Dellorto 8297 choke o-ring as used to seal the choke chamber cover or flip lever assembly to the carb body. Moto Guzzi part number: 17937550. Standard to most Guzzi VHB 29, and all VHB 30, VHBZ, PHBH and PHF carbs. Fitting Eldorado, 850GT, 850T, T3, T4, T5, V7 Sport, 750S, S3, 850 LeMans, Lemans II, Lemans III, CX100, Convert, G5, California II, most California III, SP1000, SP II, SP III, Mille, most 1000S, Strada, V35, V50, V50 II, V50 III, Monza, V65C, V65SP, V65TT, Lario.
Most Ambassador and V750 Special 1969 to 1971 VHB 29 carbs do not use this oring. If you have one of these models, the choke chamber cover will generally not have an o-ring groove cut in it allowing it's use. Check your cover to be sure.
Also used on Dellorto PHBE, PHBH, PHBL, PHF, VHSA, VHSB, VHSC, VHSH, VHST, VHB, VHBZ and VHBT carbs used on Ducati, Morini, Laverda, BMW, and other brand motorcycles and scooters. Readily available, guaranteed new and perfect.