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Registered
Join Date: Oct 2001
Location: Round Rock (Austin), TX, USA
Posts: 1,212
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11S is way down on power in upper rev range. suggestions?
My, new to me, 2004 R1100S has not been running well since I've taken ownership.
Symptom: It has plenty of torque low in the RPM range up to about 5K RPM and then hits a serious flat spot from there on up. If, at 5K RPM, I whack the throttle open, there is an increase in the intake noise but very little acceleration. I've tried several things, mostly the easy things that I was going to do anyway, to no avail. I'd very much appreciate your collective experience / guidance since the future list is more involved. So far I've:
On my list of to be investigated potential causes:
Am I missing any? Electrical components? Any suggestions on how to best diagnose or eliminate potential causes? From your experience, which are the most probable?
__________________
Paul. '11 R1200RT, '09 Buell 1125cr, '08 Suzi SV650A, '00 Suzi SV650, '97 328i (with sticky ass tires - I love this car). And the bikes I used to own: '68 Bultaco 100, '69 Honda CL450, '71 Kawasaki Mach III, '71 OSSA Pioneer, '72 Honda MR175, '72 Benelli 250, '75 Yamaha RD350 (then college), '83 Honda VF750F (then kids),'96 MZ Skorpion, '99 R1100S, '01 SV650, '94 Honda VFR750F and '04 R1100S w/Öhlins an' stuff, most wrecked. Last edited by pwillikers; 07-26-2013 at 11:33 AM.. |
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07-26-2013, 11:24 AM
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unsafe at any speed
Join Date: Dec 2003
Location: Arkansas
Posts: 12,327
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double check cam timing. previous owner may have messed with it.
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07-26-2013, 11:34 AM
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Registered
Join Date: Oct 2001
Location: Round Rock (Austin), TX, USA
Posts: 1,212
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Thanks Bill. The PO bought it new and had the dealer do all the service, even oil changes. Hence, cam timing changes are unlikely. In any event, I'll put it on the list.
Given the symptom, which of the list of potential causes do you think the most likely?
__________________
Paul. '11 R1200RT, '09 Buell 1125cr, '08 Suzi SV650A, '00 Suzi SV650, '97 328i (with sticky ass tires - I love this car). And the bikes I used to own: '68 Bultaco 100, '69 Honda CL450, '71 Kawasaki Mach III, '71 OSSA Pioneer, '72 Honda MR175, '72 Benelli 250, '75 Yamaha RD350 (then college), '83 Honda VF750F (then kids),'96 MZ Skorpion, '99 R1100S, '01 SV650, '94 Honda VFR750F and '04 R1100S w/Öhlins an' stuff, most wrecked. |
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07-26-2013, 11:59 AM
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Registered
Join Date: Jan 2010
Location: Houston, Texas
Posts: 289
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Two Words
Stick coil.
Had the same exact problem with my '04 R1100S a few months ago. Another forum reader out of Chicago with a R1200S had the same issue you had about six months ago. Stick coil replacment. He is happy. |
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07-26-2013, 01:06 PM
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Registered
Join Date: Nov 2004
Location: Tampa, FL
Posts: 1,036
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Sounds like a coil problem to me as well. On a previous bike I had a similar intermittent power loss that would on present after riding for a while and the coil got hot.
__________________
You will have the rest of your life to remember. But what you have to remember depends on what you do today. Current ride - 2007 BMW R1200S Past bikes/sold - 1999 BMW R1100S/1994 Honda VFR 750/1989 Suzuki Katana 750/1982 Suzuki Katana GS1000SZ |
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07-26-2013, 01:16 PM
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unsafe at any speed
Join Date: Dec 2003
Location: Arkansas
Posts: 12,327
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low fuel pressure is a possibility. had a r1100r in my shop with same symptoms. fuel filter split open at the seam.
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07-26-2013, 02:36 PM
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unsafe at any speed
Join Date: Dec 2003
Location: Arkansas
Posts: 12,327
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wouldnt hurt to check intake for an obstruction like a bird nest
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07-26-2013, 03:57 PM
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Brent
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I had a 04 with 3 bad coils that still ran.
not well though |
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07-26-2013, 07:02 PM
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Top of the Valley
Join Date: Jul 2004
Location: Maine
Posts: 1,572
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Quote:
__________________
Post quality rating of .01792 or less. 2010 K1300S |
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07-26-2013, 07:04 PM
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Registered
Join Date: Oct 2001
Location: Round Rock (Austin), TX, USA
Posts: 1,212
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Thank you gentlemen for your kind assistance and suggestions.
I started the engine and let it idle and pulled the plug wires in succession. The right side primary plug wire had no effect whether attached or detached. Bad stick coil. Very easy diagnosis. I had assumed the failure mode would be intermittent but apparently when these coils fail, they fail completely and the secondary plug keeps it running, sort of, and masks the failure. Lone Star BMW, my local dealer, had one in stock. I bought and installed it and this baby is now running nice and smooth.  All's good in TX (excepting our Governor).
__________________
Paul. '11 R1200RT, '09 Buell 1125cr, '08 Suzi SV650A, '00 Suzi SV650, '97 328i (with sticky ass tires - I love this car). And the bikes I used to own: '68 Bultaco 100, '69 Honda CL450, '71 Kawasaki Mach III, '71 OSSA Pioneer, '72 Honda MR175, '72 Benelli 250, '75 Yamaha RD350 (then college), '83 Honda VF750F (then kids),'96 MZ Skorpion, '99 R1100S, '01 SV650, '94 Honda VFR750F and '04 R1100S w/Öhlins an' stuff, most wrecked. |
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07-27-2013, 04:46 AM
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Honda GL1000 current ride
Join Date: Dec 2007
Location: Headed to Nashville
Posts: 735
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yeah Texas, oh yeah tell us about the Chisolm Trail please..
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07-27-2013, 06:36 AM
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