Thursday, June 15, 2017

Dunlop K180 Available in US!

Dunlop K180 Available in US finally and we just got front and rear tire set from Westfield Powersports !

Furuhashi Racing want to say big thank you to Suzuki motorcycle USA!

This tire is original equip for SUZUKI VANVAN200 (RV200). You can purchase this Dunlop K180 tire from Suzuki parts dealer.

Suzuki Parts Number:

Front: 55110-13G10 (Size 130/80/18)

Rear : 65110-13G10 (Size 180/80/14)

Retail price F:$195.86 R:$187.51
(*Check your local Suzuki dealer for price.)

Tuesday, September 20, 2016



2001 HONDA XR100 $900.

Dunlop GT501F is on rear wheel. Price include spare rear wheel w nobby tire. 

2006 HONDA CRF100 $1400

Female rider owned and not much ridden.  
Everything very clean.

Both bike has stock motor. Good running condition. Locate in Indianapolis, IN
Bike maintenance and WPC Treatment also available  ( with additional price.)

If you have interest, Please email to Koji.

Sunday, August 28, 2016

Back from hibernation.

We have so much rain this August in Indy. Race has been cancel many times by bad weather. This Saturday was also. 

Complete shape back.

We put this Yamaha back together to running condition. This flat track modified YZ450F has very nice Jemco exhaust pipe. 

Pipe end diameter is about 4"

Guess who forgot to remove pipe end cap and trying kick start..?

Cap fly away there.

The cap flying distance shows this bike has pretty good compression.

Have a nice day.

Sunday, July 24, 2016

Mikuni TMR project

All information in this article is not for the amateur or person who is inexperienced at motor work. This is not a tuning manual. Motor work has many kinds of risk and motorcycles can cause you serious injure or death. Take your own risk and responsibility if you attempt to work or to ride. We hope we can leave this article open public for enthusiast. Thank you.

 We apologize about took so long from last up date.

Now, Furuhashi Racing's FTW (we calling our TW like this way) project is keep on going!

We decided install Mikuni TMR carburetor this season.

Mikuni TMR carbretor is racing use only and never sold in US market somehow. 
This pumper carb can make nice throttle response and power feeling to bike.

Koji kept this carb for many years in his garage. 28mm diameter is perfect size for TW200 stock displacement.   

This sound made us lean into it.

For fitting:

This carburetor require couple of modification for install to TW. Most issue are Interference with frame and rear shock.

1st: Throttle wire holder. 

TMR stock angle and position.

Yoshimura TMR

Throttle wire needs more slunt angle for fit. This parts release from Yoshimura Japan.

2nd: Rear shock and carburetor, air filter fitting.

Standard intake manifold mount.
Flip upside down. 

We can fit in after intake manifold 180 degree upside down. 

But there is no space for air filter or filter connecting.

This idea is only work for funnel version like this photo. 

"Air filter is necessary for dirt track racing use."


We decided to go to standard intake manifold by original equip angle after many try and error.

Grind off frame and carburetor throttle wire holder just little bitt for made clearance.

 Shorten spigot by lathe would make more space between carb and frame.

Cut and weld 180 degree bend mandrel aluminum tube for make air filter joint.

roll up aluminum sheet metal for joint part and weld together.

Check fitting

checking clearance between rear shock spring. This tight clearance would not see typically street or dirt bike.

Original Idle adjust screw (right side in photo.) has interference with rear shock spring. We put left side one to carb. This piece has long thread length that needed to shorten.

This is how fit looks like. K&N filter stick out from side.  

Side cover will not fit together so, we decided intake tube curve back to inside.

Final shape.

Side cover can stay now.

Adjust carb jetting few and put back together.

3rd: Electric wire and components.

We took off air cleaner box so, Electric components has to be sit some place. 

We made this panel from aluminum sheet metal.

 Fit perfect! (This wire harness is only for racing use. )

Rear fender is totally gone after air cleaner box off so, we made simple & light weight  rear fender by fiber glass sheet. Strong and flexible too.

It's time to ride. 


Koji take this machine to Mid-America Speedway other day.

His Impression:
"Fun, fun and fun. Power feel is big changed. I can tell it has much more power than before. This effect from total tuning so, not only by pumper carburetor. I am not sure how much weight air cleaner box had but bike feel so much lighter and I didn't feel rear wheel mass weight like last I rode here. Race track is little too dry and slipply but now, rear tire making power slide by my throttle control. That couldn't happen before. This bike is totally different from street model.  People judge motorcycle by displacement and spec these days. FTW is street model base air cooled 200cc motor. Maybe some people think "Young donkey"  but I can not tell that way anymore. It just great and fun to ride on dirt track! "

"At main race after sunset, track was packed well by nice moisture down into soil. that meaning we can get really smooth grip like asphalt.  FTW runs well as heat race. I wouldn't say power sliding was exact same as heat race track condition but this power feeling is real. I could really enjoyed race and finished 1st place in mad dog class. I'm trying to make simple expression, this bike just so much fun!"


Furuhashi Racing thanks to : Mid-America Speedway

We service TW/TTR motor maintenance / tuning up and deal WPC treatment in midwest area. Email us if you have interest.

 KFR original big Exhaust valve for sale : eBay link here.

Thursday, November 26, 2015

Thank you for 2015 season.


Thank you for all your support in 2015 season!

"FTW" won mad dog class on 2015 Mid-America speedway race series!

Furuhashi Racing original exhaust valve proven great performance!

