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Old 11-09-2013, 12:16 PM   #4621
DutchyKevin
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Quote:
Originally Posted by JensEskildsen View Post
Should be close to stock with the highcomp piston.
that sounds very unlikely?
K&N filter makes for larger jets. Sporty exhaust makes for larger jets.
Highcomp piston makes for higher temperatures (because of higher compression) so you need to add more fuel to cool the situation down a bit -> thus larger jets.

So.. larger jets. Or am I wrong here?
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Old 11-09-2013, 02:36 PM   #4622
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It should need a bit more fuel than stock with that setup. The hi-comp piston itself won't "need" much more than the stock piston, it's the intake and exhaust added flow characteristics that need more fuel added to the extra air running through the motor now.
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'88xt600 , --> '86 XT600(E-start,3TB motor) , --> '89 XT600 , --> '05 KLR650 ,
'85/'04XT600/660 hybrid ,turbo in the future, --> '85XT600 , --> '83 XT550 , --> '83 XL600 ,
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Old 11-10-2013, 11:44 AM   #4623
JensEskildsen
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Highcomp piston needs smaller jets, not larger. And the Xt comes with slightly too big mainjets stock.

Getting the bike on a dyno, or installing a lambdaprobe in the header yourself is the only way to know for sure.
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Old 11-11-2013, 02:08 PM   #4624
LilYoda
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Originally Posted by sorted View Post
Hi, great forum, just been going though this thread ...

I was hoping someone may be able to help me out with the mounting brackets for a 1990 XT600e acerbis tank.

Anybody have a pair they can part with, or know where I can still get them?

look like this ...



thanks
---zeb
Maybe you can make your own, if you can get the sizing of the metal plate, and buy the pegs on the item below

http://www.ebay.com/itm/ANBAUSATZ-F-...item19e3f33fd2
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Old 11-12-2013, 09:32 AM   #4625
mopped phil
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Originally Posted by DutchyKevin View Post
My XT600E is currently undergoing an open-heart surgery.
New cylinder, piston rings and such.

Also the cylinder head and valves are being overhauled and readjusted.

Question:

My XT is sporting a Wiseco high compression piston, K&N air filter and a stainless steel exhaust system of a wider diameter plus a Leovince muffler.

Can anyone tell me what needs to be adjusted to the carburators in order to get the right fuel/air mixture? Currently it's stock.. which is also the reason the engine needs some TLC right now The previous owner failed to have it set up right after installing the new parts..
Depending on the current setup of your carb, there is no general answer possible. It depends on its usage, your average riding height and all the changes to the parts.
You can either change the main jets to bigger size and try your topspeed, then lowering the mainjet seize... there are some generall instructions for it on the net.

BUT: I have a XT from 1995, an open airbox, sports mainfold, LeoVince X3, camshaft stage 2, cylinderhead overhauled and a modified secondary carb(it opens more earlier). I tried to set it up with a bigger primary main jet and a binary lambda sensor. It was running way to rich.

I got a broad-band lamba sensor now and with the stock main jets, it shows the engine runs rich. 0,76-0,78 Lambda (AFR 11.172-11,466) on full throttel. only before the secondary carb opens, it gets lean to 0,95 Lambda (AFR 13,965). I will have to change the positions of the jet nedels to correct that.

So, to be safe, you really need to measure it. Either by lambda sensor or time taking on a track.
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Old 11-12-2013, 10:34 AM   #4626
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Thanks. I was hoping there would be like a standard setting for this stuff. I'll take the bike to a local enduro specialist and have it tuned on the dyno for optimal result
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Old 11-12-2013, 11:48 AM   #4627
mopped phil
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Originally Posted by DutchyKevin View Post
Thanks. I was hoping there would be like a standard setting for this stuff. I'll take the bike to a local enduro specialist and have it tuned on the dyno for optimal result
If he isnt screwing it up, its really worth it. The stock XT is running very rich.
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Old 11-12-2013, 12:19 PM   #4628
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Quote:
Originally Posted by mopped phil View Post
If he isnt screwing it up, its really worth it. The stock XT is running very rich.
Some of these engines are set that way from the factory for better internal cooling. So I would keep fuel-to-air close to stock to be on the safe side.
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Old 11-12-2013, 02:00 PM   #4629
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Originally Posted by A-Wind View Post
Some of these engines are set that way from the factory for better internal cooling. So I would keep fuel-to-air close to stock to be on the safe side.
The guy I'm taking the XT to has over 40 years of experience with thumpers, especially the Yammi's. I trust his judgement haha ;)

