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Hi Edd;

I have left the cables a little more slack that usual to eliminate any more forces. Remember the servo motor only sounds bad once the bike has warmed up. once she is startable I will make another vid of the PV's to show you.

A formula one engineer on 3ma's, I think you will get many customers!

Ok, I can report back some interesting stuff, confirmed by a lot of testing. (other servo has had its life so testing done with original servo)

The servo was sounding very smooth as seen in the vids. I warmed it up and straight afterwards turned it on and off and on and off, and same problem hardly turns and turns very slowly(sounds like it is under a lot of load and straining). I then went to get the camera and what do you know it is almost back to normal again????, and only after 30 seconds. I filmed it anyway. I then went for another ride and same thing hardly turns and sounds like it is struggling a lot. quickly went inside and got the camera and it had already started turning more freely.

I cannot understand why after such a short period of time the servo can get back to normal.

This video is taken about 30 seconds after the bike was running. You can hear it is slightly worse than when cold but still no where near as bad straight after the bike is running. When I am riding, it often doesn't turn at all which I can feel because I get stuck at 6000-7000rpm because the pv is open.

http://youtu.be/z-zLMyCzwt4


And just something to add. I stopped at a robot and the battery had lost almost all its charge, the neutral light and flickers were very dim. I then stopped, loosened my PV cables because I was certain the PV was draining all the battery charge and drove a few km's and back to normal neutral light was bright and flickers too. Maybe the servo is faulty after all.

Any advice or opinions welcomed as usual

I would sort the battery first.
Otherwise it's spanner time.

That favour I asked for. I'm going to leave it until June if that's okay with you. I had a call today and it's all about to happen again later this month. Thanks n

No problem Ndwedwe, what ever suits you, I am easy.

The battery was sorted, but the servo unsorted it

Hi Luke,

Interesting story you tell.

If I'm right, you could try to connect your 3ma3 cdi to your bike (with a 3ma3 cdi on a 3ma1 the engine wont run)
But when its connected it should do his cleaning cycles.
So you can test (or be more sure) if it is the pv who is faulty or perhaps the cdi.

Just a idea for you to try.

Thanks for the idea Louis.

The only problem is that the PV is faulty when warm. I would have to go for a ride come back and take the tank off and all the connections and connect the 3ma3 cdi in under 30 seconds. I should employ 3ma formulae one mechanic Edd to do it for me .

Ok, the switching in 30 sec could be a problem

Do I see it right on the short movie, do you don't use your tps sensor?
Or did not connect it for the movie!
The engine will behave different when its not connected.

disconnected it for the video so you can clearly see the disc rotating, otherwise it is normally connected.

its easy to find a replacement servo isnt it? and very cheap too!

its easy to find a replacement servo isnt it? and very cheap too!

I think maybe I should take it easy on the top end for now and just try a different servo then.

Edd; how much do you want for your servo, You said you had one spare right.

Hi Luke will have a look over the weekend and send you a pm. I might have two if memory served me right.

Edd

Cool thanks Edd

Ok some more info to add, and without even going for a ride!

I walked into the garage and turned on the bike. the neutral light, flickers, main light etc were almost not working because the voltage was so low (I assume).

I then started the bike and the lights and PV worked???? all the lights were bright and the temp guage was starting to rise 'normally' I warmed it up some more and then the temperature gauge started rising and falling rapidly???? almost like it was shorting and not and then shorting again.

So maybe there is a short somewhere or a component is faulty. I then disconnected the pv completely to make sure it wasn't the servo but same thing.

I actually have no clue what to do?

any suggestions?

I am sorry but you have to eliminate your biggest issue. And that means a new fresh battery.
My 3xv started pissing me about. Took the battery out the Honda. All 100% again. Put the 3xv battery in the Honda. You guessed. No problem. Yamaha is sensitive to shitty batteries. End of story.

I think we can assume the battery is fine after all I bought it new a few months ago for my 3ma and got it charged just the other day before my first start. Unless the battery is faulty if there is such a thing?

Ok that part of the problem is now solved. the thermostat wire that was soldered on had come loose and was touching the cylinder causing all the current to drain out of the battery and when the bike was running the wire was intermittently touching the head causing the temp guage to jump around.

But the servo problem still prevails

Anyone got a spare thermostat lying around?

Hi Luke;

Got a pv motor out of the attick but like I said the wires were cut some people do not have too much marabarab (xhosa for how intelligent you are). Well hopefully it is still working will try and post it tomorrow just pm me your details. You just need to cover the postage. will pm my details.

Edd

I cant thank you enough Edd, I appreciate it. I have sent you a pm.

Been a while now, but never the less I have put in a different PV servo and the bike seems to be running much better. the servo turns correctly and doesn't seem to be under much load, So I think the servo has solved the problem .

As you said louis the bike needs to be ridden in first gear up to red line and then all the way down and back up again before she pulls properly. even If I cruise at 3-6000 rpm for 20 seconds I need to do as I mentioned above to get her pulling properly. But besides that there are no lean spots and plugs look great!

I will be collecting my crank equaliser valve from Yamaha this week so hopefully that will make a difference.

Hi Luke,

Good that you have solved the pv-motor problem

I will be collecting my crank equaliser valve from Yamaha this week so hopefully that will make a difference.

Don't expect to much from it. What you experience is a typical 3ma problem.

What is your carb setup?
The trick is to lean it out on bottom rpm (as much as you can, but stay on the save site)
and play with the throttle ones you start filling the crank casses.

The variable air jet system is not that bad, it helps leaning out low rpm.
You can use it.
One of the air jet is only opening in low rpm's that is the one you need to be using.
The other one is opening on high rpm's to, and that you don't wand.


You will love and hate the 3ma when you start working on the carbs