Main Large Bearing; Most Largeframe Vintage Vespas 6 Check your service manual

Check your service manual

com/products/performance-exhaust-stainless-steel-qmb139-0500-1057"

even during high-heat summer riding

Do not use an impact gun to torque the variator nut without ensuring the drive belt is fully slack — a pinched belt during torquing can cause the nut to back off under load

Main Large Bearing; Most Largeframe Vintage Vespas 6 Check your service manualLarge crankshaft bearing. Fits clutch side for all models, except small frames. This is also the flywheel side bearing for VNA, VNB, VBB, VBA, VLB, VLA, VBC, VNC, VB1, VS5 and VL1 VL3, so, for those, models you'll need 2. On P series scooters, use 133068 for the flywheel side bearing. And, if you've already torn your engine apart, why not replace the rear hub bearing while you're in there? (Part # 90025).