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R3 115 mph?

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#101 ·
R3 with 3,000miles
Stock morning topped 106mph
Same day afternoon 117mph

With fender eliminator and slip on
Morning 111mph
Afternoon just tipped 120mph
 
#103 ·
I thought something was wrong as well, but I did this multiple times. Not very windy where I'm at either. I always thought the cooler air would give the engine more power, but I guess on the lower powered engine it doesn't make enough difference. My guess is that in the cooler air in the morning it is also denser creating more wind resistance, while in the afternoon when it's warmer the bike seem to slice through the air easier.
 
#104 ·
Dman250r said:
I thought something was wrong as well, but I did this multiple times. Not very windy where I'm at either. I always thought the cooler air would give the engine more power, but I guess on the lower powered engine it doesn't make enough difference. My guess is that in the cooler air in the morning it is also denser creating more wind resistance, while in the afternoon when it's warmer the bike seem to slice through the air easier.
Click to expand...
Were all runs made in the same direction?

If not, and they are out and back runs, is one way uphill slightly, with the other way downhill slightly?
 
#105 ·
It is a very long flat stretch, one of the days I did do a couple passes back and forth and nothing changed. If it's not the dense air creating more drag I guess only things left would be tire pressure expanding from the heat and increasing the circumference of the tire. Or maybe it's something to do with the fuel map.
 
#106 · (Edited)
Dman250r said:
It is a very long flat stretch, one of the days I did do a couple passes back and forth and nothing changed. If it's not the dense air creating more drag I guess only things left would be tire pressure expanding from the heat and increasing the circumference of the tire. Or maybe it's something to do with the fuel map.
Click to expand...

Or, it's some local Speed Gremlins being mischievous..........
 
#107 ·
Dman250r said:
It is a very long flat stretch, one of the days I did do a couple passes back and forth and nothing changed. If it's not the dense air creating more drag I guess only things left would be tire pressure expanding from the heat and increasing the circumference of the tire. Or maybe it's something to do with the fuel map.
Click to expand...
If heat increased the circumference of the tire that would only make him go faster on GPS, his motorcycle speedometer would be the same. He didn't say whether his readings were GPS or motorcycle derived.
 
#109 ·
I got 184-186kph every lap on the weekend, and we have a very short straight.


Still not on revlimiter so should be able to indicate 190-200 easy on the road.
USA models might be restricted if they only do 115mph.
 
#110 ·
Too many factors

Dman250r said:
R3 with 3,000miles
Stock morning topped 106mph
Same day afternoon 117mph

With fender eliminator and slip on
Morning 111mph
Afternoon just tipped 120mph
Click to expand...
With a small engine, the weight of the rider, terrain, quality of the tuck and wind direction can cause a 5-10 mph difference. However, 194 (120 mph) seems to be the top speed for the average weight rider, 175 lbs.

For some reason, the rev limiter is lower on the R3 than the R25, because it revs to 13000 RPM before the limiter shuts it down. Also the power drops off significantly after 11,000 rpm, so continuing to rev it through the gears gets you nothing.
 
#111 · (Edited)
Audiolad said:
With a small engine, the weight of the rider, terrain, quality of the tuck and wind direction can cause a 5-10 mph difference. However, 194 (120 mph) seems to be the top speed for the average weight rider, 175 lbs.

For some reason, the rev limiter is lower on the R3 than the R25, because it revs to 13000 RPM before the limiter shuts it down. Also the power drops off significantly after 11,000 rpm, so continuing to rev it through the gears gets you nothing.
Click to expand...
I believe the R3s rev limiter is lower than the R25s because the R3s larger pistons weigh more. That equates to more stress on them, and on the connecting rods, at any given piston speed and could cause the connecting rods to fail at the R25s higher top RPMs.

The Yamaha engineers probably calculated the stress forces on the R3s pistons and determined what the rev limit should be. Bet they also failure tested some engines at various RPMs to be certain, then erred on the side of caution and set the limiter some safe % lower than that at which failure occurred.
 
#116 ·
Being stationed in Germany, I can cruise at 190 kph and have seen 195 on my speedo. Sorry I don't have pictures. But I've cruised at 185-190 kph for over half an hour on my way to Munich. Amazing engine
 
#117 ·
I just got my r3 last week and i'm still in the break in process so i'm really interested in the top speed of this.

I used to have a ninja 300 before i crashed it and i was able to get my ninja to 120 mph full tucked slightly going downhill. I weigh 170 and had yoshimura slip-on before i lost my ninja.

Hopefully the r3 can go 115-120 mph because of the bigger displacement
 
#118 ·
The Ninja 300 won't go 120. It's about 108 I believe. Maybe 110. If you're going by the bike's speedometer it's not right. GPS is the only thing that matters here.
 
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