Air Fork Conversion Kit K-Tech

The K-Tech ORSS Air2Spring system replaces the original air cartridge in WP 43 AER and WP 48 AER forks with a more traditional spring version.
Designed and manufactured in the UK, it is produced using the highest quality materials and processes.
The ORSS K-Tech cartridges are a plug-and-play product that requires no special tools or modifications to the forks.
The kit includes everything needed for cartridge installation.
WARNING: The ORSS conversion kit must be paired, depending on the motorcycle model, with a K-Tech fork spring code 435-660 or 385-580 sold separately. Among the springs specific to this kit, various stiffness options are available to suit the rider's weight.

Choose your bike
128 articles
Fork conversion Gasgas 85 MC (21-25) K-Tech - Spring 6.0N
385-580-60
in stock
81.02
Fork conversion Gasgas 85 MC (21-25) K-Tech - Spring 6.4N
385-580-64
in stock
81.02
Fork conversion Gasgas 85 MC (21-25) K-Tech - Spring 6.8N
385-580-68
on demand
81.02
Fork conversion Gasgas 85 MC (21-25) K-Tech - Spring 7.2N
385-580-72
in stock
81.02
Fork conversion Gasgas 85 MC (21-25) K-Tech - Cartridge kit
122-018-155-085
on demand
537.69
Fork conversion Gasgas 125 MC (21-25) K-Tech - Spring 8.0N
435-660-80
in stock
81.02
Fork conversion Gasgas 125 MC (21-25) K-Tech - Spring 8.4N
435-660-84
in stock
81.02
Fork conversion Gasgas 125 MC (21-25) K-Tech - Spring 8.8N
435-660-88
in stock
81.02
Fork conversion Gasgas 125 MC (21-25) K-Tech - Spring 9.2N
435-660-92
in stock
81.02
Fork conversion Gasgas 125 MC (21-25) K-Tech - Spring 9.6N
435-660-96
in stock
81.02
Fork conversion Gasgas 125 MC (21-25) K-Tech - Cartridge kit
122-021-155-001
on demand
537.69
Fork conversion Gasgas 250 MC (22-25) K-Tech - Spring 8.0N
435-660-80
in stock
81.02
Fork conversion Gasgas 250 MC (22-25) K-Tech - Spring 8.4N
435-660-84
in stock
81.02
Fork conversion Gasgas 250 MC (22-25) K-Tech - Spring 8.8N
435-660-88
in stock
81.02
Fork conversion Gasgas 250 MC (22-25) K-Tech - Spring 9.2N
435-660-92
in stock
81.02
Fork conversion Gasgas 250 MC (22-25) K-Tech - Spring 9.6N
435-660-96
in stock
81.02
Fork conversion Gasgas 250 MC (22-25) K-Tech - Cartridge kit
122-021-155-001
on demand
537.69
Fork conversion Gasgas 250 MC-F (21-25) K-Tech - Spring 8.0N
435-660-80
in stock
81.02
Fork conversion Gasgas 250 MC-F (21-25) K-Tech - Spring 8.4N
435-660-84
in stock
81.02
Fork conversion Gasgas 250 MC-F (21-25) K-Tech - Spring 8.8N
435-660-88
in stock
81.02
Fork conversion Gasgas 250 MC-F (21-25) K-Tech - Spring 9.2N
435-660-92
in stock
81.02
Fork conversion Gasgas 250 MC-F (21-25) K-Tech - Spring 9.6N
435-660-96
in stock
81.02
Fork conversion Gasgas 250 MC-F (21-25) K-Tech - Cartridge kit
122-021-155-001
on demand
537.69
Fork conversion Gasgas 350 MC-F (22-25) K-Tech - Spring 8.0N
435-660-80
in stock
81.02
Fork conversion Gasgas 350 MC-F (22-25) K-Tech - Spring 8.4N
435-660-84
in stock
81.02
Fork conversion Gasgas 350 MC-F (22-25) K-Tech - Spring 8.8N
435-660-88
in stock
81.02
Fork conversion Gasgas 350 MC-F (22-25) K-Tech - Spring 9.2N
435-660-92
in stock
81.02
Fork conversion Gasgas 350 MC-F (22-25) K-Tech - Spring 9.6N
435-660-96
in stock
81.02
Fork conversion Gasgas 350 MC-F (22-25) K-Tech - Cartridge kit
122-021-155-001
on demand
537.69
Fork conversion Gasgas 450 MC-F (21-25) K-Tech - Spring 8.0N
435-660-80
in stock
81.02
Fork conversion Gasgas 450 MC-F (21-25) K-Tech - Spring 8.4N
435-660-84
in stock
81.02
Fork conversion Gasgas 450 MC-F (21-25) K-Tech - Spring 8.8N
435-660-88
in stock
81.02
Fork conversion Gasgas 450 MC-F (21-25) K-Tech - Spring 9.2N
435-660-92
in stock
81.02
Fork conversion Gasgas 450 MC-F (21-25) K-Tech - Spring 9.6N
435-660-96
in stock
81.02
Fork conversion Gasgas 450 MC-F (21-25) K-Tech - Cartridge kit
122-021-155-001
on demand
537.69
Fork conversion Husqvarna 85 TC (18-25) K-Tech - Spring 6.0N
385-580-60
in stock
81.02
Fork conversion Husqvarna 85 TC (18-25) K-Tech - Spring 6.4N
385-580-64
in stock
81.02
Fork conversion Husqvarna 85 TC (18-25) K-Tech - Spring 6.8N
385-580-68
on demand
81.02
Fork conversion Husqvarna 85 TC (18-25) K-Tech - Spring 7.2N
385-580-72
in stock
81.02
Fork conversion Husqvarna 85 TC (18-25) K-Tech - Cartridge kit
122-018-155-085
on demand
537.69
Fork conversion Husqvarna 125 TC (17-25) K-Tech - Spring 8.0N
435-660-80
in stock
81.02
Fork conversion Husqvarna 125 TC (17-25) K-Tech - Spring 8.4N
435-660-84
in stock
81.02
Fork conversion Husqvarna 125 TC (17-25) K-Tech - Spring 8.8N
435-660-88
in stock
81.02
Fork conversion Husqvarna 125 TC (17-25) K-Tech - Spring 9.2N
435-660-92
in stock
81.02
Fork conversion Husqvarna 125 TC (17-25) K-Tech - Spring 9.6N
435-660-96
in stock
81.02
Fork conversion Husqvarna 125 TC (17-20) K-Tech - Cartridge kit
122-020-155-001
in stock
537.69
Fork conversion Husqvarna 125 TC (21-25) K-Tech - Cartridge kit
122-021-137-001
on demand
537.69
Fork conversion Husqvarna 250 FC (17-25) K-Tech - Spring 8.0N
435-660-80
in stock
81.02
Fork conversion Husqvarna 250 FC (17-25) K-Tech - Spring 8.4N
435-660-84
in stock
81.02
Fork conversion Husqvarna 250 FC (17-25) K-Tech - Spring 8.8N
435-660-88
in stock
81.02
Fork conversion Husqvarna 250 FC (17-25) K-Tech - Spring 9.2N
435-660-92
in stock
81.02
Fork conversion Husqvarna 250 FC (17-25) K-Tech - Spring 9.6N
435-660-96
in stock
81.02
Fork conversion Husqvarna 250 FC (17-20) K-Tech - Cartridge kit
122-020-155-001
in stock
537.69
Fork conversion Husqvarna 250 FC (21-25) K-Tech - Cartridge kit
122-021-137-001
on demand
537.69
Fork conversion Husqvarna 250 TC (17-25) K-Tech - Spring 8.0N
435-660-80
in stock
81.02
Fork conversion Husqvarna 250 TC (17-25) K-Tech - Spring 8.4N
435-660-84
in stock
81.02
Fork conversion Husqvarna 250 TC (17-25) K-Tech - Spring 8.8N
435-660-88
in stock
81.02
Fork conversion Husqvarna 250 TC (17-25) K-Tech - Spring 9.2N
435-660-92
in stock
81.02
Fork conversion Husqvarna 250 TC (17-25) K-Tech - Spring 9.6N
435-660-96
in stock
81.02
