Ye gods!!
 

[quote=Senna3]
That is the same as my 620 Class A DD bike....

Seems to me there are way more unbalanced cranks sitting on the seats!!

:mad: You Grass!! :lol: :lol:




I'll be lucky to get 50bhp to be honest, I'm hoping my bike gets picked
random to be tested on a dyno, at least i get to see if my fueling is to pot:)

saves me £50 too:)

To hell with it all, I'm having the crank balanced on my Supersport!

Anyone with less than 50bhp will be lucky to be "randomly" selected for a dyno run I reckon. Unless they are some kind of racing god.;) - you'd need to be troubling the scorers to get some random attention - :)

There are a lot of very well sorted and high budget 583s out there, some probably able to make 53bhp with ease.

Get those bikes and yourselves on a diet, that's the key. I reckon with a lighter bike and light rider, you can obviously get off the line much more quickly than heavier bike/rider combinations and those 3 or 4 places you can make up into turn 1 would be really tough to make up anywhere else.

Tim

Can anyone tell me what modifications this bottom end has ?

I just looke at my crankshaft today and the same type of holes are present: are from factory balancing until proven otherwise (impossible to prove).

Yup and say you were to balance the crank to a finer tolerance than the factory and drill those holes a little deeper, how could this be proven, what if the factory balanced your crank better than someone elses ?

It's all up to the machinest, had my tyres balanced the other week, didn't seem right above *0 mph, took the car back, 20gms out at the front and 60gms at the back.
Same place, same machine different operator !!!!

Pot luck sometimes

No hope...just doom and chance...:devil: