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Discussion Starter #1
Hi all,

Having a bit of fun with my 10 at Phillip Island last week, and finally decided to try and tame the handling a little.

At the moment, when I change up gears down the main straight at full noise, it does a little headshake each time. I haven't consciously changed geometry (although the ex-BSB frame is new so possibly running a little more rear ride height. Pretty sure it was doing it before the frame change.

I have a set of adjustable offset triple clamps, and was thinking about swapping over the offsets to get some more trail. Does anyone have any other thoughts as to why it might be doing this ?

Suspect this is geometry rather than suspension setup.

Thanks,
Brian
 

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I don't know if anyone here is running a BSB frame which I'm sure is vastly different from a stock frame. Have you checked the British forums for info from someone using that frame. The stock Gen 4 needs some more rear ride height it doesn't headshake but tends to run wide on corner exit. Other than that the stock dampner needs a rebuild to work properly. Perhaps turn the dampner stiffer a bit may do the trick or have it rebuilt if you haven't done that yet.
 

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Discussion Starter #3
Thanks mate, fairly sure geometry is mostly the same (although linkage pivot point has been moved). Have done some work on the steering damper myself, soldered up the hole in the needle and turned / cleaned it on the lathe. Think I'll be trying the offsets first and see what happens; pain in the bum pulling the front end off, but I have the parts so at least no cost to it !

Cheers,
Brian
 

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Thanks mate, fairly sure geometry is mostly the same (although linkage pivot point has been moved). Have done some work on the steering damper myself, soldered up the hole in the needle and turned / cleaned it on the lathe. Think I'll be trying the offsets first and see what happens; pain in the bum pulling the front end off, but I have the parts so at least no cost to it !

Cheers,
Brian

Trying the offsets first sounds like the best Idea. Hopefully that will solve the problem. Yes its a pain to pull the front end apart but the results will probably be worth the effort. :grin2:
 

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I'd highly recommend that you put a Scotts (in Europe called Ohlins rotary) Stabilizer Damper on that bike Right Now.
 

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A slight headshake when accelerating is normal. I just watched a video I took of a session at a recent track day, I didn't even realize my track bike (GSX-R 750 L2) had been doing a little mild headshake when exiting turns under power. Camera shows it but never noticed it whilst riding. Gen 4 does it too.

Now if it is just plain ornery and unstable, that's a different story, you aren't giving a lot to go on.

But obviously if something has changed and the bike is scaring you, need to figure out why.

I have gotten that same bike to get really out of shape before, incipient tankslapper territory, being too crazy on the gas, power wheelies in 1st/2nd gear it will misbehave, but that was sloppy riding.

Cannot really diagnose or cure on the Internet, ride carefully until you sort it, then continue to ride carefully as no bike is "tankslapper-proof."
 

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I'd highly recommend that you put a Scotts (in Europe called Ohlins rotary) Stabilizer Damper on that bike Right Now.
Better put something on it, need some kind of good damper for sure. I just don't hold with radical solutions right off the bat, tearing the whole front end off and changing up things is not likely to help. Especially since the torque on the steering head has a huge effect on this and that alone might cure it (torque steering bearings). Good luck with it.:wink:
 

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Discussion Starter #11
I lowered the rear and helped inmensly...
Thanks mate, plenty of ideas to try. Have decided that my first step will be to do nothing ... I was running new rearsets in an uncomfortable position, and quite possibly was putting more effort into the shifting due to the angle - it's possible that may have upset the bike, so since I've gone back to the previous rearsets anyway, I'll be riding later this month with the bike as is - will report back.

Cheers,
Brian
 
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