NC30 carby jetting - DIY guide

[CMSMJ1]

Ty Cammo for your reply.

I have just got an NC35 with a titanium exhaust and the airbox completely removed for racing. I am unsure of the current jets.

Track conditions where I live mean that the airbox will have to be refitted, so I am going to fit the filter half back on, do you think I will have to go down a few sizes from this slight restriction?

All testing will be done on the track without a dyno.

I am also unsure of any engine mods at this time.

I run an NC30 with RVF carbs, no airbox lid, but filter plate. I use 130 man jets...

[callboy]

Wow 130s?

I didn't think that they would be that big! I will pull the carby out and have a look at what is in there.

I am not really chasing big top end horsepower as I will be running the bike on a very small and tight track, so more midrange will be the key, so I assume I won't have to go that high.

Any reason why you only have the one size front and back (I am assuming you mean 130s all round)?

TY for your reply.

[Cammo]

I have just got an NC35 with a titanium exhaust and the airbox completely removed for racing. I am unsure of the current jets.

I am going to fit the filter half back on, do you think I will have to go down a few sizes from this slight restriction?

The rvf carbs will need around 150 sized jets to run properly with no airbox/filter.

So yes, you will need to go down a few sizes!!

[Cammo]

I am not really chasing big top end horsepower as I will be running the bike on a very small and tight track, so more midrange will be the key, so I assume I won't have to go that high.

If you rev the bike at all over 10,000 revs you'll be wanting to get your main jet size pretty spot on, it's not about chasing hp.

[callboy]

Ok cheers Cammo, I will check whats in there now and then work from there, drop a couple if sizes maybe, if you think I will need to. Its a very high flow mesh filter that I have put in there, so I can't see it being too much more of a restriction as the lid isn't going back on.

[CMSMJ1]

can we get a new thread for this please?

[l00k3y]

great post, just followed it for cleaning out my NC24 carbs and worked a charm, I was having problems with balancing the carbs and followed this, they balanced perfectly after and the bike fuels much better. top stuff

[Hadies]

Very good read. Is this job worth doing whilst on a 33bhp restriction you reckon?

Thanks
Hadrian

[Hadies]

Thanks again for this Cammo.
Just opened up my carbs in preparation for a new exhaust system and found one of the 5 hole jet holders in the front carb and one of the 4 hole jet holders in the rear carb! I'll let you guys know the results once the exhaust is on.
And whats this petrol resistant goo your referring to?

[terryvxr8]