starting question

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agreat1

agreat1

Joined
Oct 31, 2007
Messages
681
Location
cumbria
Hi Guys n Gals
I;ve put me Akras on and bike is struggling to start a little. Every start goes like this
start once no fire
start second time no fire
start third time back fire then starts

i know she needs to go on map 2, that happening tomorrow, but do co2's need adjusted again?
other Mille's and Tuonos round here all start first time

One more thing, before i put on the Akras, she could take a couple of attempts to start, but not always, also she never back fired when she did start

i've been keeping the revs down so as not to damage her till i get map2 doe..

is there anything else it could be??????????
 
Hi
Got Leo-Vinci's on mine, and set to map 2..Starts first touch everytime, but accasionally get a backfire on start up..(didn't do this with standard cans) but have had them on for 13k with no problems.
Mines not had any other mods, such as power commander, airbox etc..
 
When you get MAP2 ebabled by the dealer, they will need to reset CO2 levels. Make sure they do this. Also ask them to make sure they download the latest MAP using Axone. Hopefully this should cure your starting problem
 
ok guys i'm beggining to think this is a fuelling problem
i've started running out of petrol, when i know i have some in the tank..
when shes out of petrol she just turns over and over, although she doesn't fire, she also doesn't stop trying
when i fill her with fuel, i get the usual turn turn stop(with finer still depressed on starter)

so i'm thinking blockage somewere!!!

how do the fuel lines sit in the tank?
whats te best cleaning method?
should i buy some of that stuff you put in your fuel?
could it be the fuel pump or filter?

after 3 or so attempts she starts and runs well, so i'm a bit confused
 
i get the usual turn turn stop(with finer still depressed on starter)

this can't be a fuel problem, has to be electrical
 
Agreat1 you may have either a loose or damaged pipe in the tank where it meets the fuel pump.

Aprilia announced a bulletin regarding the wrong size clamp being used on the pipe

The symptoms are the bike runs fine till the tank gets below 1/3 and then you lose some fuel pressure as the pin hole get exposed.

If you measure with a guage there is about 25 odd psi depending on how big a leak when this happens and not the 48 psi it should have.

Worth a look.

The fuel pump can go bad when hot as well. You really need to check the pressure in the fault state to be sure. The high pressure line pre regulator should be about 65 psi.

pipe number 1 in pic is dodgy one. Someone off Rsvr.net had problems solved by new pipes in tank fitted by aprilia themselves after dealer couldn't sort it. Hole so small couldn't be seen with eye.

table_38-78.jpg
 
Sounds electrical to me, if it was a fuelling issue to the extent it caused problems with the starter turning over the engine then chances are you may have caused mechanical damage to the engine.

Could be a lazy starter/relay or perhaps just a poor electrical connection in the starter circuit.
 
As above, he clearly states that when the fault occurs it stops cranking even though his finger is on the button. cannot be a fuel problem, unless there is that much fuel going in the cylinders that they are hydraulicking, then the only way to sort would be to remove plug and drain petrol from cylinder, and he hasn't mentioned doing that. if symptoms are as stated, definitely an electrical problem, what about a dodgy clutch lever switch cutting the starter, or gearbox switch so it thinks it's in gear.
 
It could be electrical but consider the last post made by A great1.

Starts eventually full tank. with a few pushes on the starter

No start low tank and bike runs out of fuel well before tank empty


If it's electrical there are few common links in there ?

I'm just throwing out an idea here -

consider there is a knock sensor in the engine. There to stop a backfire destroying the sprag. Dodgy fuel delivery = Backfire = Knock sensor shutting down starter hence why starter stops despite finger on button.

It could even be a dodgy switch on the bars but non of that fits with bike running out of fuel before it should. :dunno
 
spoonz what you said sounds about right
wen out of fuel it will turn over for ever
with fuel in it will turn over then stop
now i know not to turn over for ever as it damages the sprag - but that option is taken away fro me..trust me i picked her up today from aprilia dealer and they looked in shock as it took 4 goes to start her, each time time the pump re-primes
i'm thinking vacuum or leakage or pressure in the tank....
but i'm a network genius, i can fix all your pc/network problems, but bikes i just fettle and try my best
i know there is a problem somewhere, i'm sure its fuel

as for starter - i have a nre yam solenoid on the bike and regulater has passed all tests
second new battery after first was possibly defect... dealer been spot on to help, but i think hes now stuck too......
i just want ny gorgeous baby to start

i have no expert garage so is there anything i can do to check the pipes, fuel pump etc
 
Well you could go around in circles forever so you need to start eliminating things.

The tank comes apart quite easy so you could check the pipes inside and maybe replace the one i mentioned. Make sure the pipe you use is ok submerged in fuel.

Or if you have access to a pressure tester measure the fuel pressure when tank is low. There is a filter to check in there too.

It will cost very little to do those and at least it's eliminated then. The tank should pretty much run dry as the pickup is very low in the bottom so something there doesn't add up.


IT - Me too these days for my sins.
 
cheers spoonz i will try that tomorrow....
if a breather pipe is blocked, would that stop fuel from emptying fully
 
A blocked breather normally manifests itself as pressure buildup in the tank and a big rush of air when you open the filler.

It might affect fuel flow yes but generally i would think not just on a low tank.
 

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