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Downhill and tucked in with a tailwind you can hit speeds that are not possible with no wind on a flat road. I think a true 90 is out of reach for even a very good running rebel
 
Just sayin' if he actually did it .. 90+ true (not indicated) MPH it sure as heck wasn't wasn't on a level road with no tailwind.. Not saying he didn't get the ticket cause I don't know.
 
I have had mine over 85mph indicated. My speedo should read pretty close to true because of a 1 size larger than stock front tire, although I have never got around to checking it on gps. It was done on a fairly flat stretch of the interstate.

Here is a copy of the ticket that Wrzesinski received.
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I have had mine over 85mph indicated. My speedo should read pretty close to true because of a 1 size larger than stock front tire, although I have never got around to checking it on gps. It was done on a fairly flat stretch of the interstate.

Here is a copy of the ticket that Wrzesinski received.
Image
Yes, my 450 can't do 80 uphill in winds! Lol! My ride to Vegas had stretches where 80 was relatively easy, then others that slowed her right down to around 65-70. I've mostly had larger bikes. I've only owned one other 450. A Suzuki GS450L. An ugly bike that I rode from NY to LA. Performance was much the same. I remember Palm Springs was a nightmare. So much head wind. Slowed me to 45-50 and tossed me from lane to lane. Good times. :)


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testing while going down hill "LOL"

I'd suggest to get good numbers for your test you should run the test in two directions like they do at Bonneville and average the 2 runs. This should help eliminate both wind and terrain effects.
putting a exaust fan on an air filter just does not put out enough air to support positive pressure volumn in the piston cyl. you need to look at v-8 power super charger RPM, you will see that exhaust fan will not put out enough air to make up enough air/fuel displacement to cause effective horsepower.
 
There's a thread here somewhere with pictures of a Rebel fitted with a serious supercharger. If I recall correctly, it didn't work well because it wasn't rejetted.
I've heard about it too. Looked for it but I couldn't find it. I would like to see it. The last time I took my car to Memphis Motorsports Part before I had to sell it. There was a bike there with a Paxton supercharger on it. Full drag bike but it still was supercharger.
 
This was a really pro job, with precision welding and very impressive engineering. I'm sure it cost serious time and money to do. I was very disappointed to hear that it had been dismantled. Especially when I read why.:frown:
 
This was a really pro job, with precision welding and very impressive engineering. I'm sure it cost serious time and money to do. I was very disappointed to hear that it had been dismantled. Especially when I read why.:frown:
Are you talking about the turbo charged Rebel? I've seen it but not a supercharged one.
 
There's a thread here somewhere with pictures of a Rebel fitted with a serious supercharger. If I recall correctly, it didn't work well because it wasn't rejetted.
The fan experiment did prove that serious supercharging (multiple PSI of boost) won't work without a pressurized carburetor as well. Remember how even the small fan pushed down the fuel column in the carburetor jet tube and killed the engine. There's more to it than just rejetting.

If one simply vents the carb to the pressurized air source as was done with the fan, the boosted pressure would bubble air back up into the fuel tank once there was significant boost on a gravity feed system.
 
That's the one I was looking for. Yes it was turbo'd. That's a good reason I couldn't find it.
 
Thanks flight. He never did post the video no matter how good or bad it ran.
 
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