7 sec motor bike

[BATTMAN]

What would be the best combo to go 7's with all motor...no turbo and no nitrous?  List what bike you would use, chassis, suspension, swingarm length, motor combo, and clutch setup.  Go into detail.  Lets just assume that money is not an issue for this build.

[BATTMAN]

I guess no one wants to tell their secrets

[Mr Brown]

You left too many variables. Does it need to fit in a class? How much does rider weigh? With no rules to adhere to you can get 7's on a good head/cam package, slick, slider and very light weight. 500lb package with 210 hp will get you in the 7's

[BATTMAN]

no class, average rider weight (185lbs)  This is just a topic to start conversation.  Fill in the variables as you wish.  If you were building a seven sec all motor bike and you had a generous budget, what would your plan be?

210 hp can get you in the sevens?  give me more details.

[Mr Brown]

If I was building a bike it wouldn't be all motor, but that's a different story.....
210 hp will give you enough mph to get a 500lb package runnin 7.70-7.80  ish. Assuming a slick and slider bike with a decent rider for a good short time, you should have no issues reaching the goal. Keep in mind that with a 185lb rider that bike could only weigh 315 ready to run. That's possible but would take some work. 210 hp is achievable with a head, cams and a good pipe on any Busa, 14 or 1k.

[Chris Horoho]

the grudgebikes all motor packages are running 7.50's -7.40's
thats all motor 1k's and all motor busa's



my thought on a massive all motor would be a 1925 (with custom mod'd cases and custom billet head) and 75" with slider and such

[Mr Brown]

my thought on a massive all motor would be a 1925 (with custom mod'd cases and custom billet head) and 75" with slider and such

Why would you need all that to go 7's?
It would be a cool "because I can" type thing to do, but would be overkill for the numbers Battman is looking for.

[Chris Horoho]

Why would you need all that to go 7's?
It would be a cool "because I can" type thing to do, but would be overkill for the numbers Battman is looking for.

well actually low 7's is that combo and i know why what he is asking lol

[BATTMAN]

210hp will go 7's?  Im assumng thats with a grudge bike chassis and a slider and slick.  Im a decent rider, but I think Im gonna need more hp than that.  My turbo bike is fully dressed and I could only manage low 8's.

[Mr Brown]

Yes, 210 hp will go 7's. Yes it would be a grudge setup.
Tell me what your bike/rider weight is and I will tell you the kinda power you need. It takes around 5-600 hp to get the prostreet bikes in the low 7's, you will be hard pressed to get an all motor bike to make that kinda power. Hence the reason all motor grudge bikes are very light. Gotta be to run the numbers they do.
MPH in a drag race is simple math. It takes X amount of power to move X amount of weight at X speed. Now your ET will vary according to how well you can ride, but MPH tells the truth.

[BATTMAN]

I have cut alot of weight off of the bike.  I dont know the exact weight. I will weigh it when the track opens.  Its sitting at 65". I may make it longer. I cut everything that is not needed off the frame and subframe, light wheels, all the fatory weights off the pegs, fiberglass tank, 180 rear tire, skinny front tire.  Its no where near grudge bike weight but Im sure its alot lighter than most track bikes.  There's nothing on it that is not needed.

[Chris Horoho]

needs cut rails and all the extras added that go on a grudge to get it down in weight
id go chromoly arm and more at 68+" to get it long low and light

[BATTMAN]

Im waiting for you to cut the rails and make me a arm.  I just assumed that I would get more races with a shorter arm.  Thats actually a stock busa arm with the box cut and welded in extentions.  Its amazing what a good powdercoat can do.  It was supposed to be a budget build made from all the extra parts in my garage.

[Chris Horoho]

Im waiting for you to cut the rails and make me a arm.  I just assumed that I would get more races with a shorter arm.  Thats actually a stock busa arm with the box cut and welded in extentions.  Its amazing what a good powdercoat can do.  It was supposed to be a budget build made from all the extra parts in my garage.

gotta bring it here for me to do that

[Mr Brown]

Good lookin piece! 
Once you get it weighed and have an approximate weight for the rider, I will be able to give you hp requirements for the number you wanna run.

[Mr Brown]

gotta bring it here for me to do that

Make the ice and snow go away and maybe people will bring you some bikes for you to fuck up I mean work on......

[Chris Horoho]

Make the ice and snow go away and maybe people will bring you some bikes for you to fuck up I mean work on......

you were right the first time
and poof its gone
heck they never got us higher then a level 1 cause i think chrysler is padding the county to keep it open lol
same with my work but not happening i had 2 counties in level 3 i drive through so not going to jail for them lol
there see its all gone lol

[BATTMAN]

what actually makes a grudge chassis?  I can get a lighter/longer arm. I can get a grudge tank and tail. i dont know anywhere else I can take weight off the bike.

[Chris Horoho]

some bikes swap to lectron carbs for weight savings
some remove EVERYTHING then put on just the needed items on bike
there are tricks here and there its just in what you put on bike to keep it happy
airbox even has weight to drop off

[Mr Brown]

what actually makes a grudge chassis?  I can get a lighter/longer arm. I can get a grudge tank and tail. i dont know anywhere else I can take weight off the bike.

There are lots of places to put the bike on a diet. Sand your bodywork down from the inside til you can damn near read thru it. Drill holes in absolutely everything you can. Take the headlight out and cut the back off. Take your gauges off and use just a shift light. Use a total loss electrical system.

[BATTMAN]

Im just gonna have fun with what I have.