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-   -   How to launch off the line (https://www.sportbikes.net/forums/drag-racing-101/397782-how-launch-off-line.html)

Blue Angel 07-24-2008 09:36 PM

How to launch off the line
 
I'm a big drag race fan and have had several hot rods. Some ran in the 11's others in the 13's. I've been riding bikes for a while but have always wanted to drag one. I've got a '07 Busa with a Power commander, ATRE, Air Filter, Air Box mod, Custom shorties, -1 in the front sprocket and it's been custom mapped. It's a very strong bike and is killer at every gear. But I'm just not sure how to launch it! Any advice?:dunno

bluegsxr02 07-25-2008 10:49 AM

i usually have the bike rev'd up to about 8k and then when time to go i start to slip the clutch out.

Blue Angel 07-25-2008 12:00 PM

about what distance would you say the clutch is fully engaged? 60 ft?

bluegsxr02 07-25-2008 02:14 PM

umm yea i would say around that area...is ur bike lowered at all?

Blue Angel 07-25-2008 09:21 PM

No. The suspension is all stock. I really hate to alter it too much, because I also love the twisties. I think I'll do prett good once I figure out how to launch without making a butt out of myself.

bluegsxr02 07-26-2008 12:52 PM

yea the only thing ur really got to worry about is keeping that wheel down..cause if u let out the clutch to fast its goin to come up

BLK 07-08-2009 11:28 PM

I will probably be running my bike in a few weeks too. Have tons of drag racing experience in cars but none on bikes. I dont really want to slip the clutch. Is that bad on the clutch? I know you wont have as good of a time if you just limp it out like you would on the street driving normal but getting on it hard after the clutch it out. But what do you think of this technique?

TheMaximaGirl 07-16-2009 10:38 AM

I know they are difficult to launch. I race with a few Busa's and they struggle here and there. I ride a 600 and pull 1.68-1.7 60 foots with a strap. I launch at 10-12K depending on the track. I've never heard of liter bikes launching at that rpm. One of the main guys I race with has a ZX10 he lanuches at 5 or 6 and he does REALLY well. Clean launch, good 60 foot and great e/t.

Good luck getting the Busa down.

BLK 08-17-2009 10:59 PM

Wow I wish I could launch that high. No way in hell my local track would hold that. I slip it from 8k or so and manage 2.0-2.1 60s.

mangosmoothie16 07-15-2013 02:50 PM

Bringing this back from the dead... Hopefully someone sees this.

I did 2 attempts at launching. It was shamefully squidfully on the street. There isn't a track very close. I know better but oh well... I need to learn to launch so I can go up against my friends Mustang Mach 1 when I actually go to the track. His best was a 12.9 so I anticipate losing but I want to be as close as possible.

Attempt 1
https://www.youtube.com/watch?v=cdJn...ature=youtu.be

Attempt 2, skip to like 0:35
https://www.youtube.com/watch?v=Ee4h9xWJCbw

My 0-60 is in the mid-high 4 range. I thought these Ninja 500's were like 3.9-4.2 I'm 130 lbs in gear so it's not weight. Elevation is about 700-800 feet and it was 90 degrees. I don't know how to launch it any better. Now, I am trying to shift at or before 10k (because I heard cranks on the 500 like to snap if you rev it higher) so that could also be the reason its slower. Anyone have any tips for me please?

mpusch 07-15-2013 03:26 PM

Quote:

Originally Posted by mangosmoothie16 (Post 5101553)
Bringing this back from the dead... Hopefully someone sees this.

I did 2 attempts at launching. It was shamefully squidfully on the street. There isn't a track very close. I know better but oh well... I need to learn to launch so I can go up against my friends Mustang Mach1. His best was a 12.09 so I anticipate losing but I want to be as close as possible.

Attempt 1
https://www.youtube.com/watch?v=cdJn...ature=youtu.be

Attempt 2, skip to like 0:35
https://www.youtube.com/watch?v=Ee4h9xWJCbw

My 0-60 is in the mid-high 4 range. I thought these Ninja 500's were like 3.9-4.2 I'm 130 lbs in gear so it's not weight. Elevation is about 700-800 feet and it was 90 degrees. I don't know how to launch it any better. Now, I am trying to shift at or before 10k (because I heard cranks on the 500 like to snap if you rev it higher) so that could also be the reason its slower. Anyone have any tips for me please?

