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-   -   Blipping the throttle. (http://forums.sv650.org/showthread.php?t=111176)

leatherpatches 29-05-08 12:41 PM

Re: Blipping the throttle.
 
No, for everyday road riding it makes a lot of sense, particularly in the lower gears.

Dave The Rave 29-05-08 12:41 PM

Re: Blipping the throttle.
 
I am sure I have recently read some article about the blip not doing anything else but just make you feel better. I am not sure if I read it on the web or in a bike magazine.

If you use it to synchronise the engine speed with the gear speed how the hell can you do that? How do you know what revs are required. People blip it just above the tickover speed slightly, well at least I do. I do not rev the t1ts out of the bike doing so. So how can you synchronise the speeds if you do not know what speed to synchronise it?

I am not being awkward but just try to uderstand what it actually does? I use it but do I feel any diference ...NO.

G 29-05-08 12:48 PM

Re: Blipping the throttle.
 
To drop down a gear, there is a band where it will fall into line smoother, you dont need to know the exact sync speed, it just falls into place.

Try it in your car if its not your own so dont mind blowing up your gearbox if you get it wrong.

Drive along and lift off the accelerator, disengage the gears without using the clutch it will just fall out of gear, then rev slightly higher than what you were reving and then gearstick will slip into the next gear up without the need to even touch the clutch.

Its works the same changing down, lift off, take out of gear, give some revs and position gear stick at which gear you want it in and play about with the revs....if you get it right it will again drop into gear without needing to go near the clutch.

Doing this with the use of the clutch aswell makes for much smoother changes and higher rev/less engine breaking when you change down.

AndyW 29-05-08 12:52 PM

Re: Blipping the throttle.
 
Quote:

Originally Posted by leatherpatches (Post 1524038)
No, for everyday road riding it makes a lot of sense, particularly in the lower gears.

How?
What does it achieve that I don;t by rolling the power on/off with the clutch?

AndyW 29-05-08 01:23 PM

Re: Blipping the throttle.
 
Quote:

Originally Posted by graemepaterson (Post 1524042)
To drop down a gear, .....

Ok, I'm now on wikipedia trying to understand how constant mesh works
http://en.wikipedia.org/wiki/Manual_transmission
I might learn something today despite my brain being dead while at work.

leatherpatches 29-05-08 01:30 PM

Re: Blipping the throttle.
 
Quote:

Originally Posted by AndyW (Post 1524047)
How?
What does it achieve that I don;t by rolling the power on/off with the clutch?

Rather than try and explain it I'll lift this explanation from the myriad that are available via google:

Quote:

To answer the original poster's question, let's say that in 3rd gear at a given speed your engine is running at 3000 rpms and in 2nd gear it's running at 4000 rpms at the same speed. If you quickly downshift and let the clutch out without attempting to match engine speed, your engine is still at 3000 rpms but the rear tire wants it to be at 4000. The rear tire can slide until it speeds the engine up to 4000 rpms to match the road speed.

However, if you blip the throttle to get the engine up to 4000 rpms before letting the clutch back out, you're now at the right speed and all will be smooth when you complete the shift.

You don't have to hit 4000 rpms exactly, either. If you're close when you let the clutch back out the rear tire only needs to make the engine change speed by a tiny bit, which shouldn't upset your traction.

The alternative is to let the clutch out slowly, which will also get the engine up to speed without upsetting the rear tire, but that causes more wear on your clutch. Still, it's probably the best choice for a new rider until you get the hang of matching engine speed during downshifts.

It's a good explanation but what he fails to say is that as well as reducing the chance of the tyre skipping it also reduces wear on clutch and tyre and produces a much smoother and arguably safer ride.

neio79 29-05-08 01:32 PM

Re: Blipping the throttle.
 
Quote:

Originally Posted by ThEGr33k (Post 1523970)
Guess some bikes have pussy bottom and mid ranges... :rolleyes: Changing gear Pah. :p

NOTE. Nothing outside of 1000cc Sports bikes do over about 75MPH in first. And no your speedo is not telling the truth if it says other wise... A modern 600 is geared for 65-70MPH depending on model at the limiter. So physically cannot go any faster. :smt066

:D

err you seem to be talking out your ar*e again mate ;), They have data logged the current crop of 600's and yes they will genuinly do just over 80MPH in 1st :smt045. There is no way my spedo has a 16MPH error at 86!!!

ChrisCaveman 29-05-08 01:33 PM

Re: Blipping the throttle.
 
I blip the throttle because it makes me feel cool :D
(and for the gear changing reasons too)



Flamin_Squirrel 29-05-08 01:44 PM

Re: Blipping the throttle.
 
Quote:

Originally Posted by Luckypants (Post 1524006)
Hmmm am I using wrong terminology then? Quick google finds FS to be correct, a car gearbox is indeed a constant mesh gearbox. So what is the correct term for a bike gearbox versus a car (type) 'box? (as I find myself in the odd position of being incorrect! :rolleyes: )

Not sure! Bike gear boxes are seqential, thats the only difference I can think of (oh, and they live in engine oil where as car boxes don't). Where's embee?!

Quote:

Originally Posted by Luckypants (Post 1524006)
I thought the only neutral on a bike was between 1st and 2nd (normally)? But as Stu pointed out, where does false neutral come from?

The gear changing process is similar on a bike to a car. You slip out of one gear into another - the space between gears being neutral. The box on a bike is just designed so that when you move out of one gear it drops straight into the next one. Except 1st and 2nd.

carty 29-05-08 01:50 PM

Re: Blipping the throttle.
 
Yep, sequential is the correct term for the gearbox, some cars have them too. I agree with Neio and G2D on the speed of the 600's, I haven't looked precisely but I know I can do well over 80, possibly showing 90 on the clocks on my GSX-R600 K7 and I doubt there's that much inaccuracy on the speedo. It'll certainly do well in to three figures in 2nd. Great fun!

I did used to blip on my SV, particularly after I locked the rear a couple of times approaching roundabouts but I must admit to getting out of the habit since I got a slipper clutch. It really does take out the 'hassle' of worrying whether you're going to lock the rear. I like the sound it makes too, you can hear the mechanics of it working as it slowly lets the clutch out. Very clever.


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