ducati 916 power loss

Drrty · October 25th, 2012, 12:19 AM

Hey guys!
Thought I'd pick your collective brains for some ideas. When I go to start the bike, it starts up first try. Has no problems at cold temps. Runs like hell is chasing it.
When it gets up to operating temps then it lets hell catch up. It will occasionally die when sitting at idle. Bogs down when I twist the throttle (except at high RPMs) and loses power. The headlights do dim when I use the brakes or the turn signals. Also, the RPM gauge goes up about 100 rpm every time the turn signal flashes then drops back down, then goes up again when it comes back on.
The two things I thought it might be were bad battery or rectifier. Any ideas?

All stock except for Arrow carbon fiber exhaust, power commander and over the injectors air filter, related to motor.

Slower than you · October 25th, 2012, 11:53 AM

Check the charging rate. Put a volt meter across the battery and check that the voltage is over 14 when over 4000 rpm.

Drrty · October 25th, 2012, 03:56 PM

Will do. Thanks much mate.
PS: Yay for a non liberal!

Drrty · November 1st, 2012, 12:24 AM

So, battery is fine. Just changed spark plugs and resealed the air box. Sometimes I wish it wasn't the R model so I didnt have to deal with the insane air box seal! Hehe, anyways, still having the same issue. Battery is fine and charging. Wondering if it could possibly be the balance of the throttle bodies? Perhaps theyre off enough that when the bike revs down there's still a large discrepancy between the Tbs

Drrty · November 10th, 2012, 01:54 AM

Super helpful =/

juan1 · November 10th, 2012, 08:04 PM

how can you have over the inj filter with the shower injection are you sure is an R??

Drrty · November 10th, 2012, 11:50 PM

What do you mean? The injectors spray into the throttle bodies via shower set up. I don't understand the question.

Drrty · November 10th, 2012, 11:50 PM

Nope, now I understand. It's a filter that fits over the entire assembly. Like a cap.

juan1 · November 11th, 2012, 06:07 AM

what im saying is that all the R have shower injector set up and i never seen a filter that big that fits over the set up can you please take a pic so i could see it?

Drrty · November 11th, 2012, 09:04 AM

Sure. I ended up not putting it on. Figured it was kinda redundant.

October 25th, 2012, 12:19 AM	#1
Drrty Member ducatis in the registry: [748 R] [748 R] [view ducati.org album] Join Date: Oct 2012 Location: Arizona Posts: 81	748R dying when hot, loss of power. Hey guys! Thought I'd pick your collective brains for some ideas. When I go to start the bike, it starts up first try. Has no problems at cold temps. Runs like hell is chasing it. When it gets up to operating temps then it lets hell catch up. It will occasionally die when sitting at idle. Bogs down when I twist the throttle (except at high RPMs) and loses power. The headlights do dim when I use the brakes or the turn signals. Also, the RPM gauge goes up about 100 rpm every time the turn signal flashes then drops back down, then goes up again when it comes back on. The two things I thought it might be were bad battery or rectifier. Any ideas? All stock except for Arrow carbon fiber exhaust, power commander and over the injectors air filter, related to motor. __________________ 2000 748R Arrow carbon fiber exhaust. Misc. Carbon Fiber. Troy Bayliss fairings. Scotts Steering damper/triple clamp. Rosso 2 tires. STM Evolutizone slipper clutch. PSR sprocket cover. Duca clutch cover. PC3 w/ custom mapping. Ride Smart. Ride Safe. Ride for fun.

October 25th, 2012, 11:53 AM	#2
Slower than you Senior Member ducatis in the registry: [998] Join Date: Feb 2008 Location: Wisconsin USA under duress Posts: 2,929	Check the charging rate. Put a volt meter across the battery and check that the voltage is over 14 when over 4000 rpm. __________________ If you want to make a Conservative mad, tell him a lie. If you want to make a Liberal mad, tell him the truth.

