| Author | Message | ||
     Emptychambers |
Hey guys. I've got a 2003 XB9SL with 30k on the clock. Yes, I know, its fairly old and tired at this point. It looks like hell, but I still love it. Anyways, the reason I'm posting is that it seems like it revs quite slowly. I can whack it all the way open, and it takes a few seconds to hit redline. Maybe I'm just used to the rate at which Japanese sportbikes spin up, but this just seems excessive. Even compared to other videos, it seems off. What could be causing this? My ECM is flashed to race settings, and I've got a (mostly empty) Jardine RT1. It has a custom fuel map that was put on by the previous owner, so I can't really claim that its the best. does anything jump out at you, or should I just do a TPS reset and see what happens? Edit: Forgot to mention that it has a Uni foam air filter, and the breather reroute done already. The XB guys suggested the seals on my intake manifold, but it runs fine, and without a lumpy idle, so I'm not sure. Thoughts? | ||
| Terrys1980 |
So at idle in neutral it will rev up without any strange noises, hiccups, sputter, or hesitation? It's just ridiculously slow? A good place to start would be to check plugs and wires. Pull the filter,have a look down inside the throttle body, it probably needs a good cleaning too. The race ecm settings are not nearly good enough to compensate for a Jardine, especially one that is gutted. If you don't repack it soon expect the end cap to be blown off soon. | ||
| Emptychambers |
Thats correct. It runs fine, just slowly for some reason. It runs properly for whatever speed the engine in moving at however. Hmmm. So I likely need a custom map for my exhaust then? I could probably create one, if I can't find any premades floating around. I did think it was just the rivets that fell off from the vibration. If the entire end is going to blow out, then I'll prioritize repacking it. I have everything here, just was being lazy honestly. | ||
| Terrys1980 |
The only thing I can think of that would make the engine act like that is a restriction in the exhaust system. The empty Jardine can might have some effect as there isn't a consistent exhaust gas flow or too much turbulence in the can. Tuning these bikes isn't that difficult once you get the hang of it. You might even find some maps on this forum that you could use. Even if you do use a map from another bike, you will need to do some tweaking. All bikes have their differences. | ||
| Sparky |
The Uni filter, if it's old, may be collapsing on itself and partially restricting airflow inlet. Try taking the filter off and whacking the throttle to see if there's any difference. | ||
| Midknyte |
If you don't repack it soon expect the end cap to be blown off soon. huh? To what do you refer? | ||
| Terrys1980 |
When your packing is all but gone, the exhaust is constantly pounding against the stainless steel end cap that the exhaust outlet is in. Not only will it loosen the rivets but you can probably see discoloration and spots on the end cap. Most people blame their cans coming apart on Jardine when the majority of the time its lack of maintenance of the packing material. | ||
| Slaughter |
What Sparky said - try without the filter. It'll tell you in a moment. You'd need to run it steady-state on the road at 3500RPM for 3 minutes so it "adjusts" to the filterless intake. I can't recall if that 3500 for 3 minutes is right or not (others can correct me) Costs nothing and will answer the question about the intake. | ||
| Terrys1980 |
Slaughter the area you are referring to is the closed loop learn. To truly know you are in that area, you would need to use ECMSpy to check TPS percentage and put some marks on the throttle control.  | ||
| Firemanjim |
Dang,that map is odd,look at the pogo from 1900/172,2400/157,back to 2900/165 then 3400/155-----more fuel at 1350rpm than at anywhere else up the scale?????? | ||
| Blake |
Use more or better (bigger, higher grade material) rivets. | ||
| Terrys1980 |
Firemanjim the map was only for reference only. Have a look at any stock XB map, they all have the same thing going on in that area. |
