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  #1 (permalink)  
Old 12-03-2010, 07:30 PM
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bouncing front end

SMW ultima 113, 6speed and open primary.. its a softail.. not a springer.. When i really twist on the throttle to make it move it wants to bounce in the front a bit.. it's basically all new..i have put about 5o miles on it. went to give it a lil gas to see what kinda power it had. got around 4000rpms in 2nd and 3rd and it feels like it's pogo in the front.. ??? any ideas on this one?
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Old 12-03-2010, 07:42 PM
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little mini wheels or
wrong weight or amount of fork oil (doubt)
next time you do it see if the front end is topping out
how much rake and what fork extention ?
what up, out and stretch on the frame ?
and what is the wheel base ?
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Old 12-03-2010, 08:07 PM
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8 up 6 out.. 44 rake i think.
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Old 12-03-2010, 08:08 PM
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it's about 9 1/2 ft long
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Old 12-03-2010, 08:24 PM
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well there it is
with that up and out you are light on the front to start with so any hard excelleration is going to lighten it even more and result in less traction and the front will bounce / float and in general be less responsive.
if you take the weight of the front and the rear you will see what i mean
its probably in the 60/40 range back to front at best and transfers another 10% under hard acceleration. 500 lb bike with 150 lbs on the front = little mini wheelies.
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Old 12-03-2010, 09:25 PM
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so, is it safe? the response is still okay.. just didn't know if something was gonna fall apart! It seems like lil mini wheelies now that you mention it. I figured with the wheel base that long it wouldn't be an issue. . wondering what it will be like when i twist the throttle all the way.. it was bouncing with 3/4 throttle
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Old 12-03-2010, 10:03 PM
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you just gotta get use to riding it. full throttle and its gonna feel like the tire is barely on the pavement and it is. Sometimes its hard to tell if the wheel is off the ground or not. If you think the wheels off the ground back off the throttle REAL easy.
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Old 12-04-2010, 03:42 AM
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Quote:
Originally Posted by RedWings View Post
you just gotta get use to riding it. full throttle and its gonna feel like the tire is barely on the pavement and it is. Sometimes its hard to tell if the wheel is off the ground or not. If you think the wheels off the ground back off the throttle REAL easy.
i agree with redwing you need to get use to it. it will be a adrenalin rush for a while. be careful with the throttle on and going around corners
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Old 12-05-2010, 12:16 AM
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How about your Neck bearings did you tighten em down to set em then back it off a bit?
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Old 12-06-2010, 10:54 AM
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It's not that the power is it i don't think. It's like a point of hitting the throttle that makes the front feel like it's bouncing... hell might be the power.. doesn't seem like it would make the front pull at 3/4 throttle prob.. 3800-4000 rpm.. I'm gonna keep riding and see how it feels once i get it broken in and can really hit it.
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Old 12-13-2010, 05:41 AM
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what weight oil are you using? also did you balance the front wheel? Those will make a difference.
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Old 12-13-2010, 05:58 AM
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Is this happening under hard acceleration coming off the line? Does it occur in all gears or just 1st/2nd? Or, does this occur in all gears in the rpm range of 3800-4000?
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