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Author Topic: Bmw F650 Dakar Engine Repair  (Read 333 times)

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Offline awdippenaar123

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Bmw F650 Dakar Engine Repair
« on: June 09, 2021, 10:29:04 am »
Good morning everyone

I've got the opportunity to get a hold of a Bmw F650GS Dakar with 80000km at a very good price. Owner says it needs a new battery and something does not sound well with the engine but it runs. They do not seem to know what could be the issue. I just want an indication as i am new to the GS game, as to anyone thinks i should go for the deal and fix it up.

And also for worst case scenario if the engine is fried how much would it cost to get it running well again?

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Re: Bmw F650 Dakar Engine Repair
« Reply #1 on: June 09, 2021, 10:32:14 am »
Timing chain?
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Offline blockheadxl650v

Re: Bmw F650 Dakar Engine Repair
« Reply #2 on: June 09, 2021, 10:35:53 am »
That's a difficult question to answer. Why don't you get a battery and start it and then try and make a decision from there. There are a few guys in the western cape that have a lot of 2nd hand spares for them. Unfortunately I don't have there numbers but they advertise on facebook Market place.
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Offline awdippenaar123

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Re: Bmw F650 Dakar Engine Repair
« Reply #3 on: June 09, 2021, 10:36:35 am »
It probably could be the timing chain. I haven't gone to see the bike as I don't want to waste my time hence me first getting some input. But as i saw from other posts the 650's are quite reliable but i just want to get someone elses inputs.
 

Offline blockheadxl650v

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Offline Black_Hawk

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Offline WillemInsit

Re: Bmw F650 Dakar Engine Repair
« Reply #6 on: June 09, 2021, 11:05:59 am »
2nd Hand parts are available, if it starts and makes a noise, might be the tensioner, R1800 etc
 
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Offline Ragbert

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Re: Bmw F650 Dakar Engine Repair
« Reply #7 on: June 09, 2021, 12:54:46 pm »
These Rotax motors are built proof, mine is on 110k km's and sounds almost like new. These bikes are very temperamental with regards to battery related issue. Ensure the battery is fully charged and in good condition, secure the terminals properly. Start and observe. Do you know the year model? Twin spark vs single spark?
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Offline Black_Hawk

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Re: Bmw F650 Dakar Engine Repair
« Reply #8 on: June 09, 2021, 01:13:18 pm »
These Rotax motors are built proof, mine is on 110k km's and sounds almost like new. These bikes are very temperamental with regards to battery related issue. Ensure the battery is fully charged and in good condition, secure the terminals properly. Start and observe. Do you know the year model? Twin spark vs single spark?

I agree on this one. We just sold my wife's Dakar with 130 000km on the clock and the bike was still running like a swiss watch.

I think the bike that he is referring to is a 2006 model. I saw a add on Gumtree with almost the same wording / issues, so I assume that it's the bike that he is talking about.
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Offline ClimbingTurtle

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Re: Bmw F650 Dakar Engine Repair
« Reply #9 on: June 09, 2021, 02:29:48 pm »
Go have a look at it - if it starts and idles OK, you are already onto something - check all the obvious - water in the oil, oil in the water, check oil levels, look for leaks - especially water pump leaking (bottom left on motor), if there is weeping, you are in for a water-pump, but tbh, I would do this anyway, its a wear part...., Check spark plugs (if possible), look for leaking shocks, all the usual. Oh - rattling on the head is usually the gaps on the cams, easy fix, but when they get out of spec, the bike is hard to start and idles badly.
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Offline Bill the Bong

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Re: Bmw F650 Dakar Engine Repair
« Reply #10 on: June 09, 2021, 06:20:36 pm »
Im going to be more negative. You might need new spares. I look after a couple of F800GSs for clients. Anything new is expensive and often on back order. What do you consider to be a good price?
 

Offline Jughead

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Re: Bmw F650 Dakar Engine Repair
« Reply #11 on: June 15, 2021, 10:25:17 am »
If it is a 2006 it will be twin spark.  If the outer sitck coil is buggered, the motor will still run fine.  If, however, the inner stick coil is gone, the motor will idle but sound terrible.  You will be able to ride it, but only at about 20 or 30 km/h.  Faster than that it will not go.

I have had 2 clients that swore blind they needed motor rebuilds when all it was was the inner stick coil.

Easy enough to check.  Just swap the 2 coils around.  They won't fit correctly, but will be good enough just to test.
« Last Edit: June 15, 2021, 10:26:29 am by Jughead »
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Offline Rufus115

Re: Bmw F650 Dakar Engine Repair
« Reply #12 on: June 15, 2021, 04:44:58 pm »
If it is a 2006 it will be twin spark.  If the outer sitck coil is buggered, the motor will still run fine.  If, however, the inner stick coil is gone, the motor will idle but sound terrible.  You will be able to ride it, but only at about 20 or 30 km/h.  Faster than that it will not go.

I have had 2 clients that swore blind they needed motor rebuilds when all it was was the inner stick coil.

Easy enough to check.  Just swap the 2 coils around.  They won't fit correctly, but will be good enough just to test.

You cant by advise like that!
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