--- product_id: 3247490 title: "Wiseco VSK4 Premium 8.90mm OD Valve Shim kit" brand: "wiseco" price: "519.29 DT" currency: TND in_stock: true reviews_count: 13 category: "Wiseco" url: https://www.desertcart.tn/products/3247490-wiseco-vsk4-premium-8-90mm-od-valve-shim-kit store_origin: TN region: Tunisia --- # Precision ground to exact sizes Heat treated for durability Fits KTM 250F & 450F motors Wiseco VSK4 Premium 8.90mm OD Valve Shim kit **Brand:** wiseco **Price:** 519.29 DT **Availability:** ✅ In Stock ## Summary > ⚙️ Upgrade your valve game with precision and power! ## Quick Answers - **What is this?** Wiseco VSK4 Premium 8.90mm OD Valve Shim kit by wiseco - **How much does it cost?** 519.29 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/3247490-wiseco-vsk4-premium-8-90mm-od-valve-shim-kit) ## Best For - wiseco enthusiasts ## Why This Product - Trusted wiseco brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **KTM-Ready:** Specifically designed to fit most KTM 250F and 450F engines seamlessly. - • **Built to Last:** Heat-treated shims ensure unmatched durability and long service life. - • **Comprehensive Kit:** 47 different thicknesses with 5 pieces each—total control over your valve clearance. - • **Precision Perfected:** Each shim is ground to exact OEM specs for flawless valve adjustments. - • **Seamless Integration:** Pairs perfectly with Wiseco’s full valve train component lineup for ultimate performance. ## Overview The Wiseco VSK4 Premium Valve Shim Kit offers 235 precision-ground, heat-treated shims in 47 thicknesses, engineered to OEM standards for KTM 250F and 450F engines. Designed for durability and perfect fit, it’s the essential upgrade for professional-grade valve adjustments and seamless integration with Wiseco’s valve train components. ## Description 8.90 millimeter shim kits fit most KTM 250F and 450F motors. These kits are expertly manufactured to OEM specifications with optimum materials. To ensure long service life, each shim is heat treated and precision ground to exact sizes. The perfect complement to Wiseco's complete line of valve train components. 8.90 millimeter outer diameter valve shim kit contains 5 of each 47 different thicknesses. Review: Good deal on quality KTM valve shims - My daughter has a KTM 790 Duke, and it was time for a valve clearance inspection (15 K miles). If you're aware, KTM has had an issue with the camshafts on the 790/890 engines. I was curious as to the status of the cams, so I took her bike apart. Luckily, ALL of the valves were in spec, and the cam lobes looked great. We dodged the bullet with the KTM camshaft issue. That being said, i didn't use any of the shims, but I did measure both shim height and shim diameter of a number of shims, and all were within spec. So, IF you need them, you'll have good shims. If you don't need them, consider yourself lucky because that means that the engine is in good shape. Review: Works in my RS660 - I ran these shims in my 2022 Aprilia RS660 for an ASRA race weekend in the expert grid. Also the test day prior to races. They will fit just fine if you are sure you have the clearance between the top of the valve stem and the valve spring retainer. Some engines, I believe 2021 and earlier but not certain, require the OEM shims which have fillets cut out to take care of tolerance issues. Do your own research and confirm it yourself, don't guess. ## Features - 8.90 millimeter outer diameter valve shim kit contains 5 of each 47 different thicknesses - 8.90 millimeter shim kits fit most KTM 250F and 450F motors - These kits are expertly manufactured to OEM specifications with optimum materials - To ensure long service life, each shim is heat treated and precision ground to exact sizes - The perfect complement to Wiseco's complete line of valve train components ## Technical Specifications | Specification | Value | |---------------|-------| | Manufacturer | Wiseco | | Brand | Wiseco | | Model | VSK4 | | Item Weight | 8.1 ounces | | Product Dimensions | 10.5 x 7 x 1.5 inches | | Item model number | VSK4 | | Is Discontinued By Manufacturer | No | | Manufacturer Part Number | VSK4 | ## Images ![Wiseco VSK4 Premium 8.90mm OD Valve Shim kit - Image 1](https://m.media-amazon.com/images/I/71ztsJ78wlL.jpg) ![Wiseco VSK4 Premium 8.90mm OD Valve Shim kit - Image 2](https://m.media-amazon.com/images/I/71Ok9uI9QrL.jpg) ![Wiseco VSK4 Premium 8.90mm OD Valve Shim kit - Image 3](https://m.media-amazon.com/images/I/714oHfsbbiL.jpg) ![Wiseco VSK4 Premium 8.90mm OD Valve Shim kit - Image 4](https://m.media-amazon.com/images/I/71XUeqV5uvL.jpg) ![Wiseco VSK4 Premium 8.90mm OD Valve Shim kit - Image 5](https://m.media-amazon.com/images/I/21hUsrRszOL.jpg) ## Questions & Answers **Q: So, which is it? Does this kit have 5 of 47 different sizes or 3 of 23?** A: 3 each of 23 sizes. Thinnest is 1.72mm and then goes up by .04mm to 2.60mm. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Good deal on quality KTM valve shims *by C***G on March 14, 2025* My daughter has a KTM 790 Duke, and it was time for a valve clearance inspection (15 K miles). If you're aware, KTM has had an issue with the camshafts on the 790/890 engines. I was curious as to the status of the cams, so I took her bike apart. Luckily, ALL of the valves were in spec, and the cam lobes looked great. We dodged the bullet with the KTM camshaft issue. That being said, i didn't use any of the shims, but I did measure both shim height and shim diameter of a number of shims, and all were within spec. So, IF you need them, you'll have good shims. If you don't need them, consider yourself lucky because that means that the engine is in good shape. ### ⭐⭐⭐⭐⭐ Works in my RS660 *by R***N on June 13, 2025* I ran these shims in my 2022 Aprilia RS660 for an ASRA race weekend in the expert grid. Also the test day prior to races. They will fit just fine if you are sure you have the clearance between the top of the valve stem and the valve spring retainer. Some engines, I believe 2021 and earlier but not certain, require the OEM shims which have fillets cut out to take care of tolerance issues. Do your own research and confirm it yourself, don't guess. ### ⭐⭐⭐⭐ Used these instead of the BMW shim kit for the ... *by R***K on September 24, 2014* Used these instead of the BMW shim kit for the S54 engine valve shims. These are way cheaper. Time will tell if they are comparable quality, but from my research, other people are claiming that they are. ## Frequently Bought Together - Wiseco VSK4 Premium 8.90mm OD Valve Shim kit - REXBETI Digital Micrometer, Professional Inch/Metric Measuring Tools 0.00005"/0.001 mm Resolution Thickness Gauge, Protective Case with Extra Battery - Stainless Steel Feeler Gauge Dual Marked Metric and Imperial Measuring Tool(0.005/0.127-0.02/0.508 mm, 16 Blades) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/3247490-wiseco-vsk4-premium-8-90mm-od-valve-shim-kit](https://www.desertcart.tn/products/3247490-wiseco-vsk4-premium-8-90mm-od-valve-shim-kit) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-08-03*