[481]

Disclaimer: If you have a problem with your motorcycle after doing this, I'm not responsible. This is an old school technique that will take practice to get right.

I'm sure people will have wildly differing opinions on this subject so I'll start by saying this:

I've been around motorcycle racing my entire life. I started road racing when I was twelve years old, and raced professionally from '04-'07. I still compete in local club races for fun. To do full throttle upshifts using this technique it will take PRACTICE. I raced a pair of Ducati 749RS's in 2005 and used an almost identical set up to enable the bikes to do full throttle upshifts. It took a little getting used to, but once I got the timing down it worked flawlessly.

On to the good stuff:

Essentially all you're doing is turning your horn button into a momentary ignition kill switch. It functions the same as a quickshifter installed on the shift linkage. The only difference is that you will have to manually press the horn button as you make your upshifts. Here's a schematic of how I did my bike. I added a female connector to the horn button side of the harness (left hand switch harness) so that I can easily unplug the quickshifter and plug my horn back in if I want to.

I pulled the connectors out of the OEM plugs to make things easier. I highly recommend doing it this way. It simplifies things!

Top connector is for the quickshifter, bottom is for the horn.

1) Accelerate with the throttle wide open.
2) When approaching your desired shift point, pull up on the shifter LIGHTLY. (Just a slight amount of pressure)
3) Keep the throttle wide open and QUICKLY press and release the horn button while CONTINUING to apply pressure to the shifter.

The bike should click into the next gear with the throttle completely wide open. Sometimes there may be a slight backfire or pop as you make your shifts. This is because when you depress the horn button and kill the ignition the fuel injector is still spraying fuel into the engine, so don't worry.

Like I said before, this will take PRACTICE to get the timing down.

If you have any questions let me know. I'll try to get some video up soon of me going through the gears on my bike. Enjoy!

 

[Grom1202]

Nice...

braap

 

[Remould]

Do you not need to use the clutch at all with this method?
I'm new to bikes (only had my MSX for a couple of months) so not heard of this technique before.

Do you need to apply more pressure to the shifter the moment you press the button, or does the process of momentarily killing the ignition reduce pressure on the gear selector assembly, allowing the gear shift?

I'm quite tempted to try this out.

Sent from my HTC One using Tapatalk

 

[gromhawk]

Or use the control switch for the hazards off a 13 cbr500.
Like this and this is installed on a grom. that way you can still have your horn.

 

[481]

Do you not need to use the clutch at all with this method?

Do you need to apply more pressure to the shifter the moment you press the button, or does the process of momentarily killing the ignition reduce pressure on the gear selector assembly, allowing the gear shift?

No clutch. Every bike will be a little different as far as putting pressure on the shifter goes. It's best to play around with it at low RPM's and about half throttle to practice and see what works best for you and your bike.

Great questions!

Or use the control switch for the hazards off a 13 cbr500.
Like this and this is installed on a grom. that way you can still have your horn.

That could work!

As long as the hazard button acts the same as the horn button that is. Most hazard buttons are usually: press to turn on-press to turn off. Not just press and release like a horn button. I haven't seen one of those switches in person though so I have no idea.

I'll do my best to get some video of my bike this week. No guarantees!

 

[The_Grominator]

A popular mod in thailand is to swap the clutch side switch cluster with that from a KSR because it has two more switches - hazard lights and pass/flash

I think it would be a great mod to do wirh this because the pass/flash is a trigger finger switch which I thibk would feel more natural and make timing easier than using your thumb to hit the horn button (and u preserve your horn function too)

Just thinking out loud

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[481]

A popular mod in thailand is to swap the clutch side switch cluster with that from a KSR because it has two more switches - hazard lights and pass/flash

I think it would be a great mod to do wirh this because the pass/flash is a trigger finger switch which I thibk would feel more natural and make timing easier than using your thumb to hit the horn button (and u preserve your horn function too)

Just thinking out loud

Sent from my GT-I9505 using Tapatalk

That would be fun to try. I got so used to using an extra kill button on race bikes that the horn button feels natural to me. That's the cool thing about this though, you can put the button wherever you would like! You could even add a really small button to the stock switch housing if you wanted to. I know Radio Shack has plenty of small push buttons to choose from!

