Transmission Kit for DRG

．Applicable model: SYM DRG
．Color: Silver
．Optimized gear ratio configuration:
－OEM: 3.48
－KOSO: 3.23

※ The outer drive face features a forward-leaning blade design - high airflow, excellent heat dissipation, and lightweight - effectively reducing operating load.
※ Die-cast from wear-resistant high-silicon aluminum alloy, precision machined with high-precision diamond tools.
※ Drive face includes cooling design to lower internal operating temperatures and increase roller lifespan.
※ High-precision self-lubricating powder metallurgy bearing reduces runout and increases transmission efficiency.
※ Pressure plate features surface hardening treatment to increase roller wear resistance and self-lubrication.
※ Slider material is high-end engineering plastic, resistant to high temperatures, impact, and wear.
※ Paired with high-roundness, high-precision (weight-calibrated) rollers, resistant to high temperatures, wear, and impact. High-precision center shaft with high hardness, low friction coefficient, and wear resistance.
※ 1000RPM left-hand wound torque spring, silicon-chromium alloy steel material, reduces deformation and resists fatigue.

- Origin -
KOSO was officially established out of the realization that an independently developed brand is indispensable for future market marketing. Therefore, KOSO was registered as a trademark of Tong Ya in 1989. The name KOSO is derived from the Japanese words for "conception" and "high speed"; conception represents creativity, while high speed represents high-performance expression—combined, it reflects the company's hope to use creativity to create high-performance products!

- Spirit -
The brand spirit pursued by KOSO is to build quality, technology, and service on the foundation of integrity and mutual trust. We persistently uphold this attitude, not only manufacturing high-quality products but also pursuing product innovation and quality improvement, hoping to bring even more excellent products to everyone.



- Brand Journey -
Pursuing perfect product design and quality has always been our goal; therefore, KOSO constantly spurs itself on by improving its own technology. We firmly believe that brand image and product quality are synonymous! Thus, the company has strict requirements for product development, production processes, and quality control, hoping to achieve the goal of high quality while stepping onto the world stage. In the future, KOSO will continue to develop more user-friendly and innovative products, and we hope to become the next world number one from Taiwan within ten years, another pride of Taiwan, and the pride of the Taiwanese people.

- Exhibitions and Certifications -
Tong Ya Electronic has been exhibiting in Italy since 2001, gradually stepping onto the international stage, bringing KOSO's dedication and professionalism to the international community, and striving to convey an image of high quality and innovation. It obtained TS16949 international certification in 2007, and ISO 14001 and ISO 45001 international certifications in 2024, and will continue to create more compelling products in the future. Every product launch requires actual installation testing, which is the strictest form of quality inspection. No matter how well a product is designed, once it is actually installed and used, it becomes a test of quality. To further improve quality and conduct actual product testing, we participate in international competitions. However, every award is an affirmation of our products because they are modifications and installations that do not allow for errors; we are this rigorous about quality. Test reports and product measurement charts are also our demonstration of the results of customer installations. It is precisely because of this caution that our products are able to show better quality time after time.




- Equipment and Checkpoints -
The pre-inspection of each of our products uses the most advanced technical machinery, setting different conditions to simulate and conduct tests, such as vibration tests, waterproof tests, etc. All partner manufacturers who have participated in the inspection process agree with our principles of quality control and trust the test results. What is valuable is that under the tests that are like passing levels, we also add different conditions and make adjustments based on the actual environment, and only with user-friendly operation can we present the most realistic tests of the products and the quality improved after corrections.

※The vehicle model may have different specifications in different regions and may not be compatible for installation.

【Notes before ordering】
Before ordering, please double-check the color, size, and other information you wish to purchase.
Most products have delivery times provided after the order is placed, so there may be situations where products are discontinued or require a long wait for shipment.
If an order cannot be established due to factors such as manufacturer stock shortages or temporary inability to deliver, it will not be processed; no fees will be charged if the order is not established.
Please be aware that manufacturers may unilaterally change specifications or exterior designs, resulting in packaging or product styling that differs from the images on the product page.
If a manufacturer's unilateral change in product design or specifications results in the product failing to perform the functions expected at the time of order, please consult our customer service for follow-up processing.
Products go through multiple shipping processes from order to delivery, so packaging may be deformed or damaged during transit, but the product itself remains intact and usable.
【Return Policy】
If you need to return a product, please apply in the return section; please keep the product appearance intact and seal it well in the original packaging box.
Upon receiving your return request, we will dispatch a logistics provider to collect the goods as soon as possible.
For returns due to non-human-induced defects, please apply within 7 days of receiving the product.
【Authenticity Guarantee】
For products with an authenticity guarantee, if they are found to be suspected counterfeits and are confirmed as such by a court judgment after relevant litigation, we will compensate the customer who purchased the product 10 times the original purchase price.