KIPS vs EXUP servos
Posted: Tue Sep 07, 2010 8:58 pm
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I dont know if this will work yet
I had previously considered if something could be fabricated from a Tamiya gear box kit (worm drive version)
or Radio Control servos - obviously donour part thats does equivalent job would be ideal
My main reason for looking into swapping the KIPS servo
is to find something lighter to save weight
As many will know the Yamaha R1 and R6 (and older YZF) use a servo motor to open and close the EXUP valve in the exhaust collector for noise and power functions
The KR-1 KIPS servo (Exhaust Valve Operating Motor) weighs in at 884 grams (with two cables and bracket)
The R6 servo with bracket (no cables) weighs only 291g SAVE approx 0.55kg !
below is late model R6 servo made by MORIC
the assembly appears to have approx 34mm of cable actuation (push/pull 17mm),
of course this could be altered if required by using a bigger cable pully
inside the sealed (ABS?) enclosure is a simple small DC motor with reduction gears and worm drive
on the final output gear attaches is a small rotary potentiometer with three takeoffs - the computer must recognise the position the pulley is in by the resistance from the three signals and supplies power to the motor in positive or negative direction by swapping the DC supply voltage?
The last 2 of 5 connection pins are +ve and -ve supplies to the motor itself
The KIPS servo connects to the CDI with 2 plugs - a 2 pin and a 3 pin connector
I am assuming the 2 pin is + and - power for the drive,
but I dont know if the other 3 connections are for resistance or some kind of internal microswitch
perhaps somebody with sparky inclination will know the answer ( Borut? )
the KR-1 service manual would indicate the 3 pins are also resistances - so far looks to be promising part swap
DENSO servos...
ZX-6R / ZX-10R servos 407g (with bracket) save 434 grams
... similar to GSXR600/750 servo 320g (without bracket) - GSXR1000 servos complicated by a vacuum/pressure switch (not required)
.
I dont know if this will work yet
I had previously considered if something could be fabricated from a Tamiya gear box kit (worm drive version)
or Radio Control servos - obviously donour part thats does equivalent job would be ideal
My main reason for looking into swapping the KIPS servo
is to find something lighter to save weight
As many will know the Yamaha R1 and R6 (and older YZF) use a servo motor to open and close the EXUP valve in the exhaust collector for noise and power functions
The KR-1 KIPS servo (Exhaust Valve Operating Motor) weighs in at 884 grams (with two cables and bracket)
The R6 servo with bracket (no cables) weighs only 291g SAVE approx 0.55kg !
below is late model R6 servo made by MORIC
the assembly appears to have approx 34mm of cable actuation (push/pull 17mm),
of course this could be altered if required by using a bigger cable pully
inside the sealed (ABS?) enclosure is a simple small DC motor with reduction gears and worm drive
on the final output gear attaches is a small rotary potentiometer with three takeoffs - the computer must recognise the position the pulley is in by the resistance from the three signals and supplies power to the motor in positive or negative direction by swapping the DC supply voltage?
The last 2 of 5 connection pins are +ve and -ve supplies to the motor itself
The KIPS servo connects to the CDI with 2 plugs - a 2 pin and a 3 pin connector
I am assuming the 2 pin is + and - power for the drive,
but I dont know if the other 3 connections are for resistance or some kind of internal microswitch
perhaps somebody with sparky inclination will know the answer ( Borut? )
the KR-1 service manual would indicate the 3 pins are also resistances - so far looks to be promising part swap
DENSO servos...
ZX-6R / ZX-10R servos 407g (with bracket) save 434 grams
... similar to GSXR600/750 servo 320g (without bracket) - GSXR1000 servos complicated by a vacuum/pressure switch (not required)