Using a rear tire with a different size than the one recommended by the manufacturer can have some implications. Let's consider the two sizes you mentioned:
130/70-17: This tire size has a narrower width compared to the stock tire size of the Pulsar 220. Using a narrower tire may lead to a reduction in grip and stability, particularly during cornering. It can also affect the overall handling and balance of the motorcycle.
140/70-17: This tire size has a wider width compared to the stock tire size. A wider tire may offer increased traction and stability, particularly during acceleration and cornering. It can also enhance the aesthetic appeal of the motorcycle.
Additionally, it may affect the bike's suspension setup and could potentially scrape against the fender or other parts if the tire is too wide.
It is generally recommended to use the tire size specified by the manufacturer for optimal performance and safety. If you are considering using a different tire size, it's advisable to consult with experts, such as professional mechanics or tire specialists, who have experience with your motorcycle model. They can provide you with more specific guidance based on your riding style, local road conditions, and the compatibility of the chosen tire size with your bike's suspension and clearance.