Nc35 issues

[makz2008]

thanks for the advice
I will probably try getting this done this week if possible, and report my findings
i appreciate the help guys :)

[makz2008]

wow didn't realise how long I had put this off for!
I checked the timing marks and all line up perfectly
checked all plugs are sparking
fresh fuel
was using a fresh battery

so im back to square one.
Im not sure if the 30/35 carbs are compatible between models, but I even tried starting it with my 30 carbs and tank (because the 30 runs) still nothing. I tried the other way round as well to see if the 35 carbs were good, but then the 30 didn't start either? once the 30 carbs were back on it fired up straight away. So why didnt the 35 start using the 30 carbs?

I am soo confused with this bike, I am very tempted to just break it...
unfortunately i didnt check properly when buying the bike and the seller gave me a nc35 with a 18" rear wheel so not really worth much breaking it either

[CMSMJ1]

Did you fit new plugs or not? Get known good plugs in it and go from there.... It is always plugs*




*well, nearly always

[makz2008]

the plugs seem good and are firing so i didn't change them, ill try using the set off the 30 to see if they work and order another set too. I really doubt its going to do the job but if it does I will be over the moon!

[dobbslc]

Is it possible the feed to the coils is reversed? Or the plug caps are on the wrong cylinders? I know the fronts won't reach the rears but could they be on the wrong way somehow?
It sounds just like an in line 4 engine when the coils or plug caps get mixed up.
Worth a check.
The big bangs could be the plugs firing on the intake stroke with the cylinders full of fuel.

[makz2008]

Is it possible the feed to the coils is reversed? Or the plug caps are on the wrong cylinders? I know the fronts won't reach the rears but could they be on the wrong way somehow?
It sounds just like an in line 4 engine when the coils or plug caps get mixed up.
Worth a check.
The big bangs could be the plugs firing on the intake stroke with the cylinders full of fuel.

I doubt it tbh because the plug leads are specific measures so i don't think they will reach the wrong spark plug hole but its definitely worth a check i guess?

are the carbs compatible between 30 and 35s?

Yes. I and many other use rvf carbs on nc30's.

You need to use the rvf throttle pull cable - not sure about the push cable because I never use one. You may also need the rvf carb rubbers (different to vfr), I've always used them. That's it, everything else (airbox etc) transfers over.

so then I wonder why the rvf didn't start with the vfr carbs on? (the vfr starts fine with its own carbs :s
and the vfr didn't want to start with the rvf carbs on? from this I am assuming the rvf carbs are no good but I know the vfr ones are good because the vfr runs fine with them on?

[Neosophist]

Is it possible the feed to the coils is reversed? Or the plug caps are on the wrong cylinders? I know the fronts won't reach the rears but could they be on the wrong way somehow?
It sounds just like an in line 4 engine when the coils or plug caps get mixed up.
Worth a check.
The big bangs could be the plugs firing on the intake stroke with the cylinders full of fuel.

I doubt it tbh because the plug leads are specific measures so i don't think they will reach the wrong spark plug hole but its definitely worth a check i guess?

are the carbs compatible between 30 and 35s?

Yes. I and many other use rvf carbs on nc30's.

You need to use the rvf throttle pull cable - not sure about the push cable because I never use one. You may also need the rvf carb rubbers (different to vfr), I've always used them. That's it, everything else (airbox etc) transfers over.

so then I wonder why the rvf didn't start with the vfr carbs on? (the vfr starts fine with its own carbs :s
and the vfr didn't want to start with the rvf carbs on? from this I am assuming the rvf carbs are no good but I know the vfr ones are good because the vfr runs fine with them on?

intereting.. maybe you didnt give it enough time to get fuel into them?

Since oyu have a bit of time and a good runnign bike.

NC30 plugs into the RVF
NC30 carbs onto the RVF
NC30 battery onto the RVF

It shoudl start.

If it doesnt then somethings up.

usually alwyas plugs / carbs / battery causing starting issues.

noone local can help you checck it over?

[makz2008]

intereting.. maybe you didnt give it enough time to get fuel into them?

Since oyu have a bit of time and a good runnign bike.

NC30 plugs into the RVF
NC30 carbs onto the RVF
NC30 battery onto the RVF

It shoudl start.

If it doesnt then somethings up.

usually alwyas plugs / carbs / battery causing starting issues.

noone local can help you checck it over?

I think that there was enough time for the fuel to get through and there was the usual amount of excess fuel leaked when i disconnected the fuel line from the tap. I really wish I had enough time to devote to sort this out

I will give it a try with the nc30 plugs and carbs again, I was using a heavy duty jump pack when trying to start the rvf, but i will try with the nc30 battery aswell. My final attempt idea was to fit everything back together and try maybe bump starting it but ive been advised that bumping is not healthy for the spark plugs

I don't know anyone from the forum tbh, the only local people i know who have experience with these bikes are also confused by the situation and they've come and seen the bike.

the other thing that is confusing is that the previous owner said he had it running about 6-8 months before i bought it off him, he said he just cleaned the carbs out and it fired up. as far as i am aware he is a reputable member of the forum so i have reason to believe him. but at the same time I don't want to go about spending a lot of monies getting the carbs serviced if they aren't the problem. (carbs are far too fiddly for my clumsy hands)

that being said i will try your suggestion possibly on friday and report back...

[Cammo]

As other have said, what you're describing sounds typical of fouled plugs.