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VermilionX wrote:

Sevulturus wrote:Are you applying proper throttle when you downshift to match engine speed to wheel speed? Is the bike jerking when it dies after a downshift?

i don't blip my throttle when im coming from a full stop or if im slowing down to hit a car in front of me.

Care to repeat that in English?

Sevulturus wrote:
Care to repeat that in English?

err... i dunno how i can say it better.

i guess i meant i was just engine braking instead of blipping the throttle during those instances.

Sevulturus wrote:

VermilionX wrote:

Sevulturus wrote:Are you applying proper throttle when you downshift to match engine speed to wheel speed? Is the bike jerking when it dies after a downshift?

i don't blip my throttle when im coming from a full stop or if im slowing down to hit a car in front of me.

Care to repeat that in English?

If you hit the cars too fast you don't really enjoy it... Verm prefers to slow down when he wants to hit a car in front of him so he can savor the experience. I think that's what he means anyway.

I've read that some Suzukis (SV series is the one I know of) will sometimes die if you blip the throttle in the first few minutes of running. Doesn't sound like that's the issue here though.

Is the idle speed even adjustable on a GSX-R? If so, why?

dieziege wrote: I've read that some Suzukis (SV series is the one I know of) will sometimes die if you blip the throttle in the first few minutes of running. Doesn't sound like that's the issue here though.

I can vouch for that happening. Generally only when it is really cold. Seems to me that it's running rich enough that bliping the throttle floods it somehow.

VermilionX wrote:

Sevulturus wrote:

VermilionX wrote:

Sevulturus wrote:Are you applying proper throttle when you downshift to match engine speed to wheel speed? Is the bike jerking when it dies after a downshift?

i don't blip my throttle when im coming from a full stop or if im slowing down to hit a car in front of me.

Care to repeat that in English?

err... i dunno how i can say it better.

i guess i meant i was just engine braking instead of blipping the throttle during those instances.

I'm going to help you out here, and possibly identify your problem.

"i don't blip my throttle when im coming from a full stop of if im slowing down to hit a car in front of me."

Okay, so, you're coming from a full stop, and you don't use the throttle... that makes sense. Maybe you meant you are going to BE coming UP to a full stop.

"or if im slowing down to hit a car in front of me. "
This sounds like you're trying to slam into the vehicle in front of you, but really, I think what you meant is that, once again you don't use the throttle to match engine speed to wheel speed, you just downshift and release the clutch, using "engine braking" to avoid the accident."


So, putting these facts together:
1) Your inability to correctly downshift
2) The fact that your bike seems to be stalling
3) MY assumption that your bike has a slipper clutch

All amounts to: "The rider doesn't know how to properly ride his bike and has been stalling it. The reason you don't get the sudden lurch forward from the back wheel is the fact that the clutch allows some slip to smooth out those mistakes you've been making."

In order to correctly downshift you must do the following:

1) pull in the clutch
2) rev the engine to a higher RPM then it was at
3) toe down on the shift lever once to select a lower gear
4) maintaining throttle smoothly release the clutch

If done correctly your bike will maintain the same speed at which point you simply close off the throttle, and the engine will brake for you.


If I'm right, this is why you shouldn't be buying a supersport to learn on.

Well, it could be all the gobbledy-gook mentioned above, or it could be a faulty clutch switch. Check the switch and its associated connections and make sure the wiring didn't get pulled.

Take the stickers off and see how that goes. Either way it will be an improvement.

im 100% sure the problem is not rider error.

im not stalling. i already said it's not jerking, it's like somebody pushed the kill switch button, power just goes away.

i know how to shift right. this problem didn't happen before. it only occured this past 2 weeks. maybe after 2500 miles of riding it.

im gonna take it to my mechanic next chance i get.

i just have to make sure to be careful to not change gears in the middle of conerning. since that seems to be the only time this problem pops up.

ZooTech wrote:Well, it could be all the gobbledy-gook mentioned above, or it could be a faulty clutch switch. Check the switch and its associated connections and make sure the wiring didn't get pulled.

That's what I was thinking as I read this. But then I started thinking more about it and I don't think the clutch switch can kill the ignition (like the kickstand switch does). On most applications I've seen, the clutch switch is there to prevent starting with the clutch lever out, so it only cuts off the starter circuit instead of the ignition.

That said, I have seen bikes that kill the ignition when the kickstand switch is loose. What happens is a vibration causes the kickstand to lose contact with the switch and the engine dies. If it's just a little bit loose, this could happen intermittently. I'd look down around the kickstand and make sure it's fully contacting the microswitch. No looseness in the switch mount or the wiring.

This may not be the problem, but it's easy to check and could save you a trip to the mechanic.

flynrider wrote:That's what I was thinking as I read this. But then I started thinking more about it and I don't think the clutch switch can kill the ignition (like the kickstand switch does). On most applications I've seen, the clutch switch is there to prevent starting with the clutch lever out, so it only cuts off the starter circuit instead of the ignition.

Ah, good point. If it is the kickstand switch, though, that doesn't account for it happening only during shifts.