Recently(Nov 2009) my brother bought thunderbird twinspark, the problem m facing nw is that the rear tire of the bike is touching the mud-guard & due to which the real tail lamp wire got cut.
When their is a cut in any part of the wiring the fuse gets blown up & the bikes stops there itself. so its a serious problem & you should think before buying it!
I request the people of the manufacturing plant to look after this problem as it is creating a pool of unsatisfied customers.
Showroom is unable to help me out!