Holy thread revival :D

I think you've seen my thread on EX500, but I don't know what those times equate to for 0-60 times. My best was around 2 flat 60 ft.

My personal technique for launching might be different than others. For the 500, I don't hold the rpms at 7-8k before the light. Instead, I keep revs pretty low, then crank the throttle (near full throttle)) right before I start slipping the clutch. This way, I ensure I'm full throttle as quickly as possible, which is ok on a relatively low power bike like the 500. End result is after the first couple feet I'm skipping the front tire through most of first gear when I do it right.

Also, if you haven't learned yet, practice clutchless upshifting.

Yes you'll lose if the stang is putting down a 12. I was up in the 13.7 range when I went, though with some practice (and the fact that you're a bit lighter than me) I'd bet you could be around 13.5.

Edit: just watched your videos. Seemed like you had a pretty decent launch, though you let the revs drop kinda low to almost 5k in the first vid.

mangosmoothie16 07-15-2013 03:44 PM

Quote:

Originally Posted by mpusch (Post 5101577)
Holy thread revival :D

I think you've seen my thread on EX500, but I don't know what those times equate to for 0-60 times. My best was around 2 flat 60 ft.

My personal technique for launching might be different than others. For the 500, I don't hold the rpms at 7-8k before the light. Instead, I keep revs pretty low, then crank the throttle (near full throttle)) right before I start slipping the clutch. This way, I ensure I'm full throttle as quickly as possible, which is ok on a relatively low power bike like the 500. End result is after the first couple feet I'm skipping the front tire through most of first gear when I do it right.

Also, if you haven't learned yet, practice clutchless upshifting.

I tend to search forums first lol. Found this so I revived it haha. Thanks for the advice. I have seen your thread haha. I was clutchless shifting in that vid. I asked on EX500 and FOG said it takes practice, I was doing fine, and to take it a little over 10 grand. I've used your technique before too. Obviously a stop watch isn't the most accurate. I'd need to go to the track and launch a few times and compare 60 ft times.

mpusch 07-15-2013 04:05 PM

Quote:

Originally Posted by mangosmoothie16 (Post 5101609)
I tend to search forums first lol. Found this so I revived it haha. Thanks for the advice. I have seen your thread haha. I was clutchless shifting in that vid. I asked on EX500 and FOG said it takes practice, I was doing fine, and to take it a little over 10 grand. I've used your technique before too. Obviously a stop watch isn't the most accurate. I'd need to go to the track and launch a few times and compare 60 ft times.

I added a few edits to my prior post. Seems like you have a pretty good feel for launching and just can refine it a bit. Remember that those 0-60 times are done by very talented riders in ideal conditions. I think I put down pretty good times on my Daytona (7.69 in the 1/8th) until I see that other guys are getting close to 7 flat. It's pretty humbling.

I'd definitely recommend finding a track if you can, it'll make it a much more enjoyable experience. I'm lucky enough to have an 1/8th mile track right near me and a 1/4 mile track an hour away. It's worth a moderate trip IMO.

mangosmoothie16 07-15-2013 06:31 PM

The first launch I just dumped the clutch as soon as I was moving. The second launch I tried to slip the clutch. FOG said to overrev in 1st since there is little load on the engine. So that will help. Like you said, I have a general feel of how it should go. I did a few more like the second video. Just need to practice more.
And I meant to say the mach 1 did a 12.9 best run. Not a 12.09 lol.

Tony216 07-16-2013 05:56 AM

My suggestion would be to NEVER race a car and to avoid any drag strip that would let you.

I understand why people like to rev the shit out of stuff to get good launches, but I find I'm MUCH more consistent and faster with lower rpm, like mentioned above about the ZX10.

When I launch my Buell, I hold it at 3,000rpm (nearly 50% of redline) and try to get the clutch to engage as quick as possible. Normally I'd tell someone to lower their air pressure to get more tire on the ground. But I'm not sure that's necessary on a Ninja 500.


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