@Frankfort half mile. (Please click picture to see photo)

Photo from 520 chain cafe

Full throttle 1/2 mile run at Frankfort, IN

Koji Furuhashi Racing thank you to:
Arai Helmet, BLUETAG, CP Pistons, Durelle Racing, G2 ergonomics, Kadoya, Kersting's Musium, Native eyewear, Redstone Performance Engineering, Racetech,  Rebel Gears, SEV, Smith moto goggle, Sudco, Webcam, Westfield power sports, WPC Treatment USA,  (ABC)

Sunday, October 18, 2015

Good race, good people, good time.

Last weekend at Mid-America Speedway.

Tuesday, June 16, 2015

KFR Japan tour

Story from November 2014.

Christian at Narita airport.

Koji and Christian went to visit Japan.

Very first time visit for Christian. This young man wanted to see the real car culture in Japan. 

"Raise motor sports population" 
That is Furuhashi Racing company's philosophy. Koji decided to take him around his world. We went to many places in 1 1/2 week "short stay."

Tokyo Express way "SHUTO KŌ Highway"

There is no time for sleep! We swing by..

60ft tall real scale Gundam. Odaiba, Tokyo

Nothing but eat first. It's best place to learn how to use chop stick! 
Takoyaki! ( deep fried octopus hush puppies.)

This is curry rice. Another popular food in Japan. You have choice for size from 300g(10oz) to 800g(28oz) by additional price. This size about $5. (Using spoon for curry rice normally.)

Toyota historic car museum
Some how they had 1st gen. Nissan GT-R. There are so many Japanese historic cars. Odaiba, Tokyo

Ramen noodle. Best taste every where! $5.

Udon noodle at Akihabara. They are always reasonable price and will not disappoint taste!

Discount store in Akihabara, so many people.

Akihabara is famous for home & PC electrics shopping. We found some racing stuff here.

SEV showroom -Gotanda, Tokyo

Dennys is open business on only 2nd floor. Little high class menu and price than US Dennys. Taste is great.  Gotanda, Tokyo

Tokyo tower. World famous by Godzilla movie.

We believe that TAXI will take us to destination REALLY FAST.

We swing by car parts and repair store in town, and saw Ferrari testarossa Koenig special in work space. How did this monster get here!? Saitama city, Saitama.

WPC treatment Japan head quarter Sagamihara, Kanagawa

It's time for business, we move to west side of Tokyo.

They show us their great facility and racing activity status. Their treatment is deep into factory racing for JGTC and Formula class. 

WPC treatment USA link.

Nice smiles, nice interesting fashion at gift shop. China town Yokohama, Kanagawa.

Nissan Motor Company Headquarters. 

Show room inside is nice. It's just an amazing place. We could see past and future automotive life here. 

Air suspension can adjust van's height. Easy entry for wheel chair.

We could feel GT-R.

Time for racing. We are in Twinring Motegi for JGTC final. -Motegi, Tochigi

GT-R race car cockpit.  

Nissan factory GT-R. We can see catalyzer exhaust part.

 Living legend GAN-san. (Motoharu Kurosawa. 1st Generation Nissan Skyline GTR factory driver.)

Second generation, Takuya Kurosawa.

Toyota Prius hybrid racing car. 

Pit walk time for kids.  Great race event for many generation. We give a special thank you to HIDE from SEV ( ) You awesome!
SEV supporting many team and athletes. Also Furuhashi Racing!

Lamborghini race car.

Cock pit. We can see SEV is in here.

Also here.

NSX proto type

Mugen CR-Z

Autobacs CR-Z and "DK"

Beauty umbrella girls.

Nice to see Civic Type R pace car. They had NSX type-R pace car too. It must have some reason why US customer couldn't buy these cars..

 Qualifying day over. We went to local restaurant call RAIMU. Koji has known this place for long years from his early racing career. Best food and drink and nice people!

with "Big Mama". Thank you so much.

We come by Seven-Eleven before into circuit. This small store is concentrated Walmart! You can buy everything here.

 Honda Collection Hall
 Oval piston NR750
Asimo robot

World's treasure are here. People need come here once before they die.

 We found best spot for watching!

There are many events going on everywhere.
Dry carbon mono-cockpit.

We had great show. Get out from circuit traffic wasn't bad. It was just under two hours.. then after that we drove few hours to go back to Tokyo area.

We are back to sight seeing.

Ikebukuro, Tokyo

"Mister Donut" not too sweet. About $1/piece 

JR Train line is best transportation here in Tokyo.

 Asakusa, Tokyo

 Highest tower "Sky Tree". Asakusa, Tokyo

Christian's best performance photo in this trip, thanks.

We were out to Tokyo express way in night time. There are many street riders and car enthusiast out there enjoying ride and drive and meeting at parking area. (We are sorry, we don't have picture.)

We move to next place call Tsukuba Circuit. MAZDA had rotary motor event there .

Tsukuba circuit 2000.
 All rotary motor. Sounds are wonderful!

 Where is original 7 parts?
 has nice flare.
 Best co-driver we've ever seen.
This small car has 660cc motor in it. (not rotary) 

After event at Tsukuba 1000 track pit.

Last day, h
e could try Sushi go round.

Dish/$ basically. Some dish are little higher.
You can order by touch panel that has English. Menu variation are not only fish.
Would you still ask how taste was?

Words, Internet picture and youtube, can show but not enough.

Eat-Car-Eat-Car.. That was his first time of Japan trip. What Koji heard from Christian " I will be come back here! "

Trip (Experience)  is sometime worth more than anything. We look forward to his future what ever he will be.