Introduction of Representative and Company

In the late 1992,I resigned from a foreign automobile maker where I have been working for and started business as a subcontractor based on the request of component manufacture from acquaintance who were working in automobile industry.

After that, my main customer for my wholesale did a midnight disappearing act,I took this opportunity and I published the parts to magazines and started a mail order business.

As I was still unknown at that time,I worked for KENTEC in a day time and earned money as a track driver at night.
It was very hard time because I was too busy to sleep more than 3 hours every night.

Because I did my best,I had achieved to expand product lineups,complete show rooms and start making an average profit.

However,I lost my capital for new products in unexpected incident and I lost my motivation in working for a while.

As I learned from this incident,I decided to incorporate a company and embark on selling customized cars meanwhile upgrading selected products.

From this time,I got high evaluation to my products and service and I was becoming well known.

Since I possess some customized Harley,I started Harley selling based on the increment of Harley riders in my customers.

Regarding parts for Harley,since I have contracted with 8 companies in U.S and Europe,we can arrange such parts in most of brands for our customers.

In these years,our business of customized automobiles and developed parts was not in a large scale due to my terrible accident.
However,since I recovered already,now you can expect we resume such business of manufacturing full customized Harley and domestic cars and developing parts which I’m proud to show to everyone.

Finally,I highly appreciate my staffs that helped me greatly during my injury.
And we would like to tell you that we will unite and do our very best for our customer aiming further growth.

KENTEC Limited,
4-27-9,Azusawa,Itabashi,Tokyo,Japan 〒174-0051
TEL +81-3-5914-1270
FAX +81-3-5914-1281
Number of LiCENSE for secondhand dealing:No.306680206067
given by Tokyo Metropolitan Public Safety Commission 
Name of Representative  Kenichi Yoshioka


Our Selected Products

Please let us introduce about our mufflers as example.

To perform the best quality,we are manufacturing mufflers in a domestic factory.

The mufflers basically adopt to 2 in 1 design and is closely equipped with the body so that your legs don’t easily touch it.

And also designed not to hit the ground in the right corner, and even reducing the vehicle height to some extent.

Unlike regular mufflers and twin mufflers,our 2 in 1 designed mufflers is constructed to make heavy bass sounds and make your motorcycle powerful.

(Classic Style:We use Harley silencer parts for Fish,FL and Gordon)

Each mufflers is carefully manufactured by skilled craftsman in the whole process of Cutting pipes,Bending,Welding,Buffing,Chromium plating. Furthermore,we repeat actual traveling tests as our internal customized process to enhance sounds quality and performance to the level that our customers appreciate.

We execute expensive and the best high quality Chromium plating on mufflers as final process so that they become strong against rusting and keep shining forever such as like a mirror with your proper maintenance.


DS4 which passed various actual running test for more than 10 years since it was manufactured



Example of measurement for extremely thick and 2 in 1 designed slash cut muffler for VT1300CX manufactured in recent year

Please enjoy sparkle of the muffler as if displayed for custom show and gentle and heavy bass sound.

Parts from Overseas

Parts from  Overseas.jpg

Since we have official dealer agreements with most of main parts brand in overseas such as America and Europe,the various parts such as stretch tanks,parts for billet front,springer forks,billet wheels,breaks,hand controls,forward controls,parts for engine,front and rear fenders,rear wide kits,e.t.c..) which is not easy to find in the Japanese market but you can found only here,not all distributed in large quantity in Japan but they have the available products.

Only few products are shown on homepage but please feel free to inquire if you seek for any specific parts or information.
With regard to price for all parts,we are doing our best as much as possible to meet your requirement.

In addition,though we are mainly dealing parts for American (Harley and American domestic brands),we can also arrange and provide parts for super sports type of Japanese motorcycles (ex. Billet wheels,rear wide kits,rear down kits,drag style mufflers and e.t.c.), Ducati,BMW,TRIUMPH and aftermarket parts from other European countries.

If you are looking for some products,please feel free to contact us by sending email to info@e-kentec.com

Aftersales Service

We are pleased to help your parts equipment with your cars and automobiles for the customer who purchased our products.

In the case that the measurement for parts equipment is different from the inspection certification for your automobile,We can also accept your application for remodeling and change in the construction of type designated motor vehicles.

Please feel free to contact us by telephone or email.

Access to showroom




Custom & Parts KENTEC
〒174-0051 4-27-9,Azusawa,Itabashi-ku,Tokyo
TEL 03-5914-1270
FAX 03-5914-1281


By train
About a 10-minute walk from the JR Saikyo Line Kita Akabane Station
  Go out to the right from the ticket gate of Akabaneguchi and go right on the Kanpachi street (towards Nakasendo).


