Communicating accelerometer data through rf modules using arduinos on both transmitter and receiver sides

Hello, this is my first query on this forum. I am trying to make a hand gesture controlled bot, for this I am trying to send the data of accelerometer from one arduino to other by using 433Mhz modules. I am using radiohead library for this purpose in my code.

This is the transmitter part code -

#include <RH_ASK.h>
#include <SPI.h>


RH_ASK transmitter;
void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  //pinMode(8,INPUT);
  //pinMode(9,INPUT);
  //pinMode(10,INPUT);
  if(!transmitter.init())
  {
    Serial.println("init failed");
  }
}

void loop() {
  // put your main code here, to run repeatedly:
  Serial.print("X=");
  Serial.print(analogRead(A0));
  unsigned int x = analogRead(A0);
  Serial.print("          Y=");
  Serial.println(analogRead(A1));
  unsigned int y = analogRead(A1);
  //transmitter.send('x',1);
  byte x_high = highByte(x);
  byte x_low = lowByte(x);
  //transmitter.send((byte)x_high,1);
  //transmitter.send((byte)x_low,1);
  //transmitter.send('y',1);
  byte y_high = highByte(y);
  byte y_low = lowByte(y);
  //transmitter.send((byte)y_high,1);
  //transmitter.send((byte)y_low,1);;
  byte send_data[6];
  send_data[0] = 'x';
  send_data[1] = x_high;
  send_data[2] = x_low;
  send_data[3] = 'y';
  send_data[4] = y_high;
  send_data[5] = y_low;
  transmitter.send((byte*)send_data,6);
  delay(500);
  //Serial.println(digitalRead(9));
  //delay(2000);
  //Serial.println(digitalRead(10));
  //delay(2000);
}

This is my receiver side code -

#include <RH_ASK.h>
#include <SPI.h> // Not actualy used but needed to compile

RH_ASK receiver;//(2000,11,12,10);

void setup()
{
  //pinMode(11,INPUT);
  Serial.begin(9600);  // Debugging only
  if (!receiver.init())
    Serial.println("init failed");
  //pwm enable pins 9 and 10 for motor 1 and 2
  pinMode(9, OUTPUT);
  pinMode(3, OUTPUT);
  //in1 and in2 for motor 1
  pinMode(5, OUTPUT);
  pinMode(6, OUTPUT);
  //in3 and in4 for motor 2
  pinMode(7, OUTPUT);
  pinMode(8, OUTPUT);
}
// accelerometer readings 270 to 400
//stop at 325 to 345

void loop()
{
  //Serial.println("Running");
  byte buf[6];
  uint8_t buflen = sizeof(buf);
  if (receiver.recv(buf, &buflen)) // Non-blocking
  {
    int x = (int)buf[1] << 8 | buf[2]; // getting integer values from bytes
    int y = (int)buf[4] << 8 | buf[5];
    // Message with a good checksum received, dump it.
    //if(buf[0]=='x' && buf[3]=='y')
    Serial.println(buf[0]);
    Serial.println(buf[3]);
    Serial.print("X: ");
    Serial.print(x);
    Serial.print("      Y: ");
    Serial.println(y);
    //Serial.println((char*)buf);
    /*if(((x<450) && (x>250)) && ((y<450) && (y>250))) */
    if ((y < 450) && (y > 250)) {                        // ISSUE CREATING PART
      if (y < 325) {
      int pwmOutput = map(y,325,250,0,255);
      analogWrite(9,pwmOutput);
      analogWrite(3,pwmOutput);
      digitalWrite(5,HIGH);
      digitalWrite(6,LOW);
      digitalWrite(7,HIGH);
      digitalWrite(8,LOW);
      }
      else if (y > 345) {
      int pwmOutput = map(y,345,450,0,255);
      analogWrite(9,pwmOutput);
      analogWrite(3,pwmOutput);
      digitalWrite(5,LOW);
      digitalWrite(6,HIGH);
      digitalWrite(7,LOW);
      digitalWrite(8,HIGH);
      }
      else {
      digitalWrite(5,LOW);
      digitalWrite(6,LOW);
      digitalWrite(7,LOW);
      digitalWrite(8,LOW);
      }

      }
      else {
      digitalWrite(5,LOW);
      digitalWrite(6,LOW);
      digitalWrite(7,LOW);
      digitalWrite(8,LOW);
      }
  }
}

So basically what I am doing here is that I am sending and receiving X and Y values. In the receiver part code I have marked "ISSUE CREATING PART", so if I am not putting up this if else clause, I am able to receive the X and Y values properly and they are also showing on the serial monitor. This if else clause is just basically using these received values for driving the motors. When I am adding this if else clause, I am not even able to receive the X and Y values. Which means this is interfering in some way with the code above it which was working fine in its absence. I am unable to figure out the issue.

This snapshot is with "ISSUE CREATING PART" uploaded in receiver, and here the reception stops like this on the left and correct reception without "ISSUE CREATING PART" on the right -
accel_error_correct

I request you to point out the possible issues here.
Thank you.

Fine You use code tags. If You use autoformat in the IDE before copying it would make the code a lot easier to read.

Ohh okay I will take care next time. This time I used the copy for forum option and pasted it directly. Also sir, do you have any solution to this problem?

You did well and got the code in code tags. Just the IDE autoformat means a lot. Any disorder among the curly brackets, the indentation, shows up clearly.
Hang on and wait for an SPI helper to pop up.

Tried Google..... arduino + spi - Bing

You mean I should inculcate the spi protocol? Yes sure I will wait on further assistance.