Quick Question - Honda MTX 125

Evening all

My last post on this NG was back in May to say that my Honda MTX 125 and Pug
Speedfight 100 had been nicked. I followed up a coupla days later to say
that the MTX had been found, but was a wreck.

So here I am, 7 months later, trying to see if I can get it back
together....

I've put parts of it back together, just trying to get it started before I
start shelling out on it. The battery's been nicked, loads of wires have
been cut off, it's missing most of the plastics, all the lights, clocks etc.

I'm now trying to start it, but there's no life there at all.

1st Q: Should I be able to start it without a battery (it's obv. kick
start..!)? I know not all bikes need batteries, and the Haynes Book of Lies
talks about the battery being required for ancillaries but nothing else.

2nd Q: Do I need to connect any wires together to simulate the
(non-existent) ignition being in the 'on' position? All the wires bar 2
have been cut off short, leaving a black and a grey, but that doesn't
correlate to anything the Haynes book shows. Also the engine stop swich has
been removed, but I guess that this just means that it won't stop, not that
it won't go?

Apologies for my lack of knowledge, I've kinda been chucked in the deep end
here...!
Ta muchly.
_____________________________xena

Honda MTX125 (stolen/rec)
Peugeot Speedfight 100 (stolen - have you seen it? Reg Y82HGX, black)

____________________________

 

um, sig better now before you start?? ;o)

--
__________________________________________________________

xena

Honda MTX125 (stolen/rec)
Peugeot Speedfight 100 (stolen - have you seen it? Reg Y82HGX, black)
__________________________________________________________

 

You need some mates who know what they're doing to come and help you -
you'll never do it alone by the sounds of your knowledge.

 

ISTBC here, but I'm damn sure my old one wouldn't start without a battery.
It was some time ago though.

--
Catman MIB#14 SKoGA#6 TEAR#4 BOTAFOF#38 Apostle#21 COSOC#3
Tyger, Tyger Burning Bright (Remove rust to reply)
Alfa 116 Giulietta 3.0l (Really) Sprint 1.7 75 2.0 TS
Triumph Speed Triple: Black with extra black bits
www.cuore-sportivo.co.uk

 

I`m assuming it`s 12v, has a flywheel magneto and a CDI pick-up in the
magneto?
Just connect the magneto to the CDI box and that to the coil using the
existing colour coded wires.
Some systems are even easier as the magneto connects to the coil direct.

My suggestion is follow the wiring diagram in the HBOL for just the ignition
system until you get a spark then work out the chargeing system (rectifier
etc.) after.

--
Petel .
02 M2 Buell.
C90-ZZR.
Piaggio/Gilera 125 Red Dwarf Sprinter
http://homepage.ntlworld.com/peteh1/website/index.html

 

xena says...

<snip>

It may be that you need the kill switch wired in to make a connection
for the ignition to work. I know this is the case on some Yamaha and
Kawasaki models.

 

"Lozzo" wrote in message...

Hmm, I was wondering that, but looking at the wiring diagram (here, if
anyone wishes to take a look!
http://www.ukosborne.co.uk/images/mtxwiring.jpg ), it appears that the only
connection is made when the Kill Switch is set to OFF. Therefore, having
both the wires cut off should, I think, just be the same as having it in the
ON position.

I can see me out there tomorrow with the wiring diagram scribbling off the
wires that don't exist anymore!!

Cheers

--
__________________________________________________________

xena

Honda MTX125 (stolen/rec)
Peugeot Speedfight 100 (stolen - have you seen it? Reg Y82HGX, black)
__________________________________________________________

 

12v yes. Flywheel magneto? Not sure about that. Just looked it up on
Google, and I'm guessing that the bikes that are designed to work without
batteries have a flywheel magneto instead of an alternator? Well mine's got
an alternator, so I'm guessing that it's wanting a battery?

Cheers for your help.
--
__________________________________________________________

xena

Honda MTX125 (stolen/rec)
Peugeot Speedfight 100 (stolen - have you seen it? Reg Y82HGX, black)
__________________________________________________________

 

Checked the wiring diagram.

You will need a battery as in your system it supplies the power to the loom
from the ignition switch.
The kill switch is not vital, all it does in this loom is to earth the CDI
unit to stop it sending the "fire" signal to the coil.

The Red is the main power to the ignition switch and is connected in the
"on" position to(BL) the main loom feeding power to the rest of the system.
The Green from the ignition switch connects to the main earth in the loom in
the "off" position.Again this just earths out the CDI when you switch off.

To hot wire this switch just twist the Red and BL (again hard to
see )together thus feeding power to the loom.
To stop the engine just earth the Bl/W wire from the CDI (that`s all the
kill switch does anyway).

Wire the Rect/Reg/CDI as per the diagram and with a good battery and coil
this has bypassed the ignition switch and kill switch and you should get a
spark.

--
Petel .
02 M2 Buell.
C90-ZZR.
Piaggio/Gilera 125 Red Dwarf Sprinter
http://homepage.ntlworld.com/peteh1/website/index.html

 

Ok. The battery prices aren't too bad, I've seen a few on the net for about
11 quid with a further 6 quid for the acid, or I'll see if me local bike
place can do me one. Hopefully get that next week.

I can see that now on the diagram. That's wierd tho cos those wires (Black
and Red) are cut right off short along with the lighting wires etc so I've
got no idea how the scrotes that nicked it managed to start it. I'll have a
look further down the wires to see if they've butchered it further down.

Ok, so have the Red and Black gotta stay twisted whilst I'm riding it, yeh?
And to stop it I can short the Bl/W to the earth to stop the engine whilst
the Red and Black are still twisted together (which would be the same as
operating the kill switch whilst the ignition was in the ON position)? Then
I gotta untwist the Red and Black or it'd be the same as leaving the
ignition on? What would happen if these were left twisted together?

Thanks for this Petel, really feel like I might getting working again yet!

--
__________________________________________________________

xena

Honda MTX125 (stolen/rec)
Peugeot Speedfight 100 (stolen - have you seen it? Reg Y82HGX, black)
__________________________________________________________

 

If you can afford it, get a wiring loom, clocks and lights from a
breakers. The cost in pounds is far less than the cost in grief of
trying to re-wire and putting the loom in is a doddle compared.

DAMHIKIJD, OK.


--
Martin:
"For a minute there, you bored me to death."
VTR1000 Firestorm
TDR250 http://ukrm.net/BIKES/Yamaha/tdr250.html
martin dot smith nine zero three at ntlworld dot com

 

yeh?

Yep, that`s your ignition switched on.

It would`nt help the rec/reg units or the CDI as it`d be the same as leaving
the ignition switched on, also any drain to earth in the system or back
bleed of power from any of the units would flatten the battery in hours/days
depending on the drain.

G`luck.

--
Petel .
02 M2 Buell.
C90-ZZR.
Piaggio/Gilera 125 Red Dwarf Sprinter
http://homepage.ntlworld.com/peteh1/website/index.html