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Need some advise to guide dialing in the front suspension on subject bike.
I swapped out the front suspension on the Nighthawk S (39mm stanchions) to go with a 1999 VTR 1000 fork lower/4 pot fixed calipers, VFR 750 cartridge, and custom length 41mm stanchions.
- I had to go with custom length stanchions because they are almost 3" longer than the VTR's so I can keep the NH-S head geometry close to stock.
- I used the stock VFR cartridge because I had it, the control rods were straight, and because the weight of the NH-S and VFR are close.
I am looking for how much fork oil to put in. I have the stock VTR measurement, but believe I have to compensate for the additional air volume due to the longer stanchions. I could look for a solid spacer at the top and keep the oil level the same or increase the oil level a bit more. My previous measurements indicate a 80% oil/20% air is the right ratio and was planning on using that to determine correct height - unless someone else has worked through this before.
Hopefully I don't get flamed for my 1st question...
Thanks
Jerry
I swapped out the front suspension on the Nighthawk S (39mm stanchions) to go with a 1999 VTR 1000 fork lower/4 pot fixed calipers, VFR 750 cartridge, and custom length 41mm stanchions.
- I had to go with custom length stanchions because they are almost 3" longer than the VTR's so I can keep the NH-S head geometry close to stock.
- I used the stock VFR cartridge because I had it, the control rods were straight, and because the weight of the NH-S and VFR are close.
I am looking for how much fork oil to put in. I have the stock VTR measurement, but believe I have to compensate for the additional air volume due to the longer stanchions. I could look for a solid spacer at the top and keep the oil level the same or increase the oil level a bit more. My previous measurements indicate a 80% oil/20% air is the right ratio and was planning on using that to determine correct height - unless someone else has worked through this before.
Hopefully I don't get flamed for my 1st question...
Thanks
Jerry
