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My Trx250x
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In this website you will see pictures of me riding my 4-wheeler and some useful information about an 87 Trx250x.

Spark Plug

Below is some very useful info. if your rebuilding your topend of a stock 87 trx250x Quad

Displacement: 246.4cc

Bore & Stroke: 74mm & 57.3mm

Compression: 9.4±0.2:1 (185 ±14.2psi cold cranking)

Carburetor: 36mm

Lubrication: wet sump, pressurized

Ignition: CDI

Ignition timing: 23°±2°BTDC/3,000±200RPM

Starter: forward kick

Transmission: 5-speed manual clutch, plus reverse

Transmission ratios: primary 2.833 (68/24), 5th 1.178 (33/28), 4th 1.458 (35/24), 3rd 1.857 (39/21), 2nd 2.529 (43/17), 1st 3.692 (48/13), final 2.923 (38/13)

Final Drive: #520 chain, O-ring sealed

Overall Length: 1,720mm (67.7")

Overall Width: 1,105mm (43.5")

Overall Height: 1,085mm (42.7")

Seat Height: 770mm (30.3")

Footpeg Height: 325mm (12.8")

Wheelbase: 1,225mm (48.2")

Ground Clearance: 125mm (4.9")

Dry Weight: 164kg (362 lbs), engine only: 39.2kg (86.4 LB)

Curb Weight: 170kg (375 lbs)

Maximum Weight Capacity: 120kg (270 lbs)

Fuel Tank Capacity: 8.5 liter (2.3 gal) including reserve

Front Wheels: AT22x7-10 aluminum rims with 4 on 144mm bolt pattern

Rear Wheels: AT22x10-9 aluminum rims with 4 on 110mm bolt pattern

Brakes: triple hydraulic disk, single piston caliper designs

Front Suspension Travel: 170mm (6.7"), double wishbone, adjustable preload

Rear Suspension Travel: 200mm (7.9"), decarbon-type damper, adjustable preload

Caster:

Camber:

Trail: 35mm (1.4")

Toe-in: 10mm (0.4")

Turning Radius: 3.2m (10.5')

Specifications:

Engine: 246cc single-cylinder, air-cooled, four-stroke, SOHC, 4-valve
Transmission: manual clutch, Close-ratio Five-speed plus reverse
Brakes: triple hydraulic disk
Fuel capacity: 2.2-gallons, including reserve
Front suspension: 6.7-inch, double-wishbone, aluminum wheels
Rear suspension: 7.9-inch, swingarm, aluminum wheels
Length: 67.7 inches
Width: 43.5 inches
Dry weight: 361.6 pounds
Rear wheels: 22x10-8 tires on aluminum rims
Front wheels: 22x7-10 tires on aluminum rims

Piston