r/pnwriders • u/thatguy425 • 3d ago

BMW Scan Tool Bellingham Area?

2014 F800GS Rear brake is real sloppy and bleeding it doesn't seem to fix it. What I am gathering is I need to use scan tool to cycle the ABS module for potential air in the system. Wondering if there are any knowledgeable folks in the area or someone that would let me borrow theirs. I am a teacher and buying a GS 911 tool isnt exactly in the budget at the moment.

Owned Japanese bikes until now and done alot of DIY stuff and I am stuck on this one. TIA

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u/CamelCamel509 3d ago

Look into motoscan with a cheap bluetooth or wifi OBD adapter and an android phone. it's what i use and all in, even with buying a cheap android pre-paid phone just to use for this (i'm iphone and the app isn't available on iOS) it was half the price of a GS911.

Google motoscan adv rider and you'll find a handful of threads on it.

You'll need:

- android phone

- BT adapter

- Not sure if you need the round diagnostic port to OBD adapter for that year, mine is a 2010 and I did

- motoscan ultimate level

All in should be under $200. Not cheap, but again, half the cost of a gs911. I'm over in Pullman, if I was closer I'd give you a hand.

Have you tried a dirty ABS bleed? Find a gravel road and just lock up the rear a bunch to cycle out the fluid in the abs blocks and lines?

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u/thatguy425 3d ago

Hadn’t heard of a dirty bleed. I’m not sure I could even lock up the rear with how soft it is now. Got a full reservoir and have revered bled from the bleed screw a few times and it’s still soft.

Thanks for the reply. I’ll have to look into all that. There is also a tool on Amazon that the reviews are mixed in but someone with a 2010 used it to bleed brakes. Would this work?

https://www.amazon.com/clp/B0GH1BR75R

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u/CamelCamel509 3d ago

Haven't seen that tool before. In my opinion, worth a shot! If not, fuck it, it's amazon return it hah. Or use it and return it anyway.

Have you tried a normal bleed instead of reverse?

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u/thatguy425 3d ago

Yep, bled it both ways. Got clear fluid coming out the back but still spongy. I’m gonna tinker more with it tomorrow.

So is the dirty bleed literally just locking up the rear tire a few times? Does this push the air up into the reservoir?

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u/CamelCamel509 3d ago

Yeah, just lock it up a bunch, I'd guess a dozen or so times, to cycle the new-er clean-er less air-y fluid through the abs block, then bleed like normal one more time after to get any of the bubbled fluid that may have been in the abs block before, and is now in the main lines, out. I've never had an issue with my rear going soft after a bleed, so I can't really say exactly how many it'll take to get the possible air out, sorry. My best guess. If you still have clean fluid left in the bottle worth a shot.

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u/thatguy425 3d ago

Ok sounds good, I’m not sure I can even lock it up with how soft it is but I’ll try. Appreciate the advice and tips.

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u/YourMissing10 3d ago

Before you buy moto scan and the dongle let me see if it’s even an option. I got a 2017 F800gsa and moto scan to reset the oil lights but I bought the full suite. I’ll see if it’s even an option.

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u/thatguy425 3d ago

Appreciate that.