Bike cuts out still ! After replacing about everything !

[JacPowell]

Hi there, I was just wondering if anyone could help me, I have a 2004 Rieju MRX 50, its got a minarelli AM6 engine in it the same as the aprillia rs 50 so im hoping someone will know what im on about ! Anyway its had a 70cc cylinder kit put on it and i took it to a bloke after a few weeks of buying it because it would randomly just bog down for no reason he said it was the head gasket so i got him too do the head gasket jumped on it took it for a spin and it still bogged down so he kept it too have a look and said its your carb pulling in air through the choke inlet on the carb as the choke was removed so i bought a choke lever and plunger set and he fit it started up first kick no problem took it for a spin and it still bogged down so he said the only other thing it can be is the exhaust (original, rusty, crap) so i bought a fancy new sports exhaust and de-ristricted it and put that on myself took it for a spin it didnt cut out so i went for a long ride and bam it cut out again ! so another friend recommended a new unrestricted CDI unit so i bought one put it on and it still cuts out, i took it back too the bloke he stripped by carb down for the 4th time and he said the jet needs too be higher but after he stripped it it ran like a beauty for 2 days pulling cleanly, and then on the 3rd day of loving my bike not having to be on the side of the road kicking the damn thing over it cut out on me so after all this money spent i still have a bike that cuts out, im just not sure weather to change the jet or buy a bigger carb id prefer too do the jet but what would it be upgraded to ? Its a Dellorto PHBN12 HS Carburettor and its currently jetted to 72 but that was before the exhaust and CDI and have been told it will need to go up anyway because of the exhaust and CDI. Sorry for this rather long boring post but im hoping somebody will take there time too read this and offer some advice and if that person is you, thankyou very much it is highly appreciated.

[Damon]

My friend had a similar prolem. It was his electrical system not working properly. A new HT lead, coil, plug and alternator later and it worked fine.

Start simple and check your plug. what does the tip it look like?

[JacPowell]

Plugs fine not too rich or too lean, theres a nice blue spark coming from it too.

[JacPowell]

Just been too have a look and now it wont even go to high revs theres now a sort of deep loud throaty noise from the exhaust. Thanks

[finpos]

the problem is clearly that you have a shit mechanic and a trusting nature.

f.

[TUG]

Didn't someone off here have running problems down to the side stand kill switch cutting the bike out?
____________________
Haz ER-5, innit!

[JacPowell]

Hi there, thanks for your reply but i have already checked for kill switches and there are none.

[TUG]

Suicide stand?
Ah well, are you sure the plug is a tanned brown?
____________________
Haz ER-5, innit!

[JacPowell]

Yes the plug is tanned brown, i was thinking it may be the stator but it cant be as it ran fine for 2 days. Im so confused and frustrated ! :S

[TUG]

I don't know what to suggest, Battery terminals are tight? your earth is tight on the engine/frame?
____________________
Haz ER-5, innit!

[JacPowell]

It doesnt have a battery it has a generator and the CDI earth is secure as i only just fit it the other day. Thanks

[Nemo]

It will have a battery, all the generator does is create the spark, the battery runs all the lights and what not, there isn't a vehicle on the road without a battery, it needs it to work
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Previously owned: Kawasaki KH125, Suzuki GP125, Suzuki GX 125, Honda CB125 TDC '83, Honda ntv 600, Kawasaki ER5, Kawasaki ZZR600, Aprilia RSV 1000 Mille
Now own: Ducati 848 evo

[cloric_tzr]

[JacPowell]

Quoting from the manual, ' There are a number of coils in the Generator one produces A.C. volts to power the lights,horn and indicators. The other coil is responsible for picking up a signal to provide the spark for the ignition system.'

[Nemo]

huh, never heard of that before, I stand corrected...maybe it's a problem with the generator then?
____________________
Previously owned: Kawasaki KH125, Suzuki GP125, Suzuki GX 125, Honda CB125 TDC '83, Honda ntv 600, Kawasaki ER5, Kawasaki ZZR600, Aprilia RSV 1000 Mille
Now own: Ducati 848 evo

[JacPowell]

I was thinking that but would it run fine for 2 days with a dodgy generator ?

[Nemo]

Hmmm wouldn't have anything to do with the revs I spose, I take it you've checked the fuel pipe make sure it's not blocked anywhere, oil pump maybe but I can't see it being that, could be the timing?? That has something to do with the generator
____________________
Previously owned: Kawasaki KH125, Suzuki GP125, Suzuki GX 125, Honda CB125 TDC '83, Honda ntv 600, Kawasaki ER5, Kawasaki ZZR600, Aprilia RSV 1000 Mille
Now own: Ducati 848 evo

[JacPowell]

Iv just updated the fuel line and re-routed it so there are no kinks, and its running pre-mix so it isnt the oil pump. And the timing is in the CDI box which i have just replaced also.

[Damon]

I would try the HT lead and plug as said earlier. It may be sparking ok but it all changes at higher revs and under load.

And sack your mechanic too.

[Nemo]

so the generator creates the volt then sends it to the CDI? Sorry I'm not much help but I've only dealt with classic and more 'simple' bikes, can you plonk the cdi straight in without having to adjust anything then?
____________________
Previously owned: Kawasaki KH125, Suzuki GP125, Suzuki GX 125, Honda CB125 TDC '83, Honda ntv 600, Kawasaki ER5, Kawasaki ZZR600, Aprilia RSV 1000 Mille
Now own: Ducati 848 evo

[JacPowell]

Cheers guys, the plan is to get a new generator and try that and if not a new ht lead and cap. If all that fails who knows what ill do with it.

[Nemo]

Try the HT leads and plug first, as it's the cheapest option, if it's not that then your safe in the knowledge you won't have to do it for a while, how much money have you spent on it so far?
____________________
Previously owned: Kawasaki KH125, Suzuki GP125, Suzuki GX 125, Honda CB125 TDC '83, Honda ntv 600, Kawasaki ER5, Kawasaki ZZR600, Aprilia RSV 1000 Mille
Now own: Ducati 848 evo

[pepperami]

have you thought about the plug-cap? as some have a resistor in them? and that can break down and cause a few sparking problems, it may only show itself at higher revs or when the engine is fully warm and been running for a while?

the exact same is true of coils


just an idea
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I am the sum total of my own existence, what went before makes me who I am now!

[JacPowell]

Bike cost £400
MOT £30
Tax £15
New Chain and Sprockets £ 50
New indicator lights £25
New exhaust £180
New CDI £40
New Brake pads £15
New Spark plugs £20
New Head gasket £10
Choke assembly £15
New Speedo cable and Drive £50
Labour £140
Flywheel puller tool £15
Toolbox £50
Petrol £40
Insurance £300
Which comes to a grand total of £1395 for a 2004 bike with about 2000 miles on it, which as it stands cant even get me too the shops and back.

[JacPowell]