Mine turned 7 full rotations before i met any resistance, turned it back a touch, pinched it off , started it up and it whined like crazy adjusted it with the motor running a fraction more and its fine

 

Can you post a pic of where the shaft is? I have a 87 CBR 1000f and would love to docit as well but I am not sure where the shaft is on the bike.

 

Take a look in the 'How To' section. Dylan wrote a good guide with pictures. But it's located low down on the right hand side of the bike towards the front of the engine , you'll need to remove the lower right fairing if you have them to see it. Here it is :- https://cbrforum.com/forum/how-tos-8...stment-107818/

 

Thank you. Ya I tried to find the DIY but wasn't able to for some reason. Right bow my CBR is in the shop getting a tune up. Ivtold them about it but idk if they will do it.

 

After reading through your posts..... and as I am going to give my balancer shaft a touch...

What I understand, looking at the parts catalogue and the diagrams is the manual, is that the balancer shaft acts like an axle for the roller bearings of the balancer weight.

So I just can't get the point of rotating the shaft counterclockwise until it stops... because it will not stop (unless there is a kind of a notch/catch on the other side - don't have any more photos..).... as far as I can see the balancer shaft is placed in the crankcase, allowed to rotate freely until the pinch bolt on the balancer holder clamps it..

I cannot understand the reason for which the balancer shaft should ever stop rotating as it is just an "axle".....or.... do I get something wrong here??

Therefore adjustment of the backlash is not going to reduce the engine vibrations significantly but will definetely make the meshing gears last longer....

To adjust the mesh, I would just rotate the shaft counterclockwise by one turn, it will make the teeth of the balancer gear rest upon the teeth of the crankshaft balancer gear, then I would go back by hmmmm 1 mm....., perhaps it would be too far even???

and this is perhaps what happens when you adjust with the engine working hot, looking at the way it works when you adjust it while the engin is running, I would even say it is a proper way to do it.... once it starts whining, back off until it whines no more

 

looking at the way it works when you adjust it while the engin is running, I would even say it is a proper way to do it.... once it starts whining, back off until it whines no more

correctamundo

 

Guys, I just thought it over again, and it can't be like that, I mean I was wrong.. the shaft must have sth to do and it is not just a 'simple axle' as I thought, because if it were, the wouldn't be any point adjusting it....

damn, I must get my hands over one... another guess why it might stop.. perhaps the journals of the shaft are off center??? and when the wear increases it causes the shaft to rotate on adjusting since the mesh is not tight enough for the teeth to 'clash' at a given point??? it would also explain why the manual advises to find the exact spot at which the shaft can be removed from the crankcase...... if so, it can tell you something about the condition of your engine... once your balancer shaft refuses to stop... I believe, more than 100.000 km on your engine is very likely...

sorry for my ignorance, my english is not perfect, but you guys wrote something about eccentric bearing.... just checked it in the dictionary, the meaning is off center... so now I believe I get it...

 

Only as complicated as you think it to be.

That said

It's just a counteracting balance weight on an axle driven from the crank.
Where you "set/adjust" that weight through the adjuster determines the
counteracting/balancing postion of the weight in relation the to rotation
of the crankshaft - simple physics equal and opposite forces and all that
jazz...

The weight as you can see is quite apparent here

This is an actual crank balancer from an 87 Hurricane

 

How can mesh adjustment affect balancing?? The manual says that there are index marks to place the weight at, and what you do with the shaft later on is just changing the backlash.... so it would mean that the weight is always "in balance" and the changes made to the backlash, should not affect its action too much... unless the backlash is really messed up, but again you hear the whine...

 

A nice reference document on the subject

LINK