Fork conversion Husqvarna 250 TC (17-20) K-Tech - Cartridge kit
122-020-155-001
in stock
537.69
Fork conversion Husqvarna 250 TC (21-25) K-Tech - Cartridge kit
122-021-137-001
on demand
537.69
Fork conversion Husqvarna 350 FC (17-25) K-Tech - Spring 8.0N
435-660-80
in stock
81.02
Fork conversion Husqvarna 350 FC (17-25) K-Tech - Spring 8.4N
435-660-84
in stock
81.02
Fork conversion Husqvarna 350 FC (17-25) K-Tech - Spring 8.8N
435-660-88
in stock
81.02
Fork conversion Husqvarna 350 FC (17-25) K-Tech - Spring 9.2N
435-660-92
in stock
81.02
Fork conversion Husqvarna 350 FC (17-25) K-Tech - Spring 9.6N
435-660-96
in stock
81.02
Fork conversion Husqvarna 350 FC (17-20) K-Tech - Cartridge kit
122-020-155-001
in stock
537.69
Fork conversion Husqvarna 350 FC (21-25) K-Tech - Cartridge kit
122-021-137-001
on demand
537.69
Fork conversion Husqvarna 450 FC (17-25) K-Tech - Spring 8.0N
435-660-80
in stock
81.02
Fork conversion Husqvarna 450 FC (17-25) K-Tech - Spring 8.4N
435-660-84
in stock
81.02
Fork conversion Husqvarna 450 FC (17-25) K-Tech - Spring 8.8N
435-660-88
in stock
81.02
Fork conversion Husqvarna 450 FC (17-25) K-Tech - Spring 9.2N
435-660-92
in stock
81.02
Fork conversion Husqvarna 450 FC (17-25) K-Tech - Spring 9.6N
435-660-96
in stock
81.02
Fork conversion Husqvarna 450 FC (17-20) K-Tech - Cartridge kit
122-020-155-001
in stock
537.69
Fork conversion Husqvarna 450 FC (21-25) K-Tech - Cartridge kit
122-021-137-001
on demand
537.69
Fork conversion KTM 85 SX (18-25) K-Tech - Spring 6.0N
385-580-60
in stock
81.02
Fork conversion KTM 85 SX (18-25) K-Tech - Spring 6.4N
385-580-64
in stock
81.02
Fork conversion KTM 85 SX (18-25) K-Tech - Spring 6.8N
385-580-68
on demand
81.02
Fork conversion KTM 85 SX (18-25) K-Tech - Spring 7.2N
385-580-72
in stock
81.02
Fork conversion KTM 85 SX (18-25) K-Tech - Cartridge kit
122-018-155-085
on demand
537.69
Fork conversion KTM 125 SX (16-25) K-Tech - Spring 8.0N
435-660-80
in stock
81.02
Fork conversion KTM 125 SX (16-25) K-Tech - Spring 8.4N
435-660-84
in stock
81.02
Fork conversion KTM 125 SX (16-25) K-Tech - Spring 8.8N
435-660-88
in stock
81.02
Fork conversion KTM 125 SX (16-25) K-Tech - Spring 9.2N
435-660-92
in stock
81.02
Fork conversion KTM 125 SX (16-25) K-Tech - Spring 9.6N
435-660-96
in stock
81.02
Fork conversion KTM 125 SX (16-20) K-Tech - Cartridge kit
122-020-155-001
in stock
537.69
Fork conversion KTM 125 SX (21-25) K-Tech - Cartridge kit
122-021-155-001
on demand
537.69
Fork conversion KTM 150 SX (16-22) K-Tech - Spring 8.0N
435-660-80
in stock
81.02
Fork conversion KTM 150 SX (16-22) K-Tech - Spring 8.4N
435-660-84
in stock
81.02
Fork conversion KTM 150 SX (16-22) K-Tech - Spring 8.8N
435-660-88
in stock
81.02
Fork conversion KTM 150 SX (16-22) K-Tech - Spring 9.2N
435-660-92
in stock
81.02
Fork conversion KTM 150 SX (16-22) K-Tech - Spring 9.6N
435-660-96
in stock
81.02
Fork conversion KTM 150 SX (16-20) K-Tech - Cartridge kit
122-020-155-001
in stock
537.69
