Rilo

Looking at extending my stock swingarm for drag racing.I work at a metal fab shop so i will have it done there. I did not no how many inches i should have added. Also do i need to lower bike after extending swingarm? If any of you drag racers out there could give me any ideas on swingarm or anything else to get me started in setting up my bird it would be great. Thanks

GhostRider

In general, set up can be everything. Strap that front end down and you may or may not want to lose the shock and trade it for a strut. The biggest problem you face is weight, which has little to do with a flat out top speed run and everything to do with an acceleration run like that 1,320 feet you're trying to cover. You will also want to change the gearing as you want to be in 6th at peak horsepower rpm just before you hit the traps and that won't happen at 17/45. At 15/48 you would be geared for 152.1 mph and each gear will give you roughly 20mph starting at 57.2 in first at 10,800 rpm. You'll have to play with launch rpm and you'll need some good rubber on the back for sure because that rpm is likely to be around 5,000. Michelin is finally making a solid strip tire.

Good luck..

Rilo

Hey thanks for the info.

Partsguy

Mine is set right now at 8" and it's too much,but over gearing will only result in wheelspin.There is a common ground to be found between the two.I ran the same gearing as last year and struggled to get traction with a shinko ultra soft tire this year,I had no problems the last 2 years with my Metzeler dragtech and I'm sure the difference was not the tire.It will also depend on how much power you have and how fast you get through the gears.16/46 worked well for me for years,add an air shifter and 15 hp and its not right anymore.I have 150 at the wheel and that gearing used to leave me flat out in 5th at 138-140 mph.I now hit 6th too late but can't stay in 5th.Tried 15/46 and spun all the time,had to back the launch rpm down to 7000 from 8000.Going to try 15/45 then 15/44.

BackStreet

HAYABUSA

Partsguy

DO NOT GIVE IN TO THE DARK SIDE!!!! BE A LEADER,NOT A FRIGGIN' FOLLOWER.

And besides,I'm beating a lot of those guys now.

shewie

I believe you. They are not invincible on the road, either, particularly where there are twisties.

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B210

its great that suzuki came up with a name that any 2 year old can say lol

Partsguy

15/45 seems to be the ticket.

9.70
Can't complain.

2000bluebird

and you are on this forum why?

just kidding.

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TheDuck

Come on you know you want one

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shewie

Damn skippy! I'm still waiting for you to produce a kit for this.

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TESLACOIL

extreme gearing....

In principle if u geared 6th to top out at 150mph redline this would give the best results

1st and second will be hard to handle...but good throttle skill comes in here

3rd onwards you should be able to prevent wheelies and weelspin


HAS any one tried it ? 50 to 60 tooth rear sprocket ????

BigDave

I have a 15 /44 set up that i am going to install. I was warned that a 15 tooth sprocket might very well align the chain so low that it tears the crap out of the plastic guide on top of the swing arm. Do we need to replace that strip constantly with delrin strips? How long would a delrin strip last? Not long.... I cant think of a way to route the chain higher. I was told to switch to a 520 chain for drag racing too.
I am pretty upset about my 15/44 and chain i bought as a package. it sounds like i cant even run it on the street, only for the quarter mile as wear will be too great. i am pissed..Any solutions to this??

Partsguy

I'll have to look at my swingarm,haven't heard or noticed anything yet.I don't have a stock swingarm on anymore,this could be a factor.

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BigDave

who's swing arm do you have?

TESLACOIL

it will handle like pooh round corners with an extended swing arm....i lowered my rear end by 4 inches and just doing that made the handling suck

just in case anyone wasn't aware

BigDave

parts guy, can you click off consistent 9 second quarter miles mow that you are re geared with only 150hp? I believe you. My mate thinks you are lying. But he can be Mr negative sometimes. Extended swing arm?

I hope to do nines with my set up but not sure if i can with only 140hp and my 15/44 set up. I just have to stake my chain tomorrow and i will be done. I do have a SS set of down tubes to install still/. I may have picked up 3-5 hp with new plugs, dyna coils and dyna wires. Who knows. I wont be able to tell since i am re gearing at the same time.

So, if i have 143hp and my gearing is nines possible? I dont want to ditch my center stand just yet. I am loving it to death using it to work on the bike. Maybe if i get a lift of some sort....

The rubber swing arm guard is in good shape after 30k miles. I think it is tough as nails and it can be replaced in 2 minutes if it wears out. I dont think a 15 tooth sprocket is going to kill me. Any touring and i will switch to 17/44....

This is my first bike that demands a staked chain and NOT to use a circlip. Honda is pretty adamant about that. Why? I have never heard of a circlip coming off.

I have to buy a cahin breaker and riveter tomorrow. i had to use ,my dremel to saw my old chain off this evening. WHat a pain....

outlawgibbs

Im running 10.20 with only running a 16 front and 140hp and swb. Lowered 3in in back and strapped the front. And I have the tickets to prove it.

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BigDave

I dont doubt that at all.
Do you think you can run into the nines with a 15/44 15/45?

