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Fuel Reg. Mod ? anyone?

anyone remember the details (or whereabouts thereof) on swapping the r1100s fuel press. reg. for the k1200's . It sounded like it helped out for mimimal cost / time.

THX
Reino

Old 02-10-2006, 04:18 PM
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Pull the tank and then the battery/battery box ( much easier if you don't gots ABS ) - the reg. is right in front of the air box. A good time to install quick disconects for the fuel lines...and change the fool filter....

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Old 02-10-2006, 05:12 PM
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of course, you can just mod the stocker via the 'crush' method. However, just willy-nilly upping the pressure some unknown amount isn't very efficient. I've been toying with the idea of (and RBRSR aleready has a setup) of a bosch billet adjustable regulator with gauge.
do a good 0=0 TPS dialin with the voltage set to .380MV (do a search here and you'll find volumes on this) and I'd bet lunch the surging will go away; also try some conventional NGK plugs (BKR7EA-11, a honda motorcycle part #).
or you couold just tape over 1/2 the snorkel; that'll fatten it up across the board
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Old 02-10-2006, 05:18 PM
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I did the k12 with good results, but I also had aftermarket exhaust, sj power filter and duct. have to breath in and out better to use that fuel. I think it was a 3.4 bar. stock is 3.0 bar. cost of regulator was 40 bucks.
Old 02-10-2006, 06:17 PM
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I introduced this mod to the board in 2000. I do not remember anyone who used it having a negative result other than a slight loss of gas milage. It works on stock and modified bikes to richen the lean fuel map to a more desirabe one.
Old 02-10-2006, 07:35 PM
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Thanks for the info. I have zteknik sp? exh. w/ k&n filter and just dont want to run too lean. I do not have chip so I was thinking it might be a bit lean. So it's under the tank, in front of the filter.
is ither anything specific about the procedure now that I know how to locate it?

k1200s w/ 3.4 bar correct?
Appreciate it.
Old 02-11-2006, 06:05 AM
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Old 02-11-2006, 06:14 AM
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I did it without bleeding the abs system. I unbolted it and moved it just enought to change the reg, leaving the hydraulic lines hooked up on the abs.
Old 02-11-2006, 08:11 AM
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part number for the K12S regulator? I have searched the Max BMW microfiches to no avail.
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Old 05-30-2007, 05:30 PM
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Cool

It's k1200RS
Old 05-30-2007, 05:47 PM
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found it! $61 at Max BMW
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Old 05-30-2007, 06:13 PM
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It will run to rich
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Old 05-30-2007, 08:10 PM
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Just a little.... overall a good mod. IMNSHO .
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Old 05-30-2007, 08:16 PM
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It's a bit of a hack mod unless airflow through the motor has been drastically increased. Parts of the stock mixture curve are of course too lean, but some are right and some too rich. You're fixing one part, and hurting two parts, in most cases.


This is like most short cuts where fools believe they're getting something for (almost) nothing. In a well mod'd bike like Ed's, it can be useful, but for most, it's just burning more fuel and enjoying the placebo effect. This is just like all the guys in the old days with mildly modified V8s that thought they needed 850 double pumpers. Just makes no sense.
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Old 05-31-2007, 09:24 AM
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would my laser exhaust and induct count as a drastic increase in airflow? or am i just a fool?
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Old 05-31-2007, 03:56 PM
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no, not drastic,
you can probably use some enrichment on bottom and top, but not mid.
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Old 05-31-2007, 04:01 PM
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Something that will fix the problem in the works !
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Dyno'd 104Hp 74.3 ft lbs torque at the rear wheel
1150 cylinders 12:1 pistons/ race cams, Lennies induct, Laser Boxercup II Exhaust, Ohlins shocks, Dymag Carbon Fiber Five Spoke wheels, Crossover tube removed, heads ported and polished Bigger valves installed intake and exhaust! SJ power filter, motoyoyo clamps , HID
Old 05-31-2007, 05:25 PM
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fess-up EZ, whatcha working on?
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Old 05-31-2007, 05:31 PM
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just wait and see new product !

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Dyno'd 104Hp 74.3 ft lbs torque at the rear wheel
1150 cylinders 12:1 pistons/ race cams, Lennies induct, Laser Boxercup II Exhaust, Ohlins shocks, Dymag Carbon Fiber Five Spoke wheels, Crossover tube removed, heads ported and polished Bigger valves installed intake and exhaust! SJ power filter, motoyoyo clamps , HID
Old 05-31-2007, 07:06 PM
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