RVF Jet sizes

[micpec]

I have a Sp style JHA and I run 110 F and 112.5 R on the Dyno but I run a C needle fist clip, think Micpec is running a TSR system with the pipes changing in diameter but I think you wouldn't be to far of the mark if you 110F/112.5R or 112.5F/112.5R all with
extra 0.5mm shim under the needles. It will take a bit of time but you will get there

Correct, I'm running TSR titanium SP1 style system on my NC35, front downpipes are standard, as is for the rear manifold, do have 2 custom made titanium Superpole cans with dB-killers fitted. There is enough backpressure with these cans and running #116 is only a little too rich. Initial with the TSR carbon cans that came with this system, the NC35 was hard to get it up and running (also with jets #116).

[scoops]

Scoops, 108 all round in RVF is standard Why would you go 98 and 100 unless you stuffed a potato down you system ?

98s and 100s and its fueling PERFECT on 2 dynos, tellin yis lads, try it for even 1 run if yis are ever messin about on a dyno

[scoops]

Hi Scoops, that bike you have has the tits tunned off it. Must be something to do with your set up. Did yea get sorted with a shock yet? Its going to feel like an age now before we get back onto the track again.

69 BHP, deffo not the tits tuned off it. If you gave your carbs to Steve in NDM I gaurantee they will come back with very similar set up as mine, Anthony Connors bike is set up the same Steve did that bike too and thats a good yoke to go. Talk to Steve about it, NDM have always had top 400s sure AJ Hutch was doin minutes dead in Mondello on his NDM preped 400! Anthony was top 6 at Sunflower too!

Yeah I got the new Ohlins in, seems good so far, forks need some work tho so until the whole thing is fully set up I wont be able to get the most from it, will be a good yoke for next year, im throwin on a quick shifter aswell!

[Neosophist]

Scoops, 108 all round in RVF is standard Why would you go 98 and 100 unless you stuffed a potato down you system ?

i would agree with Gee. i have rvf carbs on my bike with a stack and they run the same as my mates rvf and his stack, thats 115's all around.

98/100 would surely be shockingly lean.

69 BHP, deffo not the tits tuned off it. !

69bhp from a motor that originally produced 55 is quite a significant gain! Most of the insanly tuned HRC setups only produce a bhp figure in the low 70's.

Especially on these bikes that were designed to make no more than 60hp!

The £4500 bike drunkmonkey brought recently produces 74hp and thats had an immense list of things done to it (http://www.abrmoto.co.uk/hb020.html" onclick="window.open(this.href);return false;)

Oh and not disputing that the bike works fine with 98 jets but fwiw I have 112's all round in my carbs! and the fuelling is pretty much bang on :) Only change in the system is a different end-can.

Going smaller than factory size is unusual unless you have a more restrictive exhaust on?

[dar5150]

69 BHP, deffo not the tits tuned off it. If you gave your carbs to Steve in NDM I gaurantee they will come back with very similar set up as mine, Anthony Connors bike is set up the same Steve did that bike too and thats a good yoke to go. Talk to Steve about it, NDM have always had top 400s sure AJ Hutch was doin minutes dead in Mondello on his NDM preped 400! Anthony was top 6 at Sunflower too!

Yeah I got the new Ohlins in, seems good so far, forks need some work tho so until the whole thing is fully set up I wont be able to get the most from it, will be a good yoke for next year, im throwin on a quick shifter aswell![/quote]


I definitly would'ent argue with what Steve sayes, he knows his onions alright. He did a great job on that shock I got. But with a standard air box /filter in mine I want to run it on the slightly rich side. Just to keep things as reliable as possible. Thats more important to me at the moment than outright power. I'm throwing all the money into the suspension/ brakes for the next year or two 1st.
Glade you got sorted with a shock! That'll be some bike next year. How much is it to get the quick shifter installed? Is NDM doing it? Cheers

[scoops]

The £4500 bike drunkmonkey brought recently produces 74hp and thats had an immense list of things done to it (http://www.abrmoto.co.uk/hb020.html" onclick="window.open(this.href);return false;)

Oh and not disputing that the bike works fine with 98 jets but fwiw I have 112's all round in my carbs! and the fuelling is pretty much bang on :) Only change in the system is a different end-can.

Going smaller than factory size is unusual unless you have a more restrictive exhaust on?

Heres the system on my bike -

Mercury Full System

[scoops]

I definitly would'ent argue with what Steve sayes, he knows his onions alright. He did a great job on that shock I got. But with a standard air box /filter in mine I want to run it on the slightly rich side. Just to keep things as reliable as possible. Thats more important to me at the moment than outright power. I'm throwing all the money into the suspension/ brakes for the next year or two 1st.
Glade you got sorted with a shock! That'll be some bike next year. How much is it to get the quick shifter installed? Is NDM doing it? Cheers

Oh aye, Stevies puttin the quick shifter on aswell, about €450 for the same one he uses on his bike. I reckon it will be money well spent for it after coming this far with the bike

[dar5150]

Oh aye, Stevies puttin the quick shifter on aswell, about €450 for the same one he uses on his bike. I reckon it will be money well spent for it after coming this far with the bike[/quote]

Wish I had the cash! Broke at the moment after after all the bits I've baught. Definitly putting it on the list. Look forward to seeing seeing how your one gets on with it.

[Cammo]

Oh and not disputing that the bike works fine with 98 jets but fwiw I have 112's all round in my carbs! and the fuelling is pretty much bang on :) Only change in the system is a different end-can.

Going smaller than factory size is unusual unless you have a more restrictive exhaust on?

If you restrict the air jets (which is often done on race carbs) you'll need smaller mains.

[Neosophist]

Oh and not disputing that the bike works fine with 98 jets but fwiw I have 112's all round in my carbs! and the fuelling is pretty much bang on :) Only change in the system is a different end-can.

Going smaller than factory size is unusual unless you have a more restrictive exhaust on?

If you restrict the air jets (which is often done on race carbs) you'll need smaller mains.

Oh yeah that makes sense as there wouldn't be enough air to mix with the fuel supplied by the larger jet.

Never really messed with any 'race' setups. However, I am curious as to why the air would be restricted? is it somethign to do with pressure / speed and the way the fuel atomises?

It's quite interesting, especially since it doesn't sound too common on this forum at least. So I wonder what the benefits / drawbacks are.

69 BHP, deffo not the tits tuned off it.

Oh you can certainly still get a few more bhp of the motor, but i've not seen any bikes with more than 73/74hp, which isn't far away from what you have now, and most of them are done with serious work, such as cam regrinds, gasflowed head and ported.

Usually just tuning up with exhausts / carbs gives around 63-64bh.

69bhp is quite high for a honda 400. Anything over 73/74 is usually from a larger bore, (444/450 etc)

I was meerly implying its tuned more than most