u/arlostoodt

▲ 2 r/dr650+1 crossposts

Fuel Screw Adjustment with Mods

Hey all,

I have a 2019 DR650.

PO installed the procycle jet kit and modified the airbox (opened it up by cutting off the top.)

(see here: "https://procycle.us/product/85?srsltid=AfmBOoo9PWZr0IXrhP2y4OZfuHyf-4DnfPzZSV85u7itIH9ts2Vh\_jN1")

He also added a Lexx MXe exhaust kit

(see here: https://www.rockymountainatvmc.com/parts/lexx-mxe-slip-on-silencer-with-mid-pipe-p?srsltid=AfmBOorOHjiuWmFn6jBHTLFCzQIFMNOSxyXyzj\_9rSdwmJISG6oWXuXP).

Recently, the DR sat for the winter. I installed an Acerbis tank and took it out of its slumber. It was running okay for the few times I got to ride it, and then eventually started giving me trouble. It got to the point where giving it throttle would bog or kill it, so I took out the carb and gave it a good cleaning.

I replaced only the pilot jet (42.5) and cleaned all else. In cleaning, I made a mistake. I should have taken exact note of how many turns out the fuel mix screw was, but I didn't. That said, I know it was more than I was expecting (somewhere between 3-4 turns?). When I reinstalled it, I turned it out 2 full turns and called it a day.

After reinstalling the carb, the bike runs like crap. Idles meh (sometimes a little inconsistent) WHEN it starts but turns off eventually. Sometimes throttle sounds fine, sometimes it kills the bike, sometimes it just acts a little wild. Almost every time I release the throttle, the exhaust pops.

I think that the problem is with my fuel mixture. As far as I could understand, the exhaust popping means the mix is lean, which would make sense if I reinstalled the carb with the fuel screw an additional turn or two in from where it was.

Does anyone have any idea how many turns out I should have it with the mods that have been done to my bike? Taking the carb in and out isn't the end of the world, but it is a bit of a PITA, so I would like to try and have a plan for how many turns out I'm going to adjust it.

Thanks for your help guys.

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u/arlostoodt — 12 hours ago

Easing my DR650 out of winter storage. Ran fine a few weeks ago. Last week it died on me then I left for a week. Today, idled for 4ish minutes, then died. Restarted, then died upon giving it throttle. Sounds like my carb is dirty and gunked up from storage? Just wanting to confirm and also, does it sound like the idle is a bit high? PO put a hole in the airbox and replaced the exhaust, not sure if it may be running constantly lean…

u/arlostoodt — 12 days ago