Speedo off after new sprockets
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Speedo off after new sprockets - 8/30/2007 9:59:27 AM
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wicpl
Posts: 5
Joined: 5/29/2007
Status: offline
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I put a new chain and sprockets on my 99 F4. I changed the sprocket sizes. I went from a 45 rear and 16 front to a 47 rear and 15 front. Now my speedo is about 10mph off. What do i need to do to get my speedo to read right? Any help would be great. Thanks !!!!!
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RE: Speedo off after new sprockets - 8/30/2007 10:01:43 AM
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EHonda
Posts: 541
Joined: 6/4/2007
Status: offline
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You need to get a speedo healer. This is always the issue when changing the sprockets. Some people live with it, others get the healer, and adjust the MPH accordingly.
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2005 CBR600f4i Gray/Silver
Yoshimura TRS Slip-On SS/Titanium
Vortex Frame Sliders
Polished rims - 6/30/07
HID 8000K Kit - 9/7/07
ZG Double Bubble - 4/16/08
Hotbodies Smoke Flushmounts - 5/2/08
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RE: Speedo off after new sprockets - 8/30/2007 10:03:53 PM
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travisgarrison
Posts: 129
Joined: 8/1/2007
From: Portland, OR
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EHonda is right. I just installed this, and not only was it easy to install, but when you think about how many "false" miles you are putting on your bike, the speedohealer will definately pay for itself in resale value. If your odometer is just 14% off (which it probably is with the sprockets... i have the same setup), that means when it reads 20,000miles, then the bike actually only has 17,200miles on it and that's easily a 90 dollar difference in sale price.
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Details here:
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RE: Speedo off after new sprockets - 8/31/2007 6:02:08 AM
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woot
Posts: 782
Joined: 7/24/2006
From: NS, Canada
Status: offline
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ditto on travisgarrison.
The install was very easy. I have the EXACT same sprocket setup as you... it's not 10mph it's between 7.5% to 11.5% error - meaning that at 100mph it is off by up to 11.5 mph... if you do 60mph meaning to do 50mph you are actually speeding more than you think you are.
The installation?
- remove the seat
- remove the air duct covers (note that the duct covers have the rubber compression nuts on the inside... be careful not to drop them (like I did) because they're a bitch to dig out of the lower fairing if you're lucky enough to have them drop all the way down and not get stuck around the airbox)
- remove the gas tank bolts. If you have a friend they can hold the tank out of your way - it only takes a couple of minutes.
- take the Honda I cable from speedohealer. Looking from the right hand side of the bike at the back edge of where the gas tank sat - look down and you'll find the honda speedosensor connection. It has the same connectors as the speedohealer Honda I Y-cable.
- unplug the sensor
- plug the male hondaI into the female stock plug
- plug the male stock plug into the hondaI female plug
- route the Honda I cable along the rear-subframe, cable tieing it as you go with the provided zip ties. Make sure you don't overly tighten the zip ties, and also make sure that there is bit of slack to allow things to move.
- put the gas tank back on the bike we're done with that part...
- if you have a friend they can put the duct covers on now.
- finish routing the hondaI cable so that you have a good spot to put the speedohealer. I put mine under the passenger portion of the seat.
- plug the hondaI cable into the speedo healer
----SET UP----
Test that it's plugged in and working - turn the ignition on and the speedohealer should blink a few times.
Figure out your error correction number. I have used 7.5% for now... I think I will end up using 11.5% but have to double check my numbers.
Put all 6 switches in the up position
Turn the ignition on.
Switch meaning:
1 - Test
2 - No Conversion/ covert mph to km/h convert km/h to mph
3 - Negative/positve correction
4 - 10s
5 - 1s
6 - 1/10ths
I wanted a negative (default) correction, I wanted no speed unit (km->miles, miles->km) correction (default)...
so I put all switches DOWN except 5.
I pushed the button 7 times
It blinks 7 times (correct)
I put the 6th switch up AND THEN the 5th switch down (if they are all down it leaves the calibration mode)
I pushed the button 5 times
It blinked 5 times (correct)
So that is good - I have successfully entered a correction of 7.5%. I put all of the switches down to leave calibration mode.
- put the seat on and go for a short ride
- take the seat off, turn the ignition on, push the speedohealer button - it should indicate on the speedometer your top speed... mine was a whopping 60km/h
Cheers,
woot
_____________________________
2000 CBR 600 F4
Full M4,
-1,+2 520,
Speedohealer (-11.4%), AutoCom Pro, Garmin Nuvi 360 GPS/MP3, Cobra FRS/GMRS , Vortex sliders, mirrored windscreen, Cortech bags and Aux Fuse box.
