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Author Topic: 1997 BMW F650 ST Bluebird - Repair, maintain, ride.  (Read 9222 times)

Offline advCo

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Re: 1997 BMW F650 ST Bluebird - Repair, maintain, ride.
« Reply #40 on: Oct 05, 2018, 13:13:08 »
Well, no luck on that "fix"

Its running super lean at idle. Won't go beneath 2k RPM and still backfiring through the airbox so its gotta still be leaking vacuum somewhere either in the carbs or the intake manifold.

There were some cracks inside the intake boot where the lip of the carb seats, but nothing on the outside. No used intake manifolds available and new is $127.


Offline canyoncarver

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Re: 1997 BMW F650 ST Bluebird - Repair, maintain, ride.
« Reply #41 on: Oct 05, 2018, 16:39:04 »
Liquid electrical tape.

Offline advCo

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Re: 1997 BMW F650 ST Bluebird - Repair, maintain, ride.
« Reply #42 on: Oct 05, 2018, 17:38:44 »
Liquid electrical tape.

Hmm. Probably worth a shot. I wonder if that stuff can tolerate the heat? Stuff I looked up on Amazon had a heat tolerance up to 175*F.

Offline trek97

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Re: 1997 BMW F650 ST Bluebird - Repair, maintain, ride.
« Reply #43 on: Oct 05, 2018, 17:39:54 »
 Maybe.
Plasti-dip is good for 200 degrees on their website
« Last Edit: Oct 05, 2018, 17:51:50 by trek97 »

Offline trek97

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Re: 1997 BMW F650 ST Bluebird - Repair, maintain, ride.
« Reply #44 on: Oct 05, 2018, 17:51:20 »
Plasti-dip also makes Re-rack.  A fix for dishwasher racks...but don’t give a heat tolerance.

Offline Maritime

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Re: 1997 BMW F650 ST Bluebird - Repair, maintain, ride.
« Reply #45 on: Oct 06, 2018, 11:25:22 »
Get the self fuzing tape its silisone, hi heat and fuel safe. Wrap that around all thw rubber it will sealmit all and stay pliable.
The GL Rebirth: http://www.dotheton.com/forum/index.php?topic=68337.0
CX500 Low budget Bobber : http://www.dotheton.com/forum/index.php?topic=43617.0
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Offline Brodie

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I'm not sure, but don't ask Brodie.

Way to many build and half done projects to list here.
Sr250, Gs750, Z50A, XV1100, A10, Z160A.

Offline advCo

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Re: 1997 BMW F650 ST Bluebird - Repair, maintain, ride.
« Reply #47 on: Oct 08, 2018, 13:03:56 »
Ordered some of the self-fusing tape from Matt. Will wrap the intake boot up as well as I can and see how it fares. If it improves or fixes the issue I'll go ahead and order a new intake boot.

Will report back.

Offline irk miller

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Re: 1997 BMW F650 ST Bluebird - Repair, maintain, ride.
« Reply #48 on: Oct 08, 2018, 13:46:30 »
Intake boots get too hot for self fusing tape.  It'll last a few days, tops.
 *unless it's Pyrosil

Offline irk miller

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Re: 1997 BMW F650 ST Bluebird - Repair, maintain, ride.
« Reply #49 on: Oct 08, 2018, 14:05:20 »
Also, don't forget, these carbs are unfortunately prone to have issues if the air box isn't in perfect condition.  You can be lean because of the air box side, not just leaky intakes.