For some time my 2010 45,000m R3's manual transmission has been very notchy particularly in the lower 4 gears. It's much worse when trying fast gear changes and a little worse when cold. Sometimes when cold it strongly resists going into first despite double declutching and lots of stick waggling, only slotting home after I put it in another gear first. For the moment I'm living with it as I rarely drive without my disabled wife who can't tolerate fast driving.

As it's notchy in more than one gear I doubt that there's a synchro issue. I've tried several premium transmission oils without much, if any, difference. The clutch seems to be disengaging OK and I can't see anything wrong with the pedal.

All I can think of is that enthusiastic gear changes on track days have somehow bent the selection mechanism.

I have a copy of Mazda's P66M-D workshop manual but have no experience with transmissions and I have no SSTs. She's my only car so I don't want to risk her being off the road for long, leaving me having to get a replacement transmission (say $1300 here in the UK + $500 for a new clutch as necessary), swapping over and seeing what I can do with mine.

Please give me the benefit of your opinions. TIA.

 

Clutch mc and sc may be getting weak,
Clutch pedal cracking.
Shifter bushing wear,
Engine mounts busted,
What fluids have you run?
or like you said shift forks