what can I expect when I change my front sprocket?

This topic has 5 replies, 4 voices, and was last updated 12 years, 11 months ago by Andrew Pachon.

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- September 20, 2013 at 5:21 pm #10400
  
  Matt Dixon
  Participant
  
  <span style=”color: #000000; font-family: ‘.HelveticaNeueUI’; font-size: 15px; white-space: nowrap; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.296875); -webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469);”>http://www.swedetechracing.com/tech_tips/gear_ratio_chart.html</span>
- September 20, 2013 at 5:44 pm #10401
  
  Chris Beebe
  Participant
  
  Link is not working so I went to swedtech and looked at the gear calculator. I can see the numerical change but how does this relate? Is there something I should be looking for? They dont really give you any info other than numbers?
- September 20, 2013 at 9:36 pm #10413
  
  Gary Smith
  Participant
  
  You can expect your rpms to increase 67 rpm per 1,000 rpm in each gear at the same speed. Just say with your present gearing you are coming out of a corner in 3rd gear at 8,000 rpm, changing to 15-25, at the same speed, you will be turning 8536 rpm. It will give you more punch out of the corner, but you will loose a little top end down the straight. Are you getting into to 6th in the longest straight? Are you maxing out your rpms in this straight?
  
  Gary
  
  Honda CR80 #55
- September 21, 2013 at 6:31 am #10422
  
  Chris Beebe
  Participant
  
  I am getting into 6th in the one big straight we have but by no means am I maxing out the rpms. Sounds like this may work out well for me.
- September 21, 2013 at 11:04 am #10428
  
  Andrew Pachon
  Participant
  
  Great explanation Gary.
  
  Thank you for sharing.
  
  ~Andy
  
  <div>Gary Smith wrote:</div>
  You can expect your rpms to increase 67 rpm per 1,000 rpm in each gear at the same speed. Just say with your present gearing you are coming out of a corner in 3rd gear at 8,000 rpm, changing to 15-25, at the same speed, you will be turning 8536 rpm. It will give you more punch out of the corner, but you will loose a little top end down the straight. Are you getting into to 6th in the longest straight? Are you maxing out your rpms in this straight? Gary Honda CR80 #55
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