Another bogging thread

[BarelyAWake]

o_O

No, no, no - that's all just cable tension, it's got nothing to do with idle speed, wrong end of the horse man lol

In addition - there is NO "fuel air" mix set screw on these lil carbs (wish there was lol) - THAT is the idle set screw (2 1/2 turns out from stop is usually a good place to start).

Ya might wanna nix that vid and make another. All that cable adjustment is solely to make sure there's no free play or tension on the cable, you do not want to "set" yer idle like that - if a cable binds like in a turn, your motor could change speed or even get stuck at redline... very sketchy.

I like the fact ya made a "how to" vid though - nice, can't fault a guy fer tryin' to help

This is how the idle set screw works;


See that ramp at the bottom of the slide and the lump down in the carb (the one at the top of the hole)? as you turn the screw in - the "lump" goes further into the carb and as it hits the ramp - the less far down the slide can go, allowing more air and fuel into the engine - thereby increasing the idle speed.

[DonnnN]

Originally Posted by BarelyAWake

o_O

No, no, no - that's all just cable tension, it's got nothing to do with idle speed, wrong end of the horse man lol

In addition - there is NO "fuel air" mix set screw on these lil carbs (wish there was lol) - THAT is the idle set screw (2 1/2 turns out from stop is usually a good place to start).

Ya might wanna nix that vid and make another. All that cable adjustment is solely to make sure there's no free play or tension on the cable, you do not want to "set" yer idle like that - if a cable binds like in a turn, your motor could change speed or even get stuck at redline... very sketchy.

I like the fact ya made a "how to" vid though - nice, can't fault a guy fer tryin' to help

This is how the idle set screw works;


See that ramp at the bottom of the slide and the lump down in the carb (the one at the top of the hole)? as you turn the screw in - the "lump" goes further into the carb and as it hits the ramp - the less far down the slide can go, allowing more air and fuel into the engine - thereby increasing the idle speed.

Nice explanation..

[Nashville Kat]

I always tell people bogging down to PLAY WITH THEIR PETCOCK!!!!!

It's really just a test- try closing the gas flow DOWN a little-if performance improves, the motors are often getting TOO MUCH gas to air, or else a too- rich, not enough oil in gas mix. Also then, not enough air- A few holes drillled in the back of the stock plastic air filter helped my 66 breathe better.

If the petcock adjustment makes no other difference beyond eventually shutting the motor down, then it's something else.

[DanielMaia]

I think that i have the same problem. The problem is not the carburettor, because i put one 18mm bing from my kreidler florett, and the idle is really really perfect, a response very good, but when i'm going to take a ride, the motor simply fails, and die :S i dont know what is it, maybe the gasket? I took off the old gaskets, and put some RSV sealante high temperature..

The spark plug is perfect - brown...

[Bikeguy Joe]

Originally Posted by DanielMaia

I think that i have the same problem. The problem is not the carburettor, because i put one 18mm bing from my kreidler florett, and the idle is really really perfect, a response very good, but when i'm going to take a ride, the motor simply fails, and die :S i dont know what is it, maybe the gasket? I took off the old gaskets, and put some RSV sealante high temperature..

The spark plug is perfect - brown...

I would check to be sure the tank is venting and flowing properly. If the plug is brown, and idle is good, it's either fuel starvation, or the idle mix is great, and the other setting are way off. Maybe richen the low end a bit. I am not familiar with what carb you are using, although I'd love to have the bike it came off of.