1190 de noid with race ECU- result ?

[yzf29]

Is loss of 3 pounds of solenoid apparatus

NO other issues?


THANKS

[Doosh]

More or less, correct.

[yzf29]

^Thanks^

So what might be more, and what might be less? Just don't want any issues I am not accounting for.

Bike starts and runs fine- throttle pick up is "lighter" feeling without pulling the extra cable for the solenoid. No check engine light, nothing.

[Mike]

YZF -

Did you tie the linkage together at the rear throttle body ?
This needs to be done if you don't want the rear butterfly "fluttering" when the throttle is opened hard at mid to higher rpm's.

Mike

[yzf29]

I did not-

I shall do so!

Thanks!

Safety wired it for laffs

[AKA Marco]

i have just de solenoid my SX, + race ecm and tips.... no issues... i have not tied the linkage as some say, but because if it wasn't an issue when solenoid, i don't see how it could be an issue when de solenoid....

bike got much better, less engine braking, smoother engine overall, which makes it easier to ride on my book ... have you changed the gearing at all? i have gone up to 44 on the rear sprocket and find it much better, might also go up to 46...

[yzf29]

Thanks for chiming in AKA Marco. Good feedback. Gearing is stock. Definitely want to try different gearing . ...

[Doosh]

This needs to be done if you don't want the rear butterfly "fluttering" when the throttle is opened hard at mid to higher rpm's.

This was always rumored to be a problem, but I've never *known* it to be an actual issue.

[Mike]

AKA -

All you have to do is open the "throttle" and then twist the two linkages...you'll see, they WILL separate when the spring pressure is overcome.
I had it happen on my CR.
But then again, if you don't "feel" it doesn't happen right..?

As for not happening "with" the solenoid connected comment.
OF COURSE NOT...the solenoid controlled that..! It DID...happen with the solenoid connected, that's what it was designed to do. The solenoid controlled the amount of change and kept it from fluttering.
As far as I know, it was an EPA thing related to noise. I never heard anything else. It closed that huge rear butterfly a little to keep the intake noise down a little. True...maybe, maybe not, but it's there for something.

To my way of thinking, better to have things as controlled as possible, but that's just me.

Your bike..!

Mike

[Doosh]

The 'noid can't push -- it was cable drawn. The advice to tie these together certainly can't hurt anything. It's actually less likely to happen with the 'noid gone than present, as I see the mechanicals working. The noid was an all-or-nothing thing, btw. There was no variable control happening. And, it closed both throttle bodies, not just the rear one.

Having seen several Buell-prepared race bikes from the 1125r era and never seeing the butterflys tied, I'm really not sure it's necessary.