KFR first product release!

Exhaust big valve for Yamaha TW200, TT-R225-230.(*Picture front. Back side is yamaha's stock.) 

1.0mm larger than stock.

$32 per piece plus tax (Indiana residents only) and shipping.
Ships from Indianapolis, IN


*Limited quantity






"I would try to go if no one try that line." When Koji is riding on oval track, his thoughts go many ways and that is one of his thoughts.  


That racing mind created this exhaust big valve for Yamaha TW200, TTR225-230 and more models.



Recent top dirt track race machines are run by a really high performance motor from Japanese 450cc Motocross bike. Those motors are great for racing. But also make high running cost to keep up that performance level. 

Race bike will keep going up higher performance with cost. It means getting step far away from street bike and riders who want to try to start race.

We'd like to make more people enjoy the race and customize their own bike with reasonable cost.

Our answer is here. We are happy to introduce this big valve for Yamaha TW and TT-R engine that two valve SOHC designed motor.


"Race bike for race, race for race bike." That is OK, pure racing model exists already. TT-R or TW are not for that purpose but very good model for beginning level low budget racer and mechanic. Koji decided to produce this part because of that reason. And, he started to have interest to how "his donkey" can go faster. (maybe that is his main reason!)

It gives you more exciting high revolution power with other tuning combination. 

We are happy to share this product for your bike and make your imagination a success! 




Notice: It is built for high performance racing engines. Because of potential abuse, no warranty is offered.



*Other model fits by Yamaha OEM parts number 5H0-12121-00(or 01)-00

TW200 All year models.

1983 YTM200EK VALVE
1983 YTM200K VALVE
1983 YTM225DXK VALVE
1984 TRI-MOTO - YTM200L VALVE
1984 TRI-MOTO 225DX - YTM225DXL VALVE
1984 YAMAHAHAULER - YTM200EL VALVE
1985 MOTO-4 - YFM200N VALVE
1985 TRI-MOTO - YTM200ERN VALVE
1985 TRI-MOTO - YTM200N VALVE
1985 TRI-MOTO - YTM225DRN VALVE
1985 TRI-MOTO - YTM225DXN VALVE
1986 MOTO-4 - YFM200DXS VALVE
1986 MOTO-4 - YFM225S VALVE
1986 TRI-MOTO 4-STROKE - YTM225DRS VALVE
1987 MOTO-4 - YFM200DXT VALVE
1987 MOTO-4 - YFM225T VALVE
1988 MOTO-4 - YFM200DXU VALVE
1989 MOTO-4 - YFM200DXW VALVE
1989 MOTO-4 - YFM250W VALVE
1989 PRO HAULER 1889 PRO-4 - YFU1W VALVE
1989 PRO-4 PRO HAULER W-TURF TIRES - YFU1TW VALVE
1990 MOTO-4 - YFM250A VALVE
1991 MOTO-4 - YFM250B VALVE
1992 TIMBERWOLF 2WD - YFB250D VALVE
1992 YFB250D_MN VALVE
1993 TIMBERWOLF 2WD - YFB250E VALVE
1993 YFB250E_MN VALVE
1994 TIMBERWOLF 2WD - YFB250F VALVE
1994 TIMBERWOLF 4WD - YFB250FWF VALVE
1994 YFB250FWF_ VALVE
1994 YFB250FWF_MNH (ME & NH Only) VALVE
1995 TIMBERWOLF 2WD (ME & NH Only) - YFB250FWG_MNH VALVE
1995 TIMBERWOLF 2WD - YFB250FWG VALVE
1995 TIMBERWOLF 2WD - YFB250FWG_ VALVE
1995 TIMBERWOLF 2WD - YFB250G VALVE
1995 YFB250G_MNH (ME & NH ONLY) VALVE
1996 TIMBERWOLF - YFB250H VALVE
1996 TIMBERWOLF 2WD - YFB250FWH VALVE
1996 TIMBERWOLF 2WD - YFB250UH VALVE
1996 YFB250FWH_ VALVE
1996 YFB250FWH_MNH (ME &NH Only) VALVE
1996 YFB250H_MNH VALVE
1996 YFB250UH_MNH VALVE
1997 TIMBERWOLF 2WD (ME & NH Only) - YFB250FWJ_MNH VALVE
1997 TIMBERWOLF 2WD - YFB250FWJ VALVE
1997 TIMBERWOLF 2WD - YFB250FWJ_ VALVE
1997 TIMBERWOLF 2WD - YFB250UJ VALVE
1997 YFB250UJ_M VALVE
1981 SR185H VALVE
1982 SR185J VALVE
1982 XT200J VALVE
1983 XT200K VALVE XT200K - KC
1985 BIG WHEEL - BW200N VALVE
1986 BIG WHEEL - BW200S VALVE
1986 BIG WHEEL ELEC START - BW200ES VALVE
1986 TT225S VALVE
1987 BIG WHEEL ELEC START - BW200ET VALVE
1987 TT225T VALVE
1988 BIG WHEEL ELEC START - BW200EU VALVE
1992 SEROW - XT225D VALVE
1992 SEROW - XT225DC VALVE
1993 SEROW - XT225E VALVE
1993 SEROW - XT225EC VALVE
1994 SEROW - XT225F VALVE
1994 SEROW - XT225FC VALVE
1995 SEROW - XT225G VALVE
1995 SEROW - XT225GC VALVE
1996 SEROW - XT225H VALVE
1996 SEROW - XT225HC VALVE
1997 SEROW - XT225J VALVE
1997 SEROW - XT225JC VALVE
1998 TIMBERWOLF - YFB250UK VALVE
1998 TIMBERWOLF 4WD - YFB250FWK VALVE
1998 YFM250UK VALVE
1999 BEAR TRACKER 2WD - YFM250XL VALVE
1999 BEAR TRACKER 2WD - YFM250XLC VALVE
1999 TIMBERWOLF 2WD - YFB250FWL VALVE
2000 BEAR TRACKER 2WD - YFM250XM VALVE
2000 BEAR TRACKER 2WD - YFM250XMC VALVE
2000 TIMBERWOLF 4WD - YFB250FWM VALVE
2001 BEAR TRACKER 2WD BEAR TRACKER REALTREE - YFM250XHN VALVE
2001 BEAR TRACKER 2WD BEAR TRACKER REALTREE - YFM250XN VALVE
2002 BEAR TRACKER REALTREE - YFM250XHP VALVE
2002 BEAR TRACKER REALTREE - YFM250XP VALVE
2003 BEAR TRACKER - YFM250XR VALVE
2004 BEARTRACKER - YFM25XS VALVE

