Hi All - I think this is a really obvious question but having not done it before I would welcome some advice…
I’m overhauling the forks on my Yamaha TTR 600.
They’re off the bike and stripped, new fork seals fitted.
The issue I have is measuring the the fork oil level, which is the manual says is 615cc / 160mm from top, fully compressed, spring out.
The problem is, in order to seal the bottom of the fork and fill it with oil, I need the hex bolt screwed in that also houses the rebound adjuster. However, they’re cartridge forks, so for this to be screwed in, it needs the cartridge and spring to screw into, meaning I can’t measure the level spring out??
I guess I could just guestimate 615cc in each fork measuring as best I can, but that doesn’t seem a great approach. Or should I just do that?
Just because its a precise measurement and I’m not sure what I’d use to measure it - unless that’s easily solved? Most stuff I’ve seen is in 50ml increments.
Well it’s a liquid so pouring it on the floor and using a ruler won’t work… I would go for a measuring jug , Sainsbury do a nice one with various scales on it in Pyrex.
Problem is it’s a cartridge fork so the spring is effectively directly attached to the rebound adjuster unit at the bottom. Think will just be a case of measuring the quantity then going from there.
That’s pretty precise… As it is I’ve decided to judge it using the scale on the oil container, close enough I’m sure given there’s 20mm tolerance in the air gap anyway. Thanks for your help.
