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Volume Buang : 92db
Dogfight Racing chamber that is used in the SP250 class of the Kanto Championship and other regional championships throughout Japan.
The features of Dogfight Racing's high quality chambers, which are produced based on feedback from data obtained during fierce battles, are the same shape, materials, and dimensions as those used in actual races.
■Commitment to Materials
The 0.8-mm-thick stainless steel plates used for the material are those used for raising.
Although this method is slightly more costly, the good weldability enables high-precision welding and less rusting, which leads to a beautiful finish.
■Welding Method
The most labor-intensive welding method is the ring-cutting method.
This is used not only for its high dimensional accuracy, which is the lifeblood of the chamber, but also for its high strength that comes from welding the chamber in the form of a band.
Three types of welding machines, TIG, GAS, and semi-automatic welding, are used depending on the location, but the fact that there is no unevenness in the welded parts and the width can be kept to a minimum is due to the advanced techniques of Dogfight Racing, who produce each piece by hand, producing beautiful weld lines.
■ Stainless steel rigid plate with extremely low rusting
The steel plate used to protect and maintain the beautiful form of the DFR chamber is made of stainless steel.
Furthermore, the use of aluminum flanges and stainless steel bolts and nuts prevents the formation of rust.
■Shape determination
In determining the overall shape of the chamber, the straight shape with the highest exhaust efficiency is given the highest priority.
The DFR chambers are made with minimum bending angles for this purpose, and the clearance between the chamber and the swingarm and cowl is kept as close to the limit as possible.
In addition, in order to achieve both aesthetically pleasing appearance and ease of installation, the product is manufactured using an assembly jig for each model that eliminates product errors.
This allows the user to replace the cowl with a bolt-on, eliminating the need for any cutting or modification of the cowl.
■Completely cuts exhaust leaks
The aluminum flange that joints the engine and chamber is smoothly connected from an oval shape to a perfect circle to improve exhaust and filling efficiency.
Since a reduction in exhaust pressure caused by exhaust leakage immediately leads to a reduction in power, exhaust leakage is completely eliminated with a heat-resistant O-ring.
■Racer sound and high exhaust efficiency
Straight aluminum silencer that achieves a sporty sound and high exhaust efficiency.
And carbon silencer which is even lighter than an aluminum silencer.
Each DFR chamber is individually lot controlled and all repair parts are available, even just a single bolt.
■Dogfight Racing has repeatedly improved the stainless steel chamber based on the data from the steel chamber, not only with bench tests but also with driving tests.
This is a newly designed chamber with full feedback from Dogfight Racing's racing technology, including actual racing.
We have developed it in the field of the race in the circuit, and spent a lot of time for the actual driving test in the town.
This improves the mid-range torque and over-rev characteristics compared to the conventional steel chambers, making it a product that can be used in a wide range of situations from the circuit to the street.
The expansion chamber has been enlarged to the maximum limit while taking into consideration the shape of the swingarm of both gull arm and pro arm, and we have pursued as much as possible in order not to miss even the slightest power increase.
It took me a long time to get the best performance out of it, but I am satisfied with the performance, serviceability, and the visual and sense of ownership.
Just by installing it, you can feel the power up in the whole range.
The right side expansion chamber may come in contact with a stock cowl.
It is recommended to cut the under cowl or use a collar to release it.
And after all, it's stainless steel.I don't have to worry about rust anymore.
We have succeeded in shutting out almost all rust by using aluminum flange and light weight carbon silencer.
The bolts used are also made of stainless steel or plated material to prevent rusting.
This is the perfect choice for riders who want to keep their bikes with them for a long time.
