Wheelie
Needs a life
Old Man
Posts: 6902
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posted October 05, 2009 06:29 AM
Braced Swingarm?
im going to order a Velocity Racing swingarm thats 12" over, is the underbracing loop needed?
wee
  
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CrotchRocket
Moderator
Bracket Racing with Betsy
Posts: 8038
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posted October 05, 2009 06:44 AM
I would get a MacIntosh if you like those arms!!!
Wee, stock motor ?...NO
Motor work ?...I stil say no!!!
____________
Jason Miller StreetBike Seminars
*****DragRacers do it better, because they dont cut Corners*****
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Shane661
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posted October 05, 2009 06:55 AM
 Edited By: Shane661 on 5 Oct 2009 14:58
Personally, I think the underbracing is cheap insurance. For me, I need to lean the bike at 190+ mph in my LSR venue, so there was not a question. Especially since mine is a modified stock arm. Even with bracing, my arm was only 4.5 lbs heavier than stock.
10 people will give 10 different answers, and it depends on the type of arm as well. Are you expecting it to take cornering loads? At 12" over, I doubt it.
I see a whole lot of very fast drag-only bikes without the bracing.
Shane
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Wheelie
Needs a life
Old Man
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posted October 05, 2009 07:18 AM
I pm'ed McIntosh,
wee
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Wheelie
Needs a life
Old Man
Posts: 6902
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posted October 05, 2009 07:19 AM
maybe Schnitz can get me a great price on a swingarm?
wee
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Shane661
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posted October 05, 2009 07:24 AM
If you call McIntosh you can often talk directly to Terry. He'll tell you exactly what you need, and what you don't need for your application.
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Bently
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2012 14r In Blue and no Mods!
Posts: 5428
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posted October 05, 2009 07:55 AM
I have 3 buddys with 08 busa and the all have velocity arms real nice arms IMO. 2 are 6 to 9 over and niether run under bracing and the one guy is 280lbs in gym shorts and runs the piss out of it. 60ft 1.51 and runs 9.59's not shabby for his weight. other guy is 190 and runs 8.90's with 1.45 to 1.48 60fts
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dubious
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posted October 05, 2009 08:21 AM
Edited By: dubious on 5 Oct 2009 16:32
Hmm, contrary to Bently's friends, I have seen some real ugly velocity arms, slots not machined properly, and axle holes off cenetered. just nasty stuff.
Macintosh stuff is metal artwork
I would get a Mac arm, or a trac arm personally, both of which i have owned.
When you get one from Terry, be sure to tell him if you want 6 inch axle blocks, otherwise you will get the standard 4 inch.
Terry will mod the stocker, and also has alumipro, and cromoly arms.
If weight is a concern get the stocker modified though I think
Macintosh:
Trac:
____________
natural selection.....
destiny will overcome intervention.
Some are not worthy of the effort.
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bigwil
Expert Class
06 zx 14 turbo stage 3
Posts: 423
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posted October 05, 2009 08:42 AM
i just got mine from terry last week IMO the best looking arm out there mine is 12 over powdercoated black 6inch ajustment., has roller wheel for the chain 1lb bottle holder nade 1inch lower and rear foot pegs i left them silver came with chain gaurd
ill take more pic if you lk
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bigwil// going fast aint easy so turbo it
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06redzx14
Pro
Posts: 1022
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posted October 05, 2009 09:03 AM
spencer 6-12 stock modified
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06 alien head, no flies, PC+hub, 16/45 44 43, air shifter, dry shot
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kawasakijockey
Pro
Posts: 1876
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posted October 05, 2009 09:15 AM
I like the look of the underbracing. Go for it! Its only money....lol
____________
Get on the shortbus boys 'cause its time to get schooled.
2007 ZX-14
1.38 60ft
9.03 @ 149mph
8.95 @153 small shot n2o
8.68 @160mph 5lbs boost
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Bently
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2012 14r In Blue and no Mods!
Posts: 5428
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posted October 05, 2009 09:18 AM
dubious i have heard the same thing but we are not seeing that. we made a gauge to measure if the wheel is stright in the arm and all 3 velocity arms the chain adjusting marks are right on. the 280 lb guy is on the second season with his and easily has 400 runs on it. But then again I run extensions and sometimes wonder why guys spend the big money on an arm.
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eklipse636
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ZX-14
Posts: 6046
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posted October 05, 2009 09:36 AM
quote:
dubious i have heard the same thing but we are not seeing that. we made a gauge to measure if the wheel is stright in the arm and all 3 velocity arms the chain adjusting marks are right on. the 280 lb guy is on the second season with his and easily has 400 runs on it. But then again I run extensions and sometimes wonder why guys spend the big money on an arm.
i hear ya on that. my extensions have gave me no problem. but then again, im not as fast as a lot of u guys!