Safety wired and ready to go
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RE: Speedo off after new sprockets - 8/31/2007 6:03:03 AM
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woot
Posts: 782
Joined: 7/24/2006
From: NS, Canada
Status: offline
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Now when I look at my speedometer... guess what? It tells me my real speed an no more math to guess how fast I'm going... sure makes it a lot more comfortable passing a cop car on the highway when you are SURE that you're not really speeding that much
The other cool thing - on the track the speedo gets taped up... at the end of each session you can check your top speed... it doesn't really tell you much but it is kinda cool to legally have your high score in the 200km/h + range ;)
< Message edited by woot -- 8/31/2007 6:05:25 AM >
_____________________________
2000 CBR 600 F4
Full M4,
-1,+2 520,
Speedohealer (-11.4%), AutoCom Pro, Garmin Nuvi 360 GPS/MP3, Cobra FRS/GMRS , Vortex sliders, mirrored windscreen, Cortech bags and Aux Fuse box.
Safety wired and ready to go
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RE: Speedo off after new sprockets - 8/31/2007 6:46:55 AM
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wicpl
Posts: 5
Joined: 5/29/2007
Status: offline
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Thanks For the help and instructions on how to install. I just bought the healer on ebay. Thanks alot Duane,
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RE: Speedo off after new sprockets - 8/31/2007 11:38:55 AM
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woot
Posts: 782
Joined: 7/24/2006
From: NS, Canada
Status: offline
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Duane? err... Dave ;)
_____________________________
2000 CBR 600 F4
Full M4,
-1,+2 520,
Speedohealer (-11.4%), AutoCom Pro, Garmin Nuvi 360 GPS/MP3, Cobra FRS/GMRS , Vortex sliders, mirrored windscreen, Cortech bags and Aux Fuse box.
Safety wired and ready to go
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RE: Speedo off after new sprockets - 9/2/2007 5:05:14 PM
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therabbit
Posts: 476
Joined: 4/26/2007
Status: offline
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If you switch from 16/45 to 15/47 the correction factor is: 0.8976 or I think the speedo healer does it in terms of negative percent which is -10.2%
That's assuming that your stock speedo is correctly calibrated.
With 15/47 you should be doing 60mph in 6th gear at about 5200RPM (+/- 100 rpm) (assuming stock rear wheel size 17-180-55)
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The List of Everything You Ever Need To Know About an F4
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RE: Speedo off after new sprockets - 9/3/2007 10:07:17 AM
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wicpl
Posts: 5
Joined: 5/29/2007
Status: offline
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Thanks Duane,
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RE: Speedo off after new sprockets - 9/3/2007 2:05:25 PM
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terror
Posts: 40
Joined: 6/13/2007
Status: offline
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hey i have the same problem.... i checked ebay and couldnt find a speed healer. where did everyone get theirs? thanks
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RE: Speedo off after new sprockets - 9/18/2007 11:26:27 AM
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woot
Posts: 782
Joined: 7/24/2006
From: NS, Canada
Status: offline
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MORE NOTES - a personal PM that I figured I may as well share with every one else
What you need to do is work out the percent change. On my bike I measured from a friends VFR. That was -7.5%. It is still off from the mile markers. I am changing it to -10.5%. That is NOT bang on GPS accurate but close enough for me. That makes my odometer nearly accurate - not the speedometer... apparently the speedometer is a bit high from the odometer.
I went from 16-45 to 15-47 (-1,+2) on my F4...
16 divided by 45 is .3555555
15 divided by 47 is .319149
.355555 divided by .319149 is 1.11407 or .11407 HIGH or 11.4% higher
So using that math I should enter in my speedohealer 11.4% as a starting number...
To install the speedohealer is pretty easy - if you have a friend to hold up the gas tank it will save you quite a bit of time (you don't actually have to take it ALL the way off then). I think I could do it in 10 minutes now.
If you read the blurb - this is recap -
- remove the seat
- take the covers off the air intake ducts
- lift the tank
(That will take you probably 10 minutes - just finding the right tools and doing it carefully)
Looking from the tail - see the battery, look forward under where the tank was, to the right side - you'll see a 3? pin plug that looks the same as what the speedohealer cable has on it's ends.
Unplug that cable - plug in the speedo healer ends...
(That will take about 5 minutes - it is a matter of find the bitch and that took me longer as I was looking on the left side)
Route the cable along the frame rail - stick the healer box under the passenger seat or where ever you have room.
(That might take 5 minutes)
(Test that it powers on - turn the ignition on - if the red light blinks you are good)
Put it back together - that'll take 5-10 minutes
That's about it - now you have to set the correction factor. To go into setup mode put all of the switches up (IIRC), turn the ignition on, put all BUT the switch you are working on down. When you want to change to a different switch put the other switch up, then put the previous one down... if you put them ALL down it goes out of setup mode - so you'll need to lift the next one before you put this one down.
_____________________________
2000 CBR 600 F4
Full M4,
-1,+2 520,
Speedohealer (-11.4%), AutoCom Pro, Garmin Nuvi 360 GPS/MP3, Cobra FRS/GMRS , Vortex sliders, mirrored windscreen, Cortech bags and Aux Fuse box.
Safety wired and ready to go
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