Suzuki GSX-8S mods & upgrades
The GSX-8S shares its engine, frame, brakes and electronics with the GSX-8R, so most bolt-on parts are listed for both bikes.
- Engine776 cc DOHC parallel twin, 270° crank, 84 × 70 mm, 12.8:1
- Power~82 hp (61 kW) claimed @ 8,500 rpm
- Wet weight445 lb (202 kg) claimed curb
- Seat height31.9 in (810 mm)
- Front endKYB 41 mm inverted fork; Nissin radial 4-piston calipers, twin 310 mm discs
Parts that fit the GSX-8S
72 parts in 14 categories, with typical prices — verify fitment for your exact year and market.
| Part | Tier | Typical price | Fitment | Add to sheet |
|---|---|---|---|---|
| Exhaust3 fitSuzuki's catalytic converter sits in the mid-pipe, followed by an under-chassis chamber and a short right-side muffler. Akrapovič (Racing Line 2023–2026; GP and homologated systems), Arrow (Works homologated with catalytic converter, Works racing, Competition EVO), LeoVince (LV-14 R, LV Race) and Yoshimura (AT2) list systems. Homologated systems include the cat; Akrapovič's Racing Line and GP systems, LeoVince's systems and Arrow's Competition EVO are listed as not street-legal. | ||||
| Arrow Competition full system | premium | $2,300 | fits: verified · 2024–252026 not listed | Add to sheet |
| Akrapovič Racing Line full system | premium | $1,560 | fits: verified · 2023+Titanium or stainless | Add to sheet |
| Toce Razor Tip full system | mid | $1,200 | fits: verified · 2023+ | Add to sheet |
| Tune7 fitTST's WORX tunes cover the 8S 2023–2026 (North American ECUs): Stage 1 unrestricts the throttle valve in mode A and disables the O2, PAIR, front-wheel-speed and EVAP fault codes for aftermarket full systems; Stage 2 and 3 need TST's intake or airbox. TST labels them closed-course only. Dynojet lists a Power Commander 6 for the 8S. | ||||
| Woolich Racing flash kit + license | premium | $500 | fits: verified · 2023–24Shared GSX-8S/R/TT definition | Add to sheet |
| Sprint Filter P08 air filter | premium | $120 | fits: verified · 2023+SM245S | Add to sheet |
| Dynojet Power Commander 6 | mid | $480 | fits: verified · 2023–26 | Add to sheet |
| Vcyclenut mail-in ECU flash | mid | $350 | fits: verifiedShared GSX-8S/R/T flash; no year limit given | Add to sheet |
| Moore Mafia mail-in ECU flash | mid | $340 | fits: verified · 2023–25 | Add to sheet |
| DNA performance air filter | mid | $110 | fits: verified · 2023–24P-S8E23-01 | Add to sheet |
| 2 Wheel DynoWorks mail-in ECU flash | budget | $320 | fits: verifiedShared GSX-8 service; no year limit given | Add to sheet |
| Suspension5 fitKYB 41 mm inverted fork with 5.1 in travel and a KYB link-type shock with a cam-style preload adjuster (Suzuki, 2023–2024 pages). Öhlins' NIX30 Street kit is the 8S-specific (Kayaba fork) part; don't buy the 8R's Showa kit. Öhlins' STX 46 shock lists both bikes. | ||||
| Öhlins NIX30 fork cartridge kit | premium | $1,300 | fits: verified · 2023–26 | Add to sheet |
| Nitron R1 rear shock | mid | $810 | fits: verified · 2023–25Standard or 35 mm lower | Add to sheet |
| Andreani Misano fork cartridge kit | mid | $770 | fits: verified · 2024+KYB 41 fork | Add to sheet |
