I think I may need new inlet manifolds. Anyone in Aus have a spare set for sale?

[momodasaint]

Momo,

One thing that is going to be difficult to get direction, other than general tuning advise, for your XJR carbs is they use different slides, needles, emulsion tubes and jetting sizes. Pete is correct about raising the needle and lowering the clip to the bottom groove to enrich the circuit.


On the XJR, going from the air box to pod filters is a significant difference in air flow to the engine. The carbs will need to be properly jetted as the stock jetting is for the restricted air intake.

When I work on this US imported XJR last year Don't see one of these everyday in the ol' US of A, we converted the internal parts over to FJ parts and the bike never ran so good. I also replaced the smaller intake manifolds with the 36Y's

He did not want to install pods filters. I noticed the bike would just flatten out on the higher revs and speeds. After looking at the restrictive inlet snorkel design of the air box, I removed the lid and the bike ran great. So, since he did not want pod filters I modified the air box end plate of the air to match the internal hole of the air filter. I thought I took some photos, but I'm unable to find them right now.

Randy - RPM

sorry Randy did you say that the clip has to go away from the ground the get a richer mix?   As in move the clip up the needle towards the diaphram.  Because I have moved it down towards the ground.  Im a little confused so if I can be overly clear so I don't get it wrong. If looking at the needle and the notches are at the top, do I take the clip off the needle and put it back in the notch above the one it came from?

[momodasaint]

You know I  was just thinking last week that my feet had gotten bigger but then again maybe its just because I'm so much closer too em these days.   It seems that over the years I be shrinking...didn't think it had got THAT bad but when you realise that your feet don't touch the ground like they used to last year, you have to come to the conclusion that something is wrong...   my doctors said it's "Nephewitus" or having one too many nephews in my DNA. or it could just be my nephew LOL.

Anyhoo, let me fill ya'll in on some jet sizes and other info I discovered as the Stock sizes an XJR1300 has from factory.

Main jet(M.J.) - #107.5 - This being the important one for my problem I'm told.  I'll get a #110 & #112.5 to be sure.
Main air jet(M.A.J.) - #80
Jet needle(J.N.) - 5D118-53-3
Needle jet(N.J.) - P-0M
Pilot jet(P.A.J.1)- #140
Pilot outlet(P.O.) - 1.0
Pilot jet(P.J.) - #15
Pilot screw(P.S.) - 2
Valve seat size(V.S.) - 2.3
Starter jet(G.S.1) - #52.5
Starter jet(G.S.2) - 0.8
Float height(F.H.) - 33 -34 mm
Intake vacuum - 31.3 kPa (235 mmHg)

I know that theres a couple there that double up, like the Pilot jet but it has the letter codes next to them to differentiate between them. I found this in the Yamaha Mechanics Manual for XJR1300 SP.

Oh and because we are getting 40* Celsius days here downunder,  I was wondering if someone can explain to me how the different spark plugs work. For example, a plug that is sold as 1 stage cooler, is that plug for operating in cooler weather than normal or hotter weather than normal?

And if anyone has any advice on the correct jets to get for my setup would be greatly appreciated.

Engine is stock except for a 4* advance.
Twin K&N filter pods
Stock exhaust
Bike is 100% at sea level
70/30 city riding/highway riding
Bike does ping with standard fuel
I have purchased but not installed Dyna coils 3.0 ohm as well as the 5 pin relay for these(hopefully installed very soon)

I have no idea if the stock jets are fitted in this bike but when looking at the screws on the carbs they are all in mint condition and are the OEM variety, so I would assume that nobody has touched them before I adjusted the needles one notch richer.

Thanks for all assistance

Bender

[racerrad8]

Momo,

One thing that is going to be difficult to get direction, other than general tuning advise, for your XJR carbs is they use different slides, needles, emulsion tubes and jetting sizes. Pete is correct about raising the needle and lowering the clip to the bottom groove to enrich the circuit.

On the XJR, going from the air box to pod filters is a significant difference in air flow to the engine. The carbs will need to be properly jetted as the stock jetting is for the restricted air intake.

When I work on this US imported XJR last year Don't see one of these everyday in the ol' US of A, we converted the internal parts over to FJ parts and the bike never ran so good. I also replaced the smaller intake manifolds with the 36Y's

He did not want to install pods filters. I noticed the bike would just flatten out on the higher revs and speeds. After looking at the restrictive inlet snorkel design of the air box, I removed the lid and the bike ran great. So, since he did not want pod filters I modified the air box end plate of the air to match the internal hole of the air filter. I thought I took some photos, but I'm unable to find them right now.

Randy - RPM

sorry Randy did you say that the clip has to go away from the ground the get a richer mix?   As in move the clip up the needle towards the diaphram.  Because I have moved it down towards the ground.  Im a little confused so if I can be overly clear so I don't get it wrong. If looking at the needle and the notches are at the top, do I take the clip off the needle and put it back in the notch above the one it came from?

Nope, I fixed it, Pete was right, I just wrote it wrong...

Randy - RPM

[FJools]

I just ordered a set of 4 from Yahoo Japan - total 18,000 Yen/US$208/A$270 plus delivery.

If you want brand NOS You could try a quote via JP Parts and see they are much cheaper than in Oz
http://global.jp-parts.com/

We stock brand new, not NOS, Yamaha Intake Manifold Set for $157.63USD and include a set of
Intake Manifold O-Rings as well.

Robert - RPM

My mistake they are New not NOS.

The only problem I have with most sources within the USA is the shipping cost from the USA to Australia.
From Japan via ems its only around $30 and here within 2-3 days