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TRX450R-Close Ratio Transmission

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  #1  
Old 02-09-2004 | 08:40 PM
reconranger's Avatar
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Default TRX450R-Close Ratio Transmission

Gear ratios, 1st -5th:
2.071
1.625
1.333
1.120
0.963

400EX for comparison:
2.917
1.938
1.474
1.182
1.000
 
  #2  
Old 02-09-2004 | 09:18 PM
steadyfreddie's Avatar
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Default TRX450R-Close Ratio Transmission

No wonder it feels so tall. It is.
 
  #3  
Old 02-09-2004 | 11:57 PM
reconranger's Avatar
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Default TRX450R-Close Ratio Transmission

Sprockets are 38/14, just like the 400EX.
 
  #4  
Old 02-10-2004 | 12:38 AM
BG400's Avatar
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Default TRX450R-Close Ratio Transmission

So does that mean the 450r has more speed or more low end grunt??
 
  #5  
Old 02-10-2004 | 12:44 AM
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Default TRX450R-Close Ratio Transmission

Probably both
 
  #6  
Old 02-10-2004 | 01:00 AM
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Default TRX450R-Close Ratio Transmission

lower gear ratios mean higher top speeds. You will notice the 450 has a much lower 1st gear ratio, giving up some low end grunt. But 5th on the 450 is just a little lower than the ex, losing top end.

The point of the post, however, is the ratios and thier relation to each other. Notice that the difference in the gear ratios of the ex is larger between any 2 gears than in the 450. This means that the rider needs to shift faster throughout the powerband.
 
  #7  
Old 02-10-2004 | 01:18 AM
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Default TRX450R-Close Ratio Transmission

ok, i'm a lil confused. on the 450, because of the close ratio gearing, do u have to shift faster? or is it that with the 400 cuz of the lack of close ratio gearing, that you have to shift faster?
 
  #8  
Old 02-10-2004 | 03:25 AM
reconranger's Avatar
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Default TRX450R-Close Ratio Transmission

On the 450, the steps between gears are smaller. So, you are going to run out of gear sooner, and therefore need to shift sooner. On the other hand, you don't want to short shift the 450, because the motor does its best work at higher RPM.
 
  #9  
Old 02-10-2004 | 11:48 PM
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Default TRX450R-Close Ratio Transmission

ok, kool. that reminds me of when i rode my buddie's yfz 450 after riding my 400EX. if i pulled a gear low while turning, it would stall, but i felt like i was shifting every half second when accelerating. i prefer the way the EX is set up. jmo
 
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