New CF Moto V5 in the garage By automotoguy (Read 5,247 times)

[automotoguy]

I am hoping someone can shed some light on my problem, I just purchased a used 2006 CF Moto V5 with 2230 miles on it from World of Wheels dealership here in Marietta, GA today. As I rode home all seemed well until the bike suddenly cut out in traffic. I got off the road and noticed that it seemed the starter button was un-responsive when pressed even though the lights and all were still on. I then discovered that the temperate gauge had never left the C mark in the whole 18 miles ridden so far. After about 10 minute the bike starts at the first push of the button and I am off and running only to have the same thing happen 6 miles down the road. Again I had no response on the start button and had to wait about 5 minutes or so. Never once has the radiator fan kicked on or the temp gauge registered anything but just below the C mark like it does when you start it cold. I see the sensor on the head on the thermostat body and the one on the bottom of the radiator but kinda clueless as where to start. Should I replace them both?

Which controls the gauge and fan, or if one gauge one fails does it keep the fan switch from working. Otherwise I am loving this bike, its SWEET!!!!! I'll post some pictures tomorrow.

[makarov]

The first thing to do is check the coolant level.
If it is too low there is not enough coolant to make the temp Gage shown anything.
.

[automotoguy]

makarov - that was my first thought. I check the coolant level and its fine (not easy to check though). radiator, hoses and thermostat housing are getting hot.

I am very new to these 244cc engines.

[kz1000st]

Get in touch with Cookees (HPS Motorsports). I almost bought one and he noted they had overheating problems. It sounds like your thermostat is stuck or it has an air bubble in the system.

[automotoguy]

I know the thermostat is opening because the hose and radiator get physically hot to the touch, but I think whatever electrical part responsible for operating the gauge and fan is dead. I just don't know which of the two sensors works which? I just ordered both from scrappydog scooters. I guess I just replace them both and refill this system later this week when I get the parts.

[richardthescooter2]

I have a mc-54-250b roketa scooter, one summer it would act like that, I go 5miles and shut off, go another 5 miles shut off (though my button work) it would only do this in warms temp, turn out to be a bad ignition coil.

[automotoguy]

Just a few quick tests I have done troubleshooting this problem found in various places online. I looped the two connectors on the radiator fan switch together and the fan came on and runs fine. I rode the bike for 15 miles and no stalls / shut downs when the fan is running constant.

I used a piece of wire and grounded the signal green wire connected to the thermostat body to the frame of the bike and the gauge went to past its hottest mark as expected. I ordered both the fan switch and thermostat housing switch so I will swap them later this week when I get them but I don't understand how they could both be bad at once.

[go4it]

I have an '06 V5 in my garage as well. To my knowledge there is nothing in the cooling system that will stop the motor from running even if it were over heating. From what you are saying there was no indication you were over heating just that your temp gauge is not working. But I am guessing this is unrelated to why the motor is shutting down. I am guessing you have ether a bad coil or a (oh crap I can't think of the name of the part). I think it's called a rectifier. In any case when they go bad they fail when hot. So the bike runs perfect for a while till the engine get hot then it shorts and the engine kills. Let it cool and it restarts and so on.

Here's a link to the V5 maintance manual also a like to a site with a lot of V5 owners.
www.alternativecruisers.com/index.php?action=tpmod;dl=item32
www.alternativecruisers.com/index.php?board=60.0

Good Luck,

Bob

EDIT: After you download the manual start looking at page #200 you may find some good info there. You should also consider the CDI as well. As I said above when certain electrical parts get hot they will open if falty. I am betting this is your problem. BTW, did you contact the place where you bought it? They should make the repair for you if you just bought it.

[Bashan]

Another thing to check is the vapor canister. They are infamous for getting clogged up. If the bike has EVER been down, even gently, then the canister is probably full of gas. This shuts off the vent to the gas tank so it buils up a vacuum=no gas to the carb. I've worked on a V5 and that's exactly what was wrong with his bike. My CF250T has about the same engine as your bike and I took the canister off immediately upon delivery to prevent and problems of that sort. Here's the POS before extraction:

You've got to isolate and plug any lines that are open after the surgery. Don't leave the check valve on there, it's usually part of the problem. That's the vent line that runs to the gas tank:

Here's a link to a page on a thread that deals with this problem. Scroll down about halfway and you'll see it.

[automotoguy]

Thanks for all the information, I am going to read through it all now. You all are awesome!

[automotoguy]

Here is a picture of the bike!

Attachments:

[automotoguy]

So I played with it a little more this afternoon and with all the plastics off I realize the radiator fan is kicking on and off just a quiet little devil. So I assume the sending unit one has failed and I'll replace as soon as I get it in the next few days.

There was no gas in the canister, but I will keep that in mind incase I ever drop the bike.

Now my next question is this, if the coil is causing those shut downs I have a performance coil I bought for a previous gy6 150 scooter that looks identical to this one and from what I am reading all the GY6 engines use the same coil, is this true? If so I'll install this one on it tomorrow before I put it all back together and hope the stalling problem is fixed to.