Dyno Jet  Kit
INSTANT PERFORMANCE!
Dual taper needle with 3 precision main jets. Please specify stock (Stage I) or modified  (Stage II or Stage III )  bike when ordering, we will get you the correct jetting the first time!

Comes with complete instructions. This is an easy modification to obtain perfect carburetion. Whether you run a stock or modified YSR, a Dynojet Carburetor Jet Kit can provide you with a simple and affordable solution to your carburetion problems.
Dynojet Jet Kits increase power and smoothness throughout the entire rev range, while maintaining optimum fuel economy.
Includes comprehensive instructions.This is backed by free telephone and Internet support for Dynojet customers.

Stage I
Intended for YSRs with a stock engine using the stock airbox, air filter and stock pipe.
Stage 1 kits are designed to improve throttle response and driveability with
power increases of  5%.

Stage II
Intended for YSRs with a tuned engine using a well designed aftermarket
pipe with a Semi-modified airbox or a  replacement air filter. Power  increases of approximately 10% can be achieved.

Stage III
Intended for YSRs with a tuned engine using a well designed aftermarket
pipe with a modified airbox or a  replacement air filter. Power  increases of approximately 10% can be achieved.

Stage IV

Intended for YSRs with a tuned engine using a well designed aftermarket
pipe with a   replacement Clamp On air filter. Power  increases of approximately 14% can be achieved. This kit contains 4 main jets instead of 3.

(Dyno Jet main jets and needle are made specifically for the YSR. Do not be fooled by similar looking jets at your local shop, the jets that look similar are actually reverse flow 4 stroke main jets and DO NOT WORK in the 2 stroke YSR)