Anbieter: Sirris
Sirris F43 Fork CMX Tune: E Ride Pro SR
Beschreibung
Take your E Ride Pro SR to the next level with the Sirris F43 CMX Fork. This 220mm travel fork is engineered without compromise specifically for the E Ride Pro SR for high-performance, aggressive riding. The CMX Tune (Compact Motocross) paired with the race-proven F43 platform brings elite-level suspension tech to the electric dirt bike world.
140 lbs - 180 lbs (Medium = 4.0/4.0 springs)
180 lbs - 220 lbs (Heavy = 4.4/4.0 springs)
Fork spring rates listed above are left side/right side
See Fork & Shock Tuning Recommendations Chart below.
Sirris F43 CMX Fork Features
- 220mm Travel — (17mm more than stock) adds cushioning for aggressive riding
- Tool-Free Compression Adjusters — for quicker changes during mid ride without any tools needed
- 178mm Fork Spacing — allows unlimited tire selection from aggressive knobby to supermoto treads
- Drop Clamp Option for 21" Wheels — allows for fitment of 21” wheel by raising the front end an additional 25mm while retaining 220mm travel (raising the front end maintains balance of the bike if paired with a longer shock that raises the rear)
- Scalloped Clamps — for aggressive, trick styling
- Direct Mount Stem (DM Ready) — lightweight billet clamps with DM stem designed for hassle-free setup (no extra parts needed)
- Axle & Brake Mounts — ultra-stiff and configurable
- Axle and drop out assembly promotes front-end feel and steering precision
- Universal lugs, custom axle spacers and new brake mounts allow for easier stocking, and allows rider greater wheel and brake options
- Replaceable caliper mount brackets allow for caliper upgrades
- Symmetrical Closed Cartridge Dampers — specifically tuned for each model, and fully tunable for spring rate and damping for balanced performance
- Motorcycle-Style Top Cap — increases ability to tension steering bearings and retain torque
OEM E Ride Pro SR Compatibility
The triple clamps and guards perfectly align with the E Ride Pro SR fairing and cable routing. Additionally, the CMX F43 Fork upgrade is compatible with the E Ride Pro SR stock display, fender, and brake as well.
Shock Suspension Pairing
For optimal bike performance, we recommend using an EXT Arma Shock, Ohlins TTX22M with EXT Spring, or equivalent. Spring Weights: Medium Tune (500 lbs) / Heavy Tune (550 lbs) - see tuning recommendations below
F43 CMX Fork Specs
| Architecture | Upside down fork |
| Travel | 220mm |
| Free length | 775mm (drop clamp option adds another 25mm of extended length) |
| Fork Spacing | 178mm - allows for unlimited tire choice (dirt or street) |
| Fork weight | 4 kg per leg (driven by sturdy construction required for the forces and speeds encountered when pushing these bikes to their limits without compromising performance) |
| Stanchions | 43mm - high tensile steel with hard chrome |
| Outer tubes | Seamless 7050 aluminum, type 3 hard anodized coating |
| Drop outs | 6061 aluminum, type 2 anodized coating Replaceable caliper mount brackets allow for caliper and wheel upgrades |
| Axle | Ultra-high tensile hard chromed axle increases steering precision and confidence |
| Triple clamps | Billet 6061 aluminum, type 2 anodized coating, 2 color options (blue, black) Optional drop clamp allows for 21” front wheel conversion |
| Steer tube | Seamless 7050 aluminum, type 2 anodized coating |
| Damping | Symmetrical, adjustable closed cartridge with spring backed modified IFP |
| Damper bodies | Seamless 7050 aluminum, type 3 hard anodized coating |
| Rebound | Dual side high tensile steel spring, adjustable |
| Adjusters | External tool-free compression, rebound adjustment (rebound adjusted using tool) |
| Seals | NOK MX seals |
| Bushings | Daido MX bushings |
| Guards | High impact PP, 210° wraparound |
CMX Tuning Details & Rider Weight Ranges
Sirris offers 2 weight ranges to choose from when selecting your CMX Tune F43 Fork. Listed weight ranges are body weight with 15 lbs of riding gear. Weights of upgrades (e.g. battery, controller, motor) need to be added to rider weight.
| FORK Recommendations | Medium | Heavy |
|---|---|---|
| Rider Weight (lbs) (No Gear) | 140-180 | 180-220 |
| Spring Rate (N/mm) | 4.0/4.0 | 4.4/4.0 |
| Fork Height in Upper Clamp (mm) | 8 | 8 |
| Compression Setting | 18 | 17 |
| Rebound Setting | 18 | 12 |
| Preload Setting (mm of preload R and L fork legs) | 5/5 | 5/5 |
| Oil Volume (Bath Oil) | 100cc | 120cc |
| Oil Weight* (bath/cartridge) | 20/5 | 20/5 |
| Headset Spacer 1mm thick washer beneath seal, PN 430-38-017 | None | |
| Steerer Spacer 5mm thick above top clamp / beneath top cap | 430-38-018 x4 | |
| Caliper Bracket | 430-22-034, 99.5mm | |
| Wheel Spacers | 430-28-016 x2 | |
| SHOCK (EXT Arma) Recommendations | Medium | Heavy |
|---|---|---|
| Compression Setting | LSC9/HSC7 | LSC9/HSC7 |
| Rebound Setting | 7 | 5 |
| Spring Rate (N/mm, lb/in) | 88, 500 | 96, 550 |
| Preload Setting (mm) | 4.5 | 3 |
SETTINGS: Settings are number of clicks from the closed position (full clockwise). Once they are in the closed position, back them out (counter-clockwise) according to the number of clicks indicated in the chart above to get you to factory settings.
CMX Tune Starting Point:
- Assuming neutral riding position, and 15 lbs gear
- Weights of upgrades (battery, controller, etc) to be added to rider weight
- Riders close to a weight cut off need to adjust preload to compensate
- Very aggressive/pro riders to consider +1 weight class and drop preload to get sag. Especially if in the upper range.
- Rider preference and riding conditions may require a different setup
Example:
- 160 lb rider without riding gear, 20 additional lbs with upgraded controller/battery
- Weight calculation 160+20=180
- Aggressive rider = Heavy tune with low preload
- Relaxed rider = Medium tune with high preload
Easy Direct Mount Setup Upgrade your stock E Ride Pro SR easily with the direct mount front suspension system. No additional modifications or parts are required.
5-Hour Break-In Period Recommendation The Sirris F43 Fork will break-in during the first 5 hours of use with significant improvements in friction. We recommend that you don’t make significant changes to clicker positions or valving until after the 5-hour break-in period. Sirris F43 CMX Fork Owner’s Guide (PDF) ›
