posted September 07, 2009 07:04 AM
Swingarm Angle?? I thought that you were supposed to avoid the swingarm angle going "negative". But yet, when I look at video of the fastest bikes out there, they all go negative when they launch. They look to be about dead parallel to the ground when the rider is on them, static. Anyone have a quick primer on this?
posted September 07, 2009 07:21 AM
The arm is not supposed to be static negative is the only rule I have ever heard of.
____________
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
posted September 07, 2009 07:30 AM
Edited By: Shane661 on 7 Sep 2009 15:33
quote:All the ProSport & ProStreet Bikes are level then go negative!!!
Here you can see that the angle, at most, becomes roughly parallel to the ground on launch:
The bike gets good traction now, but I'm trying to get an idea of the "best" setups and the theory behind it. From the above vid, it looks like it is squatting pretty good and getting low down on the launch. Right now I don't have any clearance issues, either.
posted September 07, 2009 07:51 AM
Your bike does not look to squat much at all.
____________
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
posted September 07, 2009 07:55 AM
Edited By: Shane661 on 7 Sep 2009 16:09
quote:Your bike does not look to squat much at all.
Looks like a couple of inches to me...but I'm not sure I have much room left, clearance-wise. The second vid is a better example. I think the first vid is such a soft leave that it is not doing much at all. With the Penske, I don't think it is going to squat as much as the stock shock...and I know I don't have clearance for it to do so!!
Needs a job
PMRA / TMRC Super Street 4022
Posts: 3745
posted September 07, 2009 10:20 AM
Look at the photo to the left.
Static with a level on the arm...., its dead level.
____________
42 Wins
21 Runner-ups
2010 TMRC Super Street Points Champion
2010 PMRA Super Street #3 Points
2009 PMRA Super Street Points Runner-Up
6 Time Centerville Dragway Points Champion
Sponsored by:
Scorpion Helmets
Galfer Braking
AMSOIL
Steve's Speed Shop
Kawasaki Sports Center
Mickey Thompson Tires
Catalyst Racing Composites
Conway Cycle
Syed Leathers
Needs a job
PMRA / TMRC Super Street 4022
Posts: 3745
posted September 07, 2009 10:21 AM
The front of your swingarm should be lower.
do whatever it takes to get it there........
____________
42 Wins
21 Runner-ups
2010 TMRC Super Street Points Champion
2010 PMRA Super Street #3 Points
2009 PMRA Super Street Points Runner-Up
6 Time Centerville Dragway Points Champion
Sponsored by:
Scorpion Helmets
Galfer Braking
AMSOIL
Steve's Speed Shop
Kawasaki Sports Center
Mickey Thompson Tires
Catalyst Racing Composites
Conway Cycle
Syed Leathers
posted September 07, 2009 10:24 AM
I appreciate the advice, Nox. I was just wondering...do you think it is possible to read somewhere the "why" of this?
I am not doubting you for a second, I just sure would like to know the "why it works" part.
Needs a job
PMRA / TMRC Super Street 4022
Posts: 3745
posted September 07, 2009 10:43 AM
also, look how stiff the rear of your bike is.................., by 330, you have no rebound working for you.............
____________
42 Wins
21 Runner-ups
2010 TMRC Super Street Points Champion
2010 PMRA Super Street #3 Points
2009 PMRA Super Street Points Runner-Up
6 Time Centerville Dragway Points Champion
Sponsored by:
Scorpion Helmets
Galfer Braking
AMSOIL
Steve's Speed Shop
Kawasaki Sports Center
Mickey Thompson Tires
Catalyst Racing Composites
Conway Cycle
Syed Leathers
Needs a job
PMRA / TMRC Super Street 4022
Posts: 3745
posted September 07, 2009 10:44 AM
quote:Thats what happens when you buy a custom shock shorter than OEM...
that is only part of it........., many variables........
____________
42 Wins
21 Runner-ups
2010 TMRC Super Street Points Champion
2010 PMRA Super Street #3 Points
2009 PMRA Super Street Points Runner-Up
6 Time Centerville Dragway Points Champion
Sponsored by:
Scorpion Helmets
Galfer Braking
AMSOIL
Steve's Speed Shop
Kawasaki Sports Center
Mickey Thompson Tires
Catalyst Racing Composites
Conway Cycle
Syed Leathers
Needs a job
PMRA / TMRC Super Street 4022
Posts: 3745
posted September 07, 2009 10:45 AM
quote:
quote:Your bike does not look to squat much at all.
Looks like a couple of inches to me...but I'm not sure I have much room left, clearance-wise. The second vid is a better example. I think the first vid is such a soft leave that it is not doing much at all. With the Penske, I don't think it is going to squat as much as the stock shock...and I know I don't have clearance for it to do so!!
Shane
Make the clearance........, period.
____________
42 Wins
21 Runner-ups
2010 TMRC Super Street Points Champion
2010 PMRA Super Street #3 Points
2009 PMRA Super Street Points Runner-Up
6 Time Centerville Dragway Points Champion
Sponsored by:
Scorpion Helmets
Galfer Braking
AMSOIL
Steve's Speed Shop
Kawasaki Sports Center
Mickey Thompson Tires
Catalyst Racing Composites
Conway Cycle
Syed Leathers
posted September 07, 2009 11:12 AM
Edited By: Shane661 on 7 Sep 2009 19:19
I can see where I could do a lot more with it, if it was a dedicated drag bike. Right now I have certain constraints, due to lsr/street rides. Probably loosening up the preload a little, and adding some more rebound damping would keep it planted longer and more solid.
It's not much of an issue at my local track since it is so well -prepped. I can't imagine my stock motor bike spinning on the big end!!
posted September 07, 2009 01:01 PM
Ive been working with a straight link on my 14. I thought it wasnt gonna give me any good results at 1st. But now i got it set , Its working. Bike isnt faster in the 60ft. But i know thats me (clutch hand). But ive run my fastest 8th and 1\4 so far. 8.61, stock engine with nitrous. 220 naked. If you get the sidewinder and flat pan, you can lower the front to compensate. I dont see any benifits by going lower in the back without these. Youll just scrape your exhaust and stock pan up.
posted September 07, 2009 01:38 PM
Edited By: Shane661 on 7 Sep 2009 21:38
With the slow rebound circuit on my drag shock, I would think it wouldn't have to squat quite as much to accomplish the same goal. In other words, it will not need a lot of travel since it can be set to return so slowly.
I'll have to take some video and experiment. Good info in this thread, thanks again everyone.
Needs a job
PMRA / TMRC Super Street 4022
Posts: 3745
posted September 07, 2009 09:13 PM
Bike should be still lifting at the 1320.........
____________
42 Wins
21 Runner-ups
2010 TMRC Super Street Points Champion
2010 PMRA Super Street #3 Points
2009 PMRA Super Street Points Runner-Up
6 Time Centerville Dragway Points Champion
Sponsored by:
Scorpion Helmets
Galfer Braking
AMSOIL
Steve's Speed Shop
Kawasaki Sports Center
Mickey Thompson Tires
Catalyst Racing Composites
Conway Cycle
Syed Leathers
HOME
NEW TOPIC
posted September 07, 2009 07:04 AM
Edited By: 