1998 SEROW - XT225K VALVE
1998 SEROW - XT225KC VALVE
1999 OFF-ROAD (Deep Purplish Blue Solid E) (CA Ed.) - TTR225LC VALVE
1999 OFF-ROAD (Deep Purplish Blue Solid E) - TTR225L VALVE
1999 OFF-ROAD - TT225L VALVE
1999 OFF-ROAD - TT225LC VALVE
1999 SEROW - XT225L VALVE
1999 SEROW - XT225LC VALVE
2000 SEROW - XT225M VALVE
2000 SEROW - XT225MC VALVE
2001 TTR225 (Deep Purplish Blue Solid E) (CA Ed.) - TTR225NC VALVE
2001 TTR225 (Deep Purplish Blue Solid E) - TTR225N VALVE
2001 TTR225 - TT225RN VALVE
2001 TTR225 - TT225RNC VALVE
2001 XT225 - XT225N VALVE
2001 XT225 - XT225NC VALVE
2002 TTR225 - TTR225P VALVE
2002 TTR225 - TTR225PC VALVE
2002 XT225 - XT225P VALVE
2002 XT225 - XT225PC VALVE
2003 TTR225 - TTR225R VALVE
2003 TTR225 - TTR225RC VALVE
2003 XT225 - XT225R VALVE
2003 XT225 - XT225RC VALVE
2004 TT-R225 - TTR225S VALVE
2004 TT-R225 - TTR225SC VALVE
2004 XT225 - XT225S VALVE
2004 XT225 - XT225SC VALVE
2005 TT-R230 - TTR230T VALVE
2005 TT-R230 - TTR230TC VALVE

2005 XT225 - XT225T VALVE
2005 XT225 - XT225TC VALVE
2006 TT-R230 - TTR230V VALVE
2006 XT225 - XT225V VALVE
2006 XT225 - XT225VC VALVE
2007 TT-R230 - TTR230W VALVE
2007 XT225 - XT225W VALVE
2007 XT225 CA - XT225WC VALVE
2008 TTR230 (DEEP PURPLISH BLUE SOLID E) - TTR230X VALVE
2009 TTR230 (DEEP PURPLISH BLUE SOLID E) - TTR230Y VALVE
2011 TTR230 - TTR230A VALVE