|
SuzukiSavage.com
/cgi-bin/YaBB.pl General Category >> Rubber Side Down! >> 5 wire tach install? /cgi-bin/YaBB.pl?num=1429405934 Message started by Rylee on 04/18/15 at 18:12:11 |
|
Title: 5 wire tach install? Post by Rylee on 04/18/15 at 18:12:11 So I picked up a tach off eBay that was from a US distributor (still made in China though) and of course it had zero instructions. Was about to pull a pic off Google that gave me an idea of what wire was what. Light has power and ground then there are 3 wires for the tach operation. Green is negative electrode, black is positive electrode and I'm guessing that's + and - on the coil. It's the yellow contacts signal and some models high voltage signal that I'm not sure of? I searched far and wide but either didn't understand what I saw in previous threads or didn't find it. Either way I'm lost and dont want to hook it up wrong and fry it. I'm gonna re visit the threads and see if I just missed the explanation. Any help would be appreciated. |
|
Title: Re: 5 wire tach install? Post by Rylee on 04/18/15 at 22:43:32 Did some more searching and finally figured it out. Tapped the light wires into the vacant horn power. Fed the coil wires up thru the tunnel and got the connected. Grounded everything on an unused factory bolt location left over from the bobber conversion. Everything is all buttoned up and wires heat shrunk and tucked away. May not seem very useful where they are mounted but I wanted a clean triple tree and nothing above the bars. Surprisingly they are both in my extended field of view. To be honest I rarely even look at the speedo unless I see the fuzz and feel I'm going to fast. The tach was more for idle speed and to get an idea of what RPMs I'm at while cruising in specific gears. All I all I'm super happy. 25 bucks for both off eBay. Got them in 2 days and on e I figured out which wire was which took about 30 minutes to install. Took a test run to heat it up and see where my idle speed was and I was sitting at about 1400 RPMs which didn't feel bad without knowledge of the exact rpm. Now I know where it's sitting. Ran the gears out to up to 4500 to see what that felt like and realized when I thought I was pushing each gear I actually had quite a bit to go. |
|
Title: Re: 5 wire tach install? Post by Kris01 on 04/19/15 at 06:33:21 I've been playing with the idea of adding a tach. I know, I know...it's not very useful but I like to watch the needle move! :P How steady is the needle? Being a big single doesn't lend itself to steady tach movement. |
|
Title: Re: 5 wire tach install? Post by Rylee on 04/19/15 at 13:59:01 @Kris01 Ya I've read the nay sayers who say it's a waste of money. It was nice to see that my idle was high when I felt it was normal. And even nicer to see that when I felt I was pushing the RPM limit in a few gears I was barely at. 4k with room to go. For a cheapo tach off eBay it's very responsive. Seems a little slow to drop but that may be due to the 14" or so of wire between the tach and the coil. Not sure if it's like stereo amp power where you have a slight loss of signal power per so much distance of wire. I'm happy and at $25, free shipping to my door in 2 days and a relatively easy install once I figured it out you can't beat it. I did not however use the individual mount brackets so if anyone needs them I'd throw them in an envelope and send them your way. |
|
Title: Re: 5 wire tach install? Post by KennyG on 04/19/15 at 14:55:55 Rylee, I would like to have the mount brackets that you are not going to use. Kenny G |
|
Title: Re: 5 wire tach install? Post by Kris01 on 04/19/15 at 15:06:26 Got a link to the tach? |
|
Title: Re: 5 wire tach install? Post by Rylee on 04/19/15 at 15:35:23 http://pages.ebay.com/link/?nav=item.view&alt=web&id=360998614688 Here's the link for just the tach. I got the speedo tach combo because I wanted the mounting bracket that came with it. The speedo is in kilometers though or I'd swap it for my RYCA tach |
|
Title: Re: 5 wire tach install? Post by Dave on 04/19/15 at 16:46:53 1E5C46444D404D2F0 wrote:
