I feel you only need to change the countershaft for a large change in speed.
Here is a link to a post I made viewtopic.php?p=153447#p153447
and here is a table of gear ratio and speed calculations.
How-To: Install a final drive gear up kit
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Ozzibiker
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Re: How-To: Install a final drive gear up kit
This is a great post.
I feel you only need to change the countershaft for a large change in speed.
Here is a link to a post I made viewtopic.php?p=153447#p153447
and here is a table of gear ratio and speed calculations.
I feel you only need to change the countershaft for a large change in speed.
Here is a link to a post I made viewtopic.php?p=153447#p153447
and here is a table of gear ratio and speed calculations.
Honda PCX 150 - 2016
Honda VFR400 - 1989
Honda VFR400 - 1989