When i set speed to 8miles it shows 12.9 speed

It sounds like the issue with your Honda XLR125 (1998) not picking up speed in top gear could be related to a clutch problem. If the clutch is slipping, it could be causing the engine to rev high and prevent the bike from reaching higher speeds. Clutch slipping is often a result of worn clutch plates, which can cause decreased friction and ineffective transfer of power from the engine to the transmission.
Based on your description, it may be necessary to replace the clutch plates to resolve the issue. If you're unsure about the condition of the clutch, I would recommend having a professional mechanic inspect it to diagnose the problem and recommend the appropriate repairs. It's important to address any clutch issues as soon as possible to prevent further damage to the engine and transmissio

• AC drive board (ACDB)
• Printer control board
(PRCB)
• 1st transfer pressure
release motor (M19)
• 1st transfer HP sensor
(PS15)n

Check the above items first the sensor and the motor the boards $$$$$$$$$$$$$$$

Possibly a bad thermostat.
see last section at link below.
Do It Yourself Diagnosis and Repair

Here are the 3 engines listed for this year. IGNITION TIMING

2002 Nissan/Datsun Truck Frontier Pickup 2WD 2.4L SFI 4cyl

The Ignition Timing

18-22 DegreesBefore top dead center - When throttle positionsensor disconnected and using suitably programmedscan tool.When adjusting idle speed, set parking brake & chock drive wheels, curb idle speed (750-850 RPM)transmission in neutral.

IGNITION TIMING

2002 Nissan/Datsun Truck Frontier Pickup 2WD 3.3L SFI 6cyl

The Ignition Timing

8-12 DegreesBefore top dead center - throttle position sensorharness disconnected.When adjusting idle speed, set parking brake & chock drive wheels, curb idle speed (700-800 RPM)transmission in neutral.

IGNITION TIMING

2002 Nissan/Datsun Truck Frontier Pickup 2WD 3.3L SFI SC 6cyl

The Ignition Timing

8-12 DegreesBefore top dead center - throttle position sensorharness disconnected.When adjusting idle speed, set parking brake & chockdrive wheels, curb idle speed (700-800 RPM)transmission in neutral.

It got wet and is dead.

that shouldnt be hard to fix. to fix that, press the forward button then hold it. it should take you to a H.SET setting with the word SUB flashing. use forward to move the small arrow. move the small speed arrow to 50, then press MODE. the arrow should be on 12:00. if its not, use the forward and reverse buttons to adjust it to 12:00. you can hold any one of them to speed up arrow process. when your arrows are on 12, press the adjust button and then arrows should display the correct time

motor controller and speed sensor both are malfunctioning

make sure that you don't need to overclock your setting (in BIOS ) so as to get full ddr3 frequency.That it, you need to overclock your CPU speed and if you want to work at great speed, try you upgrade you processor.
try a core 2 duo or a quad-core and make sure that it matches with your FSB, with maximum L catch ( 12 mb)

blower control modular,