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Old 10-23-2012, 10:39 AM   #16
Bill Harris
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Quote:
Originally Posted by photorider
Next, the mixture screw. Our carbs are different than the CV Bings most other BMW's have.
And remember, the mixture screw is actually an air screw in that it regulates the air into the idle mixture with the fuel being set by the idle jet, and it works oppositely compared to a fuel mixture screw-- turn-in= richer turn-out=leaner

Quote:
Originally Posted by motocyco
I don't run premium but all the pinging has been at low rpm and big throttle.
That is where pinging is supposed to occur--low rpm/big throttle.

You need to run Premium-- the bike was designed for that grade of gas. If you want/need to run regular, you need to install low-tes base gaskets to lower the compression ratio.

--Bill
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Old 10-23-2012, 11:33 AM   #17
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I need to fill up on the way home. Guess I it's a good time to switch to premium.
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Old 11-08-2012, 04:01 PM   #18
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Parts finally arrived today. Hopefully I can get some time over the holiday weekend to wrench on the R60.
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Old 11-12-2012, 01:20 PM   #19
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Today I got a chance to work on the bike. Changed and adjusted the floats, changed the needles, re-balanced the carbs, and played with the idle mixture screw again. I think the floats were too low. Not sure the mixture is right, I should probably re-read the procedure and try again.

I only got out for a short test ride, so I won't get a better idea how much it has changed until I can get in a longer ride. Maybe on the ride to work tomorrow. However, my seat-of-the-pants dyno says it runs better. I ran 75 for about half a mile without any trouble, but it still seems like it's screaming it's heart out. Acceleration felt a little better; faster than an XT225 but definitely slower than an 883.
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Old 11-12-2012, 02:07 PM   #20
disston
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I didn't know the Mix Screw on an R60/6 was actually an Air Screw. I have no experience with the smaller motors but I have a Bing manual. I thought I would give you some of the info in their manual. You may at some future date wish to change things but it is helpful to know what Bing says.

The carb numbers on an R60/6 are......1/26/123 & 124

They are type... 53 carbs

Main Jet is...140

Needle Jet is...2.68

Idle Jet is...40

Jet Needle is...234

Clip position is...2

Idle Mix Setting is...1

Good Luck with it.
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