1/4 Mile help needed

damn that was an awesome launch! what was your 60'???
or wait if it was land speed and not 1/4 mile they didnt record that did they?

 

The biggest thing you should learn before going to the strip is how to launch the bike. Not perfectly but get the feel for it. Find a back road to practice. Stage the bike, bring the rpms up to about 5k and release the clutch quickly (don't pop it) just let it slip out quickly all while turning the throttle open.

Once you start to get the feel for it then you can raise the rpms for a better launch. You want the bike moving before full clutch. Rolling (not wacking open) the throttle on when releasing will help slip the clutch a tad and you'll come out more towards or in the power band for a strong launch. You won't pop a wheelie that way either with your bike. Not enough power that low.

That's the hardest part of drag racing is getting off the line correctly. The rest is just banging gears. You have more than enough room at the end to stop. Oh yea get your head on right and just run your race. Never think about the guy next to you on the line.

 

Kind of like adding negative numbers or building an outhouse?

 

$14 I think

 

Each hard launch= a few hundred miles clutch wear during normal street riding.

 

Kinda makes me wonder with the right gearing, tires and rider what one of the current factory MotoGP bikes would do in a quarter mile.

 

if you could stretch and slam it enough, really fucking fast lol.

 

I just passed 50,000 miles, with hundreds of passes on the factory clutch. I'd say the last ten or 20 passes were high tens as well. Clutch is still hanging in there :witless:

 

Thx, I guess not too bad for a noob :biggrin: ... yea, LSR is only focused on top end at distance, not times. So I have no idea about 60', or 1/4 mi, etc. After looking back at the video, I wonder if I could of reached a slightly higher speed at the mile mark had I launched from a higher initial RPM? ... I base this on watching my RPM drop just after launch, seems it went a bit low before climbing again. I probably won't try again with my VFR ... but I have an older VF700 that I could get running again, then take the motor out & put in something like a CRF250 dirt bike frame, add some kind of fairing ... and oh crap, what the hell am I thinking :roll: ...

ACE

 

what i saw was that you launched at about 9000 (awesome) and held it for a second or so but let it fully lock up maybe a second too soon as it dropped down to about 7000 rpms (still pretty good though). where you really need improving is catching that 2nd gear shift right before redline. you were on the limiter for a while. but all in all that was a really good , clean run! if you keep at it, youre going to running with the best of them in no time. if you want to get that vfr really moving, start dropping all the extra weight off the bike, and get some fork straps and launch really hard. heavier clutch springs and a sprocket really help too.

 

1st off I have been drag racing bikes and cars every year for the last 17 years . a stock bike or even a semi stock bike you will be fine don't worry about it . When you start thinking to much about things that's when thing go bad . also 1 guy on here said work on staging the bike he's right . So when stage there are 2 things you want to make sure you do . 1 stage in the tire grooves where car tire sit . That's where your going to get the best traction . Then you will prestage then stage . 2 when you stage in the last beam do not move your front tire left or right it will trip the beam and show you red lighted . Keep it straight and still .
There was also a guy on here telling you to take it up to 5,000 rpms and slip the clutch . no no no . If you like your stock clutch then that's not good . on a stock bike you want to start pulling back the throttle at the same time you start to slip the clutch out . only time you want to hold it at 5k or 6k rpm is if your running a mod motor do to a bigger cams . see bigger cams will not start making power till higher rpms . on my drag bike I will hold it about 4500rpm with a 2 step . Point is have fun be safe its not a race bike don't race it like one

 

The quest for low 60 foot times very quickly destroyed my stock clutch but it had plenty of miles on it, probably 17k or so at the time. I think that was about ten runs give or take so I have to agree to some degree with your statements.

But and there is always a but right, nobody tries their hand on the strip to see how slow they can go so you can bet that peer pressure and adrenaline will have you pushing your street bike like it's a full on drag bike before long, it's human nature to do so. That's right, you will be beating on her like a red headed step child by the third run! LOL :hss: So either do some preparation to you bike so it can take some hammering or don't do it at all. You will have more fun and get better results with some prep work.

Just my 2 cents.

 

For what it's worth, I have 53,000 miles on my 2007 vfr800 and have put an average of about 10 passes every three months or so on her for the past 4 years. I am still running the factory clutch.

My best 60' so far is 1.73 seconds. And my best ET is 10.82 seconds. My fastest trap speed so far is 127.8.

A few more mods and a little more seat time and I should break 130 mph and get close to 10.5s


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Also FYI this is with factory plates with heavy springs, launching at about 8000 RPMs.


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we just went to the track in Hagerstown with a high altitude of around 1000 ft. We ran pretty well. My best time was 11.233. 60ft: 1.855, 330: 4.794, 600:7.233, 1000: 9.38 and 1/4: 11.233 at 119.23mph.

 

Those are pretty respectable times even if it was at sea level. What year and mods do you have?


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My 5th Gen has the
Power Commander III,
Pipewerx can and
K&N filter.
The bike is using only a generic map.
It needs to get a custom tune. I guess I could have done a bit better launch. The bike will do the 11 flat if I just get a great launch. I think at a lower level I would see high 10's. what do you think?

 

Does it make a big difference in the altitude at 1000 ft compared to 100 Ft?

 

You might be able to get a 10.9 with more weight reduction mods, heavier clutch springs and FORK STRAPS.

is yours a 98 or 99?


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Go on a density altitude calculator and check it out. Wallace racing dot com or something like that.


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