serius blk
Zone Head
Posts: 543
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posted July 07, 2011 06:44 AM
need help on swb wheelies issues
Im 245 have the bike geared 16/40 lowered 1.5in in the front and have the rear lowered 2in. I have a revalved shock and straight link from when it was 12 over. Ive played with having the strap fully tight,1/2 and 3/4. None seem to help. Once the bike reaches 8k the front wheel is on its way up. Ive adjusted my rear shock. I dont know what else i could do. Maybe lower it some more in the front maybe. This is new to me racing swb. I cant get to full throttle without looking in the stands or stars. Anybody have any advice
  
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Beondwacko
Expert Class
Posts: 393
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posted July 07, 2011 06:53 AM
I have a very similar set up as you do but I weigh in at 50 lbs less and I'm running the stock shock (195lbs in street clothes) and I know what you are going through. I have to "roll" on the throttle to keep the front end down in first too. If I'm at WOT in first gear below 7K rpm, when the rev's climb, so does the front end. My trick is to try not to go WOT until about 8.5K rpm. It's gotten my 60' times down to a not so impressive 1.63 but that's not terrible either.
The heavier we are as a rider, the more difficult it is to keep that front end down.
____________
08' Atomic Silver, PCIII, Brocks pipe,BMC, -1, strapped front end
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serius blk
Zone Head
Posts: 543
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posted July 07, 2011 07:02 AM
yes i do understand. Im laying on the front tank But if small guys can do it. We should be able. My best so far is 1.66. Someone knows what it takes.
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NINJA12
Needs a job
Posts: 3310
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posted July 07, 2011 07:52 AM
Are you sliding back in the seat?
That can make a big difference, but the zx14 is a hand full for anybody at SWB.
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serius blk
Zone Head
Posts: 543
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posted July 07, 2011 07:59 AM
no ive been griping the tank with my knees and trying to lean my wait forward
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Shane661
Needs a life
Posts: 11494
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posted July 07, 2011 08:37 AM
16/40 is a lot of gear for swb. Many guys run 17/40.
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THEMADKAW
Expert Class
Posts: 211
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posted July 07, 2011 08:46 AM
i'm around the same weight and running 16-41, have pretty much the same problem. i average 1.63 60' times. my best is 1.60. I'm going to go back to 17-41. I spoke with Brock sometime back at Rockingham, and he says it'll still carry my weight and pick up with that or 17-40. so I'm gonna try it next trip to the track.
just thought it may help you too if you got extra sprockets layin around
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Nelson Taylor
Zone Head
Posts: 927
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posted July 07, 2011 08:49 AM
Like Shane mentioned go with 17/40 or the stock 17/41.......
Sounds like you have set the bike up already with everything you can. You could add some ballast up front. Truth be told you're gonna have to slide that clutch a just a hair longer to get that thing moving without lifting the wheel too high and too fast.
____________
Best #'s
1.54
4.03
6.02 @ 121mph
(Stock Wheelbase) 2006 ZX14
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serius blk
Zone Head
Posts: 543
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posted July 07, 2011 09:51 AM
yea i may try that. Hey nelson how low was urs in the front
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smokinZX14
Needs a life
Posts: 10197
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posted July 07, 2011 11:17 AM
17/40 will help fix your problem ..I never could hold the front end down with a 16 tooth ..
____________
Smokin Performance Cycles..
Tampa Bay , FL .. Brocks Performance Dealer ..
Gen 2 ZX14R Best ET 8.43 , Best MPH 164.95
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Seno
Pro
BANNED FOR LIFE!
Posts: 1230
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posted July 07, 2011 11:30 AM
I'm at 16/43 245lbs... Have no wheelie issues, gain 50 lbs and youll be set!
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2012 Black 14R -> Completely done!
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serius blk
Zone Head
Posts: 543
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posted July 07, 2011 01:13 PM
i think i found out the problem. I had the coil in the front forks tight. Ive had it this way for yrs. The bike would rebound hard everytime even bounce with the strap on it. I turned the adjustment fully. So its soft and guess what. The bike stays on the ground. Ive tried it a few times on the street but going to the track tommorrow. I never thought about cking that.
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eklipse636
Needs a life
ZX-14
Posts: 6046
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posted July 07, 2011 03:25 PM
If you have the strap pulled down snug in the front that shouldn't matter.
If the strap didnt help on the wheelies, I don't know what to tell you.
I did my best 60fts at swb with stock gearing. I tried 16t front and it wheelied too easy
____________
Best: 60ft 1.351 1/8 5.68 mph 123.98 1/4
8.89 mph 151.32
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Quarter Pounder
Pro
with Cheese
Posts: 1069
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posted July 07, 2011 04:43 PM
let's look at the physics of what is going on.
Your rear axle is the pivot point of the wheelie...as the bike squats the CG lowers. If you are 245, that is a lot of weight that is way above the CG and all it wants to do is rotate back up and over the pivot point.
You need to be as far forward as possible (as in your helmet should be nudging the windscreen), your rear suspension needs to squat and stay there...front end should be strapped tight.
Your gearing also needs to go back to the 17 front. Adjust with the rear sprocket if needed by going up a tooth at a time.
I ran 17/40 on mine and wheelies were never an issue for me. BUT, you riding style will vary that big time.
____________
SWB 2008 ZX-14
9.19 @ 151
5.98 @ 123
1.53 60'
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CrotchRocket
Moderator
Bracket Racing with Betsy
Posts: 8038
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posted July 07, 2011 05:42 PM
quote:
16/40 is a lot of gear for swb. Many guys run 17/40.