Electricity wouldn't care if the 14 inches was 14 feet on a tach....it requires a tiny amount of current. Most likely the slow return is caused by the mass/inertia in the needle. The needle to return the needle back is pretty light compared to the electric up-swing of the needle. This occurs on most tachs with needles.......higher accuracy is available on digital displays or tachs that have needles that are LED screens. |
|
Title: Re: 5 wire tach install? Post by JutMan on 10/13/15 at 20:32:42 I bought this tach to help monitor my idle speed. Can anyone give any clarification on how to wire it? Mine is wired the same as the one pictured above in the previous post. |
|
Title: Re: 5 wire tach install? Post by Kris01 on 10/14/15 at 20:30:23 Not sure I understand your question. The wiring is posted in the 1st post. |
|
Title: Re: 5 wire tach install? Post by Kris01 on 10/14/15 at 20:59:14 Black - ground for the light Red - power for the light Black - power for gauge Green - ground for gauge Yellow - tach signal. I assume you make a few wraps around the spark plug. |
|
Title: Re: 5 wire tach install? Post by JutMan on 10/15/15 at 19:56:52 714853490A0B3A0 wrote:
The yellow wire was what was stumping me. After looking at how the RYCA one was done, they kind of jammed it up in with the coil wire. |
|
Title: Re: 5 wire tach install? Post by Kris01 on 10/16/15 at 16:59:25 I think most of them you are supposed to strip a few inches off the tach signal wire and wrap it around the spark plug. I guess the same thing could be done by connecting it to the coil. |
|
Title: Re: 5 wire tach install? Post by Dave on 10/17/15 at 04:45:56 7C455E440706370 wrote:
I believe most electronic tachs can use the wrap around the spark plug method, and some of those require a resister if you are going to connect directly to the coil wire. (My Trail Tech Vapor had all kinds of wacko readings without the resistor and would spike the rpm when you used the turn signals, and also had an rpm where the reading would spike and give false readings and trigger the alarms for rpm). Most mechanical tachs (needle swings) require direct connection to the coil wire. Some tachs like the Speedhut are electronic - but have a needle that makes it look like a mechanical tach. It was wired directly into the coil and did not need a resistor. |
|
Title: Re: 5 wire tach install? Post by KNOCKDOLIAN on 10/17/15 at 14:15:28 I believe the SV has a wasted spark system. Not sure how this could be universal if you were to use it on a two coil two pick up system. Make sure your not reading double what it should be. Not sure that reads how its meant too but hopefully you will get my point :-? |
|
Title: Re: 5 wire tach install? Post by JutMan on 10/19/15 at 09:08:23 I believe that the tech here is for a 2 cylinder bike so the waste spark will keep it true to RPM. |
|
Title: Re: 5 wire tach install? Post by Dave on 10/19/15 at 09:53:10 I am not sure why the "spark count" has become so confusing. The Savage and all motorcycles that use the crankshaft to activate a sensor will have a spark every revolution. This allows the engine to be run without a distributor or making the spark sensor use a camshaft driven sensor. On 4 cycle motorcycles one of the sparks will occur in the space between the intake/exhaust stroke and do nothing, the other spark will occur during the space between the compression/power stroke and the spark ignites the fuel. (If it is a 2 stroke bike both sparks will ignite a fuel mixture as every stroke of the piston produces an explosion). Nothing really changes on 2 cylinder bikes - only on a bike with a 360 degree crankshaft can the same sensor and coil be used to power both pistons (the pistons fire 360 degrees apart and both pistons rise and fall together). On bikes with 180 or 270 degree cranks will either be be multiple sensors and coils, and each coil will again see 1 spark per revolution, and one will be wasted......or it will have a crank sensor that can located TDC on the crank and a computer to send the appropriate spark to a correct cylinder at the correct time (modern fuel injected bike....these are the kind of systems a Power Commander can be attached to). On motorcycles that have the points or spark sensor mounted on the camshaft - there will be only one spark per each two revolutions of the crankshaft. On engines with distributors and a single coil.....the number of sparks per revolution is obtained by taking the number of cylinders on a 2 cycle engine - or by dividing by 2 for a 4 cycle engine. All you really have to know is to set your tach to "1 spark per revolution" for the Savage....and most other engines that don't use a distributor. |
