I'm in the process of taking carbs out of my project Vfr for a good clean, I think my bike is an 89 k model I've only checked frame number which starts NC30 101xxxxxx can somebody confirm this please if it is a k model is it best to keep jetting as stated in the manual which is 35 on the pilots and 110 on all main jets as the uk spec ones have 122 mains on the front and 120 on the rear cylinders

Cheers

I am sure that these questions will be asked by anybody else who gives you their ten pence worth. What can and system are you running, and also have you made any alterations to the air filter etc? If it's all standard they should be 110s all round according to the manual but they are jetted to run quite lean from the factory. So it depends on those other factors as well. Post a few more details and I am sure everyone else will chip in with what they use.

Mine is an 89R3K and it had a standard system and can and 110s all round and fuelled fine.

The bike has original exhaust on at the moment probably will put something like a tyga system on or maybe go for the cheaper option of cutting end can off and and modding pipework to take new endcan anyone done this?
airbox i think is all standard, i've only spent an hour having a look at it since i got it and really no nothing about them used to me 2stroke racer much simpler so just trying to get as much info as i can really

If you can afford to spend the money then I would wholeheartedly recommend getting the full Tyga system with one of their end cans, they have a good range of sizes and styles of can from a stainless one that looks very much like stock, through carbon cans, to the maggot which I run. Lots of people cut their original systems and get links and collars to fit an aftermarket can. As has been said before by myself and others, if you have a tidy all original uncut system then hold onto it as they are going up in value, and get a pre-cut one off ebay. Have a look at Cammo's guide to rejetting carbs it covers the most common mods people make to their carbs on the NC30 i.e raising the needles by 0.5mm, drilling the slides, and rejetting to suit can and pipe. Here's a link to the thread:

viewtopic.php?f=24&t=14524

And a quote:

"Standard jet sizes are: 1989 Jap model (4 x 110), all other year Jap models (2 x 115f, 2x 118r), all UK bikes (2 x 120f, 2 x 122r). 1989 Jap bikes run very lean from the factory, best to rejet as a precaution. Other year Jap bikes will need rejetting if you run any non-standard parts (pipe etc).

Main jet sizes: If you run a nice sounding aftermarket exhaust and/or pipe, then the common consensus is to run 118 size front and 120 size rear (often referred to as 118/120). If you run a very high flowing/loud exhaust or full exhaust system then you may wish to consider running 120f/122r size main jets."

I now run a standard induction system: OE filter and no modifications to flaps or snorkel, full Tyga system with a Maggot end can, raised needles and rejetted carbs to 120f/122r which helped heaps in smoothing out power delivery across the rev range.

I am sure somebody else will give you a run through of how to fit an aftermarket can and what is available.

Thanks for your help and the link is really good i'l have a go at that the weekend