Death Wobble...
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From: Cental, MI
Edit; I certainly do Not use the same setup Drag Racing, as I use for Rodeo Games!!!!!
Last edited by Racepres; Aug 16, 2023 at 03:09 PM.
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From: Poolville
I've seen a few drag bikes and it appears to me that the trail would be at least 7", maybe more..
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From: Cental, MI
Depends on the class...etc... but yes...6-7 is Probably Minimum!! Over 150...maybe more!!
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From: Decatur, Alabama
Good info on laying on the tank with the wobble. I never had issues with my 1998 RK until I converted from EFI to carb. I noticed significant increase in power which is what I contribute the sudden wobble around 90 - 100 mph if I get on it a bit. Never had decent power in 5th gear before. I noticed the wobble was less prominent if I eased it up to speed. All the sudden I'm dealing with the wobble on the highway where I wasn't before so I appreciate you sharing the info. Will try it out. I don't really care about speed but I do want to feel safe and be able to keep up on the highway.
carl
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From: Cental, MI
Yes...and that it decreased the tree quite a bit..
Also, OP wants the Faster handling...so be it!! I would also on a Rodeo (trick) Bike!!!
Also, OP wants the Faster handling...so be it!! I would also on a Rodeo (trick) Bike!!!
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From: Poolville
No I always had a little even with the stock FL front end at about 115 mph but it was minimal and I could push through it easily..
2" over really doesn't change the trail any.. A stock FLSTF has 6.2" of trail which is very stable at higher speeds.. Most FX's are at our below 4.8". The reason for the change in trail of 1.4" on my bike was because the stock FL triple trees have an offset of 1.45" and the FX triple trees have 2.5".. This is what changed my trail and my stability at speed..I might go back to the FL trees..
2" over really doesn't change the trail any.. A stock FLSTF has 6.2" of trail which is very stable at higher speeds.. Most FX's are at our below 4.8". The reason for the change in trail of 1.4" on my bike was because the stock FL triple trees have an offset of 1.45" and the FX triple trees have 2.5".. This is what changed my trail and my stability at speed..I might go back to the FL trees..
Last edited by 98hotrodfatboy; Aug 16, 2023 at 05:44 PM.
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From: la la land jerzey
Hondas Marc marques 8 time world champion in moto GP has had an issue this year with the bike becoming loose and crashing when the other manufacturers are not it in the turns - yea its a 300 HP V4 and its not apples to apples _ but its wind and how you use it - the english guy was spot on - motoGP is over 200MPH and they are 60 plus degrees in the turn angle at real hi speeds — the wind is in play yes a bit more in head snugging to the point it wont fall away to the stop when checking it - could be the answer but wheel weight is also in play air pressure is in play - Harley stuff it dump ruck weight compared to hi speed stuff
be careful the street pavement is un forgiving and its not the same material as a track bore is it not float like a track and your tires are not hot and the rubber is different -
coming off the machine at road racing speeds with out riding gear compared to a set of flip flops and a t shirt is worlds apart
be careful the street pavement is un forgiving and its not the same material as a track bore is it not float like a track and your tires are not hot and the rubber is different -
coming off the machine at road racing speeds with out riding gear compared to a set of flip flops and a t shirt is worlds apart
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Joined: Jul 2014
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From: Cental, MI
No I always had a little even with the stock FL front end at about 115 mph but it was minimal and I could push through it easily..
2" over really doesn't change the trail any.. A stock FLSTF has 6.2" of trail which is very stable at higher speeds.. Most FX's are at our below 4.8". The reason for the change in trail of 1.4" on my bike was because the stock FL triple trees have an offset of 1.45" and the FX triple trees have 2.5".. This is what changed my trail and my stability at speed..I might go back to the FL trees..
2" over really doesn't change the trail any.. A stock FLSTF has 6.2" of trail which is very stable at higher speeds.. Most FX's are at our below 4.8". The reason for the change in trail of 1.4" on my bike was because the stock FL triple trees have an offset of 1.45" and the FX triple trees have 2.5".. This is what changed my trail and my stability at speed..I might go back to the FL trees..
Harley even Knew they had a Problem waayyy back when they introduced the DuoGlide... all FL trees since have been de-raked about 3 degrees...to gain some (needed) trail.... Proper Trail numbers are Vital to be Matched to the Intended Usage! "Universal" means, not correct, for any, but, maybe good enough.
Now...just for grins, What is the Built in rake-derake of those trees...and also of course...what is the Offset? May be revealing!!! Thanks
Last edited by Racepres; Aug 17, 2023 at 07:38 AM.
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From: Poolville
The trees are at 0°, the neck numbers vary from what research I can find but assume it's set at 31°.. the only way to really know is to laser it and actually measure the trail.. Once that number is identified I can calculate the take to the exact degree,.. Offsets, tube lengths, tire diameter, triple tree height and wheel base are all measurable to put into the equation to help me determine exact tasks but I'm really not concerned about that.. I really need my trail at a minimum of 6"... Also you need to remember the fork length raises the whole bike it will not change the relationship of rake to trail...