Regearing

N

Nick Kickass

Registered
I am thinking of possibly regearing - down 2 on the front up 3 on the rear. Figure that should give me nearly 20% more effective tourqe to the wheel.

Is this practical considering I am probably making 130whp? Will this radical of gearing help or hurt ET and/or trap speeds?
 
That's insane gearing, IMO... On my stock-motor busa, 17/43 puts me at almost redline in 4th gear when I finish the 1/4 mile...
 
With a stock wheelbase busa, your bike will be unrideable. If you hit the throttle, it will literally flip over. You need to drop one in the front and learn to ride.
 
16/41 thats my key...
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If you have a busa... then 16/42 should be a good gearing ratio to increase torque!!
 
I'm still trying to figure out how you only have 130RWHP on a Busa?
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Its running at 5000-8000 feet altitude. Drag strip @4500 ft, it trapped 127, ran 11.3. Other people get similar times and speeds, though 11.3 could be improved upon, some old guy a while back who was really good could only get 10.6 or so.

It won't power wheelie thats for sure. I want to have some real acceleration rather than a really heavy 600.

So with this in mind, 2 teeth down on the front is still a bad idea?

Edit: Drop one in the front and learn to ride? I love these responses. Yes, I do know how to ride and no, this is not my first bike, nor my first season of riding.



<!--EDIT|Nick Kickass
Reason for Edit: None given...|1125069927 -->
 
Hmmmm... Are we talking breaking or binding or a much shorter chain life? Of course if there is a risk of the chain breaking or binding I won't do it.
 
16/46 wow  i wanna  see results or pics of it when in flips over



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Reason for Edit: None given...|1125716809 -->
 
What was your 60' time on your best run? If you weigh less than 270lbs, 16/46 is still too much gear. When I said learn to ride, I should have typed the word "It" and the end. I run 16/43 with a 6" over arm, and top out about 175mph. With the gearing you are getting, your bike will be damn near unrideable. If you are at stock wheelbase, be VERY careful the first time you launch it, it's gonna come up faster than you can react to it.......
 
OK, results...

Not as dramatic as I had hoped. It is about as wheelie prone as it was stock at sea level, and accelerates nearly as hard, it seems. It will come up in 1st if I get on it abrutly above 5K or so.

But it is less responsive, and it goes through gears too fast for my liking. It may be my imagination, or that I haven't really wound it out through alot of gears, but it seems to loose its gearing acceleration "advantage" as it goes to higher speeds.

Obviously, speedo is way off which is kinda irritating but it will be awhile before I can fix that.
 
How hard are you launching it? I can't believe you're hitting it hard, on a stock arm bike and not flipping it....
 
How hard am I launching it? I'm not reving it up and dropping the clutch, from a standstill I will let the clutch out, getting on the gas briskly. Or usually I will get to 40mph (figured real speed) and WFO it. Obviously I could loop it if I just revved it up to 9K and dumped the clutch, but thats normal.

I don't see it looping unless I do something really stupid or try to loop it. It is not a "handful" to ride. It hasn't wheelied in 2nd yet, with some pretty abrupt opening of the gas from the sweet spot.

Oh, I am not doing this for wheelies I just want the acceleration that comes with it. Just for the record...



<!--EDIT|Nick Kickass
Reason for Edit: None given...|1125719693 -->
 
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