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treydouglass
Posts: 11
Joined: May 03, 2017
Location: Denver, CO
Rides: Motorcycles
Vehicles: Honda XR650L

Re: Dave's Carb Mods

Post by treydouglass » Tue Jun 12, 2018 10:17 am

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

Randy777
Posts: 1
Joined: Jul 07, 2018
Location: Boulder City, Nevada
Rides: HondaXR650L
Vehicles: Ford 4x4 Diesel

Re: Dave's Carb Mods

Post by Randy777 » Sat Jul 07, 2018 8:30 pm

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
Posts: 64
Joined: Jun 10, 2016

Re: Dave's Carb Mods

Post by JoeRC51 » Sat Jul 07, 2018 8:46 pm

The OEM jets ARE Keihin.

jasontojo
Posts: 2
Joined: Aug 06, 2018
Location: West Virginia
Rides: 2013 XR650L, 1995 KX125
Vehicles: 2015 Toyota Tacoma

Re: Dave's Carb Mods

Post by jasontojo » Mon Aug 06, 2018 1:44 pm

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
Posts: 64
Joined: Jun 10, 2016

Re: Dave's Carb Mods

Post by JoeRC51 » Mon Aug 06, 2018 2:56 pm

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.

jasontojo
Posts: 2
Joined: Aug 06, 2018
Location: West Virginia
Rides: 2013 XR650L, 1995 KX125
Vehicles: 2015 Toyota Tacoma

Re: Dave's Carb Mods

Post by jasontojo » Mon Aug 06, 2018 3:00 pm

I used the jets that came with the kit however I did use a jetting drill set to over size the hole. Would this cause the issue? I drilled the main to 160

JoeRC51
Posts: 64
Joined: Jun 10, 2016

Re: Dave's Carb Mods

Post by JoeRC51 » Mon Aug 06, 2018 3:37 pm

Try riding it with the left side cover off of the airbox , if it's better , your too rich.

davisjj
Posts: 3
Joined: Jul 01, 2018
Location: USA

Re: Dave's Carb Mods

Post by davisjj » Mon Nov 12, 2018 5:27 am

How important is enlarging the two holes in the bottom of the slide to 5/32", and what function does it serve?

JoeRC51
Posts: 64
Joined: Jun 10, 2016

Re: Dave's Carb Mods

Post by JoeRC51 » Mon Nov 12, 2018 4:26 pm

It lets the slide open faster for better throttle response. Some of the jet kits have a lighter slide spring for the same purpose. I had the lighter spring AND I drilled my slide before I went to a Mikuni TM40-6 pumper carb.

davisjj
Posts: 3
Joined: Jul 01, 2018
Location: USA

Re: Dave's Carb Mods

Post by davisjj » Sun Nov 25, 2018 9:48 am

Is this the airbox snorkel the post mentions removing?

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