Modifications - Performance Discuss aftermarket and DIY performance modifications

15/41 or 16/43

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Old 05-03-2019, 08:54 PM
  #31  
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Erik, That site is Great! I cheat! I have a Coerce sprocket guard on the front so it eases counter shaft changes and the 2 extra rear sprocket carriers make it simple to swap rears. Sitting in the Mojave desert at El Mirage Dry Lake waiting for your turn to run through the traps gives one ample time to switch things out. I'm getting to old for track days but I can go really fast (for a stock motored 20 year old bike) in a straight line. It doesn't rely so much on reaction time or coordination. But, it's still thrilling and the comradery is great. I got inspired years ago when I watched "The Last Indian". I've learned things like; removing your mirrors is good for a little over 1mph, lighter viscosity oil is good for about 1/2 mph, a smaller non-O ring chain helps as well. My biggest non bike benefit was wearing really tight road race leathers, proper body position and holding my chin bar firm against the tank. I even gained a bit by running a more aerodynamic front fender. Next year...160?
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Old 05-04-2019, 01:24 AM
  #32  
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Originally Posted by smokinjoe73
It just seems you may overshoot the mark. Ive spent a lot of time changing gearing on the racetrack and even a 1 tooth change was noticeable. I know the street isn't as precise but 4 teeth is a lot.

Erik you cant drag math or science or good sense into this. hehe
Im not on a racetrack dude. Im just going for what feels nice riding around on the street. unless its a pig off the line im thinking i'll go as tall as possible. If i wanted to be the fastest kid on the street i'd get a four-banger.
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Old 05-10-2019, 07:45 AM
  #33  
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Originally Posted by Blackbetty
Here's a question, will changing the sprockets effect the speedo reading
Yes
Easily corrected with a speedo corrector
https://www.healtech-electronics.com/products/sh/
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Old 05-24-2019, 03:41 PM
  #34  
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Originally Posted by CaryDG
I've experimented with multiple ratios for two reasons. One being the best compromise of acceleration vs economy, the other top speed runs at El Mirage Dry Lake (SCTA timed) My Hawk couldn't pull redline with 17/43 gearing. Stock gearing would just hit redline in 6th and ran 150.786mph My best run was with 16/43 gears. I clocked out at 158.231mph well into the red zone! Probably could have done better with some jet tweaking due to the altitude. Listed Highest to lowest; Sprocket sizes/gear ratio; 17/43=2.529:1, 16/41(Stk)=2.562:1, 16/43=2.6875:1, 15/41=2.733:1 I run 16/43 Calibrated and corrected rpm-speed 5000rpm=81mph
I'd like to hear more about the land speed racing you've done with the V, have you posted on here about it before?

Thx
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