| YSS rear shock | budget | $500 | fits: verified · 2023Later years not listed | Add to sheet |
| HyperPro progressive fork springs | budget | $200 | fits: verified · 2023–25 | Add to sheet |
| Brakes6 fitNissin radial four-piston calipers on twin 310 mm discs, and a 240 mm rear disc with a Nissin single-piston caliper; ABS (Suzuki), the same as the 8R. Spiegler lists brake-line kits for the 8S 2023–2024. | ||||
| Brembo 19 RCS Corsa Corta master cylinder | premium | $690 | fits: reported · 2023+Twin discs, four-piston calipers | Add to sheet |
| Brembo 19 RCS radial master cylinder | premium | $600 | fits: reported · 2023+Twin discs, four-piston calipers | Add to sheet |
| Spiegler stainless front and rear brake line kit | premium | $250 | fits: verified · 2024+ABS kit; an extended-length front master-cylinder line is also sold alone | Add to sheet |
| GBrakes (formerly Galfer USA) stainless front brake line kit | mid | $100 | fits: verified · 2023–245-line kit; 2025+ not listed | Add to sheet |
| EBC Double-H sintered pads (per caliper) | budget | $50 | fits: verified · 2023–24FA347HH; 2025+ not listed | Add to sheet |
| Motul RBF 600 racing brake fluid | budget | $25 eBay — $24.99 checked Oct 14 (opens in new tab) | fits: verifiedNon-silicone synthetic racing brake fluid for hydraulic brake and clutch systems; exceeds DOT 3 and 5.1. | Add to sheet |
| Tires & Wheels11 fitDunlop Roadsport 2, 120/70ZR17 (58W) front on a 17 × 3.5 in rim and 180/55ZR17 (73W) rear on a 17 × 5.5 in rim (Suzuki), the same as the 8R. | ||||
| Pirelli Diablo Supercorsa SP V4 set | premium | $560 | fits: verified · 2023+120/70 front, 180/55 rear | Add to sheet |
| Michelin Power Cup 2 set | premium | $520 | fits: verified · 2023+120/70 front, 180/55 rear | Add to sheet |
| Bridgestone Battlax RS12 set | mid | $510 | fits: verified · 2023+120/70 front, 180/55 rear | Add to sheet |
| Michelin Power GP2 set | mid | $500 | fits: verified · 2023+120/70 front, 180/55 rear | Add to sheet |
| Bridgestone Battlax S23 set | mid | $460 | fits: reported · 2023+120/70 front, 180/55 rear | Add to sheet |
| Michelin Power 6 set | mid | $460 | fits: verified · 2023+120/70 front, 180/55 rear | Add to sheet |
| Pirelli Diablo Rosso IV set | mid | $440 | fits: verified · 2023+120/70 front, 180/55 rear | Add to sheet |
| Continental ContiSportAttack 5 set | mid | $420 | fits: verified · 2023+120/70 front, 180/55 rear | Add to sheet |
| Metzeler Sportec M9 RR set | mid | $400 | fits: reported · 2023+120/70 front, 180/55 rear | Add to sheet |
| MOTO-D single-temp tire warmers | mid | $400 | fits: verified · 2023+120/70 front, 180/55 rear | Add to sheet |
| Dunlop Sportmax Q5 set | budget | $510 | fits: verified · 2023+120/70 front, 180/55 rear | Add to sheet |
| Levers7 fitASV's F3 and C5 sport levers list the GSX-8S 2023–2026 and GSX-8R 2024–2026. R&G lists a brake-lever guard for the 8S. Puig lists a clutch-lever mount for the 8S/8R. | ||||
| ASV C5 folding lever pair | premium | $300 | fits: verified · 2023–26 | Add to sheet |
| Puig 3.0 lever pair | premium | $240 | fits: verified · 2023–26 | Add to sheet |