____________
Best: 60ft 1.351 1/8 5.68 mph 123.98 1/4
8.89 mph 151.32
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Bently
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2012 14r In Blue and no Mods!
Posts: 5428
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posted October 05, 2009 09:40 AM
I don't think that matters, I've been 9.14 on extensions and wees been faster then that and I'm at 210lbs.
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kawasakijockey
Pro
Posts: 1876
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posted October 05, 2009 09:43 AM
But nobody should trust extensions if they made them for a 12 inch stretch.
____________
Get on the shortbus boys 'cause its time to get schooled.
2007 ZX-14
1.38 60ft
9.03 @ 149mph
8.95 @153 small shot n2o
8.68 @160mph 5lbs boost
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FlatoutBu
Pro
Posts: 1054
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posted October 05, 2009 09:57 AM
Edited By: FlatoutBu on 5 Oct 2009 17:57
I would never buy a arm without underbracing...JMO
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06 Blue 14
9.008 at 153mph @ 195 suited
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kaw-rick
Pro
Posts: 1167
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posted October 05, 2009 12:37 PM
I run 8.60 with extensions.And im 220lbs. Ive seen long grudge bikes with no underbracing. I think id get the strongest they make (material wise). No underbracing.
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Shane661
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posted October 05, 2009 12:42 PM
Edited By: Shane661 on 5 Oct 2009 20:44
The funny thing is...everyone is sweating the underbracing over 2 lbs. and a couple hundred bucks (on a $1k+ swingarm, no less)????
If you are going to turn the bike at speed..look at the design, the leverage, and consider the torsional loading. That is all I can say...
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dubious
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posted October 05, 2009 12:48 PM
Edited By: dubious on 5 Oct 2009 20:49
quote:
The funny thing is...everyone is sweating the underbracing over 2 lbs. and a couple hundred bucks (on a $1k+ swingarm, no less)????
If you are going to turn the bike at speed..look at the design, the leverage, and consider the torsional loading. That is all I can say...
+1 completely agree here Shane! 
Last thing you want is a bike that twists and steers you to the wall.
Bently, I am not trying to discount your experience, just stating what I have bro....
____________
natural selection.....
destiny will overcome intervention.
Some are not worthy of the effort.
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Bently
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2012 14r In Blue and no Mods!
Posts: 5428
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posted October 05, 2009 01:26 PM
Oh I know dubious, I've heard what your saying as well, maybe they ship all the good arms to Iowa, LOL
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CrotchRocket
Moderator
Bracket Racing with Betsy
Posts: 8038
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posted October 05, 2009 02:07 PM
The under bracing is just added strength to prevent flex...
The big name swingarms have been tested to prevent any kind of problem or breakage mostly without BRACING...Their name is on the line !!!
The real long Grudge Bikes with the little skinny arms are Chromemoly, extra strong!!!
____________
Jason Miller StreetBike Seminars
*****DragRacers do it better, because they dont cut Corners*****
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kawasakijockey
Pro
Posts: 1876
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posted October 05, 2009 02:44 PM
Wheelie, why not an Adams chromoly arm? They are supposedly a bit lighter than the aluminum arms.
____________
Get on the shortbus boys 'cause its time to get schooled.
2007 ZX-14
1.38 60ft
9.03 @ 149mph
8.95 @153 small shot n2o
8.68 @160mph 5lbs boost
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Wheelie
Needs a life
Old Man
Posts: 6902
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posted October 05, 2009 02:50 PM
quote:
Wheelie, why not an Adams chromoly arm? They are supposedly a bit lighter than the aluminum arms.
I know someone that had a failure, they had a weak spot and corrected it, how many are still running the bad design? I wouldnt but anything Adams. im getting a Velocity or Macintosh
wee
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KZScott
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high on speed
Posts: 7235
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posted October 05, 2009 03:13 PM
Doug Ray advised me that underbracing on an extended stock arm(12 over) that the bracing wasnt really required until i had 275 hp when drag racing. leaning the bike over as stated above is different...
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00 ZX-12R 8.62 @ 165.2 no bars, slicks, Pump Gas, 55 shot.... turbo 8.32 @173
00 ZX-12R Fastest NA Kawasaki in the world 1: 222.046 1.5: 226.390 Loring AFB
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smokinZX14
Needs a life
Posts: 10197
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posted October 05, 2009 03:19 PM
Macintosh and have it braced......... That is all i'm saying ...
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Smokin Performance Cycles..
Tampa Bay , FL .. Brocks Performance Dealer ..
Gen 2 ZX14R Best ET 8.43 , Best MPH 164.95
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