Aprilia RS 660 YSS MU456 (+HPA) Shock Absorber (20-25)
The YSS MU Series is a great quality replacement aftermarket shock absorber, featuring high and low speed compression adjustment as well as rebound. The MU series are built from high quality materials, offering corrosion resistance and a weight saving when compared to the original equipment. The shock is a piggyback reservoir design, this locates nitrogen gas in a cooler environment to help maintain a more consistent level of damping .
- 45mm shock body (36mm on MZ366 models)
- 16mm piston rod (12mm on MZ362 models)
- 30 clicks high & low speed compression adjustment
- 30 clicks rebound adjustment
- Length adjustment (on most models)
- Preload adjustment
Please see the specification tab for more detailed information.
All YSS shock absorbers are covered by a two-year manufacturer’s warranty.
We have the largest range of YSS MU Series Shocks in the UK so you can be sure to find the ones you need!
| Brand | YSS |
|---|---|
| Shock Length (mm) | 407.05 |
| Shock Top Mount Type | Eye |
| Shock Top Mount Width (mm) | 30.20 |
| Shock Top Mount Bolt Hole (mm) | 13.13 |
| Shock Bottom Mount Type | Eye |
| Shock Bottom Mount Width (mm) | 30.20 |
| Shock Bottom Mount Bolt Hole (mm) | 13.13 |
| Shock Absorber Spring Internal Diameter (mm) | 73.53 |
| Shock Absorber Spring Length (mm) | 196.96 |
| Shock Spring Rate (n/mm) | 120 |
| Shock Preload Adjustment | Hydraulic (Integral) |
| Shock Rebound Adjustment | Yes |
| Shock Compression Adjustment | High & Low Speed |
| Shock Length Adjustable | Yes |
| Shock Reservoir Type | Bottom Piggyback |
| Shock Piston Diameter (mm) | 59.09 |
| Shock Rod Diameter (mm) | 21.01 |
If you have a problem, or are unhappy with your purchase, then we will put the matter right. You can return any item within 14 days and we will gladly replace the item or offer a full refund for it. All we ask is that you notify us of the fault within 7 days and send the items back unused in their original condition with all the original packaging. If we have made a mistake, we'll also refund the delivery charges. For your protection, where you are returning an item to us, we recommend that you use a recorded-delivery service. Please note that you will be responsible for the costs of returning the goods to us unless we delivered the item to you in error or the item is faulty.
Who do we use to deliver your order?
Our back office systems are fully integrated with Royal Mail, FedEx and DHL which means that the second your parcel is dispatched you will be sent an email containing your tracking details, we also aim to incorporate your mobile number within the booking process to allow the courier to send you a text message. This allows both you and us to track your parcel's every move from our door to yours!
Small items and orders such as fork spares are usually sent via Royal Mail whereas shock absorbers and forks will be sent via FedEx or DHL, all of whom make daily collections from our premises.
All our delivery costs are calculated on total weight, this includes the weight of both the products and the packaging.
Points to note
- We aim to deliver your order next day if ordered by 3pm if you use our express services
- All returns must be sent back to us at our contact address at your own cost and risk
- All delivery timescales are subject to stock availability
- Small items may be delivered by post.
- The contents of your order and your delivery postcode may determine which delivery services you will be provided
- Please note that we are unable to deliver to PO Boxes on any of our delivery services
About YSS
YSS have been manufacturing motorcycle shock absorbers for over 30 years and are one of the world’s largest aftermarket shock absorber manufacturers.
Using advanced technology and equipment at their state-of-the-art factory in Thailand and with the support from their European research and development team are continuously developing new products for an even wider range of motorcycles and continue to improve the quality of their YSS shocks.
They now produce everything from budget to race spec mono and twin shock absorbers, steering dampers, fork cartridge kits, springs, fork emulators and fork upgrade kits for a massive range of motorcycles, scooters and ATVs.
All YSS products are constructed from high quality, corrosion resistant materials and are covered by a two year manufacturers warranty.
