info on price match does not include 3rd party ads

Description

Fuel mapping directly impacts power delivery and throttle response on your R1, and the DYNOJET Jet Kit 4165 lets you optimize jetting for your specific setup rather than relying on the manufacturer's one-size-fits-all calibration. Whether you're running stock filters or upgrading to a full exhaust system, this kit adapts to your modifications—delivering measurable gains in both peak power and mid-range usability. With fully adjustable needles and jets, you control exactly how your engine performs across the RPM band.

TECHNICAL SPECIFICATIONS

  • MPN: 4165
  • Application: Yamaha R1
  • Stage 1: 5% power increase
  • Stage 2: 8% power increase
  • Stage 3: 10-15% power increase
  • Stage 7: Race-only configuration
  • Fully adjustable needles, jets
  • Compatible stock/modified pipes
  • Compatible stock/modified filters
  • Improves power delivery
  • Improves driveability
  • Bolt-on installation
  • Street and track capable
View AllClose

Specs

UNITS:
KIT
PRODUCT NAME:
JET KIT
RIDING STYLE:
STREET
TYPE:
STAGE 1
MATERIAL:
BRASS
View AllClose

0 Reviews

View AllClose

Fitment

Fitment for DYNOJET Jet Kit - Yamaha R1 4165

View AllClose

FREE Shipping on orders of $99 or more!


Commercial Accounts

We offer tax-free commercial accounts, providing businesses with significant savings and streamlined benefits.



Easy 30-Day Returns

We proudly offer 30-day easy returns, ensuring a hassle-free and convenient shopping experience for our customers.


You May Also Like

Big Power, Nice Sound!

Picked up a Pro Circuit pipe and silencer for my YZ125 it’s a game changer. The power feels way better and the sound is awesome.

Tyler D. - 06/12

Perfect Fit

First time ordering here and dang y’all knocked it outta the park! The wheels fit my Ranger UTV perfect, and I’ll definitely be back for more 5 stars all day!

Sarah L. - 08/24

Fast Shipping!!

Ordered on a Monday, and it was on my doorstep by Wednesday! Super impressed with how fast the shipping was.

Jason P. - 09/13

Helps keep cool, works great!

Bought the dual pass Allstar radiator for my build, and it’s been solid. Keeps the engine running cool even on the hottest days no complaints here!

Jake M. - 05/21

SECURE & SAFE PAYMENT

EASY RETURNS

FAST DELIVERY

AUTHORIZED DEALER