|
Title: Re: 5 wire tach install? Post by KNOCKDOLIAN on 10/19/15 at 11:07:16 457E7364757962647F777A65160 wrote:
That's the point I was making. The rev counter says universal. So unless you can set it for 1 or 2 sparks per revolution its not for all motorcycles is it ? |
|
Title: Re: 5 wire tach install? Post by Dave on 10/19/15 at 12:47:49 6170647D7B310 wrote:
That's the point I was making. The rev counter says universal. So unless you can set it for 1 or 2 sparks per revolution its not for all motorcycles is it ?[/quote] Where are you getting 2 sparks per revolution? For almost every bike the coil will fire once per revolution if the trigger is on the crankshaft, and once every two revolutions if the trigger is on the crankshaft. Most multi cylinder bikes will have a separate coil for each cylinder.....so you are only going to connect the tach to one of the coils. |
|
Title: Re: 5 wire tach install? Post by KNOCKDOLIAN on 10/19/15 at 13:29:03 Yep your right. Im not explaining myself. If a rev counter is designed for a bike that sparks once every two revs ie cam trigger and you put it on a crank triggered bike. one spark every rev it will read twice the speed ? The point I was making was that the rev counter is universal ? That's it. I use a strobe light with tacko on to check my tick over. because its designed to flash every two revs it reads twice the reading when on the bike I know what I mean !! |
|
Title: Re: 5 wire tach install? Post by thumperclone on 10/19/15 at 14:30:03 our bikes have a "wasted" spark 1 rev 1 spark, 1 cycle (4 strokes) 2 sparks = 2 rev |
|
Title: Re: 5 wire tach install? Post by TlNEMpU on 06/25/17 at 16:21:09 65273D3F363B36540 wrote:
Ok, I have a similar Tach that I bought off ebay. I'm not super mechanical but I have pulled of the tank and everything. Problem is that I still don't understand how to wire the 5 wire tach. I have a test light that I clamped to a neg on the bike and when I touch either of the posts on the coil it stays on which I thought would be off and then should flash when I push the starter. I guess I need the dummies guide version of what to hook the wires to because I hear a lot about hooking up to the neg or pos side of the coil but I'm either not doing it correctly or not understanding. |
|
Title: Re: 5 wire tach install? Post by TlNEMpU on 06/25/17 at 16:46:37 The part I'm not understanding is mostly the coil part. I have wired lights and stuff before so I understand the pos neg leads for power. If I understand correctly, there are basically 2 pos wires, 2 neg woes, and then signal which goes somewhere. Maybe my test lamp test was done incorrectly (maybe the place I was attaching to for signal was correct but it's supposed to receive power)??? Any help would be great because I would like to put this back together and ride soon :) |
|
Title: Re: 5 wire tach install? Post by justin_o_guy2 on 06/26/17 at 09:26:09 Ran the gears out to up to 4500 to see what that felt like and realized when I thought I was pushing each gear I actually had quite a bit to go. I'm guessing you've been shifting when you feel the torque fall off. That's a good shift point for fun and MPG and keeping your engine happy. The sound of my engine changes once it gets into the higher RPM. I don't really dig it.. I can't hear that once I hit fourth, but the first three gears, once it's a bit past the good acceleration it starts sounding like there is some kinda valve related racket. Long life, performance and economy aren't found up around red line. And drag at speed keeps the engine from getting there in higher gear. My take on it, and Gurus may tell me I'm wrong, so, I'll be following. |
|
SuzukiSavage.com » Powered by YaBB 2.2! YaBB © 2000-2007. All Rights Reserved. |