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Old 11-13-2013, 07:29 AM   #4630
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Tank bag that fits -

Anyone found a tank bag that fits the tall skinny tank? Old one will not work.
Thanks
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Old 11-13-2013, 11:02 AM   #4631
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I have an 86 , I have wondered if anyone has made a single carburetor manifold into the dual port head or could you block off one port and run a single carb ?? WHY .. these carburetors are very hard to find here and the set I have have been damaged and I had to JB weld one of the arm holding the float pin and dont trust it .
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Old 11-13-2013, 11:12 PM   #4632
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Originally Posted by BIG ED XT FAN View Post
Thanks! This is great!! Now we need a XT600 meet here in the USA!!!:cl ap

I am all in for an XT meetup or maybe even XT/TT meetup here in the states. My vote is to have it in Colorado. Colorado is centrally located, has 1000's of miles of mountainous terrain to rip around on & cause Colorado kicks arse in general cause its my home state at the moment. I live in Denver so I can offer my backyard for all the dirt bag bikers that can't afford a hotel room too. I am sure my neighbors would love it. Nothing like the sound of 100's of thumpers roaring to life in the morning to put the twinkle in the eye of your neighbors I hear. After everybody arrives & we terrorize Denver for a day. Then we can get lost in the mountains for a few days & enjoy some real down to earth "Rocky Mountain High." http://www.youtube.com/watch?v=wP7Chi9MPSg
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Old 11-13-2013, 11:36 PM   #4633
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Originally Posted by Trigxrr View Post
I have an 86 , I have wondered if anyone has made a single carburetor manifold into the dual port head or could you block off one port and run a single carb ?? WHY .. these carburetors are very hard to find here and the set I have have been damaged and I had to JB weld one of the arm holding the float pin and dont trust it .
The carbs come up on ebay from time to time.

Single carb manifolds haven't been known to work as there is not enough room.

I am sorry to say but blocking off one port & running one carb is a horrible idea. Its one of those, "If you have to ask then you probably wouldn't understand." kind of things. Just don't do it.

Either find carb parts to repair your carbs or swap the old carbs for a different set of carbs. Some company makes an overpriced set of aftermarket carbs for the XTs. If you dig through this thread you will find info on them. I believe they are made by Keihin. You can also swap the carbs for a set of carbs off of a Raptor 660 four wheeler.

Another would be to take the carb body to a professional welder. It should be possible to have the broken arm repaired proper by brazing.

Here is a nice set of rebuilt XT600 carbs on ebay right now for $250 http://www.ebay.com/itm/PROFESSIONAL...e1e113&vxp=mtr

Here are the Raptor carbs that will work on ebay. Scroll down to see more affordable options. If you are patient you can get a set of Raptor carbs for around $150 http://www.ebay.com/sch/i.html?_odkw...retor&_sacat=0
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Old 11-14-2013, 12:22 AM   #4634
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Quote:
Originally Posted by Trigxrr View Post
I have an 86 , I have wondered if anyone has made a single carburetor manifold into the dual port head or could you block off one port and run a single carb ?? WHY .. these carburetors are very hard to find here and the set I have have been damaged and I had to JB weld one of the arm holding the float pin and dont trust it .
I probably have a spare set of stock XT600 carbs out in the garage. PM me and I'll take a look.
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Old 11-14-2013, 03:00 AM   #4635
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I have 4 sets of them also,if Joefj1200 doesn't hook you up I can.
The Raptor carbs work good also, it does require the intake boots to be opened up for the bigger carb snouts.The airbox boots also don't fit and you need to make up a whole new filter/boot setup. Kind of a PITA. The Keihins are $450 ish and end up with no airbox also.

I'd be in for an XT ride, don't know if I could make it to Colorado,but do agrre it would be a great place along with Utah or Arizona. Neither a better option for me unfortunately.
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v-- -- -- --v -- -- - -- -v-- -- -- --v -- -- -- --v
'88xt600 , --> '86 XT600(E-start,3TB motor) , --> '89 XT600 , --> '05 KLR650 ,
'85/'04XT600/660 hybrid ,turbo in the future, --> '85XT600 , --> '83 XT550 , --> '83 XL600 ,
'08 525XC , --> '06 LTR450. looking for '96 thru '05 DR650
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