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Author Topic: 1997 BMW F650 ST Bluebird - Repair, maintain, ride.  (Read 10583 times)

Offline irk miller

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Re: 1997 BMW F650 ST Bluebird - Repair, maintain, ride.
« Reply #50 on: Oct 08, 2018, 15:47:52 »
Just to be sure:  Did you thread the crank lock in when you pulled the top end to rebuild it?


Offline advCo

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Re: 1997 BMW F650 ST Bluebird - Repair, maintain, ride.
« Reply #52 on: Oct 08, 2018, 15:54:57 »
Just to be sure:  Did you thread the crank lock in when you pulled the top end to rebuild it?

Yessir. Checked and double checked cam alignment, turned motor over a few times and checked it again.

Also, make sure you've been here: http://faq.f650.com/FAQs/BackfiringFAQ.htm#Airbox%20to%20Exhaust%20Header%20Line

Been through there a few times. I am convinced I need to deal with the intake boot before moving on, as spraying starter fluid around the intake boot caused surging. That and the high idle condition lead me to believe it is an issue on the intake side rather than exhaust gaskets etc, most of which I have checked.

Offline advCo

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Re: 1997 BMW F650 ST Bluebird - Repair, maintain, ride.
« Reply #53 on: Oct 22, 2018, 10:42:23 »
Nothing super exciting to report. I pulled the carbs completely apart for the 100th time and went through them with a super fine tooth comb. Threw the bodies in the ultrasonic cleaner, along with the brass. Replaced all 4 o-rings in each carb. I noticed that the PO had placed the plastic spacers on the needles above the circlip, rather than below (toward the slide body). So I reassembled those correctly. Set float heights to 14.6mm and set the mixture screws to the stock setting 3.5 turns out.


Offline Hurco550

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Re: 1997 BMW F650 ST Bluebird - Repair, maintain, ride.
« Reply #54 on: Oct 22, 2018, 13:27:00 »
I hope that's all it needed man. TIME TO RIDE!
"If you want safety and sanity don't mess around with choppers to begin with and don't come crying to me for recommending something that broke down the line. You're going to be the "builder" so use your own judgment and build to you own personal levels of safety and sanity." - Chopper Handbook
1988 tw200, the swamp donkey: http://www.dotheton.com/forum/index.php?topic=75455.0
1975 RD350 Road Racer: http://www.dotheton.com/forum/index.php?topic=70652.msg833688#msg833688
1976 GT250 Rebuild: http://www.dotheton.com/forum/index.php?topic=64973.new#new
Full Custom Pit Bike: http://www.dotheton.com/forum/index.php?topic=66954.new#new
"much ingenuity with a little money is more profitable and amusing than much money without ingenuity" - Arnold Bennet

Offline advCo

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Re: 1997 BMW F650 ST Bluebird - Repair, maintain, ride.
« Reply #55 on: Oct 24, 2018, 09:43:38 »


She’s running great after the thorough go-round with the carbs. I’m sure it was a combination of the incorrectly assembled needle spacers and crusty old o-rings.

Next up is to address the chatter in the clutch. I pulled the left side cover off again and removed the clutch assembly for inspection. I checked all the fiber discs and pressure plates on a flat surface, and everything looked great. They were pretty sticky as there was hardly any oil between a lot of the plates. It’s been a few years since this bike has moved under its own power so that’s not surprising.

I wiped everything down, generously oiled up all the discs and reassembled. Clutch springs all measured right where they should be. I need to grab the correct moly grease for the clutch activator rack & pinion, then I’ll slap everything back together and test it again.

I drained the oil before pulling the side cover, there was a tiny bit of residual crap in the bottom of the OIF tank from the leaky head gasket, but no more nasty chocolate milk oil!


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Offline JustinLonghorn

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Re: 1997 BMW F650 ST Bluebird - Repair, maintain, ride.
« Reply #56 on: Oct 24, 2018, 09:58:43 »
My man!
I'm going to eat your brains and gain your knowledge.

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Offline Maritime

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Re: 1997 BMW F650 ST Bluebird - Repair, maintain, ride.
« Reply #57 on: Oct 24, 2018, 10:06:05 »
Nice work!
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Offline Hurco550

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Re: 1997 BMW F650 ST Bluebird - Repair, maintain, ride.
« Reply #58 on: Oct 24, 2018, 10:28:34 »
 Awesome dude!

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"If you want safety and sanity don't mess around with choppers to begin with and don't come crying to me for recommending something that broke down the line. You're going to be the "builder" so use your own judgment and build to you own personal levels of safety and sanity." - Chopper Handbook
1988 tw200, the swamp donkey: http://www.dotheton.com/forum/index.php?topic=75455.0
1975 RD350 Road Racer: http://www.dotheton.com/forum/index.php?topic=70652.msg833688#msg833688
1976 GT250 Rebuild: http://www.dotheton.com/forum/index.php?topic=64973.new#new
Full Custom Pit Bike: http://www.dotheton.com/forum/index.php?topic=66954.new#new
"much ingenuity with a little money is more profitable and amusing than much money without ingenuity" - Arnold Bennet

Offline irk miller

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Re: 1997 BMW F650 ST Bluebird - Repair, maintain, ride.
« Reply #59 on: Oct 24, 2018, 11:00:45 »
This is why mine has dual TM34 carbs.  Fuck these sensitive jawns.