Yesterday i saw a basically bone stock bird click off consistant 10.40's and less. Good rider helps.

what is strapped? Just lowered or somenting different?
how did you lower it SO much in the back?

outlawgibbs

I have a 1"/3" lowering link for the back. I also have an extra kickstand that I cut down for when I lower it 3". The down side is I had to take the center stand off since when I turn it scrapes the ground, but I put it back on when I raise it back up. I have a strap for the forks. It just a rachet strap that mounts to your caliper bolts and raps over the frame. I can convert the bike from stock to drag in less the 20 mins. I think your only problem getting into the nines is being at stock height but you also have the weight to keep the front end down, I dont. I was pulling 10.50 lowered an inch in the back with the 16 tooth front, my rear is still stock. I dynoed at 139.7 before I put new plugs and filter in it. 48K miles and only D+D slip-ons and 16 front for mods. A friend who drags a turbo Busa told me I could hit the nines with what Im running with some more practice, I have to wait till spring to get back on the track to find out.

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BigDave

sounds great. where do i get the lowering link and the strap???


never mind. i found the Schnitz straps and bouthg them. and soupy's infintite adjustable link up to minus 4 inches. I can use it for the stcok height ride TOO!!!!
SOUPY'S MOTORCYCLE LOWERING KITS, HONDA LOWERING, KAWASAKI LOWERING, YAMAHA LOWERING, SUZUKI LOWERING, TRIUMPH LOWERING, SPEED TRIPLE LOWERING, STREET TRIPLE LOWERING, GSXR LOWERING LINK, GSXR LOWERING KIT, RAISING LINKS, RISER LINK, KAWASAKI ZX14 LO

he has BITCHIN adjustable kickstands for every bike BUT the Blackbird..of course. there we go with the red headed step child syndrome again. wE ARE the bastard children of the aftermarket arent we? I want to violenty strnalge someone sometimes when i see stupid crap like this. Make a lowering link but NO adjustable kickstand. They must think we are retarded or something. I know we are not a big population, but if you are going to the trouble of making a lowering link then give us a kickstand like all the other bikes. I gave the guy an earful to make me feel better.

I may end up chopping off my stock kickstand and GRAFTING an adjustable one from a CBR 1000 to the stump. Just like my right leg!

TESLACOIL

whats the fastest you've run so far Dave ? On the bird or other bikes.


any busa zx lamer can break into the 10s ....the 9s is the Big league rider skillwise for most street bikes

The bird is a bit of a challenge to get into the 9's be great too see you do it


----------------------------------------------------------------------
Ill prolly take a run up the strip myself this year 10 anything will be good for my fairly stock bird i reckon

Partsguy

Dave,I was running consistent 9.9's with 150hp,stock wheelbase AND an air shifter,my 60ft were 1.66-1.70 range.
There are many variables,the main being practice,practice,practice.The 'Bird lacks the torque of the Uglybus and ZX's,so gettin a quick first 330 ft is more difficult.
I thought mine was set at 8"-turned out to be 11",it's now about 9" over.
I'm still not perfectly happy with the gearing as tagging the rev limiter in 5th will sometimes give me my best time.IIRC correctly my 9.67 was in 5th.
You cannot just go radically short gearing,you will spin the back tire or have to back off on your launch both causing the same effect-slower times.And you'll wheelie-again= slower times.
Dave I think 2 main things are against you running 9's.Your size,add 2/10 or more as you go past 200 lbs.And 140hp is not enough to haul that bike to the nines,you would have to be Ryan Schnitz(damn good pro racer,120 lbs).Like I said it takes lots of practice to set the bike up and maximize its potential.
When the Uglybus first came out remember the mag times? 9.97 9.98 etc.Thats with 20 les lbs of bike,20 more lbs torque and 20 more hp.and experience riders.

The arm on the bike is a Macintosh arm.They make drag racing swingarms.Good ones.

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Taking life a 1/4 mile at a time.
Hey Graham,save me a turbo.
www.forestcityhonda.ca

outlawgibbs

Remember these damn magazines that post up times dont tell you the real stock time that they run. They calculate it for sea level,wind,air temp, ect...... To get the times that they post you have to be at a made up track at a made up location with no wind hitting you only the ram air tubes. And thats all with a pro rider who weights 100lbs.

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GrahamcUK

Project T
post 15 and 19
hope to have them up for sale shortly.
Cheers Graham

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PrimalDoubleXer

Partsguy

I'm fully aware of it,don't know about the masses.Busa's have definately run high 9"s stock.My friend ran a stock zx12 at 10.03,it may have had a slip-on.

Like I said before,there are a lot of variables.

__________________
Taking life a 1/4 mile at a time.
Hey Graham,save me a turbo.
www.forestcityhonda.ca

BigDave

not that fast. Only 9.4, but consistent 9.4's on the bike i learned to drag race on.. a GSX1100, a dedicated drag bike with wheelie bars and a slider clutch and a 7 inch slick. It was TONS of fun to run. Pretty easy. point and shoot, and hang on. It had a delay box and 2 stages of nitrous but i never got that far. The guy that built it is one of the nations top fabricators now. He move to the Carolinas.

TESLACOIL

I got 129hp at the back wheel maybe a touch more with ram air type effects at speed

id like to just roll up at the strip and break into the 10s...ill prolly need a few runs to build up to it (dont want to shag the clutch through sloppy technique)

prolly wait till April may & take a trip to Santa Pod

9 anything is not to be sniffed at ....takes balls and skill no matter what machine u do it on ....not many guys ever run below 9.5 ...unless you are a draghead