Royal Enfield Thunderbird: Difference between revisions

In 2009, the AVL [[Pre-unit construction|semi-unit engine]] was replaced with the new 346 cc [[Unit construction|unit construction engine]] (UCE). The bike was renamed Thunderbird Twinspark owing to the twin [[sparkplug]]s in the UCE. Lighter gauge chassis to reduce weight were incorporated inorder to improve performance. This led to a downgrade in terms of quality strength for the UCE Thunderbird as compared to the AVL Thunderbird, however, an upgrade in terms of performance for the UCE Thunderbird due to lighter weight leading to comparatively faster pickup. The final drive chain is moved to the right side and it is the most obvious change from the old model apart from the new engine. The first generation UCE Thunderbird would share the same 14.3 litre fuel tank and mudguards as the AVL Thunderbird along with 19 inch front and rear wheels. The fuel tank, mudguards along with seat, Meter-set, Handlebars, Pillion backrest, Headlight, signal lights, Foot pegs etc. on the later generation UCE Thunderbird models would be replaced with a larger 20 litre tank. The later models would also have an 18 inch rear wheel as compared to, the 19 inch rear wheel on the old Thunderbird. Later generation models would consist of the UCE engines as per BS3, BS4, BS6 emission norms. A model of the Royal Enfield Thunderbird with the UCE engine called the Royal Enfield Thunderbird X would have changes to the rider triangle position.