Replacing Stock Tyres on Pulsar 220F: Can You Swap to 140/70-17?

Introduction

Considering upgrading your Pulsar 220F with a different tyre? If you currently have stock 120/80-17 tyres and you're eyeing a 140/70-17 model, there are several factors to consider before making the switch.

Can I Replace 140/70-17 Tyre Against the Stock 120/80-17 Tyre in Pulsar 220F?

Yes, you can change the stock 120/80-17 tyres on a Pulsar 220F to 140/70-17. However, each change comes with a set of challenges and considerations.

Width and Profile

The 140/70-17 tyre is wider than the stock 120/80-17 tyre. This change can significantly impact handling stability and cornering performance. While a wider tire may provide better grip, it could also result in a heavier steering feel. Drivers should be aware that the increased width can make the bike more challenging to handle, especially in tight corners.

Clearance Issues

Ensure that there is enough space in the swingarm and the rear fender to accommodate the wider 140/70-17 tyre. If the new tyre is too wide, it may rub against the motorcycle frame or fender, particularly when the suspension is compressed. Riding in wet conditions may exacerbate these clearance issues.

Speedometer Accuracy

Changes in tyre size can affect the accuracy of the speedometer. The overall diameter of the 140/70-17 tyre is slightly smaller than the stock 120/80-17 tyre, leading to potentially higher speedometer readings. This discrepancy may cause drivers to overestimate their speed.

Riding Characteristics

The new tyre profile may alter the motorcycle's handling characteristics, making the ride less stable and balanced. A wider rear tyre can provide more grip but may also change the bike's lean angle into corners, making the handling less predictable. Wet conditions could further compromise grip and braking performance, leading to unexpected stops.

Manufacturer Recommendations

Always consult the manufacturer’s guidelines or seek advice from a motorcycle tyre expert to ensure that the new tyre size is suitable for your specific Pulsar 220F. Improper tyre fitment can lead to performance issues and safety concerns.

Alternatives and Expert Opinions

One enthusiast with a 50 BHP 650 Kawasaki twin reported that the stock 120 rear tyre was the correct size for their 450 lb motorcycle. Even though the stock tyre size was larger than the 130 used in export markets, they found that the smaller tyre improved the bike's handling and feel. They also noted that increasing the tyre size makes everything worse and can lead to a sluggish and imbalanced ride.

For the best performance and safety, it's advisable to have the new tyre installed by a professional to ensure proper fitment and balance. Seek advice from qualified mechanics or tyre experts to avoid potential issues.