TurboBrake HB427-4S 4-Piston Brake Calliper

• TurboBrake HB427-4S is eSN's contemporary 4-Piston hydraulic calliper.
• Reliable drop-in replacement for most common stock callipers, offering better performance than traditional 2-piston callipers.
• 4S designation = 4-Piston Standard class (4M = moto). This is a contemporary calliper with similar performance of Logan, Zoom and NUTT with similar "footprint" for clearance. This HB427-4S is essentially the 4-piston version of the HB427-H which is the stock calliper on most Dragon (Langfeite) models including Predator and later models of Cyclone, Predator, Lightning & Hurricane.

• Available in Left or Right orientation. This orientation defines the location of the hydraulic line termination as you look at the outer side of calliper mounted on scooter. For example, a calliper with right orientation, sitting on top of swing arm will suit rear right hand side of scooter & front left hand side. It will also suit front right hand side if located "behind the fork". See notes for further info, as a general guide:
  • NAMI = Left.
  • Kaabo Warrior = Right with exception to the GTR which adopts Left at front.
  • Kaabo Mantis 8/10 = Left.
  • Teverun Fighter = Left.
  • Dragon Hurricane = Right orientation.
• Supplied with Long or Short hydraulic line (hose), industry standard BH59 type with TEKTRO style barb.
  • Short, for front is 1.28 meters length.
  • Long, for rear is s 2.1 meters length.

Lengths are derived from that of NAMI Logan 4-Piston (Burn-e) which is the most generous of all common 11" wheel scooters.

Hose terminates on the outside of calliper rather the inside adopted on HB427-4M and Logan 4-piston to help clear tyre sidewall. The non-banjo design reduces points-of-failure and exposure of hose to damage where it terminates with the lever.

• Supplied with factory fitted Logan 4-Piston type pad (all-metal, non finned). Will not support the slightly narrower pads of NUTT YD-03 cooling enhanced (resin/ceramic) due to heatsink conflict (heatsink would need be shaved back). The Logan 4-Piston style pad is available in 4 compounds.
• Includes 7-piece kit comprising of BH59 olive (bushing), common M8 (0.75 pitch) compression nut, cover (hood/boot), pair of M6 x 18mm socket head bolts with washers to secure bracket to swing arm and two o rings for the factory-fitted TEKTRO barb (often o-ring is pre-fitted to barb).
• Unbranded. A small quantity of the Teverun branded (7260R V1 spare) are also available (without brackets, with heat sink pads).
• Apply coupon code TURBOBRAKE-SET at checkout for 14% discount on cart of complete set comprising two callipers and two levers.

Notes:

1. Typically paired with the TurboBrake Lever or the higher end CNC Ball Bearing Edition lever.
2. Examples of orientation adopted on popular makes/models (always check your own build):
   1. NAMI has Left orientation.
      Rear is on the left hand side above swing arm, hence Left. Front is on the right hand above swing arm on Burn-E and Klima, and on left behind the "forks" on Blast which are all Left orientation.
      
      
      Image: Ride & Glide
   2. Kaabo Wolf Warrior Series has Right orientation with exception for GTR front.
      
   3. Dragon Hurricane has Right orientation.
      Rear is on the right hand side above swing arm, hence Right. Front is on the right hand side, behind the "forks" hence right.
      
3. Consider adding a TurboBrake Brake Bleed Adaptor: This specific sized adaptor is not included in the common bleed kits. This adaptor suits all TurboBrake HB427 series brakes (including the Yellow Dragon branded callipers) and is identical to that in the Teverun bleed kit. This adaptor is long and skinny, with only a small amount of thread on the end of the adaptor forming connection with the TurboBrake lever (approx ~1mm of thread bites as the O ring compresses, apply force in turn). eSN recommends having two adaptors for full bleed top and bottom. Without these adaptors you would need resort to augmenting the common bleed kit adaptors with O rings and/or plumbers tape.
   
