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Post by captain chaos on Mar 18, 2015 7:56:00 GMT
Yes. Done a few as well, the current one (EFE with Slingshot 750 forks and ZX9R back end) was a little twitchy at the end of last year, turned out to be loose swingarm bearings. Adjusted/modified it and now it's perfect.
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Post by arttu on Mar 18, 2015 8:52:03 GMT
Having done 3 gsx's & 4 gs's with modern suspension as well as a couple of elderly Kawasaki's & never had the need for a steering damper I still think there is a problem somewhere
Well, I didn't mean that shorter front end will instantly turn them unstable. But less stable for sure Though I have to admit I have never bothered to measure / calculate how much these typical modifications actually change the rake and trail. Back in the days when my GSX had stock suspension it was just impossible to get it wobble or do anything unexpected. Then I swapped in GSX600F front end with 17" wheel which is pretty close to original height but total drop was still maybe 5-10cm. During first test rides I noticed that bike started wobble if I let loose the bars or even hold them lightly. Luckily just installing a new tire fixed that. Later on I swapped to GSX-R USDs which dropped the front end a couple additional centimeters but rear dropped about the same due to lower profile tire. That was completely fine until I got enough power to pull wheelies at 200km/h When landing it wanted to wobble which was slightly scary. Longer swingarm cured that almost completely but sometimes it still feels little shaky at high speeds.
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Post by bluedog59 on Mar 21, 2015 13:17:58 GMT
If you feel that you would like to fit one, then fit one. It's you that's going to be riding it. A stock bike may be very stable but throw in shorter forks, lighter wheels and more power and things can change quite a lot (for the worse in terms of stability). Showing Mr Higham's drag bike without one is fine apart from drag strips tend to be a lot smoother than public roads. If you want an example. My B12 has USD's (with stepped yokes to maintain the ride height), light PVM wheels and AP discs. All was fine apart from the time the front wheel started skipping over a set of bumps under power and I found myself doing 80mph+ on my arse thinking "I'm sure I had a bike under me a second ago". Regarding fitting one, I think you should be able to find someone who makes a fitting kit or copy the tidy example Arttu has shown.
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Post by atshed on Mar 21, 2015 15:46:07 GMT
If you feel that you would like to fit one, then fit one. It's you that's going to be riding it. A stock bike may be very stable but throw in shorter forks, lighter wheels and more power and things can change quite a lot (for the worse in terms of stability). Showing Mr Higham's drag bike without one is fine apart from drag strips tend to be a lot smoother than public roads. If you want an example. My B12 has USD's (with stepped yokes to maintain the ride height), light PVM wheels and AP discs. All was fine apart from the time the front wheel started skipping over a set of bumps under power and I found myself doing 80mph+ on my arse thinking "I'm sure I had a bike under me a second ago". Regarding fitting one, I think you should be able to find someone who makes a fitting kit or copy the tidy example Arttu has shown. Yep will be fitting . Good to have a straightforward response . Seems difficult to get simple answers to simple questions here .
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