Setup info for PVP 252 Motor
Last update 17-05-2012
Important: Use only fuel supply system with, filter, vacuum pump, regulator & pressure gauge "click here"
Specification
Cylinder and Piston
| Bore: 54,02 maximum 54,035,
Stroke: 54,5 mm |
Piston /Cylinder Clearance: minimum 0.06 mm. |
Squeeze 0.75 in the front cylinder (
insert 2.3 )
Squeeze 0.8 in the rear cylinder ( insert 2.25 ) |
| The motor is also approved with 113 mm. rod, you can use together with piston there have part no. 393, 394, 395, 396 and 397, and you can start with a cylinder diameter of 54.0 mm. this piston is cheaper, but this piston is 11 gram heavier than piston no. 3965. |
Ignition
| Ignition unit: PVL | Ignition timing: 5.4 mm before T.D.C. | Spark plug: NGK B10EGP or NGK R7282-11 |
| Spark plug connector for NGK B10EGP is: part no. 898 | Spark plug connector for NGK R7282 is: part no. 899 |
| If you have problem with it burning a hole in the middle of the piston then reduce the ignition timing to 5.0 or 5.2 mm. before T.D.C. | I f you have problem with detonation then increase the volume of the combustion camber, or use fuel with higher octane. |
Rotary valve
| Rotary valve timing | Opens: 51.4 mm. before T.D.C. | Closes: 28.8 mm. after T.D.C. |
| Part no. 281 |
Primary drive
| clutch axle / rear crankshaft | Reduction | |
| Primary reduction ratio: | 58 : 26 | 2.2308 |
Gearbox
| Standard | Reduction | Option | Reduction | |
| 1 st. gear | 32 : 12 | 2.6666 | 31 : 13 | 2.3846 |
| 2 nd. gear | 29 : 14 | 2.0714 | 28 : 15 | 1.8666 |
| 3 rd. gear | 22 : 14 | 1.5714 | 24 : 16 | 1.5 |
| 4 th. gear | 23 : 17 | 1.3529 | 25 : 19 | 1.3157 |
| 5 th. gear | 22 : 18 | 1.2222 | 26 : 22 | 1.1818 |
| 6 th. gear | 23 : 20 | 1.15 | 21 : 19 | 1.1052 |
| Gear box oil | In primary drive | In gear box |
| Castrol Syntrax 75-90 or ELF HTX 740 | 0.2 Liter | 0.4 Liter |
Recommended gear box for following races tracks
| standard 1, 2, 3, 4, option 5, 6 | Hockenheim, Magny Cours, |
| standard 3, 4, option 1, 2, 5, 6 | Assen, Dijon, |
Recommended sprocket for motor and rear axle
| Motor: 22 T. 23 T. 24 T. 25 T. & 26 T | Rear axle: 29 T. 30 T. 31 T. 32 T & 33 T. |
Chain
| To not overload the chain use minimum 22 T. on the motor and minimum 29 T. on the rear axle, for front and rear sprocket together have minimum 52 T, so you not overhead the chain. | For lubrication of the chain, use:
Pro chain spray ( PN. 4024) |
Fuel supply system
| Fuel pump | Fuel pressure | Pressure Regulator | Fuel Filter |
| Mikuni puls pump | 0.15 to 0.18 Atu. | Part no. 4010 | Part no. 4036 |
Torque for bolt and nuts
| M6 | M7 | M8 | M18x1,5 | M22x1.5 |
| 10 Newton | 13 Newton | 20 Newton | 100 Newton | 100 Newton |
| Plug screw | ||||
| 20 Newton |
Petrol (Gasolin) & Oil
| Petrol:
Elf: SK35 ( or minimum Octane 102 unleaded) |
Oil: 4% mixture
Elf. HTX 976. |
Carburetor : PVP 42 mm.
| Jet needle | Needle jet | Main jet | Needle jet | Air screw | Needle valve |
| K24 clip position 3 from top | DQ 270 | 210 to 220 on front and rear cylinder
|
120 with 44 pilot jet |
about 1.5 round out | 250 |
Always Change oil then you open gear box or primary drive
After 3 races weekends
| Description | Qty. | Part number |
| Piston, piston pin, c-clips & Piston ring ( for 115 mm. rod) | 2 | 3965 |
| Main bearing (if you have solid alum. in the crank can you drive 6 races weekends) | 4 | 860 |
| Big end needle bearing in rods | 2 | 223 |
| Oil seals between crankshaft and primary drive | 2 | 812 |
| Oil seal behind water impeller or if there come water out from the drain | 1 | 806 |
Also change this after 6 races weekends
| Description | Qty. | Part number |
| Rods, crankshaft pin and | 2 | 226 and 227 |
| Side washer | 4 | 222 |
| Small end bearing for rod | 2 | 390 |
| Bearing for end of crank shaft | 2 | 848 |
| Oil seal behind ignition & inside oil seal with water pump | 2 | 806 |
| Oil seal for clutch drum | 820 | |
| Bearing in gearbox 6304-C3 2-RS ø20/52x15 | 1 | 852 |
| Bearing in gearbox 6203-C3 2-RS ø17/40x12 | 1 | 845 |
| Bearing in gearbox 6203-C3 ø17/40x12 | 1 | 844 |
| Bearing in gearbox 6205-C3 ø25/52x15 | 1 | 856 |
| Oil seal on shift shaft | 1 | 802 |