Fork conversion KTM 150 SX (21-22) K-Tech - Cartridge kit
122-021-155-001
on demand
537.69
Fork conversion KTM 250 SX (16-25) K-Tech - Spring 8.0N
435-660-80
in stock
81.02
Fork conversion KTM 250 SX (16-25) K-Tech - Spring 8.4N
435-660-84
in stock
81.02
Fork conversion KTM 250 SX (16-25) K-Tech - Spring 8.8N
435-660-88
in stock
81.02
Fork conversion KTM 250 SX (16-25) K-Tech - Spring 9.2N
435-660-92
in stock
81.02
Fork conversion KTM 250 SX (16-25) K-Tech - Spring 9.6N
435-660-96
in stock
81.02
Fork conversion KTM 250 SX (17-20) K-Tech - Cartridge kit
122-020-155-001
in stock
537.69
Fork conversion KTM 250 SX (21-25) K-Tech - Cartridge kit
122-021-155-001
on demand
537.69
Fork conversion KTM 250 SX-F (16-25) K-Tech - Spring 8.0N
435-660-80
in stock
81.02
Fork conversion KTM 250 SX-F (16-25) K-Tech - Spring 8.4N
435-660-84
in stock
81.02
Fork conversion KTM 250 SX-F (16-25) K-Tech - Spring 8.8N
435-660-88
in stock
81.02
Fork conversion KTM 250 SX-F (16-25) K-Tech - Spring 9.2N
435-660-92
in stock
81.02
Fork conversion KTM 250 SX-F (16-25) K-Tech - Spring 9.6N
435-660-96
in stock
81.02
Fork conversion KTM 250 SX-F (16-20) K-Tech - Cartridge kit
122-020-155-001
in stock
537.69
Fork conversion KTM 250 SX-F (21-25) K-Tech - Cartridge kit
122-021-155-001
on demand
537.69
Fork conversion KTM 300 SX (23-25) K-Tech - Spring 8.0N
435-660-80
in stock
81.02
Fork conversion KTM 300 SX (23-25) K-Tech - Spring 8.4N
435-660-84
in stock
81.02
Fork conversion KTM 300 SX (23-25) K-Tech - Spring 8.8N
435-660-88
in stock
81.02
Fork conversion KTM 300 SX (23-25) K-Tech - Spring 9.2N
435-660-92
in stock
81.02
Fork conversion KTM 300 SX (23-25) K-Tech - Spring 9.6N
435-660-96
in stock
81.02
Fork conversion KTM 300 SX (23-25) K-Tech - Cartridge kit
122-021-155-001
on demand
537.69
Fork conversion KTM 350 SX-F (16-25) K-Tech - Spring 8.0N
435-660-80
in stock
81.02
Fork conversion KTM 350 SX-F (16-25) K-Tech - Spring 8.4N
435-660-84
in stock
81.02
Fork conversion KTM 350 SX-F (16-25) K-Tech - Spring 8.8N
435-660-88
in stock
81.02
Fork conversion KTM 350 SX-F (16-25) K-Tech - Spring 9.2N
435-660-92
in stock
81.02
Fork conversion KTM 350 SX-F (16-25) K-Tech - Spring 9.6N
435-660-96
in stock
81.02
Fork conversion KTM 350 SX-F (16-20) K-Tech - Cartridge kit
122-020-155-001
in stock
537.69
Fork conversion KTM 350 SX-F (21-25) K-Tech - Cartridge kit
122-021-155-001
on demand
537.69
Fork conversion KTM 450 SX-F (16-25) K-Tech - Spring 8.0N
435-660-80
in stock
81.02
Fork conversion KTM 450 SX-F (16-25) K-Tech - Spring 8.4N
435-660-84
in stock
81.02
Fork conversion KTM 450 SX-F (16-25) K-Tech - Spring 8.8N
435-660-88
in stock
81.02
Fork conversion KTM 450 SX-F (16-25) K-Tech - Spring 9.2N
435-660-92
in stock
81.02
Fork conversion KTM 450 SX-F (16-25) K-Tech - Spring 9.6N
435-660-96
in stock
81.02
Fork conversion KTM 450 SX-F (16-20) K-Tech - Cartridge kit
122-020-155-001
in stock
537.69
Fork conversion KTM 450 SX-F (21-25) K-Tech - Cartridge kit
122-021-155-001
on demand
537.69