Bill Is that the parts bin, the washer bin, the ultrasonic cleaner bin, or the bin for me to come and empty when I need a plug
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Carburettor choices
- Thread starter Hicam
- Start date
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The last, Can't mess with old plugs, Will only give hard to find misfire later, Or non start.
We have got a few old bikes going over the years, And it's a joke where I buy my Plugs !,
Not another Box Bill ??, What do you do with them ?.
I met a West London Man on the road years ago, No spares !, Gave Him a couple of plugs and away He went.
We have got a few old bikes going over the years, And it's a joke where I buy my Plugs !,
Not another Box Bill ??, What do you do with them ?.
I met a West London Man on the road years ago, No spares !, Gave Him a couple of plugs and away He went.
Thanks for all your feedback.
My wife has suggested I leave the plugs where they are and put the bike in the bin!
Stripped the fuel system this morning. Pipes, taps, carbs and float chambers. Thought I'd replaced the slides but hadn't. They are worn so will buy new ones. Filler cap breather a bit gummed up but not enough to stop fuel flow. Everything else is ok. Contents of fuel tank not being reused, will use fresh. Some debris found in tank when left hand tap removed but right hand tap clear.
It is slightly down on compression on one cylinder when I checked. May have to revue that when I get it running.
Will report back when new carb slides (6/4) fitted. I would like to keep it original if possible.
Regards Chris
Compression may improve after a few miles ?. Good Luck, Bill.
I am not sure put me right, if I am wrong please let me know, did not Stevens of Know Thy Beast recommending to use the decompressor to start the bike as the excess strain on not using it can cause problems with the kick start mechanism, sorry if I got it wrong everyone.
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Not just Eddie Stevens. I wince every time I see someone trying to start a bike without the valve lifter. The strain it puts on the mechanism is asking for trouble.
My Rapide isn't the easiest to start but 3 kicks when cold is about normal...I have only been successful once when using the decompressor and I envy all who have mastered that technique. Any tips?
PS My bike loves it's chokes to start and run for about 2-3 minutes when cold. When hot it likes the chokes just to start, not needed to run
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I see people using the chokes on the original carbs and often wonder why they bother.
Unlike perhaps a choke on say an AFB four barrel (American car stuff) which is like a big butterfly across the whole intake, the chokes on our original carbs are a slide which goes down in the middle of the throttle slide. So I see people just say, Oh it needs just a bout 1/4 choke and a closed or slightly open throttle. Unless you open the throttle slide at least 3/4 of the way the choke is just hidden up in the throttle slide. To have any effect at a small throttle opening the choke must be dropped down to the bottom to have the desired effect of choking off some of the air flow, thereby as the intake stroke still pulls the same amount of air, the velocity of the air must increase thereby sucking more fuel from the pilot circuit.
Mikunis on the other hand have a small fuel reservoir with a jet in the bottom. When "choking" these you actually lift the plunger allowing the fuel to flow directly into the intake path thereby enrichening the mixture. In fact these are called enricheners as opposed to chokes.
Unlike perhaps a choke on say an AFB four barrel (American car stuff) which is like a big butterfly across the whole intake, the chokes on our original carbs are a slide which goes down in the middle of the throttle slide. So I see people just say, Oh it needs just a bout 1/4 choke and a closed or slightly open throttle. Unless you open the throttle slide at least 3/4 of the way the choke is just hidden up in the throttle slide. To have any effect at a small throttle opening the choke must be dropped down to the bottom to have the desired effect of choking off some of the air flow, thereby as the intake stroke still pulls the same amount of air, the velocity of the air must increase thereby sucking more fuel from the pilot circuit.
Mikunis on the other hand have a small fuel reservoir with a jet in the bottom. When "choking" these you actually lift the plunger allowing the fuel to flow directly into the intake path thereby enrichening the mixture. In fact these are called enricheners as opposed to chokes.
There are a couple of ways to use that decompresser. Not using it all makes life unecessarily difficult.
One way is just to give it a boot with the lever held up at start then drop the lever as the boot goes down. That seems to be about the best method, or at least the least bothersome method.
The other way is to just use the decompresser to slowly squeeze through most of the compression stroke then release the lever and give it a good kick. This works best if you find the long space between compression strokes, that way the heavy flywheels are really spinning when the next compression stroke is encountered.
Here is the first method. This bike is pretty easy to start. A bit more effort ( speed) might be required for some machines.
One way is just to give it a boot with the lever held up at start then drop the lever as the boot goes down. That seems to be about the best method, or at least the least bothersome method.
The other way is to just use the decompresser to slowly squeeze through most of the compression stroke then release the lever and give it a good kick. This works best if you find the long space between compression strokes, that way the heavy flywheels are really spinning when the next compression stroke is encountered.
Here is the first method. This bike is pretty easy to start. A bit more effort ( speed) might be required for some machines.