| Bonamici EVO brake lever guard | premium | $230 eBay — $258.30 checked Oct 14 (opens in new tab) | fits: reportedSold without adapter; needs a Bonamici adapter chosen by bar-end inner diameter (13–21 mm) or by bike | Add to sheet |
| CRG RC2 lever pair | premium | $220 | fits: reported · 2023–26Brake lever only | Add to sheet |
| Pazzo shorty lever pair | mid | $200 | fits: verified · 2023–26 | Add to sheet |
| Womet-Tech Evos shorty lever pair | budget | $110 | fits: verified · 2023+ | Add to sheet |
| R&G moulded lever guard | budget | $70 | fits: verified · 2023+MLG0012 | Add to sheet |
| Rearsets3 fitWoodcraft's complete kits list the 8S/8R in standard and GP shift and reuse the OEM quickshifter; Gilles Tooling's AS31GT3 lists 2023–2024; TST's riser brackets raise the stock pegs. | ||||
| Bonamici rearsets | premium | $670 | fits: verified · 2023–26 | Add to sheet |
| Sato Racing rearsets | premium | $600 | fits: verified · 2023+ | Add to sheet |
| Woodcraft complete rearset kit | mid | $530 | fits: verified · 2023+ | Add to sheet |
| Clip-ons & Throttle2 fit | ||||
| Domino A450 race grips | budget | $30 eBay — $29.95 checked Oct 14 (opens in new tab) | fits: verifiedUniversal 22 mm (7/8 in) open-end race grips, 120–125 mm, for twist throttles | Add to sheet |
| ProGrip 717 grips | budget | $18 eBay — $17.98 checked Oct 14 (opens in new tab) | fits: verifiedUniversal open-end race grip, 122 mm long, fits 22-25 mm bars; the RA version is 125 mm | Add to sheet |
| Crash Protection9 fitWoodcraft frame and axle sliders and cover protectors (2023–2024), TST frame sliders (8S 2023) and water-pump cover protector, Womet-Tech fork sliders and bar ends, GB Racing covers and swingarm spools (2023–2026) and Puig R19 and Pro 2.0 frame sliders (2023) all list the 8S. Puig also lists an engine spoiler for the 8S 2023–2024. | ||||
| GB Racing engine cover set | premium | $320 | fits: verified · 2023–26 | Add to sheet |
| Evotech Performance radiator guard | premium | $110 | fits: verified · 2023+ | Add to sheet |
| R&G Aero frame sliders | mid | $140 | fits: verified · 2023+ | Add to sheet |
| Woodcraft frame sliders (with pucks) | mid | $85 | fits: verified · 2023–26Shared GSX-8 kit; no cutting | Add to sheet |
| T-Rex Racing engine case covers | budget | $140 | fits: verified · 2023–26 | Add to sheet |
| Shogun no-cut frame sliders | budget | $70 | fits: verified · 2023–25 | Add to sheet |
| R&G fork protectors | budget | $60 | fits: verified · 2023+APEX version only | Add to sheet |
| R&G bar end sliders | budget | $55 | fits: verifiedNo year limit given | Add to sheet |
| Vortex swingarm spools | budget | $20 | fits: reported · 2023–26 | Add to sheet |
| Tail Tidy & Billet5 fitYoshimura's V2 kit lists the 8S/8R 2023–2026, New Rage Cycles lists the 8S 2023–2026, Puig lists kits for the 8S, and TST's Elite-1 kits list the 8S 2023 in high and low mount. TST also lists an integrated LED tail light. | ||||
| Evotech Performance tail tidy | premium | $230 | fits: verified · 2023+ | Add to sheet |
| New Rage Cycles fender eliminator | mid | $180 | fits: verified · 2023+Shared with the GSX-8R | Add to sheet |
| R&G tail tidy | mid | $160 | fits: verified · 2023+Shared with the GSX-8R | Add to sheet |
