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CB400SB I・II・III[BC-NC39]
CB400SF H-VTEC [BC-NC39]
Product Detail
Specification:
Full Exhaust
Volume: 92db
JMCA bike Inspection:○
JMCA Approved Products:○
Oil Filter:○
Oil Drain:○
Center Stand:-
stock & Pillion Step:○
Volume: 92db
JMCA bike Inspection:○
JMCA Approved Products:○
Oil Filter:○
Oil Drain:○
Center Stand:-
stock & Pillion Step:○
[Description]
The new lineup of JMCA certified models from WR's, a company that knows all about the middle class.
The exhaust system has been changed from the conventional 4-1 type to the newly designed 4-2-1 type, which is a high-end model that surpasses the conventional superbike full exhaust system.
Completely new design developed from a new viewpoint by carefully selecting the collecting part and pipe length according to each model.
You will be satisfied with the power feel that you can feel from the low speed torque by taking full advantage of the characteristics of the 4-2-1 system, not to mention the form and the texture of a class higher.
The silencer has a straight structure.Newly designed model with a sense of power from the accelerator response while also responding to aging.Please enjoy "WR'sPOWER" with more peace of mind.
Developer's Long Comment
For a long time, WR's products have been in the "4-1 group" style.
In fact, there is a "partition plate" in the collecting part with a length corresponding to the bike, and most of the models have a "4-2-1" structure.This is to compensate for the low to mid range torque of the "4-1" type which has a high rpm characteristic.
Moving on to the JMCA approved full exhaust for CB400SF / SB, WR's has adopted the 4-2-1 type as you can see.The conventional exhaust for CB400SF was developed with the focus on the characteristic of high rpm, and the power at high rpm of 4-1 characteristic was secured by adjusting the divider plate of the assembly part so that the low and middle speed are not sacrificed.
At the time of the last development, developers thought that there was no "unfinished business", but when the handling changed, there were more "things that can be done" than "unfinished business", and they repeated the bench test as much as the development of a new vehicle.
As a result, WR's adopted the same type of center pipe as the stock one, that is, No.1, No.2, No.3 and No.4 are assembled first, and this type is more focused on high speed range than the same 4-2-1 type that No.1, No.4, No.2 and No.3 are assembled.
Not sure what to make of it, but thinking it's a good idea. In the high rpm range from 7000rpm to 11000rpm, the power is much higher than the stock, and even in the 6th gear limiter stage, the power still continues to increase.
You know well that the length and thickness of the pipe play an important role in the power curve.
However, the assembly part (socket) was especially important for me in this development.
The power curve is determined by the length and the thickness of the pipe, but if the size of the exhaust is not correct, the 4-2-1 type exhaust will not have enough low speed torque or power valley.
As a side note, it is also important for racing exhausts that emphasize only high rpm, and the size of this part can change the character of the exhaust.
The characteristics of "strong and easy to handle" are greatly influenced by this part, so WR's tested it carefully.
WR's feel that ease of riding and power is a necessary theme for middle riders, so they plan to challenge this theme in our future lineup.
In addition, the new silencer which is specially designed with a straight structure has been manufactured with confidence in the volume, sound quality and the goodness of the release.
This silencer is not equipped with inner baffle, but WR's is confident that the baffle is good enough for the stock vehicle.We hope you will enjoy the beautiful technical lines and texture of the "4-2-1" and the different power characteristics from the "4-1" type.
The exhaust system has been changed from the conventional 4-1 type to the newly designed 4-2-1 type, which is a high-end model that surpasses the conventional superbike full exhaust system.
Completely new design developed from a new viewpoint by carefully selecting the collecting part and pipe length according to each model.
You will be satisfied with the power feel that you can feel from the low speed torque by taking full advantage of the characteristics of the 4-2-1 system, not to mention the form and the texture of a class higher.
The silencer has a straight structure.Newly designed model with a sense of power from the accelerator response while also responding to aging.Please enjoy "WR'sPOWER" with more peace of mind.
Developer's Long Comment
For a long time, WR's products have been in the "4-1 group" style.
In fact, there is a "partition plate" in the collecting part with a length corresponding to the bike, and most of the models have a "4-2-1" structure.This is to compensate for the low to mid range torque of the "4-1" type which has a high rpm characteristic.
Moving on to the JMCA approved full exhaust for CB400SF / SB, WR's has adopted the 4-2-1 type as you can see.The conventional exhaust for CB400SF was developed with the focus on the characteristic of high rpm, and the power at high rpm of 4-1 characteristic was secured by adjusting the divider plate of the assembly part so that the low and middle speed are not sacrificed.
At the time of the last development, developers thought that there was no "unfinished business", but when the handling changed, there were more "things that can be done" than "unfinished business", and they repeated the bench test as much as the development of a new vehicle.
As a result, WR's adopted the same type of center pipe as the stock one, that is, No.1, No.2, No.3 and No.4 are assembled first, and this type is more focused on high speed range than the same 4-2-1 type that No.1, No.4, No.2 and No.3 are assembled.
Not sure what to make of it, but thinking it's a good idea. In the high rpm range from 7000rpm to 11000rpm, the power is much higher than the stock, and even in the 6th gear limiter stage, the power still continues to increase.
You know well that the length and thickness of the pipe play an important role in the power curve.
However, the assembly part (socket) was especially important for me in this development.
The power curve is determined by the length and the thickness of the pipe, but if the size of the exhaust is not correct, the 4-2-1 type exhaust will not have enough low speed torque or power valley.
As a side note, it is also important for racing exhausts that emphasize only high rpm, and the size of this part can change the character of the exhaust.
The characteristics of "strong and easy to handle" are greatly influenced by this part, so WR's tested it carefully.
WR's feel that ease of riding and power is a necessary theme for middle riders, so they plan to challenge this theme in our future lineup.
In addition, the new silencer which is specially designed with a straight structure has been manufactured with confidence in the volume, sound quality and the goodness of the release.
This silencer is not equipped with inner baffle, but WR's is confident that the baffle is good enough for the stock vehicle.We hope you will enjoy the beautiful technical lines and texture of the "4-2-1" and the different power characteristics from the "4-1" type.
Caution
*There may be changes in product specifications due to the manufacturer's reasons.
Applicable Models
CB400SB I・II・III[BC-NC39]
CB400SF H-VTEC [BC-NC39]
