ratio of shock linkage and extensions?

Ernest Montague afm199 at earthlink.net
Sun Oct 12 23:33:44 PDT 2008

Talking gen one yes

The reason I measure axle to frame is that no calculation is needed.   
Once I find the number I want, extended axle to frame, it remains the 
same regardless of what forks, or how much or little shows.  Ditto the 
rear shock. I set the length rear shock and front axle to frame, end of 

Same distance on the SV stock front end, the ZX6r front end I ran, and 
the GSXR front  I run now. I have use three front ends on the bike, I 
set them all with the same axle to frame distance....

You measure from the top of the triple to fork cap, you need a 
different set of numbers for each set of forks, Why bother?

On Oct 12, 2008, at 8:56 PM, matthew patton wrote:

>> 1 mm raises the rear about 3mm IIRC
> I hope we're talking G1.
>> Did  you MEASURE the actual axle to triple length fully
>> extended fork?
> no. any anyhow the lower portion of a GSXR750 triple and an SV is 
> dramatically different.
>> That is what counts. What sticks above the top triple is
>> not important.
> I'm not sure why you'd say that. it's a fixed location. If the bottom 
> of the triple is fine then the top is good too. ditto bottom or top of 
> the head stock.
> the 'deck' height of the gsxr750 upper triple and that of a stock SV-N 
> upper triple is exactly the same. If my forks are longer by 20mm (that 
> much more shiny upper showing) I don't understand why I can't safely 
> say the axle is also 20mm displaced downward at 25deg (rake angle) 
> too. the fork lowers are a fixed constant, I'm using SV lowers. Sure, 
> if I put GSXR lowers on there then I'd *have* to measure from axle 
> center to get anything resembling a useful number.
> I hadn't thought thru fully about how much the axle had moved 
> vertically by virtue of 20mm longer forks. it's 20 * cos 25 = 18mm. 
> and the 70 profile is actually 11mm for a total of 29mm. So I need to 
> drop the forks and/or raise the rear to come back to zero.

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