Power

[fouramdesigns]

I've had my bike now for almost a year, a daily driver, sold the car. I spend a lot of time with this bike. Do most maint myself. I've had the bike in two shops, the most recent I feel very confident in. But my bike just does not seem has fast as it did. A few times the CO has been off. And excuse my ignorance, I'm not entirely familar with the total fuel system, but I feel like there's a unresolved issue that keeps causing performance to change. The bike use to accelerate fast and hard, it now feels it takes a few secs to kick in, also seems not to rev as hard, like the engine is giving out sooner. All I can go by is past experience, my daily rides, and of course, sounds. I'm an audio engineer, and the bike just doesn't sound the same. At the 12K/base gasket, I had all filters replaced, throttles syched etc. They said all looked well. But the throttle link,  at the body was a bit sticky, we lubed it. Also replaced the cable. I just don't have money to keep throwing away, chasing a problem. Just curious if anyone else has experienced a similar issue. Even considered the fact that maybe I've just gotten use to the bike. I read somewhere once that an S4 set up like mine has 120wrhp, sure doesn't feel like it.

[Speeddog]

If your sig line is up to date, here's some data on what an S4 with that setup does on a dyno:
http://www.bikeboy.org/monsters4_perfkit.html

Basically, 105 HP.
As usual, YMMV, as dynos differ.

The recent replacement of all the filters eliminates them as suspects.

Do you have the OEM ECU to try?

[fouramdesigns]

no just the Termi. Maybe the shop can loan me one

[Speeddog]

Pretty sure it wouldn't work due to the immobilizer, but '01 S4s seem to be more tolerant, so it may be worth a try.

[fouramdesigns]

crap is driving me crazy. I love my bike, but geesh. I found a bike co-op here in Nashville, may see what some of the veterans can suggest.

[scott_araujo]

In addition to a full tune up (CO set, iilde set, TPS reset, TB synch, fuel & air filters, valve clearance set, oil & filter) you may want to do a compression check and get the cams degreed.  If that's all in order and nothing looks off, is it possible you're just getting used to the power?

Scott

[fouramdesigns]

In addition to a full tune up (CO set, iilde set, TPS reset, TB synch, fuel & air filters, valve clearance set, oil & filter) you may want to do a compression check and get the cams degreed.  If that's all in order and nothing looks off, is it possible you're just getting used to the power?

Scott

I know all but the comp test and cams degree'd were done. May be time for that KTM Super Duke R...yes sir

[scott_araujo]

Wow, sad times when a Termi equipped S4 v-twin doesn't have enough torque.  Too bad there's no 12 step program for Ducati addiction. 

Scott

[fouramdesigns]

I love my Duc, but I love speed and my neck snap more. Maybe the bike just needs a few tweaks. I would never part with her, least not now I have 8K in her, and the market is so sour.

[greenmonster]

You have another thread were horn affects tach.
Combined it sounds electrical/ECU related.
Battery/charging OK f e?
All earth connectors good?

[fouramdesigns]

well like I posted in the other, the bike has been wonky on start. It's the battery that came with the bike, a Bike Master or something. May be time for a Yusa. Today, when I turned the key to lock, someone at work told me my lights were still on, weird. I'll track a Yusa down, see if it helps these issues. I need a new one anyway, the mechanic said the trickle charge was showing it really low. And the lights look dim on the gauges.

[scott_araujo]

One tiny notch past lock is park, which is park with the lights on.  This will drain your battery.

Scott

[fouramdesigns]

One tiny notch past lock is park, which is park with the lights on.  This will drain your battery.

Scott

lmao. I was late and in a hurry this morning. This all started a month ago, I got a flat, left the lights on while I was on the roadside, battery was drained, shop trickle charged, he said it looked pretty low. Cheap battery to begin with, I'm sure it's time for a new one.

[Howie]

If you want to confirm the battery is bad, fully charge it and have a shop load test it.  If you want to replace it just for the hell of it, that is fine too.  A weak battery and electronic fuel injection can cause some strange symptoms, and changing a battery prematurely is not a bad idea.

[fouramdesigns]

thanks for the input. Another odd issue I forgot to mention. When filling up, I start the bike, it backfires, a pop that seems at times to come from the throttle body. Only does this after I've filled up.