Cylinder Kit
Cylinder Kit - Image 2

Cylinder Kit

Made from high-performance ADC 12 aluminum alloy with a wear-resistant cast iron body, we offer world-class quality cylinder kits.

Strengths:

  • Precise tolerances for improved efficiency and reduced wear rate
  • Quality according to OEM standards
  • High temperature resistance

Characteristics:

  • ADC 12 raw material with a high copper content of 1.65%
  • Maintaining a sleeve diameter tolerance level of 0.002 mm ~ 0.003 mm
  • Heat treatment at 350 degrees Celsius
  • Wear-resistant heat-treated cast iron sleeve
  • Brinell hardness range ≥74.1 HBS
  • Tensile strength range ≥ 190 MPa
  • Ductility ≥ 1%

Related products

  • Raw Material
  • Manufacturing
  • Evidence
Raw Material

We place special emphasis on the raw materials we start with. Compared to the competition, we've also focused on the smallest parts.

Areas of focus when choosing raw materials:

  • Lightweight and structural material
  • Corrosion resistance
  • Withstands high temperatures
Parameter Details  Elpra Chinese Product Advantages of Elpra
BOP (Parts purchased) Iron Shirt Internal BOP More BOPs mean a higher probability of rejections.
Piston Pin Internal BOP
Piston Internal BOP
Pre-existing insurance BOP BOP
Boards BOP BOP
Parameter Details Elpra Product of China Advantages of Elpra
BOP
(Parts
Purchased)		 Cylinder High-grade ADC12 with copper Substandard ADC12 with a copper content of 0.5-0.8%, which is below international standards. The high copper content in cylinders and pistons provides substantial increases in strength and facilitates precipitation hardening.
Piston High-grade AC8A with copper Low-grade cast iron We use a raw material composition designed to reduce ductility and corrosion resistance. Increased ductility, even by 1%, leads to greater versatility and higher performance at a lower cost.
Body High-grade cast iron Standard steel hoops Heat-treated, corrosion-resistant iron grade for robust operation and less wear.
Rings 1. High-grade ring material – Nodular cast iron
2. Wiper ring – (DQ20) STEEL
3. Oil ring – (DS45) STEEL		 BOP 1. We offer lightweight and structural materials
. 2. Made to precise specifications from high-grade gray iron castings. Derived from the OEM factory – ATG
Pin High-grade steel (20CrMo) Recycled Rubber Our product has high corrosion resistance
Boards Fresh rubber (NBR) Recycled Rubber Seal-proof operation with no power loss
Manufacturing

Every step in the manufacturing process conforms to global standards; the comparison below explains how we manufacture our products.

Parameter Details Elpra Chinese Product Advantages of Elpra
Manufacturing Production technology Fully automated CNC machines with a capacity of 1 cylinder per minute Semi-automated CNC or Lathe machines By using fully automated CNC machines, we offer products with minimal tolerance levels and negligible rejection at the final stage.
Vertical milling center Fully automatic VMC (vertical milling center) VMC is not available in most factories The product is manufactured using VMC for precise oil grooves and bolt holes. These machines are only available from OEM manufacturers.
Heat treatment Heat treatment of 350 degrees Maximum heat treatment
of 250 degrees		 1. We ensure increased hardness and achieve maximum strength and durability.
2. Maintain the Brinell hardness range of 741 HBS.
Painting workshop Automatic paint shop Semi-automatic/manual painting facilities 1. It keeps the product visually appealing for longer without the paint chipping.
2. We offer an international standard finish that improves the part's ability to resist wear and fatigue. Rust-free surface throughout its lifespan.
Electroplated 0.6-0.8 microns Not consistent

Apart from giving the spare part the perfect appearance, a good finishing helps to create a smoother surface for higher overall functioning of a motorcycle. We offer both Color painted (Shiny black, Silver, Matt) & Sand blasted finish on Cylinder.

Evidence

We offer products that meet international quality standards. We offer a high-grade ADC12 with a copper content of 1.60-1.70%. In contrast, the copper content of other Chinese products is even lower than the international standard of 1.2% and above. Copper increases a material's resistance to breaking under stress or load.