| TST LED integrated tail light | mid | $140 | fits: verified · 2023+Shared with the GSX-8R | Add to sheet |
| TST Elite-1 fender eliminator | mid | $85 | fits: verified · 2023+Shared with the GSX-8R | Add to sheet |
| Bodywork4 fitWindscreen: Puig lists New Generation Sport and Touring windscreens for the 8S 2023. The 8S has no full fairing. | ||||
| Armour Bodies Pro Series race bodywork | mid | $1,060 | fits: reported · 2023–26Supersport kit for the naked bike | Add to sheet |
| Puig New Generation sport screen (naked bikes) | mid | $160 | fits: verified · 2023–26 | Add to sheet |
| TechSpec Snake Skin tank grips | budget | $80 | fits: reported · 2023–26Shared GSX-8S/8R kit, 2023–26 | Add to sheet |
| Stompgrip tank grip kit | budget | $65 | fits: verified · 2024–26Not 2023 | Add to sheet |
| Quickshifter1 fitA bi-directional quickshifter is standard (Suzuki). Woodcraft's rearsets reuse the OEM quickshifter, so there is nothing to re-buy. | ||||
| Healtech iQSE quickshifter (with harness) | mid | $370 | fits: verified · 2023–26QSH-F2A | Add to sheet |
| Drivetrain4 fitStock is a 525 O-ring chain with 118 links, 17T front and 47T rear (Suzuki spec; SprocketCenter lists the sprocket sizes). Driven lists a 520 kit and Vortex a 520 aluminum rear sprocket for the 8S/8R 2023–2026. | ||||
| Renthal Ultralight rear sprocket | mid | $100 | fits: verified · 2023–26520 or 525 pitch | Add to sheet |
| Driven aluminum rear sprocket | mid | $85 | fits: verified · 2023–25520 or 525 pitch | Add to sheet |
| Superlite steel rear sprocket | mid | $60 | fits: verified · 2023–26RSX steel, 520 or 525 | Add to sheet |
| Vortex steel front sprocket | budget | $35 | fits: reported · 2023–26520 or 525 pitch | Add to sheet |
| Electronics5 fitSuzuki Intelligent Ride System: three drive modes (A/B/C), traction control with three levels plus off, ride-by-wire, Easy Start, Low RPM Assist and a 5-inch TFT. Suzuki lists no IMU-based aids. | ||||
| AiM MXS Strada race dash | premium | $1,400 | fits: reportedUniversal dash; kits ship with a 14-pin CAN or OBD CAN+K harness; AiM claims 2,000+ supported ECUs | Add to sheet |
| AiM Solo 2 DL lap timer | premium | $850 eBay — $899.00 checked Oct 14 (opens in new tab) | fits: reportedUniversal GPS lap timer; the DL adds ECU logging via CAN/RS232/K-line; dedicated bike kits available | Add to sheet |
| AiM Solo 2 lap timer | mid | $480 eBay — $499.00 checked Oct 14 (opens in new tab) | fits: verifiedUniversal GPS lap timer; no ECU connection | Add to sheet |
| Starlane Stealth-5 lap timer | mid | $460 eBay — $465.40 checked Oct 14 (opens in new tab) | fits: verifiedWires to the bike's 12 V battery (cable supplied) or an optional battery case; mounts included | Add to sheet |
| Healtech Brake Light Pro flasher module | mid | $65 | fits: verified · 2023–26BLP-U01 | Add to sheet |
Some links may earn Unstocked a commission at no cost to you. Prices shown are typical street prices — always verify fitment and price at the retailer. Model-specific parts (exhausts, rearsets, bodywork) can run 2–3× between bikes — the sheet shows a typical figure.
