SERVICE & SUPPORT Contact. Fork tube chrome JMP for Yamaha RD 250. Top quality fork tube! High quality alternative to the original spare part! Inside diameter : 26 mm. This item fits the vehicle models listed below. Please check model and year of manufacture against your vehicle before purchasing. Yamaha RD 250 cc · 1975. Yamaha RD 350 cc · 1975. Top brand at fair prices. Fast processing of your order. Competent and fast support. Please carefully compare the item description, product images and – if available – the OEM comparison number with the required part before ordering to avoid incorrect orders. We will be happy to help you choose the correct part. Note on vehicle compatibility. We guarantee compatibility only for the vehicle models explicitly linked to this listing. Please check before purchasing whether your vehicle is listed in the vehicle assignment. For other models not listed, we cannot guarantee fit or compatibility.