My new ducati! (some questions)

[Slide Panda]

Where did you buy this bike in Houston?

Where'd you get Huston from?  He got it some place in Ohio, from a private (dick bag) seller

[karrotx]

Well I got the bike back from Ducpond.

I brought them a motor, they did a full 12k service (even though the motor has 4500 on it), and installed. They gave me a good price.

But...this new motor has a surging problem at 3500-4k. Also, if I'm in 1st at 5000+ it'll surge. It's very make the beast with two backsing irritating. Is this just the bike? I'm going to get a dyno run on Tuesday or next Saturday. Should I buy an exhaust and ECU flash? Should I look into the fuel injection? I'm so disappointed, I have a bike that runs but not smoothly. I don't have the money to waste but if I have to I will :/.


In fact, if anyone that knows s2r 800's and is in the NOVA area - I would like for you to take the bike for a spin. I need to verify that this is not all in my head.

[justinrhenry]

does the s2r 800 have a choke on the left controls (cold start lever) the way my 620 does?  if so, do you have it pushed all the way up?

[rockaduc]

Exhaust, dyno tune, and ECU flash should def. help things out.  DOn't worry, you'll get this sorted and then you will be ALL SMILES!!!!   [moto]

BTW, I also have an 05 s2r, nice choice!!!   

[karrotx]

does the s2r 800 have a choke on the left controls (cold start lever) the way my 620 does?  if so, do you have it pushed all the way up?

Yes, the choke (idle assist) is all the way forward.


I can't shake this problem, it's so very unsettling. The jerk is so strong that if I was in a corner I'd probably high side..it's scaring me.

[Slide Panda]

Sounds a bit like it's running lean.  I monkeyed with my fueling a while back and it was very lean around 5k.  If I held the throttle there it was a herky jerky ride.

What sort of filter is on it?  Any mods to the air box?

[Jester]

Hate to say, but if there wasn't a red key, I wouldn't have bought the bike in the first place.  Also, the price may have been dropped that low due to the bike's known ( and not disclosed ) issues.  Hopefully it all gets sorted out for yah.  I have an 07' S2R.  Really capable bike for most riding.  Have you approached the seller about the issues and possibly a refund?  Lawsuit perhaps?

As far as the surging problem.... the S2R doesn't make seemless power below 4k rpms anyway.  You need to string it out and keep it over 4k for smoother power delivery, otherwise its lumpy at low rpms.  It likes to be rev'ed and responds well as long as you keep it in its sweetspot of 4k-8k.  Power drops off near redline, and as far as that goes, its a vtwin, so your redline isn't going to be real high like on jap bikes or even the higher revving sbk vtwin configurations.  Its a usable and friendly powerband if my opinion counts.

[karrotx]

Sounds a bit like it's running lean.  I monkeyed with my fueling a while back and it was very lean around 5k.  If I held the throttle there it was a herky jerky ride.

What sort of filter is on it?  Any mods to the air box?

Should be the stock filter, I've never checked. I'll check tomorrow morning.

Hate to say, but if there wasn't a red key, I wouldn't have bought the bike in the first place.  Also, the price may have been dropped that low due to the bike's known ( and not disclosed ) issues.  Hopefully it all gets sorted out for yah.  I have an 07' S2R.  Really capable bike for most riding.  Have you approached the seller about the issues and possibly a refund?  Lawsuit perhaps?

As far as the surging problem.... the S2R doesn't make seemless power below 4k rpms anyway.  You need to string it out and keep it over 4k for smoother power delivery, otherwise its lumpy at low rpms.  It likes to be rev'ed and responds well as long as you keep it in its sweetspot of 4k-8k.  Power drops off near redline, and as far as that goes, its a vtwin, so your redline isn't going to be real high like on jap bikes or even the higher revving sbk vtwin configurations.  Its a usable and friendly powerband if my opinion counts.

The problem is the 4k-8k range in all of the lower gears. 5k in 6th down the highway is smooth sailing. The low rpm's are actually rather smooth.

[kingbaby]

Should be the stock filter, I've never checked. I'll check tomorrow morning.


The problem is the 4k-8k range in all of the lower gears. 5k in 6th down the highway is smooth sailing. The low rpm's are actually rather smooth.

PM sent

[cutter]

This is highly unlikely, but I had similar symptoms on my first monster, an 02 750- the culprit was the fuel line to one of the cylinders was pinched under the airbox assembly- it came from the factory like that. I think the dealer would have noticed. I think you also would have, I did, took 10 minutes and a couple of allen wrenches to sort out. Sorry about the bad luck, I know the feeling. I just bought an old land rover this spring to find out the previous owner  decided to swap the crankshaft bearings and did it wrong- going to run 2500 at least to fix. Someone needs to make some sort of implant for testicles for anyone who sells a used vehicle so the new owner can electrocute them remotely if this sort thing happens.

[Travman]

What do the guys at DucPond say about your problems with the new engine?  Did they ride the  bike after installing the new engine?  I'm sure they can get the surging issues sorted for you.

[karrotx]

What do the guys at DucPond say about your problems with the new engine?  Did they ride the  bike after installing the new engine?  I'm sure they can get the surging issues sorted for you.

The owner said that his tech road the bike and said that's how all s2r's are. I'm not denying it, but from what I've read on here that's NOT how they are. I'm trying to get a second opinion on the matter, anyone with duc skills in the NOVA area is welcome to ride my bike (preferably off a cliff...I'm not kidding).

I want to get a second opinion that will either find a solution to the problem, OR I can mention this to Ducpond to see what they say. They did a great job dealing with me and I'm hoping this is a simple solution. The owner said that these bikes inherently have a dead spot at 3500-4000 because of how the engine is designed; I'm not sure if he was serious or didn't realize that this isn't a 1000 with an 02 sensor.

[needtorque]

All s2r are not like this.  However, bikes in lean conditions are.  Don't stress or give up yet.  My s4r (purchased this year) has a similar issue.  3800-4900 rpm in 1st, 2nd, and 3rd has bad bucking, popping, backfiring.  4th gear has it a bit and 5th and 6th are smooth as silk.  If I am accelerating at all the bucking goes away but when cruising anywhere in this rpm range it's bad.  I know it's lean and I just need to get it to a dyno.  I am waiting until after my 12k service when I will have them balance the TB, check the CO and TPS.  If the problem is still there (likely it will be) then I will take it to have a custom map run on the PC3 that came with the bike.

Your bike just needs proper tuning.

[karrotx]

All s2r are not like this.  However, bikes in lean conditions are.  Don't stress or give up yet.  My s4r (purchased this year) has a similar issue.  3800-4900 rpm in 1st, 2nd, and 3rd has bad bucking, popping, backfiring.  4th gear has it a bit and 5th and 6th are smooth as silk.  If I am accelerating at all the bucking goes away but when cruising anywhere in this rpm range it's bad.  I know it's lean and I just need to get it to a dyno.  I am waiting until after my 12k service when I will have them balance the TB, check the CO and TPS.  If the problem is still there (likely it will be) then I will take it to have a custom map run on the PC3 that came with the bike.

Your bike just needs proper tuning.

When I'm accelerating in 1st-4th the bucking is present :/. Thanks for the advice though.

[RUFKM]

My s4r (purchased this year) has a similar issue.  3800-4900 rpm in 1st, 2nd, and 3rd has bad bucking, popping, backfiring.  4th gear has it a bit and 5th and 6th are smooth as silk. 

needtorque, you're the one here that needs the FatDuc.  Best $80 you can spend.  All of your listed problems will just go away.  Takes 1/2 hour to install.