Apologies Dave; missed that bit ; here;
http://www.ebay.co.uk/itm/MIkuni-Carbs- ... 2339ecde3b

and

http://www.ebay.co.uk/itm/Mikuni-Carbs- ... 2339ecda94

Same pics; but one set has rubbers.

There also appears to be a seat cowl for a 3tj if others are interested ( see sellers other items) but he might have the description wrong and mean 4JH .?????

Bill do u think they will work on my 1wg bud ?

Am stood in my garage having just rechecked all valve clearances and they are all within tollerances.to make sure am working from the correct pdf manual are the intakes between 0.11 and 0.20mm exhaust clearances 0.21 to 0.30mm

A couple of the intakes are at the tight end but they are on number 4 which has never been a problem (0.11 and 0.12).
I will adjust them out while im back in there but they are still within tollerances as per the pdf I have so shouldnt be an issue.

Scratch head time ..

I cannot state 100% ; that is why I asked others to join in .
See if other folk are forthcoming with info and gamble you can get them cheap would be my advice.
Even as a test set; they could save £££££s.
Look at the price of carb spare parts !

I reckon the bike would run on them - they'd probably need a little bit of fettling but Bore and stroke of the bike is similar it's just the exup exhaust thats the main difference.

This isn't a garentee

willandrip wrote:Yes they do; I use mine on the bend at the very top which is the hottest part of the pipe.
It gives the most consistent reading and an easy to re-read target.

Just gone out and done a little test; (coz I was interested in the question too )

Gun is rated to 380 c.

At Idle and warmed up ; 1100rpm = headers 270 c and remained stable at this temp.

Run at constant 6000rpm for 3 minutes = headers rose from 270 c to 450 c on the gun.

At 450-454 c the gun screen flicks back to 450 c (like a page refresh )

It is unknown how hot the headers got above this.

The guns will be rated accurate to 380 c but must go higher .

I can not recall seeing over 295c when I have been on with it previously doing mixture screws.

Nice when you learn yourself something .

Thanks for that, I've just seen some on eBay that go to 550° or 900° so will try one.

Well well ive only gone and sorted it. All shims now well within spec but wat was causing it was fuel height.i set them up ages ago on the bike and they were spot on but on the bench 1 and 2 were way low. 3 and 4 were slightly low .all adjusted and fired great. Fan isnt coming on when it gets on the red but thats prob a loose wire due to being on off the bike so much. Will test again from cold in morn and hopefully we can close this thread then :-).
Thanks all for your help top boys .

Fingers crossed for morning :-)))))
Dave.

You won't sleep so well nah, sounds like you found it

Where do we start here then ?

From the first post on somewhere else ;

"hi guys
I have had the carbs in as many peices as possible many many many times thinking it was a blockage but now they are spotless and set up correct so all is well there .
]dave "


Quoted from this topic ;

Q= "The one of the bike upright with the fuel level tubes from some time ago ; that just seemed like it was slowly running out of fuel. Did raising the fuel level a few mm sort it out ?"

A= "First thing I did was strip carbs mate but I know what ur sayin bud"

When diagnosing remotely; one must have some faith in the owners replies to specific questions !

Wouldn't care; but Dave is anal about carb strips and float height settings...... He spent days getting the bike to run correctly when first purchased. Pity he forgot how to do it !

Got to be the most costly float height issue ever !

Right ; ribbing over.... stay in your room till tea time.

Harrumph

Bill.

Taken on the chin bill. I did that much in the end I was chasing my tail. I did however set the heights up with carbs on bike and they read correct ? I ran it up to temp then shut off and then checked.i cant understand how they read different when off the bike.the bike was level when I did it as where the carbs on the bench.

Anyway there is one thing for sure my knowledge of all things fzr has swelled big time.

By the way the bonfire party is off unless my aprilia doesnt start lol.

Well the bike will have liked all the attention anyhow .

What do you use for a fuel supply when testing on and off the bike?
Is the fuel pump utilised in both cases ?

Are you certain of the bench test angle.

I think you use the fuel level method ?

Just to give you something to get OCD (CDO) about as way of retribution;
Perhaps the float needle springs are "saggy" and giving a false reading on the bench.
There is a recent topic on the Exup UK forum where blokes have struggled setting float heights (dry method with a cut out card) where new float needle valves cured an "impossible to accurately set" problem.
http://www.exup1000.co.uk/phpBB2/viewtopic.php?t=12952]

Your Aprilia is one of the very few modern bikes that appeals to my tastes......keep well away from it with tools !