mom
220cc in each leg
From my under standing if your riding MOTO, with a fork oil level gauge you measure put 110 mm.
3 oz each fork. automatic transmission fluid is ok to use.
you apply oil to the suspension area and then push it up and down to work the oil in.
it depends on the year and model or the bike any where from 6 to 8 oz
My owners manual says 140cc or 4.7 ozs.
Capacity for each leg for VT700 and 750 For 1986 and on it is 442.5 - 447.5cc (14.99 - 15.16oz)
First, is this a 1987 1200, last year for 1200's, or is this a 1500, 1988 ? 1987, 1200, fork oil, If you just change the oil without doing a full teardown then 323 cc ( 10.9 oz ) If the fork's have been taken apart for new seals then, 345 cc ( 11.7 oz ) Ask your local dealer for the right oil.
16.6 US Fluid oz of SAE 10W oil, and 19.5 US Fluid oz if completely disassembled and dry.
The best way to replace fork oil in these forks is to measure the oil level with fork springs removed, fill the forks with aprox 350cc's, pump the forks a few times to fill the damper and anti-dive valves at the bottom, then compress the forks (without springs) and measure about 5.5" to 6" inches from the top of the tube to the top of the oil level INSIDE the fork. You should only have to add another 50cc. Total about 400cc's. Extend the fork, replace the springs and caps. The forks should have enough oil to work properly, and not hydraulic lock from too much oil. (If you have put too much oil in, the forks will feel like they bottom before using all the travel.) mike
According to the American Voyager Association:"We would suggest changing the fork oil should be a regularly scheduled maintenance item. It should be done every other year! Recommended oil is 10w fork oil. There are two ways to go about changing the oil. The easy way is to drain out the old oil from the plug at the bottom of the fork. Remove the wheel and pump the lower fork tube up and down until no more oil comes out. When changing the oil, the shop manual says replace it with 330mL of new oil. However, if you completely remove the fork, disassemble it, and clean it, the shop manual recommends 391mL + or- 2.5mL. I have never figured out why, but many times each fork will require more or less fluid to reach the correct height in the fork tube. The correct way to put just the right amount of fluid in, is to pump the lower fork tube up and down several times to get the fluid into all of the cavities. After doing this, fully compress the fork tube and measure down from the top 140mm + or - 2mm. This is the correct amount of oil to have in each fork with stock fork springs. Sometimes you have to add some fluid, other time you need to take some out. But this is the only way to make sure both forks have exactly the right amount of fluid.