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Dave's mods Gasohol 2011 edition

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93 XR650L

Just did half of Daves mods. Haven't started it up yet because I'm still deciding on jetting.

Bone stock exhaust, 5/32 drilled slide, K&N filter, baffle removed, 1400' elevation, GASOHOL.

The biggie is gasohol.

Any ideas on jetting and shim thickness? The gasohol really seems to screw my bike up! I just took out the stock 155/50 since it would barely run.

In addition to jetting and shim thickness, any ideas on whether to grind the screw or the tab? I kind of like the flat sticking out of the mixture screw for ease of turning.

thanks

Edited by ramey36

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It will barely run with the super lean stock settings with a restrictive intake and exhaust. The ethanol in the fuel doesn't help either. I'd start with the 55/158 recommended by Dave's mods. You might need to go even richer.

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Which series jets does this use? Where is the best place to order? Dennis Kirk?

21 series pilot and 13 series main?

thanks

ramey

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In CT they claimed E10 and I had to go richer than 55/158.

Here in NY they claim the same but my 55/158 is working fine.

I filed the tab off the bowl, it's very nice having the tab on the screw.

Dave

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I filed the tab off the bowl, it's very nice having the tab on the screw.

Dave

+1 on the filing of the tab on the bowl.

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in WA we run gasahol, I run 160/55 .28 shim.. runs well, slight brown tint on the plug tip. I have fmf q4, opened up airbox, no snorkel, dave mods.

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+1 on the filing of the tab on the bowl.
Originally Posted by XR650L_Dave

I filed the tab off the bowl, it's very nice having the tab on the screw.

+another on filing the bowl tab vs the screw tab. I just put the bowl tab up to the side of a bench grinder wheel, and it made a nice radiused notch that the screw tab can get past.

Tab on the screw allows for a handy reference. :thumbsup:

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I filed that puppy with a small file with the carb installed. You can almost cut that pot metal with a knife.

Dave

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Dave's mods complete with 158/55. Started up, ran great. Beyond great. Awesome. Went out this morning and it started with about one second of choke and idled perfect. THEN IT SHUT OFF JUST LIKE BEFORE. I almost flipped out. Now I'm stuck with a well tuned carb and the same symptoms as before. Starts quickly, shuts off like electrical but always has spark. Any ideas?

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Did it stall and restart or not restart?

When I was in CT the gasohol there made the bike run like crap! I ahd to jet richer than 55/158 to keep it from stalling at isle or when whacking it open.

Dave

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