4Strokes.com

[JoeRC51]

Thanks Joe - but once you unscrew and remove the float bowl, it isn't in the way any more, and you can adjust the screw (to 2 1/4 turns out). And then just put the float bowl back on. Am I missing something? I guess I still don't understand why it's necessary to file down the tab.

So you can adjust it if necessary WITH the float bowl ON.

[treydouglass]

Gotcha - thanks for clarifying Joe, very helpful.

[Reanimator]

On my 2016 Xr650l, I gotta d-type air-fuel screw on my carb and I adjusted it 2 1/4 turn as specified on this website and got it dialed in. Every bike is different and takes adjustments here and there. Trust me after all of the work, you will have something beautiful that will have you saying, "Yeah, I did that"! Keep going you're doing well!

[treydouglass]

Hey fellas,
I'm back. After a couple months, I completed the carb mods with new jets, adjusted for local altitude (5,280ft.). I finished the mods, took the bike out 2 weekends ago and rode around the neighborhood, for just a couple miles, and everything seemed to be working fine. The bike started much better, which is great. Got all excited and took the bike out yesterday to do a longer trail ride outside Denver, and got about 100 yards before the bike just completely shut down and started leaking fuel. Looks like the gas is leaking out of the carb, specifically from a hose that comes from either the bottom or the side of the carb, I can't tell. But the hose is attached to the carb, and the other end is unattached and just hanging below the carb (I think that's where the fuel is coming out). When I turn off the fuel, it stops leaking; when I turn it on, it starts leaking. I must have screwed something up when I put the carb back in after working on it? I'm not sure. Really frustrated now, not only because I couldn't ride yesterday - lots of work for nothin' - but I also have a longer trip coming up next month and really wanted to have the bike ready. So, any ideas how I might have screwed up? Is there supposed to be an open-ended hose coming out of the bottom or side of the carb? It isn't the fuel line, I checked that. Any suggestions?

I wanted to do all the work myself, but may just have to take it to a mechanic that knows what he's doing so I can hopefully have the bike ready by next month. Does anybody have a recommendation for a good mechanic in Denver? Thanks again.

[JoeRC51]

Your float valve is sticking or has debris in it. Towards the bottom of the carb , on the left side I believe , is a brass slotted screw , that's your float bowl drain. Open the screw about one turn and let the gas run out , turn the petcock on until gas comes out again and close the screw. Sometimes this will flush crap out of the valve. See is it still overflows now. You can try this a couple of times , but if it still overflows , you have to take the float bowl off of the carb. You can hook up the fuel line with the float bowl off and gas should normally stop flowing when you lift the float. If not , either it has something in between the needle and seat or they're worn or varnished from old gas sitting in the carb.

[treydouglass]

Thanks for the response Joe. I'll do as you suggest and see if that flushes out the valve.

[Randy777]

Hey I just want to thank Dave and everyone who chimed in on this Mod. I finally got the time to do it and I am overwhelmed with the difference. I ordered a 158 and 55 as my altitude is about 2200 here in Boulder City, NV. I ordered the OEM jets instead of the more expensive Keihin jets so for about $20.00 I have a much faster bike. My 08 650 runs like a scalded cat.
The Mod only took about an hour so once again guys thank you very much.

Randy

[JoeRC51]

The OEM jets ARE Keihin.

[jasontojo]

I am having issues after doing the dave's carb mod. Everything seems well and good until I reach speeds above 65 mph. The motor begins to stumble and acts like it is starving for gas.
I live at 1100 ft. and should not be having jetting issues. I had the bike set up with a dyno jet kit from the Honda dealer at the time I bought the bike back in 2013. Ran great but we have #$%^ gas here and I left the carb over winter with out winterizing it and had to rebuild the carb with a moose kit seeing that it had all the parts.
Any help would be great because I need my two wheel fix here.

[JoeRC51]

You can drill the slide and use the DJ kit , you can use the DJ spring with Dave's mod , BUT you CAN NOT mix Mikuni jets and needles with DJ jets and needles. They both use different numbering systems and the needles only work well with the appropriate jets.