ON/OFF effect and issue changing gear
Posted: |October 7th, 2016|, 9:32 pm
Hi guys,
My 2005 Xtra-Raptor 1000 works pretty well in the country roads, but it doesn't in the city.
The main reason is the on/off effect. It means the hit you receive when you turn the throttle after having released it.
The issue appears on two different situation.
FIRST
The first issue appears every time you release the throttle and then you turn it again. The defect is not related to RPM. It's a small problema. I've to admit it. I owned 2002 Aprila RSV1000 in the past and also a 2000 Ducati Monster 900S. The Suzuki engine is easy compared to them. By the way... I see no reason to avoid improving the situation if possible. Any solution ?
Would the PAIR removal improve the engine response ?
I'm not interested in having more power and I usually keep the engine below 5000 RPM. I want only a smoother response. I can accept that situation anyway. It's really a minor issue.
SECOND
The secon issue appears every time i increase the gear using the clutch. The defect seems not to be present when you decrease the geat (e.g. from third to second). This defect is really not acceptable. It's always present. I'd say 90% of the time I use the clutch to change the gear. It's not always the same behaviour. Many times it looks like the first issue (see above), but it's really more detectable and annoying compared to it.
The worst case appear about 30% of the times I change the gear and it looks really like a ECM bug or something similar. The engine stuck for a very short moment when I try to accelerate after changing the gear and then it starts again with a power twice than usual. It's really annoying and it's also not easy to control the bike on heavy traffic condition.
I thought the second defect was due to the cut-off system (no fuel when throttle is released) and so I started investigating on how to disable it. I tried to false the clutch switch by short-circuiting it. The defect completely disappeared and also the first issue decreased, but awfully I faced lacks of power from 4000 RPM to 6000 RPM. It was really like the bike was about to turn off, so I discarded that solution.
The test helped me understanding a different map is loaded on the ECM when the clutch lever is pulled. I had a confirm about that from a GSX-R forum. I understood the second issue was probably due to the different map and it has got nothing to do with the cut-off system.
I turned on the bike and then I simply disconnected the clutch witch plug (always open).
Miracle !
The second defect completely (100%) disappeared. I rode for 20Km (city traffic included) without any issue when changing the gear. Only the first issue (see above) is still present, but I can absolutely accept it. It's part of a big twin engine.
Did anybody face the same issue ?
Did anybody try the same solution ?
Do you see any possible side-effect for that solution ?
I'll create a patch to enable the clutch switch only when the start button is pressed and then it will be disabled automatically (always open).
Thanks everyone !
My 2005 Xtra-Raptor 1000 works pretty well in the country roads, but it doesn't in the city.
The main reason is the on/off effect. It means the hit you receive when you turn the throttle after having released it.
The issue appears on two different situation.
FIRST
The first issue appears every time you release the throttle and then you turn it again. The defect is not related to RPM. It's a small problema. I've to admit it. I owned 2002 Aprila RSV1000 in the past and also a 2000 Ducati Monster 900S. The Suzuki engine is easy compared to them. By the way... I see no reason to avoid improving the situation if possible. Any solution ?
Would the PAIR removal improve the engine response ?
I'm not interested in having more power and I usually keep the engine below 5000 RPM. I want only a smoother response. I can accept that situation anyway. It's really a minor issue.
SECOND
The secon issue appears every time i increase the gear using the clutch. The defect seems not to be present when you decrease the geat (e.g. from third to second). This defect is really not acceptable. It's always present. I'd say 90% of the time I use the clutch to change the gear. It's not always the same behaviour. Many times it looks like the first issue (see above), but it's really more detectable and annoying compared to it.
The worst case appear about 30% of the times I change the gear and it looks really like a ECM bug or something similar. The engine stuck for a very short moment when I try to accelerate after changing the gear and then it starts again with a power twice than usual. It's really annoying and it's also not easy to control the bike on heavy traffic condition.
I thought the second defect was due to the cut-off system (no fuel when throttle is released) and so I started investigating on how to disable it. I tried to false the clutch switch by short-circuiting it. The defect completely disappeared and also the first issue decreased, but awfully I faced lacks of power from 4000 RPM to 6000 RPM. It was really like the bike was about to turn off, so I discarded that solution.
The test helped me understanding a different map is loaded on the ECM when the clutch lever is pulled. I had a confirm about that from a GSX-R forum. I understood the second issue was probably due to the different map and it has got nothing to do with the cut-off system.
I turned on the bike and then I simply disconnected the clutch witch plug (always open).
Miracle !
The second defect completely (100%) disappeared. I rode for 20Km (city traffic included) without any issue when changing the gear. Only the first issue (see above) is still present, but I can absolutely accept it. It's part of a big twin engine.
Did anybody face the same issue ?
Did anybody try the same solution ?
Do you see any possible side-effect for that solution ?
I'll create a patch to enable the clutch switch only when the start button is pressed and then it will be disabled automatically (always open).
Thanks everyone !