Removing a CB1000's speed limiter?

[enzo]

hi does anybody have any info on how to remove speed limiter on a 93 cb1000 big one? for track use only ofcourse:yes:

[spanner spinner]

does your bike have a electronic speedo, if so the easiest way i have found is to fit a speedo healer and then set it to half reading so that at 180kmph the bike thinks it is doing 90 fooling the limiter.

[ducatilover]

Either a wheel/magnet on the rear of the speedo unit (inside the housing) that passes through something to create a circuit, or if you have a gear indicator it may run off that.
I can have a look at it if you are up near Bunnythorpe/Feilding at any time.

[enzo]

does your bike have a electronic speedo, if so the easiest way i have found is to fit a speedo healer and then set it to half reading so that at 180kmph the bike thinks it is doing 90 fooling the limiter.

yes iam pretty sure it is electronic . when i got the bike it was geared way down so it went quite a bit faster before cutting out, (atleast 225kmh, last look before pinning it) but was really hard on the clutch to get it off the line.
ive since geared it one tooth up on rear sprocket from factory and now speedo reads 190kmh whilst cuttiing out but it is only reading 175 on my gps.:facepalm:
fittting a speedo healer and then fooling it will my speedo read correctly? excuse the lack of knowledge in this area.
cheers mitch

[enzo]

Either a wheel/magnet on the rear of the speedo unit (inside the housing) that passes through something to create a circuit, or if you have a gear indicator it may run off that.
I can have a look at it if you are up near Bunnythorpe/Feilding at any time.

sweet offer cheers. that could very well be a plan. i have two weeks off work now, when would you most likely have time to have a nosy at it.
really aprreciate it, pm me or i think my mobile numbers on my profile page.

[White trash]

Slow down Rossi.

[ducatilover]

If it's an electronic system I can't help, but if it has a mechanical speedo I can look.
Sounds more like you have an RPM cut out that's linked to CDI unit/gear position sensor, that'll require speedo healer for your speedo accuracy and a resistor to fool it into thinking it's in second gear or any gear that won't top 180.

[spanner spinner]

the speedo will show half speed if it is set up that way to fool the speed cut out. you soon get use to it and it is easy to double what ever speed is showing on the speedo to get a true speed. there is only one switch to throw on the speedo healer box to set it to half speed, if you leve it accessable under the seat it is easy to change modes between true speed and half speed to suit the riding you are doing that day.

[DEATH_INC.]

I'm gonna take a stab in the dark and guess it has carbs, so prolly no gear position sensor. I'd also guess like most of 'em back then it has a mechanical speedo, not electronic. If that's the case it should have a plug with 3 wires coming out of the back of the speedo. If it has this you can join 2 of the wires together to defeat the limiter. If ya take a look and it is this setup I'll try to find the wire colours that you join.
Pretty much all the honda's had it done this way back then.
Lemme know.

[ducatilover]

I'm gonna take a stab in the dark and guess it has carbs, so prolly no gear position sensor. I'd also guess like most of 'em back then it has a mechanical speedo, not electronic. If that's the case it should have a plug with 3 wires coming out of the back of the speedo. If it has this you can join 2 of the wires together to defeat the limiter. If ya take a look and it is this setup I'll try to find the wire colours that you join.
Pretty much all the honda's had it done this way back then.
Lemme know.
I had a looksie and as expected with the unit in the speedo unplugged it lowers the limiter to 5500rpm, just like my ZZR600/400 does. I can't take the limiter unit out ad the speedo is waterproof/sealed :facepalm:

Wires:
Orange/blue stripe.
Green/black stripe
Brown

I'm assuming orange/blue goes to the cdi, green could be ign and brown gnd. Can't test it, my multimeter has a dead batterey

[enzo]

I had a looksie and as expected with the unit in the speedo unplugged it lowers the limiter to 5500rpm, just like my ZZR600/400 does. I can't take the limiter unit out ad the speedo is waterproof/sealed :facepalm:

Wires:
Orange/blue stripe.
Green/black stripe
Brown

I'm assuming orange/blue goes to the cdi, green could be ign and brown gnd. Can't test it, my multimeter has a dead batterey

sweet how do i test it? i have multimetre here.

[ducatilover]

sweet how do i test it? i have multimetre here.
I'd start by seeing which ones go back to the cdi box
I think if you can send me the link to the diagram I can figure it out

[ducatilover]

If you connect the lowest voltage to the ground, I think that'll get the cunt.

[DEATH_INC.]

Pretty sure you join the orange and brown ones together ( from memory the brown has 12v and the orange goes back to the ignitor) and leave the plug out. I used an old plug and made a loop on it to do this and just plugged it in where it normally plugs into the speedo.