   
4. The IS Mount bracket (adaptor) mounts the calliper to the scooter. The 160mm (rotor size) is adopted using industry standard convention, however not all makes/models of eScooters adopt this convention. Often eScooters will require a different size bracket to the standard convention to seat the calliper appropriately relative to the rotor. There are two common types:
   • F-180 R-160 bracket (supplied with HB427-4S left long & right long):
     Taller bracket: 22 & 22mm offset (height).
     This bracket is adopted on NAMI Burn-e, Kaabo Wolf Warrior 11/GT Series and Factory Teverun Fighter 11 front/rear. Note some Wolf Warrior's are observed with a 19 & 19 ("no washer") bracket.
   • F-160 R-140 bracket (supplied with HB427-4S left short, right short):
     Shorter bracket: 11mm & 7mm offset (height).
     Adopted on NAMI Klima. Near identical to that of the Kaabo Wolf Warrior King/GT rear (Wolf is precisely observed as 12/7).
     
     Teverun branded callipers are without brackets. If a different bracket is needed, add comment at checkout indicating which of the two above desired. Note, as mentioned the industry standard designation may not necessarily relate to the rotor size of your specific make/model. For example, Warriors have 160mm rotors and use a F-160 R-140 bracket on rear.
     
     If renewing, typically existing brackets are used as TurboBrake HB callipers have similar shape and pad placement as stock eScooter callipers. If special purpose bracket is or spacers are required (including for rotor size uplift) consider some of these picks from AliExpress:
     
     MUQZI Brackets. The B(IS)
     The B (IS, International Standard) "004" F-203 R-180 is an alternative to F180-R160. Used when fitting larger rotors as shifts the calliper position laterally (horizontal) for appropriate angle.
     The A (PM, Post Mount) "005" F-203 R-203 & "006" F-180 R-180 stacks on top of B(IS) brackets. "005" also available here.
     
     
     ABS Spacers from Grey Eteri Store and HUJI Store make a tidy finish compared to stacking washers. Use M6.2 internal diameter for the M6 bolts, 9mm external diameter. Similar to the M5.2's in the TurboTight NAMI Klima Fender Spacer Kit. Alternatively you could use 6x8 or 6x10 copper sleeve from AN DE LI Hardware Fitting Store or U Officer Store.
     
     
5. Image on left (or top) shows the HB427-4M fitted to rear of NAMI Klima with the stock F-180 R-140 bracket and stock 140mm rotor. A slight shave to the swing arm brake mount plate was undertaken to accommodate the calliper body. By way of comparison, image on right (lower) shows Magura MT5e on NAMI Burn-e with aftermarket 160mm (stock size) rotor. Magura callipers typically require quite an orchestrated ensemble of bracketing. In this instance a PM bracket is stacked on top of the IS Mount (piggy backed). This shifts the placement to accommodate Magura design. In the Magura photo you can see that one of the pistons is not seated appropriately to align the pad to the rotor (it is too high). Ideally that bracket should be shaved down and/or a more appropriate bracket(s) and washers assembled. Magura are troublesome as they are further removed in placement than typical stock eScooter callipers
   
   
6. Image below shows the hydraulic line (hose) supplied with TurboBrake callipers to connect to the brake levers that adopt BH59/TEKTRO fittings such as TurboBrake Levers. This calliper includes the type on left, identical to the TurboBrake 2-Piston HB427-H hose. This is a TEKTRO style fitting (hence the inclusion of BH59 insert (needle/barb) with washer). The included 7-piece kit includes the O ring washer shown fitted on image below. The compression nut adopts the common thread of M8 (0.75 pitch) adopted by most eScooter brake levers, allowing connectivity to existing levers such as Zoom, Logan and NUTT. The steel braided flexi whip hose shown on the right with factory crimped fitting is the higher-end TurboBrake HB427-4M calliper.
   
   
7. Bracket offset (height) is the distance from centre of threaded hole in the bracket that connects to the scooter to the surface of the edge of bracket where the calliper sits. Sometimes brackets are labelled with a nameplate on the underside. Image below contrasts some of the brackets as observed on Kaabo/Zoom callipers:
   
   
8. US spelling caliper.