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Old 04-13-2012, 10:11 PM   #1
XRSDD74
 
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XR650l jetting?

I was hoping someone here could help me figure out my jetting. I have done the daves mod on the carb, opened the air box( holes in the side cover) DG slip on pipe, k&n air filter, smog delete. I have been in the carb a few times got it close. I just put the pipe on today and it runs better on the mid to high rpm range, but it has a heck of a bog in it. in the carb I have a .022" shim on the needle a 158 main and a 55 pilot jet. With out the pipe I have tried different jets but go horrible gas milage. And I'm sure with the addition of the pipe it could use some bigger jets but I think if I can get the bog out this bike would be a rocket. I have a needle from a Dynojet stage one kit that is adjustable should I be using this and if so what slot on the needle should I use. Any help would be great thanks
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Old 04-14-2012, 11:26 AM   #2
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Re: XR650l jetting?

Quote:
Originally Posted by XRSDD74 View Post
I was hoping someone here could help me figure out my jetting. I have done the daves mod on the carb, opened the air box( holes in the side cover) DG slip on pipe, k&n air filter, smog delete. I have been in the carb a few times got it close. I just put the pipe on today and it runs better on the mid to high rpm range, but it has a heck of a bog in it. in the carb I have a .022" shim on the needle a 158 main and a 55 pilot jet. With out the pipe I have tried different jets but go horrible gas milage. And I'm sure with the addition of the pipe it could use some bigger jets but I think if I can get the bog out this bike would be a rocket. I have a needle from a Dynojet stage one kit that is adjustable should I be using this and if so what slot on the needle should I use. Any help would be great thanks
Howdy, I'm pretty sure the DJ needle is designed to work with the DJ mainjet. The I.D. taper and needle taper are slightly different from stock. Here's a few blurry pics, the DJ main is longer than the stock main and If I remember correctly the DJ needle is longer as well.



If you look close you can see the difference in the I.D. tapers.



My DJ needle clip is set at the 3rd position. Sorry I can't be more help but I installed the kit when I bought the bike in '06 and can't remember all the details. The kit came with the purchase of the bike and the PO had never installed it so I threw it in that night. It works! It gives the same performance results as Dave's Mods.
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Old 04-14-2012, 12:04 PM   #3
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Re: XR650l jetting?

I just completed these mods about a month or so ago and I followed the directions to the letter and it came out great. The only difference that I can see is the after market pipe, I am still using the stock exhaust. Is the bog all the way thru the throttle action or just at first as you come off idle? If it is just off idle then I would suggest checking your mixture screw setting as this has greater effect on the low end until the main jet comes into play. I set mine at just a little over 2 1/4 turns which was actually pretty close to the stock setting. Also make sure you are getting a good seal on the rubber boot of your intake manifold at the carb a leak would cause bogging and bad performance. Hope you find your problem.
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Old 04-14-2012, 04:02 PM   #4
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Re: XR650l jetting?

Thanks guys. I have been on the Internet most of the day searching for clues on how to get rid of the bog. I just ordered some different jets and a new mixture screw( mine broke the other day. Now I'm just waiting on parts.
Bobbilly- the bog is just off idle when I get my new mix screw that is where I will start.
Rman- I have since pulled all the dj parts out of the carb. If I remember right the dj made mine run rich I think it came with a 165 main.
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Old 04-15-2012, 03:19 PM   #5
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Re: XR650l jetting?

http://www.4strokes.com/tech/honda/xr650lcarbmods/
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Old 04-17-2012, 08:27 PM   #6
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Re: XR650l jetting?

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Originally Posted by XRSDD74 View Post
Thanks guys. I have been on the Internet most of the day searching for clues on how to get rid of the bog. I just ordered some different jets and a new mixture screw( mine broke the other day. Now I'm just waiting on parts.
Bobbilly- the bog is just off idle when I get my new mix screw that is where I will start.
Rman- I have since pulled all the dj parts out of the carb. If I remember right the dj made mine run rich I think it came with a 165 main.
XRSDD74 let us know how things turn out, then come join us in the "Honda XR650L Owners sign in" thread, those guys can help you with about any problem you have with your bike and are more than happy to help you spend your money on your bike.
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Old 04-18-2012, 05:14 AM   #7
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Re: XR650l jetting?