[ducatilover]

Pretty sure you join the orange and brown ones together ( from memory the brown has 12v and the orange goes back to the ignitor) and leave the plug out. I used an old plug and made a loop on it to do this and just plugged it in where it normally plugs into the speedo.
So we want to send a 12V signal to the CDI?
Makes sense, if the hall effect thingy cuts the circuit, then it's limited to 5500 rpm in whatever gear it's in.


sweet how do i test it? i have multimetre here.
If you get stuck, bring it 'round. Or bash the fucker.

[DEATH_INC.]

Yup, it's worked on every honda I've tried it on.

[enzo]

I'd start by seeing which ones go back to the cdi box
I think if you can send me the link to the diagram I can figure it out
i checked the link to owners manual again but does not include the wiring diagram sadly.

[enzo]

sweet. will try this tommorow, far to windy for top speed runs atm

[ducatilover]

Connect the 12V one to the one that ends up in the CDI and if Death_inc isn't telling porkies we have both sorted ours out! :Punk:

I got my multimeter going again, had a fucked contact.
My plug seems to be sorted, I won't know 'till I ride it though. :laugh:

[nzspokes]

These CB1000s seem a great bike for the money they are selling for.

[enzo]

i dont get a 12 volt reading from either of the wires, i do however get a 9volts from the black wire/brown strip. with the key on reads 9 volts and with engine running 9 volts also. found that the orange wire/blue strip goes to cdi.

[enzo]

These CB1000s seem a great bike for the money they are selling for.

cheers. i think so, very comfy plenty of torque exceptional rideability and down right STAUNCH:Punk:

[ducatilover]

i dont get a 12 volt reading from either of the wires, i do however get a 9volts from the black wire/brown strip. with the key on reads 9 volts and with engine running 9 volts also. found that the orange wire/blue strip goes to cdi.
I'd wire that the Black/brown to the Orange/blue.
If it revs over 5500 you should be winning, if you do win, you have to do a skid.

[enzo]

I'd wire that the Black/brown to the Orange/blue.
If it revs over 5500 you should be winning, if you do win, you have to do a skid.

wildo, will it be necessary to plug it back in after? i can live with A skid

[nzspokes]

cheers. i think so, very comfy plenty of torque exceptional rideability and down right STAUNCH:Punk:

How do you find the weight of it? I sat on a CB1300 and was a bit concerned if it started to fall I couldnt catch it.

Are they a little smaller in size to a cb1300?

[ducatilover]

wildo, will it be necessary to plug it back in after? i can live with A skid
Nope.
I have chopped the wires to my broken speed limiter unit and wired the 12v/power wire to my gay pink one going to the CDI.
Could possibly just chuck my rangi plug in yours and see if it works

[nzspokes]

Nope.
I have chopped the wires to my broken speed limiter unit and wired the 12v/power wire to my gay pink one going to the CDI.
Could possibly just chuck my rangi plug in yours and see if it works

Could you just paper clip the plug to try it out?

Got one sensor on me car jumper like that.

[enzo]

How do you find the weight of it? I sat on a CB1300 and was a bit concerned if it started to fall I couldnt catch it.

Are they a little smaller in size to a cb1300?

shes fairly hefty, i havent had any trouble with the weight myself. i like that its solid. one tip for you if you were to buy one... keep in mind the weight of the bike when entering corners.

[enzo]

done... update tommorw.

[nzspokes]

shes fairly hefty, i havent had any trouble with the weight myself. i like that its solid. one tip for you if you were to buy one... keep in mind the weight of the bike when entering corners.

As in they can be hard to bring back up?

[ducatilover]

done... update tommorw.
Fingers crossed, again...:shifty:

[enzo]

As in they can be hard to bring back up?

no not at all very smooth easy to bring back up when in motion. just being a heavier bike than most i find my brakes needing to be applied earlier.

[nzspokes]

Do you have trouble getting tyres? They are 18" I think?

[enzo]

Do you have trouble getting tyres? They are 18" I think?
there wasnt a great deal of choice when i purchased last month. am running dunlop sportmax qualifier which seem to do the trick pretty well. $580 a pair

[enzo]

BADA BING BADA BOOM! gps read 197 max speed which iam more than happy with.
had to back off the throttle as these roads are shit and the wind is a blowin. id expect to get 220kph without to much hassle now.

soooo thanks to all that have helped sort this for me. top marks lads

[ducatilover]

:Punk: Epic win bro. I hear they did 225 ish when new. Not half bad for a naked bike!

[nzspokes]

Wheres the pick of the skid? :Punk:

[enzo]

Wheres the pick of the skid? :Punk:

shit i was hoping you would have forgotten that part