Tecate T4 Tech

T-4 Tech

DISPLACEMENT 249cc
BORE 67.40mm
STROKE 70mm
ROD LENGTH 125mm
PLUG NGK B8ES
IGN TIMING 18Deg BTDC @ 6,000 RPM

1987 KXF250-A1

6 Speed Transmission

Gear Ratios

1st 2.357

2nd 1.750

3rd 1.388

4th 1.150

5th 1.00

6th 0.880

Final Drive 3.00 (39/13)

13 Tooth front sprocket
39 Tooth rear sprocket

Cheep and easy Tecate Degree Wheel! Right Click / Save picture as / then print out as CD Label - attach to Old CD! Perfect size, use hole in CD to bolt up to Crankshaft!

PORT TIMING

Scavenge:

OPEN 59.5 Deg (BBDC)

CLOSE 59.5 Deg (ABDC)

DURATION 119 Deg

Exhaust:

OPEN 88.25 Deg (BBDC) 1987

             86.5 Deg (BBDC) 1988

CLOSE 88.25 Deg (ABDC) 1987

              86.5 Deg (ABDC) 1988

Duration: 176.5 Deg (1987)

                   173 Deg (1988)

Port Timing Changed from the 87 to 88 model year, with an decrease in exhaust duration for the 88.