Exhausts and Engine » Hard starting

R1200RS + R1250RS Forum � 1250 RS technology � Exhausts and Engine � Hard starting

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#1 | Hard starting datum

Sat Sep 02, 2023 5:50 am

First! The issue was fixed, under warranty, even though 3 year warranty had expired on my 2019 R1250 RS. Thank you Doncaster BMW!

From time to time the RS would not crank. Typically after riding for at least 20 minutes. Commonly it would happen after refuelling. The starter engaged, but the motor would only manage 1 or 2 compressions. It became progressively worse. Ended up replacing the battery although my tester said it remained good.
With new battery, it failed to start again. Jump start battery at the servo did not work. Whole electrical system shut down. Random error messages on the TFT and then it turned itself off. Multiple times.
After 20 minutes it restored itself and I was able to ride it to the dealer.
Opinion was the valve clearances were witin spec, but they were adjusted to minimum clearance as it was considered the decompression device was not working, and a 627 cc pot is just too much for the starter without decompression.
After resetting the clearances, it has worked without fault.

I would like to apologize to anyone I have NOT offended. Please be patient. I will get to you shortly.

these members like the post: Becksy and Ray B

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#2 | RE: Hard starting datum

Sat Sep 02, 2023 5:22 pm

Amazing.

Ray B likes the post

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#3 | RE: Hard starting datum

Tue Nov 21, 2023 11:58 am

I have this issue now, bike is going into the dealer next week. The bike was serviced on the 19th September and since then it frequently refused to start, like it had flat battery, this has happened the odd time before in my 2 years ownership but has never been a problem until now.

What is happening now besides the no start are the error messages now appearing, the complete shutdown of the bike and the now unresponsive start button.

After a time switching on and off it fixes itself.

Hopefully related to valve clearances like yours and the battery

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