I always stuck with 20-25lbs for a .10th .That range just to compensate for inconsistencies that can occur with rider error, etc. and on a bike that is still at the very most airshifted but no fancy electronics.
Not sure if this still holds true once a vehicle runs in the 7s or quicker.
The quicker/faster/lighter the bike/rider package is, the more I would think the amount of weight would be less to cost you a 10th.
Like I said I have done very little with bikes at the drags, the only way I could see what sort of differance it made was to make 4 or 5 runs bolt 20 lbs on the bike and make 4 or 5 more runs now this would have to be on the same day with at least close to the same conditions, I do know that once a certain level is reached it takes a shitpot more power to go just a little faster, on my dragster, it figured out to about 800 HP +or- to run the 4.80, supercharged on alcohol, blower at 5% overdrive 4.66, 1050 HP.....25% overdrive 4.40, 1225 HP......25% overdrive and 35% nitro/alcohol mix 1750 HP...4.13 ET............the car had more than enough power to go a lot faster but I was way overpowering the car, I geuss what I'm trying to say is when a car or bike gets to a certain power level its tough to guess what exactly made a differance in ET........as I said I don't know on a fast bike, but on my car 20 or 25 lbs was the differance between a full fuel tank a when its half full, I have run hundreds of runs both full and half full, and it made absolutly on measurable differance, in fact I think it was probably faster with the full tank