Yep...If I were you, i'd have 17-41 during the cold & put a 42 on in the heat & put the Brocks .180 spacers on the clutch springs...
____________
Jason Miller StreetBike Seminars
*****DragRacers do it better, because they dont cut Corners*****
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Slowninja
Expert Class
Slow-ride
Posts: 189
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posted July 07, 2011 08:22 PM
Tighten the compression on the shock up. Soft = wheelies hard = spinning. You want to find that happy medium.
You may also try either lowering the front or raising the rear. Changes the suspension geometry.
Ballast is another idea.
I've cut 1.54 on my swb setup, but i have an ohlins shock and some other tricks. That was 16/43. I'm actually going back to stock gearing to see if anything changes.
But, i'm also 160 lbs.. lol
____________
06 zx14
SWB
9.24 @ 148
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serius blk
Zone Head
Posts: 543
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posted July 07, 2011 08:34 PM
thank u fellas i will try all of what ive been told. I tried the 16/40 i was running and the bike didnt come up. I went to 16/41 and its coming up at the top of first. So back to 16/40 i go. Adjusting the front actually did alot. It made the front of the bike heavy. Im going to adjust the rear and see what else happens. Thank fellas
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BobC
Pro
Posts: 1736
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posted July 08, 2011 12:42 AM
 Edited By: BobC on 8 Jul 2011 08:48
quote:
i think i found out the problem. I had the coil in the front forks tight. Ive had it this way for yrs. The bike would rebound hard everytime even bounce with the strap on it. I turned the adjustment fully. So its soft and guess what. The bike stays on the ground. Ive tried it a few times on the street but going to the track tommorrow. I never thought about cking that.
I had a similar problem with the front bouncing when it was strapped down all the way. It's because the only suspension you have left is the tire. I dropped the clamps down the fork legs a little and strapped it to the same height as before, this left a bit of suspension movement and most importantly, some damping. Problem solved.
The other comments about rolling the throttle open are spot on, you won't get WOT in first gear on a short wheelbase, unless you have a sick motor. Having more power than you can use is better than not enough. Like the others I found 17/40 was the best for stock wheelbase.
____________
Candy Thunder Blue 2006 ZZR1400
Stock wheelbase
Max: 205.4 mph in 1.25 miles
2012 ZZR1400 in Golden Blazed Green
Brock CT Full System. etc
Max: 203.1 in 1 mile (so far)
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Quarter Pounder
Pro
with Cheese
Posts: 1069
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posted July 08, 2011 04:34 AM
quote:
Tighten the compression on the shock up. Soft = wheelies hard = spinning. You want to find that happy medium.
l
soft does not = wheelies....hard will. If the bike cannot squat all that energy just wants to rotate around the axle (wheelie) The more weight you can get down in front of the pivot instead of over it...the better. If your shock is rebounding too fast with soft compression, it will spin when it unloads...sloooooow rebound is the key.
I will agree that if compression is too hard, it will spin much easier.
____________
SWB 2008 ZX-14
9.19 @ 151
5.98 @ 123
1.53 60'
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BobC
Pro
Posts: 1736
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posted July 08, 2011 05:13 AM
Some wise words above.
Also worth adding is that wheelying is provoked by the front end unloading which is why we strap it down.
____________
Candy Thunder Blue 2006 ZZR1400
Stock wheelbase
Max: 205.4 mph in 1.25 miles
2012 ZZR1400 in Golden Blazed Green
Brock CT Full System. etc
Max: 203.1 in 1 mile (so far)
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smokinZX14
Needs a life
Posts: 10197
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posted July 08, 2011 06:57 AM
quote:
quote:
i think i found out the problem. I had the coil in the front forks tight. Ive had it this way for yrs. The bike would rebound hard everytime even bounce with the strap on it. I turned the adjustment fully. So its soft and guess what. The bike stays on the ground. Ive tried it a few times on the street but going to the track tommorrow. I never thought about cking that.
I had a similar problem with the front bouncing when it was strapped down all the way. It's because the only suspension you have left is the tire. I dropped the clamps down the fork legs a little and strapped it to the same height as before, this left a bit of suspension movement and most importantly, some damping. Problem solved.
The other comments about rolling the throttle open are spot on, you won't get WOT in first gear on a short wheelbase, unless you have a sick motor. Having more power than you can use is better than not enough. Like the others I found 17/40 was the best for stock wheelbase.
Bob i was WOT in first gear at the 60 foot mark at stock wheelbase .. it's not easy but it's 100% doable..
____________
Smokin Performance Cycles..
Tampa Bay , FL .. Brocks Performance Dealer ..
Gen 2 ZX14R Best ET 8.43 , Best MPH 164.95
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Shane661
Needs a life
Posts: 11494
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posted July 08, 2011 07:23 AM
quote:
Bob i was WOT in first gear at the 60 foot mark at stock wheelbase .. it's not easy but it's 100% doable..
Lee, how much rpm were you bringing it out with??
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serius blk
Zone Head
Posts: 543
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posted July 08, 2011 08:30 AM
yea lee ive been trying what u told me. Its hard but if u can do i can or at least come close. im going to adjust the compression in the rear now to see if i can fine tune it.
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serius blk
Zone Head
Posts: 543
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posted July 08, 2011 08:34 AM
oh yea shane. lee told me he was leaving at 3500 rpm
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Slowninja
Expert Class
Slow-ride
Posts: 189
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posted July 08, 2011 09:15 AM
Ok, TOO soft will make it wheelie. You bottom out the shock and theres no where else for it to go but up.
But what do i know.
____________
06 zx14
SWB
9.24 @ 148
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