By Cars & Automobile
From the outer tracks of Kanpachi road (Setagaya) direction,
Go to Yahara direction and the Akabane district in Iogi tunnel~
Pass the Nakasendo Shimura Sanchome intersection~
Left side after the fourth signal.
From R122-uplink (Kawaguchi) direction,
Pass Shin Arakawa Ohashi~Turn right at the intersection of Akabane on Kanpachi road~
Pass Saikyo Line Kita Akabane Station overhead~
Pass the intersection that G・S (shell) is right side.
Right side after fourth signal.
From the outer tracks of Kannana road(Ota-ku) district,
Turn left Nakasendo (R17) Yamato-cho intersection~
Turn right at Shimura 3 chome intersection~
Left side after fourth signal.
From the inner tracks of Kannana(Katsushika-ku) district,
Turn right at Miyahori intersection on Kitamoto Street(R122)~
Go straight at Akabane intersection and go Kanpachi road
Pass Saikyo line Kita Akabane Station overhead~
Pass the intersection that G・S(shell) is right side.
Right side after fourth signal.
From Omiya bypass uplink Sasame Bashi direction,
across Sasame-bashi
Go straight at Mizono 2-chome intersection
Go to Higashisakashita direction under Shutokousoku
Go to Nishidai intersection towards Maenocho direction
Turn left at the intersection under Kanpachi-dori
Pass Nakasendo Shimura 3 chome intersection
Left side after fourth signal.
From Nakasendo (R17) uplink, Todabashi direction,
across the Todabashi~Pass Shimura 3 chome intersection
Left side after fourth signal.


Q&A for Mufflers and Parts

Click here to see examples of necessary tools.

Click here to see how to remove a muffler from motorcycle.

For Beginner (Mufflers)

  1. It is possible to install the muffler by using some additional tools that can remove regular mufflers.
  2. We designed a manual for muffler equipment which can enable you to work without any fixation to your motorcycle and in the easiest possible way.
  3. As the place of equipment is a little bit different in each flame of motorcycles (even the same types of the new model and the secondhand ones),We would recommend you to make final tightening of your equipment after you assemble it temporarily and adjust it to needed point of mounting.
  4. An important point when you install muffler;since there is gasket at an engine,binding site between an engine and a muffler(sometimes it’s difficult to find because of its black stain) so the old gasket needs to be changed to new ones in order to avoid exhaust gas.
  5. After installing,please check if the muffler is set up properly by checking after fire,back fire and sound volume.
  6. In the case that your Cabreter motorcycle happened to have an after fire as mentioned in article 5,please make a fuel adjustment and it will be the best option.
  7. In the case that your motorcycle of injection type has an after fire as mentioned in article 5,the computer program will get notified from the signals of O2 sensor after a traveling for a while.
  8. Regarding the sounds volume,by installing option stainless wool in silencer,the volume of the sound can be adjusted to various settings such as a regular volume,intermediate volume or comfortable heavy bass depending on your preference.
  9. Regarding the relationship between sound volume of muffler and torque;
    -When in low volume,it gets low revolution like as a regular muffler.It’s a torque type.
    -When in High volume,it’s not a torque type anymore but it will get a middle and high revolution unlike a regular muffler and you will know the difference when you drive on highway at motorcycle touring.

For Intermediate (DS4/DSC4 car carburetor air cleaner)

  1. Air cleaners are currently sold from a variety of manufacturers,but the parts with full power specification is only available in our company.
  2. In the case of DS4/DSC4,since you can unscrew the back cover of the carburetor without removing its body,it is possible to upgrade it to full power specification easily.
  3. If you change DS4/DSC4 to full power specification,it is no longer said to be slow motorcycle anymore and touring with a large size American motorcycle will not bother you.
  4. To complete setting to the best condition,please adjust the muffler to low revolution by the pilot screw,rearrange middle and high revolution to a supplied jet and adjust;also tuning since it is twin cab.
  5. An important point: When you remove the back cover of carburetor,it’s better to turn it while providing shock with shock driver or driver for penetration not to cut + screws.
  6. As the other notes,insulator of DS4/DSC4 (the rubber part that connects the engine and carburetor),which is called as “intake manifold”often get deteriorated. If there is a crack,it would have a bad condition due to the absorption of a secondary air from there so it would need to be replaced.
  7. Most of our customers who set a muffler to a perfect condition by replacing our air cleaner say that fuel economy has improved better than regular motorcycles and such specifications can pass inspection.

We would like to answer to your following questions as clearly as possible;
questions about our parts,how to adjust and install,little questions about the vehicle from domestic makers and Harley,Advices about purchasing vehicle,customizing your favorite motorcycle,inspection after implement of customize and so on.

Please feel free to contact us by e-mail or telephone.