Filter Silencer

Best CR250 performance upgrades?

I want to get the most out of my 2002 CR250 and i already have a FMF silencer along with upgraded twin air dual stage air filter. What else can I do to the most out of the 250ccs. Reed valves and pipe are the the most obvious but I’m not sure what pipe to get or reed valves. Any suggestions from experience? Or anything else I can do to get more power?
P.S ..that is what the alphabit would look like if the letters Q and R were eliminated
P.S.S I’ve already jetted the sh*t out of it

I would let Mitch Payton’s folks over at Pro Circuit do the head and cylinder mods.
2 STROKE HEAD AND CYLINDER MODIFICATIONS $349.95
Includes the disassembly and cleaning of your cylinder. Exhaust valves (where applicable) are cleaned and inspected for damage. All airflow port passages are carefully inspected and modified for superior airflow. All porting specs are designed from computer programming and exhausting research and development in the field. Cylinder heads are modified to compliment the change in cylinder airflow. All cylinders must have a head modification to order to maximize cylinder porting benefits. Cylinders are reassembled and exhaust valves are timed. They will make it as fast as you want and can afford to go. This is just the first step. Personally I think money is better spent on suspension than engine work when it comes to MX bikes, but if you want horsepower these guys can hook you up.

http://procircuit.rideshop.com/catalog/motorwork.php

The CARB Verified CleanAIR PERMIT Diesel Particulate Filter

0.8″ Thread Dia Air Compressor Metal Filter Silencer $8.84

Seadoo 787 800 GSX GTX XP SPX GTI le RFI Throttle Body Housing Plate Base Filter $39.99

Solberg FS-231P-300 Filter/Silencer Inlet G2 $105.50

5 HP ROOTS DRESSER,BLOWER,VACUUM, UNUSED,MADE IN CHINA,SILENCER,AIR FILTER $2,250.00

2000 Yamaha GP760 gp 760 waverunner air intake silencer filter jetski $59.95

1 5/16″ Thread Inlet Air Compressor Metal Filter Muffler Silencer $25.22

NEW, 1/2″ AIR PNEUMATIC BREATHER VENT SILENCER MUFFLER FILTER VENT $0.99

Industrial Air Filter by Airflow Systems Inc. F70R PG3 Silencer $1,800.00

Yamaha 2000 2001 2002 GP1200R GP1200 Air Intake Silencer Box 67X-14440-00-00 $44.99

Yamaha 2000 2001 2002 GP1200R Air Intake Silencer Hose Pipe 67X-14419-00-00 $64.99

Electrolux EF54 Micro Filter for Z5626 Oxygen, Excellio, Clario For series Bolido, Clario, Excellio, Oxygen, Smartvac, Titan, Ultra-Silencer Fits Electrolux XXL42 Ergospace , Electrolux XXL60 Ergospace , Electrolux XXL73 Ergospace , Electrolux XXLBOX1C Ergobox , Electrolux XXLBOX1F Ergobox , Electrolux XXLBOX1W Ergobox , Electrolux XXLBOX2 Ergobox , Electrolux XXLBOX3 Ergobox , Electrolux XXLBOX4F Ergobox , Electrolux Z3300 Ultra Silencer , Electrolux Z3306 Ul…

Air Compressor 3/4 Thread Admitting Port Muffler Inlet Filter Silencer $5.57 Black plastic construction compressor muffler use for admitting port; Easy to install by the 3/4″ thread; Weight: 109g; Package Content: 1 x Compressor Muffler…

Solberg F-19P-100, Small Compact Inlet Filter for Compressors & Blowers, 1MPT, 35 SCFM $39.55 Intake filter for reciprocating compressors, rotary screw compressors, regenerative blowers, positive displacement blowers, and other similar equipment. Carbon steel housing construction, 1″ MPT, 35 SCFM, 6-5/8″HT, 6″OD, 99% efficient @ 5 microns polyester element…

Solberg FS-10-050, Miniature Filter Silencer/Breather for Compressors & Blowers, 1/2 MPT, 12 SCFM $23.65 Intake filter silencer for reciprocating compressors, rotary screw compressors, regenerative blowers, positive displacement blowers, and other similar equipment. Carbon steel housing construction, 1/2″ MPT, 12 SCFM, 4-1/8″HT, 4-1/8″OD, 99% efficient @ 2 microns paper element…