Yamaha Discussions about Yamaha ATVs.

I got to run 1/8 mile last night at KCIR dragstrip in KC,MO on the Raptor..results

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Old Jul 12, 2002 | 10:14 AM
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They allow ATVs on Thursday nights now. I made almost 20 passes. I got it down to 9.30 at 97.88MPH being the best pass. It stayed in the 9.30-9.38 range pretty good. This was with a wheelie bar. I could leave on the track on the rev limiter with the wheelie bar. The bike pulled a 1.91 60' time. I was pretty impressed with it. That's about what a 14.5 second car runs in the 1/8 mile. Not too bad for a stock bike with a pipe, jetting, and filter. My buddies modded Banshees were only getting 9.02, and 9.15 as there best times. They were pulling down 71, and 74 MPH though. The bike that pulled 74MPH had the clutch go out right after that run. It would have made it into the 8s for sure with a few more runs.
 
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Old Jul 12, 2002 | 10:33 AM
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what sprocket you running to get 98mph? I hope not the 12 tooth!

why are the banshees faster than you, yet only 74mph?
 
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Old Jul 12, 2002 | 10:36 AM
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Sorry.....typo. Doh!!! That's 67.88MPH for me. I wish it would go 97MPH. That's really cooking it in the 1/8 mile. My 10 second stang only ran 99MPH most of the time in the 1/8 mile. I'm running a 12 tooth.
 
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Old Jul 12, 2002 | 10:49 AM
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Was it wound out when you got to the finish? I never dragged before, even 1/8 mile seems long to me like you would be wound out..
 
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Old Jul 12, 2002 | 10:52 AM
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I was shifting into 5th about 50 feet before the finish line, so it had more left.
 
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Old Jul 12, 2002 | 11:27 AM
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Put a 14 tooth on and you'll see a jump in your speed and time that will blow your mind.[img]i/expressions/face-icon-small-cool.gif[/img]
 
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Old Jul 12, 2002 | 11:31 AM
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Okay.....? Help me understand this. I know that typically lower gearing helps move a car faster through the 1/4 mile. I have lots of experience with that. It would seem to me that lower gearing on the quad would also get it through the gears quicker, and therefor make it faster. But......this is the first time I've ever raced it on the strip. I would think that it would make the gears much longer, and harder to pull through them. How does it help? I'm willing to try it, but would like some reasoning here.
 
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Old Jul 12, 2002 | 11:46 AM
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Im no drag racer but it would seem better is maybe if you could start in second and end in 4th with a 14t or 15t? you would be doing away with 2 shifts?

Otherwise going down to an 11t and using all of 5th may be better?

I dunno..Im sure we'll find out shortly though. lots of draggers in here
 
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Old Jul 12, 2002 | 11:57 AM
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The idea is to be right at the power peak in high gear as you go through the traps. Given that, you should go to an 11 tooth countershaft sprocket and see if that helps. If it is a little much and your speed falls off. then go back to a 12 and go up a tooth or two on the axle. Keep playing with it until you have it at its best. You will know when you have too short a gear when your time has stabilized but your speed through the traps is falling off.
 
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Old Jul 12, 2002 | 07:57 PM
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Bad660r, next time you go let me know, I didn't know that they let quads run out there. Gonna have to hook up and go riding sometime with you and your friends. Going to deep water this sunday mater of fact. Load up and come along.
 
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