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Old 10-30-2012, 12:04 PM   #15061
sintax
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Quote:
Originally Posted by babuja View Post
Need some help with table.

Regarding Main Jet, Gary says: " Use a Main Jet one to two size larger when your side panel is cutout".

I'm using XRonly side panel cut out.

In your experience, where did you find best results with main jet: 1 or 2 size larger? Tnks
Start with one, then try two.

Find a nice wide open section, mark off flags (or land marks) on the side of the road, maybe 100 yrds apart, come through first session at speed, roll on full throttle, measure the time it takes to get to a certain speed, say 65 or 70 mph. Which ever jet gets you there with the least amount of time, and cleanly, is your best option.

If you spend a lot of time at the top end of your throttle, maybe jet one size fatter than you think to keep it cooler.
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Old 10-30-2012, 12:11 PM   #15062
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Quote:
Originally Posted by tomaszb2 View Post
For example: What is the nominal diameter of the individual jets in the carburetor in mm? Most need dimensions Main jet and Pilot jet
I did a few quick searches, but I could not find the info I was looking for.

Someone, maybe sudco, has a chart that breaks down jet size vs diameter. I just could not find it.

If I stumble across it, I'll post it up later.
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Old 10-30-2012, 12:26 PM   #15063
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I also searched and found nothing.:/ Thanks for everything

Ok.

Main jet 120

Pilot jet ??

tomaszb2 screwed with this post 10-30-2012 at 01:45 PM
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Old 10-30-2012, 02:48 PM   #15064
szramer
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Quote:
Originally Posted by Sean-0 View Post
spall pull fan is the go
a bracket i had made up

was going to get a heap made but the guy wanted 30 bucks a bracket and i told him he's dreaming

u wanna make one cheap this winter??
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Old 10-30-2012, 03:10 PM   #15065
nick5446
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Quote:
Originally Posted by sintax View Post
I did a few quick searches, but I could not find the info I was looking for.

Someone, maybe sudco, has a chart that breaks down jet size vs diameter. I just could not find it.

If I stumble across it, I'll post it up later.

Jet size/100 = diameter...a 120 jet is 1.20mm in diameter, 80 jet is 0.80mm, etc


This is good information if you ever decide to drill out your jets (now wait as 25 people chime in to tell you what a bad idea that is). Divide by 25.4 if you need your diameter in inches.
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Old 10-30-2012, 03:32 PM   #15066
Cpt. Ron
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Quote:
Originally Posted by nick5446 View Post
Jet size/100 = diameter...a 120 jet is 1.20mm in diameter, 80 jet is 0.80mm, etc
Got something to back up your claim?
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Old 10-30-2012, 03:49 PM   #15067
nick5446
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Quote:
Originally Posted by Cpt. Ron View Post
Got something to back up your claim?
Research and experience? I don't know...measure some if you don't believe me.
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Old 10-30-2012, 03:54 PM   #15068
nick5446
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Quote:
Originally Posted by Cpt. Ron View Post
Got something to back up your claim?
Just did some googling...there's a bunch of charts backing up my claim. Here's one: http://www.affordablegokarts.com/Dri...ain%20Jets.php
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Old 10-30-2012, 03:59 PM   #15069
lstzephyr
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Quote:
Originally Posted by DELTATANGO View Post
Who makes some taller bars for and XR?
I'm 6'3 and I need some taller bars.

Also what is a good front tire?

I ride it on the street some to get to the dirt. Do y'all just ride regulars knobbiest? I have a DOT legal Perelli on the front that sucks off road. Does LE check the tires? They don't here.


I like those graphics.
I ran either a d606 or a IT desert front. I loved the IT desert rear. I always just rode knobbies in the desert but I didn't spend much time on asphalt. Something like 70/30. Hell I took dirt roads to class, the grocery store or the bar even.

In alabama I have always used supermoto rims as I don't know where the offroad is.
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Old 10-30-2012, 04:03 PM   #15070
sintax
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Quote:
Originally Posted by tomaszb2 View Post
I also searched and found nothing.:/ Thanks for everything

Ok.

Main jet 120

Pilot jet ??
Are you asking what jets we run?

If so, here is where i'm at now...

Pilot - 27.5
Pilot Air jet - 1.2
Jet Needle - 9DJY1
Needle Jet - Y4 (but moving to a Y6 this weekend to test)
Clip - 2.5 (washer under, clip in pos 3)
Main - 140

Currently my pumper is disabled for tuning reasons.

