The reason for this? I've been rolling off the edge of the stock 160/70 tire with only mildly aggressive riding on the road so I need some more rubber.
I've kept the stock parts so that when i get to the track on the 28th I can switch wheels between sessions and my data logger can tell me which setup gives better corner speeds and lap times in addition to the seat-of-the-pants feedback.
Anyway, the whole process started when I found a 180 conversion kit on ebay. The seller was selling captured spacers and machining services to modify the buyers own stock SV parts to make the process easy.
I have a cnc mill (but no lathe) so I just ordered the spacers for a nice big discount and the seller was generous enough to provide me with the dimensions to modify the cush drive and caliper carrier. Funny thing - these dimensions turned out to be wrong, by 7mm, or about 50%. More on that later.
Anyway, once I ordered the spacers I started hunting for a wheel on eBay. I found a bargain - $79 for a wheel in perfect condition, including tire, cush drive, disc and cheap shipping ($30). It was even the perfect colour.
Next up I ordered a spare caliper carrier for $15. This is so i can swap wheels in only a few minutes.
I then chucked the carrier in the mill and reduced the thickness by the amount specified by the ebay seller.
I did the same on the cush drive. (I dont have a rotary table, and my mill is small so i had to do the cush in sections so its not pretty. When i find the right table I'll get another cush and do it right)
The spacers were just about perfect so once all the machining was done I was looking forward to assembling everything. Well, lets just say that after some fiddling and fussing and much head scratching I realised it just wasnt going to work. I measured everything to verify the numbers I was given and found that the total length of all 4 spacers was more than the width of the swingarm. Not good.
After removing another 7mm from the caliper carrier the wheel slid in perfectly. Now there is about 1mm difference in the position of the sprocket relative to the stock wheel. I can live with that.
So thats it for this mod. Next up is some custom made rearsets. I'd like to have these done for the track day but I have a lot of other things to work on.
Before this project I fitted a GSX-R1000 shock:
(nearly perfect spring weight to suit me), and of course the whole front end from a GSX-R1000 (again, springs nearly perfect for my weight) then adapted a custom made hall-effect sensor to the stock wiring harness so the speedo will work.
One last thing was the battery. The GSX-R shock intrudes into the stock battery box. I spoke to Grinner about his battery and liked the idea but not the $230 pricetag. I did some research and found the LiFePo cells from his battery for sale by the dozen. I made up 2 packs and fitted them in the tail section. The data logger will keep track of the charge/discharge current, as well as monitoring temps until I know everything is running fine.
This pair of batteries weighs 1/4 of a standard Pb-acid battery and are half the size. And the 2 even cost less if you know how to build them!
PM me if you want any more details.
Shaun.
