H2-R

Note: From an H2-R manual
Compression Ratio: 6.7
Igniton timing: 23 deg BTDC
Plugs: NGK B-10.5 EN
Fuel: Gasoline above 98 octane
Lubrication: Superlube and 30:1 pre-mix

 



Gearbox ratios:

Ratio

Total

1st

1.714

8.911

2nd

1.294

6.728

3rd

1.048

5.449

4th

0.900

4.679

5th

0.826

4.294

Primary:

1.875

 

Final:

2.733

 


Port Timing:
Note: These would vary, especially on the factory racers. These specs used a 4mm cutaway on the piston intake.

Inlet

Open

BTDC

78 Deg

Inlet

Close

ATDC

78 Deg

Transfer

Open

BBDC

63 Deg 30 Min

Transfer

Close

ABDC

63 Deg 30 Min

Exhaust

Open

BBDC

96 Deg 30 Min

Exhaust

Close

ABDC

96 Deg 30 Min


Carburetor Specs:

Mikuni VM35SC

Part Name

Code

Specification

Main Jet

MJ

280

Air Jet

AJ

2.0

Jet Needle

JN

9FR3-3

Needle Jet

NJ

Q-O (8mm)

Throttle Valve

CA

5.0

Pilot Jet

PJ

60

Pilot Outlet

PO

1.8

Air Adjusting Screw

AS

1/2

Valve Sheet

VS

3.3

Float Level
(from bore center)

 

1.44 in. (36.5+/- 1mm)


Heads:

Still trying to find specs.

Chambers:

Still trying to find specs.