The mods you have exceed stage 1 instructions, but if you're running good now, chances are in 23 years you already have one. Look for a stepped needle/circlip, you won't have that on an OEM needle. Dynojet Jet Kits suitable for a Honda CBR900RR-N Fireblade (1992)
Stage 1 Jet Kits
Intended for motorcycles with a stock engine using the stock airbox, air filter and stock exhaust pipe. Stage 1 kits are fully adjustable to allow the use of a well designed aftermarket exhaust pipe and stock replacement air filters like K&N. Stage 1 kits are designed to improve throttle response and driveability and in most cases power increases of approximately 5% throughout the entire power range can be achieved.
Stage 2 Jet Kits
Intended for motorcycles with a stock or mildly tuned engine
using a well designed aftermarket exhaust pipe with a modified airbox and a stock replacement air filter. Stage 2 kits are designed for applications where individual filters cannot be installed and for applications where airbox modification improves the engine's performance. In most cases power increases of approximately 8% can be achieved.
Stage 3 Jet Kits
Intended for motorcycles with stock or mildly tuned engines using a well designed aftermarket exhaust pipe and individual air filters. In most cases power increases of 10-15% can be achieved. However driveability may be compromised
particularly with short stroke, high rpm motors. On some modern engine and airbox designs, individual filters and proper jetting offer no performance improvement yet compromise driveability, in such cases stage 3 kits are not available.
Stage 7 Jet Kits
Each kit is assembled with full and comprehensive instructions, which show step-by-step installation. Designed for race use only or special applications. With the exception of our stage 7 V-MAX kit, all stage 7 kits are high RPM, race- track use only and are not suitable for street use.