What the GSX-8S runs stock
| Part | What it came with | Years |
|---|---|---|
| Exhaust | Stock exhaust system stainless 2-into-1 system with a dual-stage catalytic converter inside the mid-pipe, an under-chassis chamber and a short right-side muffler | All years |
| Suspension | KYB 41 mm inverted fork 41 mm inner tubes with 5.1 in (130 mm) travel; Suzuki lists no external adjusters | All years |
| Suspension | KYB link-type monoshock cam-style spring preload adjuster; 5.1 in (130 mm) rear wheel travel | All years |
| Brakes | Nissin radial-mount 4-piston calipers twin 310 mm front discs; 240 mm rear disc with a Nissin single-piston caliper; ABS standard | All years |
| Tires & Wheels | Dunlop Roadsport 2 120/70ZR17 (58W) front · 180/55ZR17 (73W) rear on 17 × 3.5 in and 17 × 5.5 in cast wheels | All years |
| Quickshifter | Bi-directional Quick Shift up/down quickshifter standard on every year | All years |
| Drivetrain | 525 O-ring chain, 118 links 6-speed, wet clutch with Suzuki Clutch Assist System; 17T front and 47T rear sprockets per SprocketCenter's stock listing | All years |
| Electronics | Suzuki Intelligent Ride System: three-mode Drive Mode Selector, traction control (three levels plus off), ride-by-wire, Easy Start, Low RPM Assist, 5-inch color TFT | All years |
From the manufacturers' press material; entries marked reported come from other sources. Check against your exact model year. Stock parts for every bike →
Why mod a GSX-8S
The GSX-8S shares its engine, frame, brakes and electronics with the GSX-8R, so most bolt-on parts are listed for both bikes. The KYB fork (the 8R has a Showa SFF-BP), the tapered bar and the lack of a fairing are 8S-specific.
GSX-8S street mods, in order
Fit a fender eliminator
Yoshimura's V2 kit (with LED signals) lists the GSX-8S/8R 2023–2026; New Rage Cycles lists the 8S 2023–2026 and Puig lists kits for the 8S. TST's Elite-1 kits list the 8S 2023 in high and low mount.
Add protection
Woodcraft (frame sliders, axle sliders, cover protectors) and TST (frame sliders, water-pump cover protector) list the 8S; Puig lists R19 and Pro 2.0 frame sliders for the 8S 2023, and GB Racing lists 8S covers for 2023–2026. Womet-Tech lists fork sliders and bar ends.
Fit levers, a windscreen and grips
ASV's F3 and C5 sport levers list the 8S 2023–2026, and R&G lists a brake-lever guard. Puig lists New Generation Sport and Touring windscreens for the 8S 2023. TechSpec lists Gripster tank grips for the 8S 2023 and 8R 2024.
Choose an exhaust by what it replaces
Suzuki puts the catalytic converter inside the mid-pipe; the exhaust then flows into an under-chassis chamber and a short right-side muffler. Akrapovič and Arrow list homologated systems that include a catalytic converter; Akrapovič's GP and Racing Line systems and LeoVince's LV-14 R and LV Race are listed as not street-legal. Yoshimura's AT2 is 6.5 lb lighter than stock (Yoshimura via TST).
Flash if you fit a full system
TST's WORX Performance ECU tune (mail-in) covers the 8S 2023–2026: it unrestricts the throttle valve in mode A and disables the O2, PAIR, front-wheel-speed and EVAP fault codes. TST labels it closed-course only and says it is written for aftermarket full systems. Dynojet lists a Power Commander 6 for the 8S.
Upgrade the suspension
Suzuki lists a cam-style preload adjuster on the shock and no fork adjusters. Öhlins lists a NIX30 Street cartridge kit for the 8S (Kayaba fork) and an STX 46 shock for both bikes; TST sells Nitron's NTR R3 shock. Start with springs for your weight.
GSX-8S track build, in order
Buy tires in the stock sizes
Stock is Dunlop Roadsport 2 in 120/70ZR17 on a 17 × 3.5 in rim and 180/55ZR17 on a 17 × 5.5 in rim (Suzuki), so track tires in those sizes need no wheel change.
Refresh the brake consumables
The Nissin radial four-piston calipers are the same as the 8R's. Add pads, fluid, a braided line (Spiegler lists brake lines for the 8S 2023–2024) and a lever guard.