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Originally Posted by bobbilly416 View Post
XRSDD74 let us know how things turn out, then come join us in the "Honda XR650L Owners sign in" thread, those guys can help you with about any problem you have with your bike and are more than happy to help you spend your money on your bike.
I will post an update as soon as my parts come in. I am ready to get it put back together and riding again.
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Old 04-20-2012, 03:49 PM   #8
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Re: XR650l jetting?

Ok guys thought I would post an update. I finally got my bike put together and runin again. So far very happy with the way it's running. Bog is gone!!! Just to give a final mod list in case any one in the future might want to do the same thing to there's .
Daves carb mod
162 main and 60 pilot jets
Needle shimmed with a .022 thick washer
Air box modified(holes in side cover) and de snorkeled
K&N air filter
DG o slip on muffler
Desmogged
48 tooth rear sprocket
Thanks for the help guys
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Last edited by XRSDD74; 04-20-2012 at 03:53 PM. Reason: Spelling
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Old 04-20-2012, 04:53 PM   #9
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Re: XR650l jetting?

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Originally Posted by XRSDD74 View Post
Ok guys thought I would post an update. I finally got my bike put together and runin again. So far very happy with the way it's running. Bog is gone!!! Just to give a final mod list in case any one in the future might want to do the same thing to there's .
Daves carb mod
162 main and 60 pilot jets
Needle shimmed with a .022 thick washer
Air box modified(holes in side cover) and de snorkeled
K&N air filter
DG o slip on muffler
Desmogged
48 tooth rear sprocket
Thanks for the help guys
them jets sound big to me, but thats just me. are those oem jets or aftermarket? i ended up with 55/158 with no problems. bigman had 55/160 i believe and the plug was almost black. check your plug after 50 miles or so and let us know
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Old 04-20-2012, 07:27 PM   #10
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Re: XR650l jetting?

Quote:
Originally Posted by XRSDD74 View Post
Ok guys thought I would post an update. I finally got my bike put together and runin again. So far very happy with the way it's running. Bog is gone!!! Just to give a final mod list in case any one in the future might want to do the same thing to there's .
Daves carb mod
162 main and 60 pilot jets
Needle shimmed with a .022 thick washer
Air box modified(holes in side cover) and de snorkeled
K&N air filter
DG o slip on muffler
Desmogged
48 tooth rear sprocket
Thanks for the help guys
Glad to hear that you got it running good and the bog is gone, but I agree with Iridered the jets seem a bit on the large side, but each bike is a little different and with your aftermarket exhaust the jets might be right. But do check your plug after a little riding.
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Old 04-20-2012, 07:34 PM   #11
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Re: XR650l jetting?

Ya going to put some miles on it tomorrow. Today was just the first short test run. When I get done I will Pull the plug and check the mpg's. I don't have the Dynojet stuff in any more but I still have it all. When i was going thru all my jets seeing what all I had the dj main was a 165. Do you happen to know what size your kit came with? And my dj kit didn't come with a pilot jet. Maybe I got a hacked kit. Just curious
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Old 04-21-2012, 05:13 PM   #12
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Re: XR650l jetting?

Well I went for a pretty good ride today. The bike ran great. Put over 140 miles on it. When I got home I pulled the plug to see what it looked like. Just like I figured it was clean. I think I'm set. Woohoo
Here is my plug

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Old 04-21-2012, 05:19 PM   #13
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Re: XR650l jetting?

Thanks again for everyones advice
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Old 04-22-2012, 06:43 AM   #14
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Re: XR650l jetting?

that plug looks pretty good. maybe you could go one size bigger.
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