F4i Gear Position Sensor

[Erich Ohlde]

Has anyone ever tried to put some type of potentiometer on the shift drum to sense what gear the tranny is in? I'm thinking this is gonna be a project for me this summer if no-one else has.

[Erich Ohlde]

Has anyone ever tried to put some type of potentiometer on the shift drum to sense what gear the tranny is in? I'm thinking this is gonna be a project for me this summer if no-one else has.

[95M3Racer]

Well I'm not sure if someone did on the F4i specifically, but there have been many done. Its baiscally just a rotary pot on the end of the main shaft.

Any reason you want a sensor and not do it with software?

They have nuetral lights frm the factory...

[Randy Van der Ree]

The GSXR-600 motor, already have the GPS. maybe you want to check how it is done, and do something similar. It is a potentiometer.

[Colin]

we put a gear detection pot on last years car which ran an f4i. It did take a little bit of work, we made a sort of screw in fitting with a little spindle that had a little plastic gear on the end of it and screwed that into where the neutral switch goes. we then put a matching gear on the shift drum. On the end of our fittings we attached a small rotary pot which was read by our microcontroller and displayed on the steering wheel, It took a little bit of fiddly machining but it worked well

[Erich Ohlde]

do you have any pictures?

[Sam Acacia]

I am trying to design a gear position indicator for an f4i too. I would appreciate it if I could see any pictures of your system or if remembered any setbacks you had.

[Colin]

check out the photo gallery I've put a couple of pics up, i was wrong about the plastic gears we ended up using metal one's, one of the harder jobs was getting the gear on the shifter drum, that stuff is hard. and I know this pretty obvious but make sure nothing can come apart in there

[Erich Ohlde]

what gallery did u put them up on. I can't seem to find the pic on your website

[Colin]

it's in the gallary on this website

[James Montgomery]

Colin,

How did you fix the sprockets to the two shafts? The barrel is causing us problems because its so hardcore and difficult to modify.

James

[Colin]

The shifter drum was "modified" using the very precise method of a hand held angle grinder clamped to a welding table and a very steady hand grinding enough of a shoulder to press the gear on, it was then loctited into place. Once the drum is in place even if the loctite fails the gear can't fall off and cause any damage. The other gear was grub screwed and loctited, not as safe but we where very careful with all fit's and the installation and never had a drama with anything