 

[Scintilla]

Cute mod :wink:


Instead of putting a switch on the handlebars.
You can try to put it directly on the gear lever.

We need a precise adjustment and a quick movement of the foot.


But at least, once set, remains constant.

 

[481]

Cute mod :wink:


Instead of putting a switch on the handlebars.
You can try to put it directly on the gear lever.

We need a precise adjustment and a quick movement of the foot.


But at least, once set, remains constant.

Yes, you could do that. The point of this is to eliminate the need to modify the stock shift linkage or fabricate a new shift linkage all together. Most quickshifter assemblies that are made to go on the shift linkage are expensive.

A button on the handlebar is easy and cheap to do. It also works great when you get the timing down.

I have video of me going through the gears on my bike now. I'll do my best to get it uploaded when I get home tonight.

 

[481]

Here you go guys. I wasn't revving my bike very hard when we shot the video. I was doing this in a residential area behind our shop and didn't want to make too much noise. But, you can see that it works. You can also hear the small pops I was referencing in my first post when I first press the button while sitting still, and on my final shift to fourth gear as I ride by. All of my shifts as I rode by were done at 100% throttle with no clutch.

 

[rkwfxd]

Very nice

 

[481]

Very nice

Thanks!

 

[HRCNICK11]

Graves makes a box that does this for the Yamaha 450 for supermoto racing they tried the road race style cut outs and they did not work for crap on dirt bikes. Their box has adjustments for the length of kill. A friend of mine had this on his bike and just used a extra dirt bike style kill switch with the graves box.

You preload the shifter and then press the button on the graves it did the rest. In the above set up you have to time when to let go of the button.

 

[THE TECH]

Pretty cool.

 

[481]

In the above set up you have to time when to let go of the button.

Yep. After you practice and get the timing down it becomes second nature. I've been riding my bike for about a week using this technique anytime I get a chance (sometimes even at 1/4-1/2 throttle just for fun) and it's been working great.

Pretty cool.

Thanks!

 

[4Nines]

This is super cool! Thanks for sharing

 

[3sexy5u]

Reviving the coolest thread I didn't know I needed in my life...

This is awesome!!!

 

[Batty]

Brilliant - I was looking for a way to beat my mate on his KTM 990 Duke at the Woop-Ass Wednesday drags. I have a Raptor (Think SV1000). Very evenly matched. Quarter mile times around 11.6s at 200 km/hr. Tried the cheap quickshifter idea. However, I wired a 12V 5 pin relay to the horn button, so that activating the horn opened the contacts to the coil supply. It works great! Light pressure up on the gear lever, then just flick the horn button for a lightning quick full throttle upshift! All for $5! The mark 1 version used the kill switch instead of the coil feed. However, this did not work - it resulted in a relatively long pause and consequently huge mono!! It is a simple matter to change the relay connections back to the horn, since the relay is mounted on the same point. The white connections are the horn ones, the blue cut into the coil feed

 

[481]

Brilliant - I was looking for a way to beat my mate on his KTM 990 Duke at the Woop-Ass Wednesday drags. I have a Raptor (Think SV1000). Very evenly matched. Quarter mile times around 11.6s at 200 km/hr. Tried the cheap quickshifter idea. However, I wired a 12V 5 pin relay to the horn button, so that activating the horn opened the contacts to the coil supply. It works great! Light pressure up on the gear lever, then just flick the horn button for a lightning quick full throttle upshift! All for $5! The mark 1 version used the kill switch instead of the coil feed. However, this did not work - it resulted in a relatively long pause and consequently huge mono!! It is a simple matter to change the relay connections back to the horn, since the relay is mounted on the same point. The white connections are the horn ones, the blue cut into the coil feed

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Haven't logged into this site in years, so cool to see it worked out well for you!

 

[3sexy5u]

Haven't logged into this site in years, so cool to see it worked out well for you!

Awesome stuff man, to this day I still have a momentary switch mounted on my handlebars to use just for this purpose. It is CRAZY FUN every time I use it, sometimes a little scary when the front wheel lifts going from 1 to 2 haha.