Is k-speed.com the official global store for Diabolus and K-SPEED custom parts?

Yes, k-speed.com is the official global online retailer of genuine Diabolus by K-SPEED motorcycle parts and Tanadit Design custom builds, offering authentic brand warranties and direct international support.

How does K-SPEED ensure accurate fitment for Honda Rebel, CT125, and other models?

All K-SPEED and Diabolus custom parts are precision-engineered and test-fitted on specific motorcycle models and model years, including Honda Rebel 250, 300, 500, 1100, CT125 Trail, Dax 125, and Triumph 400 series for easy bolt-on installation.

What are the worldwide shipping options and delivery times for the US, Europe, and APEC?

We provide fast worldwide express delivery with full end-to-end tracking to North America, Europe, Australia, and over 80 countries globally. Orders are securely packaged to ensure safe international transit.

What is the advantage of ordering from k-speed.com over third-party or parallel sellers?

Ordering directly from k-speed.com guarantees 100% authentic Diabolus components, direct factory quality control, correct regional pricing, and official after-sales support.

K-SPEED Diabolus Honda Monkey 125 Retro Full System HM021J

K-SPEED Diabolus Honda Monkey 125 Retro Full System HM021J

Name: K-SPEED Diabolus Honda Monkey 125 Retro Full System HM021J
Brand: K-SPEED
SKU: カスタム製品
Price: 46700.00 PHP
Availability: InStock

₱46,700.00

(Shipping included / Tax excluded)

K-SPEED HM021J is a custom part for the Honda Monkey 125.

【Compatible Models】
・Honda Monkey 125

【Product Features】
・Diabolus series custom part

【Please check before ordering】
Note:Compatible with models equipped with an O2 sensor in the cylinder head.

This muffler is designed exclusively for models where the stock lambda sensor is mounted directly on the cylinder head (not on the muffler pipe itself).

Since the 2026 Honda Monkey has the lambda sensor located on the cylinder head side, there is no need to connect or move the sensor to the muffler side. The original sensor can be used in its stock position on the cylinder head, allowing for smooth installation without any modification or replacement of the sensor.

Before ordering, please confirm that your vehicle's model, displacement, and year meet the compatibility requirements.