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Specs: Honda Powertrain

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4Strokes
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Specs: Honda Powertrain

Postby 4Strokes » Fri Jun 03, 2016 5:12 pm

We recommend using a service manual for any repair. For those times where a manual is not accessible, we have provided this specs page for reference.

CL70 Scrambler Specs
Carburetor Settings
  • Float Level/Height: 7mm ('70)

CRF50F Specs
Spark Plug Gap
  • 0.028"

CT70 Specs
Carburetor Settings
  • Pilot Screw: 1.5 turns out ('69 Lyfeguard)

CT90 Specs
Carburetor Settings
  • Pilot Screw: 1.5 turns out (ref topic), 1 turn out (minioutlaw)
  • Needle: 2nd groove from top (ref topic) (minioutlaw)

CT110 Specs
Carburetor Settings
  • Pilot Screw: 1.5 turns out (ref topic) (minioutlaw)

RX100 Specs
Carburetor Settings
  • Air screw: 1 1/2 turns out (Dekni PZ26)
  • Needle Clip: 2nd pos (Dekni PZ26)
  • Float: 0.22mm/0.866", drop 0.24mm/0.945" (Dekni PZ26)

XL75 Specs
Carburetor Settings
  • Float Level: 20mm/0.787" ('77) (How to measure & adjust)

XL100S Specs
Valve Lash/Clearance
  • Int & Exh: 0.05mm/0.002" cold & "T" lined up on flywheel ('83 XL100S)
Oil capacity
  • 1qt

XL250R Specs
Factory Carburetor Jetting (1987 Model)
  • Above 6,500' Primary: #95, Secondary: #98
  • Below 5,000' Primary: #105, Secondary: #105
(Primary carb is on left and Secondary right, when sitting on bike. -Johnny Enduro) (ref)


XR50R Specs
Oil Capacity
  • 0.63-0.75 qts (600-700ml)


XR75 Specs (1978)
Carburetor Specs
  • Main Jet: 92 (xr250rguy)
  • Slow Jet: 35 (xr250rguy)
  • Float Level: 21.5mm (JimmyB)
Spark Plug
  • ngk c7hs (xr250rguy)
  • gap: 0.6-0.7mm (JimmyB)
Valve Clearance
  • Int & Exh: 0.05mm (JimmyB)

XR80R Specs
Carburetor Settings
  • Main Jet: 95 ('02 PC20J carb)
  • Slow/Pilot Jet: 35 ('02 PC20J carb)
  • Needle Clip: 3rd grove ('02 PC20J carb)
  • Idle Speed: 1500rpms +/- 100rpms

Ignition Point Gap
  • 0.3-0.4mm/0.012-0.016" ('85-'96)

Ignition Timing
  • "F" aligned with index mark at idle (1500rpms +/- 100rpms) (how to set timing)

Valve Lash/Clearance
  • Intake & Exhaust: 0.05mm/0.002" cold ('85-'96)

Cylinder Compression
  • 171psi +/- 28psi

Torque Specs (all '85-'96)
  • Cylinder head nuts: 18-20ft-lbs (minifig-phil)
  • Cyl head cover bolt: 9ft-lbs
  • Cam holder nut: 14ft-lbs
  • Cam sprocket: 9ft-lbs
  • Spark plug: 10ft-lbs
  • Valve adj bolt locknut: 7ft-lbs.

Tire Size
  • Front 2.5-16, Rear 3.6-14


XR100R Specs
Oil Capacity
  • 1qt

Carburetor Settings (22mm carb)
  • Main Jet: 95
  • Slow/Pilot Jet: 38 (non-CA), 35 (CA)
  • Needle Clip: 3rd groove
  • Air Screw: 1-1/2 to 1-3/4 out from seated, 1-3/4 (up to '88 -Maco)
  • float level: 12.5mm (up to '88 -Maco)
  • Idle Speed: 1400rpms +/- 100rpms

Ignition Point Gap
  • 0.3-0.4mm/0.012-0.016" at TDC (How to adjust)

Ignition Timing
  • "F" aligned with index mark at idle (1400rpms +/- 100rpms) ('85-'91) (How to adjust timing chain)

Valve Lash/Clearance
  • Int & Exh: 0.05mm/0.002" cold & "T" lined up on flywheel ('96-'01)

Cylinder Compression
  • 164psi +/- 21psi

XR200R Specs
Oil Capacity
  • 1.5 qts (1986) (4banger1)

Stock Carb Settings (2001 model)
  • Main #110 (#102 CA)
  • Slow #38 (#35 CA)
  • Needle clip 3rd from bottom
  • Pilot screw 1.5 turn (2 CA)

  • Axle Nut Torque (1983): 58-80 ft/lbs (ref topic)
  • Chain tension measurement (1983): 1-3/8" to 1-3/4" from middle of chain at bottom of swing arm. (ref topic)
  • Rear brake adjustment measurement (1983): Brake pedal free-play is 3/4" to 1-1/4". (ref topic)
  • Cylinder head bolt torque: The (4) 10mm head to cylinder bolts are 34-38ft-lbs. Manual recommends tightening in at least two stages using criss cross pattern. (ref topic)

XR250R Specs
Oil Capacity (1984 XR250R) (ref topic)
  • 1.3 ltrs (1.5 ltrs after rebuild)

Intake & Exhaust Inner Valve Spring Free Length (1978-1983 XR250/XR250R) (ref topic)
  • Specification: 43.6mm (1.72")
  • Wear Limit: 42.5mm (1.67")

Stock Tire Size
  • Fr 3.00-21-4PR, Rr 4.60-18-4PR

XR350 & XR350R Specs
Valve Clearance
  • 0.002" Int, 0.003" Exh (engine cold)

  • 1983-1986 XR350R/XR500R Specs

XR400R Specs
Stock Gear Ratio & Chain
  • 15/45 520x108 (1996-2003 models)

Valve Clearances (2001 model)
  • Int .010mm
  • Exhaust .012mm

Engine Oil Capacity
  • 1.8qts at draining
  • 1.9qts with filter change
  • 2.3qts with engine disassembly
  • XR400R Engine Oil Checking and Changing

    Carb Screw Replacement to Allen Head (ref topic)
    • Qty 2 of 3x8mm for the slide mount
    • Qty 1 of 4x10mm for the plate that holds the choke arm on.
    • Qty 4 of 4x12mm 2 for the top slide cover, 2 for small side cover.
    • Qty 3 of 4x16mm for the fuel bowl.
    • Qty 1 of 5x12mm for the throttle cable plate.
    (The first number is the screw size in mm and the second is the length in mm)

  • Clutch Pressure Cover Plate bolt torque: 6-9 ft lbs

XR500R Specs

XR600R Specs
Carburetor Settings
  • Pilot Jet: 62 ('96 cbaranski)
  • Main Jet: 152 ('96 cbaranski)
Valve Clearances

XR650R Specs
Valve Clearances
  • Int 0.15mm +/- .02mm .006" +/- .001
  • Exh .20mm +/- .02mm .008" +/- .001

Z50 Specs
Engine Compression
  • 170psi +/- 10psi (Zeniac)

Feel free to post your Honda related specs below and we will add them here.

Disclaimer: 4Strokes.com is in no way responsible for any adverse outcome in relation to any specification listed here. These specs are being provided as reference only. Use at your own discretion and assume all risks associated with these specs.

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