Parameter Details Elpra Chinese Product Advantages of Elpra
Testing standards Arrival of parts Inspection and testing of 100%
of the parts received		 Random without evidence Controlling standard parameters in each process
maintains a sleeve diameter tolerance level
of 0.002 mm ~ 0.003 mm
Internal process Verification in each process through various process-specific test
gauges . Random dimensional control with a three-axis coordinate measuring machine.		 Visual test Controlling standard parameters in each process
maintains a sleeve diameter tolerance level
of 0.002 mm ~ 0.003 mm
Final Inspection Pneumatic gauge for checking
piston assembly and
movement in the cylinder liner		 Manual gauge for checking
piston movement in
cylinder liner		 Standard fit verification
Functional test
(Cylinder mounted on
the engine tested
for 380 hours)		 A motorcycle with our
cylinder is continuously tested
under operating conditions
for 380 hours. The variation
found in the inner diameter of
the cylinder liner is only -0.012 mm.		 No functional testing. Only
OEM-level factories have this
facility.		 According to international standard tests, it must be tested
for 200 hours and the variation must not exceed
0.02mm. Therefore, our product surpasses
OEM standards.
Product Inspection Report
Client: Elpra Code: EAST-001 Model: YBR125 Batch Number JAN12018
Reported No. CYL125
Name: Full Cylinder Note: APPROVED Sample QTY: 5 PCS Snap Check shows QUANTITY: 5 pieces
Item. Terms inspected Technical data and descriptions. Inspection method Record
1 2 3 4 5 Conclusion
Appearance No Scratches,Rust Cracks & Blow holes Visual and manual There are no scratches & glitches, no rusts & cracks, no blowholes OK
1 Diameter =54 0.01 0 Pneumatic tool Ø54.006 Ø54.004 Ø54.006 Ø54.005 Ø54.005 OK
Block 0.005 Pneumatic tool 0.003 0.004 0.003 0.004 0.003 OK
Surface roughness Ra0.4 Surface roughness instrument Ra0.4 Ra0.4 Ra0.4 Ra0.4 Ra0.4 OK
2 Height 65.3±0.05 Depth gauge ruler 65,340 65,320 65,300 65,320 65,320 OK
Upper plain 0.05 Dial indicator 0.030 0.030 0.030 0.020 0.030 OK
Lower plain 0.05 Dial indicator 0.030 0.030 0.030 0.030 0.020 OK
Upper and lower plain 0.05 Dial indicator 0.030 0.030 0.030 0.030 0.030 OK
Parallelism
Top surface Ra1.6 Comparison of sample blocks OK OK OK OK OK OK
Rugosity
Lower Surface Ra1.6 Comparison of sample blocks OK OK OK OK OK OK
Rugosity
3 Height 88±0.5 Depth gauge ruler 88,400 88,420 88,380 88,400 88,400 OK
4 Size =59.5 0 -0.5 Caliber Ø59.2 Ø59.2 Ø59.2 Ø59.18 Ø59.24 OK
5 Distance from the center 40±0.15 Caliber 40.040 40,000 40,000 40,000 40.020 OK
6 Specification 2×M6-6H Thread gauge OK OK OK OK OK OK
Depth 16 1 0 Caliber 16,500 16,300 16,200 16,300 16,360 OK
7 Size 5.5 0.5 0 Caliber 5,700 5,600 5,600 5,700 5,600 OK
8 Bolt diameter =10 0.022 0 Caliber OK OK OK OK OK OK
Depth 10 0.5 0 Caliber 10,400 10,300 10,300 10,400 10,360 OK
9 Bolt diameter =10 0.022 0 Plug Gauge OK OK OK OK OK OK
Depth 10 0.5 0 Caliber 10,300 10,300 10,320 10,340 10,360 OK
10 Bolt diameter =10 0.022 0 Plug Gauge OK OK OK OK OK OK
Depth 10 0.5 0 Caliber 10,400 10,300 10,300 10,400 10,300 OK
11 Bolt diameter =10 0.022 0 Plug Gauge OK OK OK OK OK OK
Depth 10 0.5 0 Caliber 10,400 10,300 10,300 10,300 10,300 OK
12 Size 50±0.3 Three-Dimensional 50,100 50,200 50.120 50.140 50,100 OK
Rugosity Ra1.6 Comparison of sample blocks OK OK OK OK OK OK
Material composition test
Item Chemical Composition STD Elpra Product 

Chinese
 

 

1

 Cu 1.5-3.5 1,873 1,770
2 Mg =0.3 0.209 0.209
3 Zn =1.0 0.667 0.530
4 Yeah 9.5-11.5 10,430 10,410
5 Faith =0.8 0.058 0.820
6 Mn =0.5 0.153 0.127
7 Cr =0.2 0.043 0.017
8 Neither =0.3 0.039 0.027
9 Pb =0.1 0.000 0.011
10 You =0.3 0.035 0.088