hi my nc30 has bin playin up for awhile now lemi xplain

1st prob electrics the batt is full and works great but everyso often it dies. the volts across at 5000rpm are good (cnt member number checkd awhile ago) but when the bike is runnin hot ie traffic the batt gives up.

2nd possible fuelin issue bike looses its pull higher up in the rev range, this happens more when the bike is hot, the hotter the worse it gets some times even turns to misfireing. ive had the carbs off main jets and emo tubes are clean floats looked like they wer on diff heights ( i cant find a guide to set them right) im runnin 118 all round standard pilot jets 35 i fink 4gt to chek the pilot scews havent drilled the slide or raised the needles i have an aftermarket can ill chek the make in da morin

3rd i tryed balancin da carbs didnt work! the idle has gne crazy hunts up and down too much i cant find the guide to balance them with the drill bit or the light method if ne1 gt a link ( i did search couldnt find it) id really be grateful

4thly most recent when i run outa petrol with the valve on i put it to res but the bike wont take the rest of the petrol from the tank, i took of the valve and the filters are both clean, the other thing i noticed is when i put a vacume on the valve and blow into the breather hole the petrol flows and the bike starts agen


so in summary wierd electrics, messed fuelin ( i fink its runnin rich not sure) out of sync carbs and funky petrol valve

advise, guides, suggestions comments at this point anytin and everytin welcome!!
thanks

You have either a dud reg/rec or generator. This will be causing a lot of your issues.

Apologies, but I didn't bother reading the rest of your post, perhaps try to post in English?!

Cammo wrote:You have either a dud reg/rec or generator. This will be causing a lot of your issues.

Apologies, but I didn't bother reading the rest of your post, perhaps try to post in English?!

And an air leak on the carbs by the sound of it. (probably due to either incorrectly fitted carbs or leaking carb rubbers due to them being cracked and old)

Either that or you have really messed the balancing up...

Oh and blocked breather?

Cammo wrote:
Apologies, but I didn't bother reading the rest of your post, perhaps try to post in English?!

you will be pleased to know we dont charge per letter here unlike a text message so feel free to try again so anyone over the age of 30 can not only read it without a headache, but also not see it as another kiddy chav post

CRM wrote:

Cammo wrote:
Apologies, but I didn't bother reading the rest of your post, perhaps try to post in English?!

you will be pleased to know we dont charge per letter here unlike a text message so feel free to try again so anyone over the age of 30 can not only read it without a headache, but also not see it as another kiddy chav post

I fink my eyes ave startd to bleed after trying to make sens of young'uns slang y'know!

I is going for a lye down wit me biatch, be4 going for a blat on me byke!

Respek!

Cammo wrote: Apologies, but I didn't bother reading the rest of your post, perhaps try to post in English?!

hi sorry about the poor english ill try again here goes...

1st problem is in regards to the electrical system/ charging system, the battary hold a full charge on standing and while the bike is running at 5000rpm the voltage across the terminals is correct i think somewere between 13-14v, but on certain occasions the battary will be dead or die very quick while trying to start the bike. other times it will die when im in traffic or when the bike is hot and not in motion.

2nd problem a bit of an update on this one once the bike is warmed up it runs fine no loss of power, no bogging, no misfires but after the 1st few runs to the redline then back to slow riding the problem occurs where the top end looses pull and the mid range seems to bog getting worse the more i try to push through it
the carbs have got 118 main jets for both the front and back and have 35 for the pilot jets im not sure what the pilot screws are set at and i dnt know the make of the can i have on at the moment when i had the carbs off i wanted to check the float heights but couldnt find a guide to do them, ( im not sure where to measure from or how to adjust them)

3rd when i had the carbs off i tryd to balance them using the drill bit method but it seems to have made it worse (update) it still hunts but only around the 2k mark,the rev meter doesnt move that much any more but you can feel the idle isnt smooth and hear the juddering. i could only find bits and bobs on different threads regarding this method, so some advise on this would be really appreciated.

4th an update on this aswell as im riding the bike coughs and splutters as it does when you need the reserve valve on, but when i turn it on the bike still dies its only when i blow into the breather valve the petrol flows into the inline filter and then the bike starts, i also noticed that the on valve stoped taking petrol when there was still enough inside the tank when i got to the petrol station i could only put in about 7-8ltrs (, i have taken off the filter inside the tank and both of them are clear.)

again advise, guides, suggestions comments at this point anytin and everytin welcome!!

re the reg/rec if im getting the correct volts on the battary terminals does this prove it working or are there more tests needed

re the breather ive blown through it and air goes both ways is this right??

thanks again

voltage sounds ok perhaps a tad low.
one thing i would say is if the battery is an unknown then replace anyway.

with the fueling, what pipe are you running ? lets asume its a standard system, standard air box and filter too. then the 118 allround should be ok. however i would remove the inline filter this could be half the problems right away. or change to a metal gauze type not one of these shit plastic things with some cloth or paper inside. you need a non restrictive filter if your going to use one.

also replace the vacuum pipe to the tap, this must be good solid pipe not some fishtank airline shit that collapses under any kind of suction.

has anyone been mucking around with drilling slides or washers under the needles ? check and put back to factory settings to start with if possible same with the airscrew settings.

another thing, its worth doing for the sake of a few quid, replace the carb rubbers, makes getting carbs on and off a doddle and a thin smear of grease ensures a air tight seal too. that will rule out air leaks.

with regard to the float heights, i know what you mean what to measure, turn the carbs upside down, and measure from the float bowl mating surface to the lowest point on the float (when inverted) and just as it starts to depress the springy needle on the float needle.

hope that helps

re fuel system standard air box and filter i was told that the back 2 cyclinders should be jetted a lil bit higher somethin to do with coolin???
how did you know about my paper inline filter dats comin out asap!!! lol when you say non restrictive does it matter that the pipe seems to run upwards from the tank to the carbs would gravity overcome the suction from the carbs? ill replace the fuel lines and vac pipe as they shouldnt b too much. theres no holes and no needle shims, and ill check the air screws when i get some time to whip off the carbs and set these properly ( i forgot the last time)

carb rubbers is also on my wish list do you know if rick O sells them?

lastly float heights im measurein the distance from the gasket to the bottom (if it was right way up) of the float but i do this with the carbs upside down? and the float just restin on the spring?? and adjustment.. i couldnt see no screws or anything? thanks again sorry for repeatin the q's

Pictures speak a 1000 words.

Float Heights:

Turn the carbs upside down at about 45 degree angle.. just enough upside down so that the floats drop into the bowl.

You'll see the float valve has a springy pin in it.. this shouldn't be pressed in but the float just resting on it.

Measure from where the float bowl sits to the top of the float.

If you need adjusting, bend the metal tab on the float with a screwdriver (only tiny amounts) and measure again

thanks mate i wana get my carbs off today but i got no garage and its rainin outside sooo ill have to play the waiting game lol wen i do it ill try takin some pictures and post them, you neva know mite help some 1 else out

fanx again!