just read all of the thread awsome to see the amount of work been put back in to a 30 i wanna have a go at doin a major rebuild to my nc24 lol

So it's been a few months since I had an update on the project and I have been working away on some weekends.

1) I fixed the awful racket - which turned out to be a dropped shim. Fortunately for me it was just sitting there in the cam cover waiting to be put back in its rightful home.

2) I synched the carbs using a vacuum guage (thanks to Speedy). Re-fitted the carbs, tank, air filter and replaced all the air/fuel hoses.

3) Replaced my reg reg (although working) with a yamaha R6 unit

4) I replaced all the coolent hoses with Samco hoses i'd picked up from here. Flushed the rads with rad flush and replaced all the coolant by the book.

5) I took off all the parts that were ruined by the petrol spill, resprayed and laquered them with petrol resistant laquer and put them back on the bike.

6) Fitted the SS hoses and bled all the brakes and adjusted the chain tension.

So apart from putting the fairing back on the bike you think I would be sorted right? Wrong the bike refuses to start. Since synching the bike it has been on once/twice but in the last month it has never started. I have tried the following:

1) Bought a new battery Varta YTX-BS9 (8ah for more zip on start up)
2) Checked all hoses for blockage
3) Made sure the fuel tap was working
4) Made sure there was fuel in the carbs
5) Made sure there were no shorts in the circuit

Basically I can't figure out what is wrong. I hit the starter it turns over, I get a phut, phut, phut from the exhaust as if it wants to start but it just won't fire .. so where to go next guys?

Have you checked the plugs for spark?
Fuel in the tank? (it does happen!)
Go back to original reg/rec?
And last but not least,kill switch???

I only mention the last one as in the last month I have been called out to 3 motorbikes that wont start, turn up to find that 2 of them had left the kill switch on, the third was a knackered reg/rec. (Eurotunnel Vehicle Recovery)

graham72 wrote:Have you checked the plugs for spark?
Fuel in the tank? (it does happen!)
Go back to original reg/rec?
And last but not least,kill switch???

I only mention the last one as in the last month I have been called out to 3 motorbikes that wont start, turn up to find that 2 of them had left the kill switch on, the third was a knackered reg/rec. (Eurotunnel Vehicle Recovery)

Hi Graham,

Thanks for reply, and yes their is half a tank of fuel and kill switch is set to run I even flicked it on/off to be sure and got a "pop" of unburnt fuel. Will try going back to the old reg/rec and checking the spark. I just find it strange as it had fired up on this setup but only recently started to fail.

I was thinking it might be fuel/air mixture issue?

vacuum hose on the correct spigot?

CMSMJ1 wrote:vacuum hose on the correct spigot?

Hey mate yup it is the one in line with the fuel hose .. I have an feeling that I've actually flooded it as I did leave the fuel tap and choke on for a while. I won't have chance to have another go at it until the weekend.

padawan wrote:I hit the starter it turns over, I get a phut, phut, phut from the exhaust as if it wants to start but it just won't fire .. so where to go next guys?

That is usually a sure sign that it's flooded in my opinion.

You'll be able to tell fairly easily just by taking one of the rear plugs out. New plugs will get it going for sure, but you might be able to bring the old ones back to life by drying them out.

Hi All,

As the keen eyed among you will spot I've not made a post since the 8th July

Ok, so I had lots of stuff going on since then and never got around to the bike. I recently met up with Speedy to have a chin wag about it and return some tools (cheers mate). Anyway, I lost my job back in Dec so have been playing house husband through the winter months and generally trying to find a new job and fortunately I have.

Anyway, to cut a long story short(ish) I'm no longer a slave to the train and will be commuting by car but really want to be on the bike (after all I did buy it to use it and not be a permanent ornament in the front garden).

I got around to looking at it today and essentially the status is unchanged from previous in that it just won't start.

Here's is a list of everything that has been checked and re-checked today:

a) Kill switch is set to run
b) Power is reaching the starter and it is turning over no problems
c) Plenty of power in the batteries (I have two one which is brand new) both kept on accumate to ensure they are charged and ready
d) Fresh fuel is in the tank, fuel tap works and fuel is coming out of the fuel line
e) Vacuum hose is clear and on correct spigot, no kink in the pipe either
f) Spark plugs removed and gaps checked, condition of spark plugs look normal as per Haynes
g) Spark tested from each of the HT leads (all plugs and HT leads operating as expected i.e big fat spark)
h) Choke and idle speed adjuster operational i.e. not sticking or kinked

The bike appears to want to start i.e. when I hit the starter button the solenoid clicks, the starter turns and there is pressure at the exhaust and a phut, phut, phut noise but it just won't run! I've turn the adjuster in an attempt to find the idle spot but no joy.

You may read from earlier posts that I balanced the carbs so I know they are spot on - appreciate it was my mistake to ever move the adjuster but hey ho it should still start?!?!

So chaps can anyone help me? As I need to get it up and running very soon. If I can't get it sorted I'll be forced to sell it off to fund a cheap car but I really don't want to do this given the time and effort I've put it to get this far.

.. and

I forgot to say that I noticed that a little weeping from my oil drain plug. I checked the plug was tight and it appears to just turn (i.e. no resistance) so I think I'm become victim to the dreaded sheared sump threads.

Can anyone tell me what size (diameter and thread) the sump plug is so I can tap it with a helicoil. I'm guessing this is the best thing to do? I've searched the forum I can't find a definitive answer to how best to resolve this issue.