Trying to speed up
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Joined: Oct 2012
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interesting story in SSB, if you try to change the rear sprockets to make the bike "quicker", you'll dyno less hp....
same dyno, same bike, same day
stock gearing dyno'd highest (150.1hp)
-1/+2 lost a few hp(-2hp)
-1/+5 lost the most hp (-4.5hp)
it makes sense if you think about it. when you dyno a bike - you don't dyno it in first gear.... you dyno it is your highest gear. and that's because it gives you the most hp - and your motor is doing the most work. if your motor can do less work (like with different sprockets) you'll dyno less hp. interesting story
same dyno, same bike, same day
stock gearing dyno'd highest (150.1hp)
-1/+2 lost a few hp(-2hp)
-1/+5 lost the most hp (-4.5hp)
it makes sense if you think about it. when you dyno a bike - you don't dyno it in first gear.... you dyno it is your highest gear. and that's because it gives you the most hp - and your motor is doing the most work. if your motor can do less work (like with different sprockets) you'll dyno less hp. interesting story
Retired Super Moderator and Fighterer
Joined: Nov 2006
Posts: 6,146
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but they didnt have those numbers in that article, just the hp numbers
edit- but lets be clear, this is JUST for numbers on a dyno. that's not saying that your bike makes more hp with a smaller rear sprocket. it just registers higher readings. if torque registered higher in lower gears (motors under less load), you'd see diesels doing their runs in a low gear, but they don't - they do them all in high gears. and while they do care about hp, the thing they tend to brag about is how much damn torque their trucks make.
Last edited by Conrice; Feb 15, 2013 at 06:30 PM. Reason: clarification
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