My Dark White has that same ,,,,struggle..at start up . The battery in mine is a Yuasa YTX14-BS and was in Acey
when I bought him a year ago .
Anyone else have that ...struggle..at start up ?
Yep! my 2011 R1200R [39,000klm] has always had a sluggish start [compared to my "K"] and I've never thought much of it untill I too stopped for fuel. Turned the key pushed the button, nothing. Had indicators and horn ??? Got a lift to nearby battery retailer AUS $110, back to the bike installed the new battery. Still won't turn over. Trailered home and pulled the Starter motor out and dissmantled it only to find that the spring which hold the brushed onto the commutator were now 4 different lengths. Heat caused them to loose their "spring".
After MANY hours on the web and phone calls to BMW & Bosch - starter motor manufacture I contacted BOSCH Germany and they kindly gave me the updated replacement part number for the Brush Assemberly: 1 004 336 506 they are still available in Europe.
BMW will sell you a Starter Motor for Aus $196.96. The brush assemberly will cost approx [inc freight] EUR 26
I have put the old battery back in the bike and have the new YUASA on a trickle charge waiting...
NB
if your battery needs constant charging; 1. chech the charge rate of the Alternator. Belt should be changed at 40,000klm 2, have the battery Load Tested, to check its internal condition.