If you want to use your CVTech Trailbloc clutch and have installed oversized tires (taller than stock), you must install a calibration kit to offset the effect of larger/heavier tires. This kit includes: clutch spring and clutch weights (some kits will not come with weights if they are not necessary).
Nothing beats a great set of oversized tires! But remember – when you increase the diameter and weight of your rubbers, you also create more belt slip unless you recalibrate your clutches. This means only some of your power is actually making it to the ground – the rest of it is just burning up your belt. The good news? This clutch kit will fix this!