need help roketa bash mc17 150cc engine changed By jlrod09 (Read 6,231 times)

[jlrod09]

OK this is what was happening .

first the ground wires on the frame were literally melting when we tried to turn the scooter on . the engine was a 157qmj 150cc shorty .

so we decided to change the motor . now we have another problem i attached a pic with a description on whats going on any help is greatly appreciated

the site says that this engine is compatible with a wussi 2006 scooter . i looked all over the place and couldnt find a single part or picture of this model

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[jlrod09]

this is the exact engine we bought . also the voltage rectifier are not the same it has one xtra wire .also i dont know what the heck is that small aluminum piece with the single red wire for


.monsterscooterparts.com/154eng.html" rel="nofollow" target="_blank">.monsterscooterparts.com/154eng.html

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[JR]

First of all welcome to the forum. The engine you bought has a 3-phase stator more than likely a 11-pole but it also could be a 12-pole? Either way we can make it all work but you're going to have to do some re-wiring.

First of all I need some information and possibly some pictures to know where to start. You say you have MC-17 and is this your scooter?

.roketa.com/product/2610/0/2624.shtml" rel="nofollow" target="_blank">.roketa.com/product/2610/0/2624.shtml

If not which one? The MC-17 comes in 3 models and the Sicily has a 3 phase stator;

.roketa.com/product/productlist/2610.shtml" rel="nofollow" target="_blank">.roketa.com/product/productlist/2610.shtml

So now here are my questions?

On the old engine what are the wire colors of each wire and how many?
On the old engine what are the wire colors of the recifier (R/R) the original R/R?

Now on your new engine I can see the 3-plug and it has 3 yellows but I can't see the single bullet connector wires so what color is each one of them?

On the new R/R in the picture I can't see the color of the wires so what are they?

Also one last question and it'll depend on if you use the item you listed as not knowing about? Does this scooter have a on/off headlight switch? I know it has a dimmer switch and if that's the only switch on the headlight system then the lights should be on as soon as you start the scooter but if it has a on/off headlight switch and a dimmer switch then you will need the item in the picture you don't know about.

It is a load resistor and is used when you have a on/off headlight switch, it keeps a load on the R/R when the headlights are in the off position. If you don't have a load on the R/R at all times it generally won't last long because it shunts extra non-needed voltage to ground.

On the MC-17 Sicily wiring diagram it seems to show a on/off switch (diagram very unclear) but I don't see a load resistor?

That should just about do it if you can answer those questions we can get started and I'm in and out all day so I'll keep a check on this, have a softball game tonight with my grand daughter and I generally fall asleep in my chair in front of the forum every night!



Again welcome to the forum and hang in there we'll get her going.

JR

[jlrod09]

thanks alot for ur help . im really thankful for the fast reply . i will get back with more info when there is better weather

[jlrod09]

glad tobe a part of scooterprofessor

[jlrod09]

.roketa.com/product/2610/0/2624.shtml" rel="nofollow" target="_blank">.roketa.com/product/2610/0/2624.shtml
tis is my scoot its also known as the roketa bash

[jlrod09]

the reason why we changed the engine was because for some odd reason the rear wheel used to get stuck for no reason , it used to turn on from time time , but the one day it just decided not to turn on . and when i tried to crank it over the ground wires that were on the frame used to want to melt off including the ones going all the way to the starter solenoid .

that is the reason why the engine was changed

[jlrod09]

this is the one right chea yeeea

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[alleyoop]

Nice ride, took the liberty of adding it to your SIG, if you don't want it there just delete the entry in your profile
Alleyoop

[jlrod09]

these are the 2 single wires that come out of the stator on the old engine

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[jlrod09]

connections on new engine stator

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[jlrod09]

rectifier on scooter

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[jlrod09]

scooters oem wiring harness

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[JR]

May 4, 2012 16:23:30 GMT -6 jlrod09 said:

connections on new engine stator

OK after looking at your photo of your old stator it's apparent the old engine had the standard 6 or 8 pole stator and it uses a 4-pin R/R.

The new engine has a 3 phase 11 or 12 coils stator and this is your choices, you can either tear into the old engine and see if the stator is good and put it in the new engine and hook it up as it was or buy a new 8-pole stator and I would get a new 4-pin R/R install it and it'll be plug and play.

You will need to open up the new engine and make sure your old stator will bolt up. Does the new engine bolt right up in place of the old one? Funny they sent you a engine with a 3-phase stator but the Sicily diagram shows this scooter to have just such a stator?


Or here is your other option, first of all you will need to purchase this;

.ebay.com/itm/RECTIFIER-REGULATOR-7-PIN-4pin-3pin-GY6-125cc-150cc-Scooter-ATV-Quad-/280839836509?pt=UK_Motorcycle_Parts&hash=item41635bd35d" rel="nofollow" target="_blank">.ebay.com/itm/RECTIFIER-REGULATOR-7-PIN-4pin-3pin-GY6-125cc-150cc-Scooter-ATV-Quad-/280839836509?pt=UK_Motorcycle_Parts&hash=item41635bd35d

It's a 7-pin R/R for a 11 or 12 pole stator and here is the wiring instructions;




The harness plug that plugs into the old stator that goes to the old 4-pin R/R is useless so you'll need some new wiring and will have to route it to the new R/R and use crimp connectors or male and female spade connector to put it together.

You need to fine the positive side of the auto choke and hook it up to the white wire on the R/R just like in the diagram.

The 3 yellows hook up to the three yellows on the new stator doesn't matter which goes to which.

Green on the stator goes to the green on the R/R

red from the R/R hooks up to the positive post on the battery.

Black on the R/R hooks up to the black on the key switch.

Now in the picture of the new stator wires it looks like;

3 yellows
green
red/black
blue/white or blue/yellow

If this is correct you need to hook up the red/black on the stator side to the old red/black on the scooter that goes to the CDI and the blue/white on the stator side to the red/white again going to the CDI.

You also will have to re=work your head/tail light circuit. This should be a brown or yellow wire that ties in the old harness plug on the yellow wire that plugged into the old 4-pin R/R.

You will now run the head/tail lights off of the battery and to do this you need to get a relay like this;

.ebay.com/itm/12-VOLT-4-PIN-SPDT-AUTOMOTIVE-RELAY-30A-40A-NO-12V-40-AMP-/360455420451?pt=Motors_Car_Truck_Parts_Accessories&hash=item53ecd13a23&vxp=mtr" rel="nofollow" target="_blank">.ebay.com/itm/12-VOLT-4-PIN-SPDT-AUTOMOTIVE-RELAY-30A-40A-NO-12V-40-AMP-/360455420451?pt=Motors_Car_Truck_Parts_Accessories&hash=item53ecd13a23&vxp=mtr

Hook it up like this;



All sounds like a lot of work but in the long run you will be better off with this stronger system and have very good lights, in fact can even upgrade to HID's if you want.

Hope this helps.

JR

[jlrod09]

yes the new engine is the same exact one as the old one it bolted in to place with out any hassel



the engine came with a rectifire and it has the smae number of wires . only thing it isnt split between 2 plugs .can be seen in the second picture i posted

what is R/R