I've muttered that I was putting my zx7r on a diet, and I'm taking my sweet time doing it, but I got the second major mod done so thought I would start a thread where I put everything. I think by spring I'll be done as its the only bike I'm really working on over the winter....this last year I had 3 others I was messing with.
Anyway - I set a goal of 50# off OEM weight, and do it on a budget.
The front end swap is here... long story short the 10R front end saved 8 pounds between forks, wheel, brakes, clip ons:
http://www.kawiforums.com/zx-7r/149796-zx10r-front-end-swap.html
First post here will be the swingarm swap which met expecations nicely.
After buying a few swingarms I went with a 2000+ zx9r. It was $50 shipped to my door with pivot bolt, rear axle and spacers, caliper bracket. It has a similar faceted look like the 7R frame (too bad the color is off), is just a little longer (5/8") and uses the same 25mm axle/pivot sizes. I also expect the ZX9R arm will have suitable stiffness for the ZX7R.
Actual fitment is pretty easy, provided you can make/modify your own spacers.
1- Take the pivot seals out of the zx9r swingarm and put them in the opposite side.
2- I had to shave the threaded chain-side spacer down ~.125" to get proper chain alignment. I took about .030" of that off the square face
3- I made a new spacer for the brake side that was .180" longer than the stock 7R/9R spacer to make a tight fit in the frame...the round spacer in the pic below was the original.
4- Bolt up the pivot just like a zx7r
From here, bolt up a 2000-03 zx9r rear wheel, rear caliper/brakcet. The ZX9R rear axle uses one of the slider block to hold it so is a one wrench affair to loosen the axle nut. The jamb nut on the pivot is also aluminum.
I'll be using a 45T 520 aluminum sprocket and a Braking USA wave rotor on the rear (much like Galfer wave rotors). Last will be aluminum dog bones after I try a couple linkages to work out the rear end ride height...I have a hunch that a zx9r link will be perfect, but don't have one around to put in yet.
The weight reduction tally here is significant.
- wheel - 5#...yes the zx7r wheel is that much of a boat anchor.
- Swingarm 4#
- Braking wave rotor, aluminum sprocket and dog bones: 3#
- Rear caliper 1#
So the swingarm swap saves 13#, mostly rotating and/or unsprung. so I'm 21# to my goal.
Other quick hitters
- 9Ah battery instead of 12Ah - 3# pounds
- Carbon Fiber Snorles - 3#
- Fully Muzzy Exhaust (the header/cannister weigh ~17# total)- I'm guessing this will save ~ 15-20#
- 520 chain...it will save something, maybe a pound.
- Float bowl and KLEEN valve system removal - 2-3#...I don't have all the stock parts to weigh
So just the stuff listed here gets me ~40-45#....sweet.
The ZX9R wheel is still heavier than some other 6" wheels. I also picked up a Ducati Monster rear caliper and bracket which was silly light (another pound off the already lighter ZX9R caliper/bracket), but the caliper interfered with the wheel.
Anyway - I set a goal of 50# off OEM weight, and do it on a budget.
The front end swap is here... long story short the 10R front end saved 8 pounds between forks, wheel, brakes, clip ons:
http://www.kawiforums.com/zx-7r/149796-zx10r-front-end-swap.html
First post here will be the swingarm swap which met expecations nicely.
After buying a few swingarms I went with a 2000+ zx9r. It was $50 shipped to my door with pivot bolt, rear axle and spacers, caliper bracket. It has a similar faceted look like the 7R frame (too bad the color is off), is just a little longer (5/8") and uses the same 25mm axle/pivot sizes. I also expect the ZX9R arm will have suitable stiffness for the ZX7R.
Actual fitment is pretty easy, provided you can make/modify your own spacers.
1- Take the pivot seals out of the zx9r swingarm and put them in the opposite side.
2- I had to shave the threaded chain-side spacer down ~.125" to get proper chain alignment. I took about .030" of that off the square face
3- I made a new spacer for the brake side that was .180" longer than the stock 7R/9R spacer to make a tight fit in the frame...the round spacer in the pic below was the original.
4- Bolt up the pivot just like a zx7r
From here, bolt up a 2000-03 zx9r rear wheel, rear caliper/brakcet. The ZX9R rear axle uses one of the slider block to hold it so is a one wrench affair to loosen the axle nut. The jamb nut on the pivot is also aluminum.
I'll be using a 45T 520 aluminum sprocket and a Braking USA wave rotor on the rear (much like Galfer wave rotors). Last will be aluminum dog bones after I try a couple linkages to work out the rear end ride height...I have a hunch that a zx9r link will be perfect, but don't have one around to put in yet.
The weight reduction tally here is significant.
- wheel - 5#...yes the zx7r wheel is that much of a boat anchor.
- Swingarm 4#
- Braking wave rotor, aluminum sprocket and dog bones: 3#
- Rear caliper 1#
So the swingarm swap saves 13#, mostly rotating and/or unsprung. so I'm 21# to my goal.
Other quick hitters
- 9Ah battery instead of 12Ah - 3# pounds
- Carbon Fiber Snorles - 3#
- Fully Muzzy Exhaust (the header/cannister weigh ~17# total)- I'm guessing this will save ~ 15-20#
- 520 chain...it will save something, maybe a pound.
- Float bowl and KLEEN valve system removal - 2-3#...I don't have all the stock parts to weigh
So just the stuff listed here gets me ~40-45#....sweet.
The ZX9R wheel is still heavier than some other 6" wheels. I also picked up a Ducati Monster rear caliper and bracket which was silly light (another pound off the already lighter ZX9R caliper/bracket), but the caliper interfered with the wheel.
