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Have got Mono Minis front and rear and both are pulling more to the bars than I would like before braking.
Have just bled them and they're clear of air. Topped up the oil before rolling the diaphragm back on as per Hope video, but they still take a bit more lever movement than I want before they bite.
What can I do to tighten things up and get them to bite earlier??
I found bleeding them without a spacer/disc between the pads worked to move the bite point a little bit...
Very difficult since it's meant to be an automatic function...
automatic function?
I've had mono minis for about 7 years, this summer I discovered they had adjustable bite points 😳 . Assuming yours are the same model or that newer models have the same feature, have a look on the inside of the lever where it pivots from the reservoir (I discovered this by being side on to the bike looking across the front, if that makes sense), there should be a little allen bolt, turn that clockwise and it should bring the bite point of the lever further out from the bars.
That isn't a bite point adjuster, that's a lever reach adjuster...
By defacto, it will move the bite point relation between lever and bar (ie, in and out), but it will still require the same amount of lever travel to reach the bite point.
The Mini lever is designed to self adjust the bite point as the pads wear down, there is very little you can do except mess around with bleeding...
Re messing with bleeding.
Have you tried loosening the reservoir caps, pulling the levers toward the bars with elastic bands, then leaving it overnight. Obviously, you'll have to park the bike upright, where it won't be knocked and make sure the reservoirs are level before loosening the caps. It works with my 7 year old Mono Minis, though.
If the pistons are sticky and not adjusting out as the pads wear, this can cause the bite point to move closer to the bars. Push the pistons back and then watch them whilst pulling the lever, they should move out on each lever pump, and then retract slightly. If they retract back to their original position after releasing the lever, the seals are dragging them back and the bite point will be too close to the bars. Lube the piston sides with a little dot fluid to try and free them up.
If they are working properly, you'll just need to adapt to the lever position.
As Spooky says, caliper pistons are most likely to be the culprit, though I'd prefer to use silicone lube as it's not corrosive like DOT fluids, and in an ideal world, i'd strip and clean the caliper rather than creating a grinding paste of lube and dirt (if you've ever seen the dirt behind the seals, you'll understand). Another cause can be worn lever blades/brass bushes, it's surprising how much free play that this can introduce too.