04-09-16, 04:10 PM
Michelin recommend standard Yamaha pressures to be used in the PR3 and 4s.
The reason for the discrepancy in pressures is probably because 2.25bar is 32.63psi and Yamaha round it down whereas Haynes round it up.
Start with 32psi and try different options up to 36psi until you get one that feels right. Use the same pressure gauge each time to ensure you are comparing like with like and when the tyres are cold (before a ride out not after). Service station guages are notoriously inaccurate, buy a good pen type guage (like PCL) and keep it with you.
The reason for the discrepancy in pressures is probably because 2.25bar is 32.63psi and Yamaha round it down whereas Haynes round it up.
Start with 32psi and try different options up to 36psi until you get one that feels right. Use the same pressure gauge each time to ensure you are comparing like with like and when the tyres are cold (before a ride out not after). Service station guages are notoriously inaccurate, buy a good pen type guage (like PCL) and keep it with you.