I'm at 1850 ft, ~75 deg F, 30-50% humidity

Starts and idles great (like beyond great) small stumble off idle (which pumper will fix) light surging 1/4-1/2 throttle, very nice and clean 1/2 to 1/1 (pretty happy up top)
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Old 10-30-2012, 04:14 PM   #15071
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Quote:
Originally Posted by sintax View Post
Are you asking what jets we run?

If so, here is where i'm at now...

Pilot - 27.5
Pilot Air jet - 1.2
Jet Needle - 9DJY1
Needle Jet - Y4 (but moving to a Y6 this weekend to test)
Clip - 2.5 (washer under, clip in pos 3)
Main - 140

Currently my pumper is disabled for tuning reasons.

I'm at 1850 ft, ~75 deg F, 30-50% humidity

Starts and idles great (like beyond great) small stumble off idle (which pumper will fix) light surging 1/4-1/2 throttle, very nice and clean 1/2 to 1/1 (pretty happy up top)

My carb is fine for now, but can I get those weather settings for my bike in eastern Nevada?
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Old 10-30-2012, 05:00 PM   #15072
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Quote:
Originally Posted by nick5446 View Post
Just did some googling...there's a bunch of charts backing up my claim. Here's one: http://www.affordablegokarts.com/Dri...ain%20Jets.php
I did some googling, too. Found this:

" DynoJet jets are marked according to the diameter of the hole in the
jet .. ie: DJ150 = 1.5mm and DJ175 = 1.75mm.

This is not true for Mikuni or most other OEM equivalent jets. This size
Mikuni jet, (N102.221 Super BN), is marked according to its' flow rate,
ie: 150 = a rating of 150 cc of fuel per minute. "


From:
http://vmaxoutlaw.com/tech/dyno-mikuni.htm


And this:

"1) Keihin - OEM main jets - Jets are measured using an unknown convention in steps of 2 or 3. Available from Kawasaki dealers 2 sizes larger and 2 smaller than the Ninja 250's stock #105 main jets.

2) Dynojet - Measured in mm. Dynojet numbers are simply the hole diameter. A 140DJ main has a 1.40mm (0.055") diameter hole in it at the threaded end. Available in .02mm increments. Marked with a 'DJ' on the jet.

3) Precision Engineering - Also sold under the names 'RD Precision Engineering' and 'Freeman Automotive' - All are marked with an 'AB' on the jet. Like Dynojet, measured in mm, but come in .025mm increments.

4) Mikuni - Made for Mikuni Carburetors, but will also fit Keihin. Available in 2.5 increments. Mikuni uses yet another measurement convention - reportedly based on flow rate. The result is that Mikuni's sizes are vastly different from the other makers'. "


From here: http://faq.ninja250.org/wiki/Dynojet...zes_conversion


I'm not saying either way is correct. Just goes to show that if you read it on the internet, it must be true.
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Old 10-30-2012, 09:22 PM   #15073
Keith
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Quote:
Originally Posted by hontri View Post
You used to be able to get the fans on Ebay for about $40 but i don't see them there at present.Here is what you want:
http://www.spalusa.com/store/main.as...&item=30103018

Found some, while searching for options.

http://www.ebay.com/itm/SPAL-Fan-4-P...b35bd0&vxp=mtr

A little more expensive this time around.
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Old 10-30-2012, 10:09 PM   #15074
thisflatearth
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So if I want a ripping 4 stroke single for the street but live in NJ can i build a XRL into an XRR maybe starting with a XRL chassis and title and putting all the hot parts into it from the XRR?

Or do I just buy a hot XRL title and hope no cop ever checks the vin

This is what 3 nights of 16 hour storm standby at work does to my fragile jello brain

Dont laugh but I miss my KLR and always wanted to bump it out to 705 and swap out the dollar bin suspenders but every time i thought about the $$ wasted vs getting something better all around, then i sold it and bought the evverfun buell

Either dismiss this as silly reTHoric or endulge my tiredness

or do I just buy a KTM/HUSQY?ETC
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Old 10-30-2012, 10:14 PM   #15075
lstzephyr
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No, you can't use the watercooled XR650R engine in the XR650L frame. However you could build a hotted up air cooled XR600R in a XR650L frame. It would be 85% of the performance of the XR650R in my opinion.

I always wanted a kickstart xr650l framed XR600 punched to 628cc with crf450 forks. I think it would be a blast.
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