got a 1995 900rr with 99 plastics.. micron pipe. i got to about 145 before i got scared....lmao

 

98 900rr all stock except full yosh exhaust and jets. 140 is the fastest I've gone, lost my nerve and slowed down at that point but I know it will do much more. All I kept thinking about is how it would feel hitting the pavement at that speed, which was more than enough to persaude me to cut the throttle. Call me a wuss, I admit I am afraid of it sometimes but I'm too young to die now, having too much fun

 

I've gone 180 with no problem on my 99 with 95 motor.. But the motor has alot of work done to it.. Yes it was a track bike I switch the frame to make it street legal.. The plastic I bought from a salvage yard in ct for a great price..

 

spedo said 185 wi**** went faster. am i the only one

 

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Negative. Sort of. The stock bike is not gear limited, it is redline limited. Chopping the gearing a bit will, possibly, bump the engine up into the powerband when it matters, say 150mph, rather than the engine lagging below its peak power if it had the stock gearing.

With 15/45, what rpm was 151mph?
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what do you mean "redline limited?"

yes, some under powered bikes(like my ducatis,) do run out of motor before before they run out of gear. but this isn't the case with CBRs. when my '93 RR was stock it was still able to run out of gear.

like i said, my bike topped out at 151mph on GPS. that's about as accurate as you're going to get. my speedo read 161-163mph. my '93 has the speedo off the front wheel. '95 & up speedo is off the tranny. so anyone with a '95 up RR with different gearing means they would be even more inaccurate.

anyway, all i'm saying is i doubt anyone has seen 180mph on a 900RR............

 

I was under the impression that the bike is limited by aerodynamic drag and not gearing. Meaning that it'll run out of power before it runs out of gear. So 161mph or whatever, but with another 3000rpm left. If the bike had 3grand left, and we're going all the way to the ignition cut off at 12,000rpm, then the bike would only be at 9000rpm. With the maximum power (stock) at 10,800rpm (something in that ballpark, it was 10,000something), then if you cut the gearing down a bit you could get the engine into a more powerful portion of the power band and therefore eek out a couple more mph.

Now if 15/45 is too much of a gearing chop on actual 900RRs instead of the theoretical world, I don't know. That's why I was wondering what rpm you were at when the bike was at 151mph with the 15/45. I could then figure out what true mph 12,000rpm translates too. I wonder if the earlier 900RRs have different gearboxes than the later ones. I know the ratios in the 29/54 are different than the '98/'99 9.

Now I've got 17/43 gearing and should have 200+whp in a couple weeks. I want to go to Bonneville and join the 200mph club SO BADLY. Might need a smaller rear gear.

 

66 what have you done to your ride to get that much power out of it?

 

Read the sig. Turbo.

 

Ok Ok Im with ducatijay on this one guys. It is impossible for a bike that has been gear differently than stock to run a faster top speed than a stock geared bike. All the previous posts all say bikes have dropped teeth on front and raised teeth on rear, this only improves the tourque the bike has under acceleration... nothing to do with top end speed. Bike wike will actually loose top end speed when the gear ratio has been dropped to a "quarter mile" gear set up. The bikes will feel faster and get to the final speed they will travel at a faster pace with the lower gear ratio but will not reach the same top speed as a stock geared bike.
The reason they run top speed tests at the salt flats is because it takes longer to get the vechiles upto speed due to the gearing being set for a top speed, have you ever watched those 200+ mph guys? They accelerate like turtles but once they get moving they FLY!

 

i've got a 93 900rr full exhaust haven't looked at everything else yet but i hit 165 - 170 on the way back from the dealership with only a month riding.