Blipping the throttle

johnm

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Far be it from me to disagree with Kevin Cameron but actually I'm with Oldbezzer. Certainly GP carbs had no idle circuit except for the attempt on the BSA 650. The special model but I forget the name. They had a small hole drilled in the slide.

So maybe a bit of both.
 
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robs ss

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I had never read that article but have "blipped" to avoid longer idling (eg: slow lights) which I believe to be bad for flat followers and cams.
Not saying I'm right - just that it makes me more comfortable.

Edit: It also sounds nice - at least to me.
 
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Apologies folks, not sure if lockdown is affecting my mood but I read that article and thought what a load of pretentious twaddle... Was it written BY a 12 year old or FOR 12 year olds? Okay, some race engines need high revs to preserve the integrity of the lubrication system, I buy that, but is it why YOU do it? You do it 'for fun???' Gimme a break, ffs....
I don't ride a Norton Cosworth, and have never attended a race meeting, so why would I feel the need?
Truth is I ride 40-50 year old clunkers, primitive machines with a mind of their own who aren't afraid to bite me on the backside once in a while.. That 'perfect idle' I managed in the garage, sometimes stays in the garage (yes, it was a warm engine). I don't do the: 'Traffic Light Grand Prix' but what I DO want is a smart getaway, lest I end up arguing with the moron behind as to why my tail light and his radiator are now one... Or suffer the ignominy of stalling then the 'cross lane paddle' before sweating on the kickstart to relight the plot. Best avoided of course with clutch fed in on a rising throttle... hence the blip (long story but we got there :) )
Next weeks article: Why your wheels are round.....
 

Fast Eddie

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Yes, over pretentious twaddle to a degree, but still kinda interesting.

As already mentioned, most proper race carbs didn’t even have a tickover function.

Also, even if the carbs did have a tickover function, many racers used set there carbs to have zero tickover as it maximises engine braking.

And finally, I was told you don’t hold a race e fine on a steady throttle to ‘tickover’ blipping gently does help it to splash oil around the important parts, and closing the throttle momentarily creates a vacuum that sucks oil up the bores.

Thats all for racers. On the road there are two other important reasons:
1. the bike is badly set up and won’t idle for love nor money
2. the boy racer hooligan owner likes makin’ noise !!
 
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If you for some reason unknown to me have a Norton that idles when warm, it will not have it cold. So blipping is normal when warming up. On the bikes I have with idling circuits, I try to adjust idling as best I can. Then I dismiss it, as I prefer killing the engine when rolling back the throttle. Except on some touring bikes. Those drum brakes will enjoy a little help from engine. So my occasional habit of blipping at red lights comes from my racing started in -69.
 
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