October 25th, 2012, 03:56 PM	#3
Drrty Member ducatis in the registry: [748 R] [748 R] [view ducati.org album] Join Date: Oct 2012 Location: Arizona Posts: 81	Will do. Thanks much mate. PS: Yay for a non liberal! __________________ 2000 748R Arrow carbon fiber exhaust. Misc. Carbon Fiber. Troy Bayliss fairings. Scotts Steering damper/triple clamp. Rosso 2 tires. STM Evolutizone slipper clutch. PSR sprocket cover. Duca clutch cover. PC3 w/ custom mapping. Ride Smart. Ride Safe. Ride for fun.

November 1st, 2012, 12:24 AM	#4
Drrty Member ducatis in the registry: [748 R] [748 R] [view ducati.org album] Join Date: Oct 2012 Location: Arizona Posts: 81	So, battery is fine. Just changed spark plugs and resealed the air box. Sometimes I wish it wasn't the R model so I didnt have to deal with the insane air box seal! Hehe, anyways, still having the same issue. Battery is fine and charging. Wondering if it could possibly be the balance of the throttle bodies? Perhaps theyre off enough that when the bike revs down there's still a large discrepancy between the Tbs __________________ 2000 748R Arrow carbon fiber exhaust. Misc. Carbon Fiber. Troy Bayliss fairings. Scotts Steering damper/triple clamp. Rosso 2 tires. STM Evolutizone slipper clutch. PSR sprocket cover. Duca clutch cover. PC3 w/ custom mapping. Ride Smart. Ride Safe. Ride for fun.

November 10th, 2012, 01:54 AM	#5
Drrty Member ducatis in the registry: [748 R] [748 R] [view ducati.org album] Join Date: Oct 2012 Location: Arizona Posts: 81	Super helpful =/ __________________ 2000 748R Arrow carbon fiber exhaust. Misc. Carbon Fiber. Troy Bayliss fairings. Scotts Steering damper/triple clamp. Rosso 2 tires. STM Evolutizone slipper clutch. PSR sprocket cover. Duca clutch cover. PC3 w/ custom mapping. Ride Smart. Ride Safe. Ride for fun.

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November 10th, 2012, 08:04 PM	#6
juan1 Senior Member ducatis in the registry: [1198] [748] Join Date: Jun 2010 Location: north nj Posts: 345	how can you have over the inj filter with the shower injection are you sure is an R??

November 10th, 2012, 11:50 PM	#7
Drrty Member ducatis in the registry: [748 R] [748 R] [view ducati.org album] Join Date: Oct 2012 Location: Arizona Posts: 81	What do you mean? The injectors spray into the throttle bodies via shower set up. I don't understand the question. __________________ 2000 748R Arrow carbon fiber exhaust. Misc. Carbon Fiber. Troy Bayliss fairings. Scotts Steering damper/triple clamp. Rosso 2 tires. STM Evolutizone slipper clutch. PSR sprocket cover. Duca clutch cover. PC3 w/ custom mapping. Ride Smart. Ride Safe. Ride for fun.

November 11th, 2012, 06:07 AM	#9
juan1 Senior Member ducatis in the registry: [1198] [748] Join Date: Jun 2010 Location: north nj Posts: 345	what im saying is that all the R have shower injector set up and i never seen a filter that big that fits over the set up can you please take a pic so i could see it?

November 11th, 2012, 09:04 AM	#10
Drrty Member ducatis in the registry: [748 R] [748 R] [view ducati.org album] Join Date: Oct 2012 Location: Arizona Posts: 81	Sure. I ended up not putting it on. Figured it was kinda redundant. __________________ 2000 748R Arrow carbon fiber exhaust. Misc. Carbon Fiber. Troy Bayliss fairings. Scotts Steering damper/triple clamp. Rosso 2 tires. STM Evolutizone slipper clutch. PSR sprocket cover. Duca clutch cover. PC3 w/ custom mapping. Ride Smart. Ride Safe. Ride for fun.

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