Has anyone tried leaving it out and if so what was the result?
Unknown Disorder
Has anyone tried leaving it out and if so what was the result?
Weekend cruiser
I believe Gavin V did, I think you will find a lot of vibration
Unknown Disorder
Enough vibration that he put it back in?
Tempted to leave it out and see what happens in any case. If it's unrideable I can always tear the engine to bits again.
In the riders seat
There's one or two down here minus the balance shaft, the vibration isn't that bad that anyone put it back in, personally if I was taking it out I would balance the crank
"If you can make black marks on a straight from the time you turn out of a corner until the braking point of the next turn, then you have enough power."
Originally Posted by scracha
Unknown Disorder
Thanks for that. I'll leave the balance shaft on the bench then. At worst I can use the bike to make milkshakes for my lunch.
Long Haired Yobbo
Na, It can be worse than milkshakes.
It probably won't matter so much on a bike as small as an FXR but if it has been on a severe diet it may mean things have to be made thicker (heavier) to stop them fatiguing, thus negating any gains.
Also it could have an effect on mainbearing life and the like.
Heinz Varieties
Unknown Disorder
Well the cases are together with the balancer left on the bench for now. If it's too bad I'll pull it back down and stick it back in.
I'll let you know how it went after the next Mt Welly meet, before then if I start it up post assembly and the bike tries to walk out the door by itself.
Unknown Disorder
Ok so that didn't work. Runs OK revs happily to the limiter BUT so vibey through the bars that you can kiss goodbye to anything over about 10grand on the tacho.
Engine will be coming to bits again next week so it can go back in.
In the riders seat
Why not just rebalance the crank?
"If you can make black marks on a straight from the time you turn out of a corner until the braking point of the next turn, then you have enough power."
Unknown Disorder
No time or budget right now. Probably would have been the thing to do.
Forum whore
Its real easy to balance the crank your self. There is a whole lot on the Team ESE thread about balancing single cylinder cranks, with, why and what to do, trawl through the pictures to find the posts. The balance factor is probably 50% now, and the balance shaft makes up the other 50.
Me, I like balance shafts. But if you want to run without one, you could try a 60% crank balance factor for starters and move on up 62-65-68 etc until the vibration is acceptable.
I have read in the advertising blurb that the latest 4-Stroke Kawasaki MXr's are 62%, and that they were 60% in 08. Another short cut to a good starting point would be to measure the balance factor of any of the Honda singles CB,SL,XR 100,125,175 etc.
I have also heard of bolting washers onto the flywheel untill the vibration is acceptable, as a way to find the balance factor needed.
Unknown Disorder
I'll just put it back in for now.
Heard about a number of people who have tried and failed with the same mod today, wish I'd been told a month ago, never mind you live and learn.
Forum whore
i've taken a few out, never put them back in, all engines and cranks quite different though. run softer grips lol
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Unknown Disorder
I don't think softer grips would do the trick. Could only ride it by running a gear higher and forgetting anything over about 10 grand. Be in the garage over the next week or so putting it back in.
Forum whore
wow, must be very very bad!!!try balancing it. not to hard.
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