new Mosfet based Relay starter replacement

[spyrius]

Hi All,

I hope this is the right place to post following note:

I am developing mosfet based starter relay replacement and need to know lengths of following cables for VFR400 / cbr 400:

BATTERY <-> relay (red cable)
Starter motor <-> relay (black)
BATTERY <-> ground (black)

Thanks in advance.

Furthermore, anyone interested in testing units on their Honda's (limited to 2 people maximum) can drop me an email to mrnelectro@gmail.com along with your bike year/specs and post adress and I will send unit free of charge (UK users only, anyone overseas will have to pay £5 to cover extra postage). Please do not ask for mosfet modules if you never worked/maintained motorcycle and if you are not frequent rider. Please bear in mind, that those are prototypes and I do not bear any responsibility for potential loss, damage, fire or anything accident related. You test them and keep them on your own risk .

In return, I ask for short write up of level of motorcycle usage, installation difficulties/recommendations and overall opinion.

Relays are based on automotive mosfet switching technology, with following advantages over OEM relay units:

more cranking current capability (over 180% in comparison to OEM relays). Tested to 280Ampers for duration of 40seconds in one go until car battery was depleted.

higher durability, as there is no wear on contacts... there are none (semiconductor switched). Every OEM relay will fail sooner or later, as there is constant wear on contacts due to arcing/temperature stress.

conductance loss is much better, as there is <2 mΩ in module (OEM specs are anywhere between 20mΩ - 100mΩ on contacts). Therefore, there is less wasted power on relay itself (whole reason why OEM units are hot when cranking motorcycle is because of conductance loss on contacts)

No stress on handlebar switch/harness wiring , as module draws only 1mA when switched on from handlebar ignition button/secondary relay (OEM demands anything from 400mA to 1200mA)

Voltage/current spike protection included within module. Should protect ECU/ignition module from starter motor commutator spikes.

Modules are direct replacement for most of Honda relays with 4 way relay connector. Module has own cables attached. Replacement should be easy, is pretty much direct swap. (take out seat, remove OEM relay along with all 3 cables, retain battery rubber plugs, plug in mosfet module and you are ready to go). Detailed instructions will be sent along with package. Only screwdriver/wrench is required in process to access/remove stock OEM relay.

I have tested prototypes on my SV650s (6months in use so far, constant daily commute) and friend's Aprilia Mille (2months so far in use). Any motorcycle with high compression engine ,high starter gearing or history of relay failures will benefit from upgrade. Prototype was tested on 9t lorry starter motor, ducati999 and my spare sv650s starter motor.

Will run a units production batch after primary testing and under condition of enough interest from forum members. Forum members will also benefit from 20% discount afterwards.

If any questions, drop me an email and I am happy to answer.
Cheers,
Roman

Btw, I used to have VFR400 (1989 with orange wheels) and black 1991 CBR250rr. I Miss those TROUSER FIREWORKS with gear whine every day :) .

[spyrius]

:) dunno why "pocke t rocket s" words have been replaced with trouser fireworks

[thunderace]

In all my years of working with motorcycles I've only ever come across a small handful of solenoid failures and they've all been down to corrosion. I like your idea, its something I have used myself on industrial engine control panels and I took the idea to lotus when I did some prototype work for them a few years ago.

In all honesty I can't see a big market on this, sorry.

[Morespeedvicar]

Hi, I'm looking for a solenoid for when i finish my klr650 engine rebuild, it was kickstart but now i've got spine damage and lost the strength in me legs and converting it to electric start, so wondered how much you looking for a unit, it be perfect for the trail market cos there always covered in mud!

Cheers
Ian