Spring the suspension for your weight
Fit fork springs or the Öhlins NIX30 Street cartridge kit (the 8S kit, not the 8R's Showa kit) and a shock (Öhlins STX 46, Nitron NTR R3) matched to your weight and pace.
Move the controls
Woodcraft lists complete rearsets for the 8S/8R in standard and GP shift that reuse the OEM quickshifter; Gilles Tooling lists AS31GT3 rearsets (2023–2024); TST lists riser brackets. TechSpec lists tank grips.
Prepare the bike for track use
GB Racing lists 8S covers for 2023–2026 and swingarm spools, Woodcraft lists axle sliders, and Woodcraft and Armour Bodies list superbike seat-base and tail parts.
Regear, then add a full system and flash
Stock is a 525 chain with a 17T front and 47T rear sprocket. Driven lists a 520 kit and Vortex a 520 aluminum rear sprocket for the 8S/8R 2023–2026. Pair a full system with the TST flash.
GSX-8S fitment by year (GSX-8S)
- GSX-8S2023–present
One hardware spec so far: the 776 cc twin in a steel backbone frame with a steel subframe and aluminum swingarm, a KYB 41 mm inverted fork with no adjusters listed and a preload-adjustable KYB link-type shock (Suzuki's 2023–2024 pages), Nissin radial four-piston calipers, a bi-directional quickshifter and a 5-inch TFT; 445 lb (202 kg) curb. Homologated for MotoAmerica Twins Cup in January 2024 alongside the 8R. Suzuki's 2025, 2026 and 2027 pages list the same specs, so every year shares one parts search; NHTSA lists no recalls on the 8S as of September 2026.
GSX-8S gotchas — read before buying
GSX-8S parts interchange
Reported by riders; verify before buying. Full chart → See also: Suzuki GSX-8R.
- GSX-8R: frame, engine, brakes, wheels and electronics are shared, and Woodcraft rearsets, TST tune and protection, ASV levers, Yoshimura V2 and Öhlins' STX 46 all list both bikes. Fork internals, bars and fairing parts don't cross (vendor-listed and reviewer-reported).
- GSX-8T and GSX-8TT (2026): Suzuki lists them on the 8S family; Puig lists front axle sliders for the 8S, 8R and 8TT 2023–2026. Verify anything else per listing.
- V-Strom 800/800DE: GB Racing lists engine covers for the GSX-8R/S and V-Strom 800DE together, so engine-adjacent parts cross; chassis parts don't.
Suzuki GSX-8S mods FAQ
What are the first mods for a GSX-8S?
Tail tidy and flush signals, frame sliders and case covers, levers and a windscreen are the usual first round; the protection, lever and tail parts are listed for both the 8S and 8R. Suspension sprung for your weight is the first mod that changes how it rides; the exhaust changes how it sounds.
Does a GSX-8S exhaust need a tune?
Vendors disagree. Akrapovič's listing says no remap is required, while TST says removing the stock exhaust makes the 8S/8R run lean and set fault codes and sells a flash for it. Suzuki's cat is in the mid-pipe, so check whether a listing replaces it.
GSX-8S or GSX-8R for modding?
Either works, because the bikes share most bolt-on parts. The 8S has no fairing, a tapered bar and a KYB fork; the 8R adds a full fairing, separate handlebars and a Showa SFF-BP fork, and Öhlins lists a different cartridge kit for each (NIX30 Street for the 8S, NIX30 Supersport for the 8R).
Is the GSX-8S fork adjustable?
Suzuki lists no fork adjusters and a preload adjuster on the shock only. Öhlins' NIX30 Street kit, made for the 8S's Kayaba fork, adds compression and rebound adjustment, and Öhlins' STX 46 shock lists both bikes.
Are there recalls on the GSX-8S?
None on the 8S as of September 2026. The one GSX-8 recall (NHTSA 24V-081, missing chain rivets) covered 360 GSX-8Rs from the 2024 model year. Suzuki files both bikes as 'GSX800' at NHTSA, so search by VIN rather than model name.