More Carb help

[Bonz]

I did check the float heights by measuring with the tangs lightly touching the needle spring nub when the carbs were off the bike replacing needle seat and fuel screw o-rings before the rally.

#2 was higher than the rest, which were at 23mm +/- a scosche. Adjusted #2 down to 23mm and at least while sitting at an angle at the start of the luge, all heads are even height and alert... That's a hilarious analogy, by the way...

[motoman]

Have to agree with 3PHASE and Bonz on this one...........Just for grins, before leaving on trip WAY south tomorrow, I went and pick the brains of two shop bike mechanics that are friends of mine, one at a Honda stealer, other has his owm shop after decades od working at dealers.
Both were FACTORY trained on THESE particular scoots and others 'of the day'.
BOTH stated that just to eliminate any possible varience, carb bank is set at angle(BTW, it will do it on its own one direction), float height is measured with float tang j-u-s-t touching float needle, just to be sure there is no collapsing goin' on.........ther ya' go.........from two pros who do it for a living.
In the case of the 81(xs)-84(XJ), according to BOTH them, float levels are to set according to RUNNING fuel levels of 3mm down from upper carb body, and whatever it takes as far as static levels to achieve doesn't matter. The RUNNING fuel level is ALL that matters, and that all four be IDENTICALLY the same, period.
Also, any varience from that IS significant, even half a millimeter, and have proved that to myself from all the experimenting with this issue, so I have no issue proving the same to anyone who would challange that.
Meanwhile, you'all keep havin fun here.

This applies to the later BS34 carbs ONLY..........the early BS34's are so forgiving having the cross-over tunnel, 'close is good enough'........and if you'll actually READ the varience given of the static float level settings, you'll see that.........not so much for the later carbs.

[BA80]

I'll be having fun in North Carolina in about 6 weeks with my poor connections, improperly set floats, and mixture screws I have no idea how many turns they are out.

Care to join me?

Just rolled in from KC with a couple more bikes. A LG project and a FJ parts bike. Thanks Bigfoot.

I'll get some pics and such tomorrow. Been running since 5 this morning and I'm whipped

[3Phase]

Stereo, when setting float heights in carburetors I prefer to use a Genuine Japanese bamboo cane pole in my hat with silk thread, those new-age glass or carbon fiber rods with plastic line aren't as accurate!

Brant, that's another example that explains why, besides being a broke b... curmudgeon, I won't take anything to a dealership for work. The FSM explains how to work with new or used OEM parts. How can that possibly go wrong?

Just for grins, make up some imaginary carburetors and run it out!
Floats weigh 4oz with a volume of 5ci
Float valve needle preload tip has a 4oz spring
Float height is 1"
Fuel level will be 1/8" (and won't be mentioned or spec'd until the fourth model-year)


Charlie the 3rd Shift Wonder Chimp down at RodBenders-R-Us is the shop's best MSCT Mechanic (Mixture Screw Turn Counter) and he gets his paws on your carburetors. After soaking the carbs overnight before cleaning them, Charlie decides to go the extra furlong that fortnight and replace some of the parts.

Charlie's a bold Bonobo but he's highly trained and factory certificated so he sets the float heights upside down and sideways, sort of by the book but a little different from the actual pictures and instructions because the only most important thing is that the float tangs just barely touch the float needle preload springs and never compress them!


Of course Charlie's kin made the new parts and they're not 4oz/5ci floats with 4.oz needle preload springs but they are shiny and they drop right in so it's all good.

#1) 4.20 oz preload spring with a 3.1oz/4ci pattern float
#2) 10 oz preload spring with a 3.1oz/4ci pattern float
#3) 2 oz preload spring, with a 3.2oz/4ci pattern float
#4) 4 oz preload spring with a 3.1oz/4ci original float

Springs at four-twenty, ten, two, and four; lighter and smaller floats.
The float height is set to 1" but the fuel levels are not 1/16".

.

[3Phase]

... with my poor connections, improperly set floats, and mixture screws I have no idea how many turns they are out.

Care to join me?

<rolling on floor, laughing>

.

[motoman]

Stereo, when setting float heights in carburetors I prefer to use a Genuine Japanese bamboo cane pole in my hat with silk thread, those new-age glass or carbon fiber rods with plastic line aren't as accurate!

Brant, that's another example that explains why, besides being a broke b... curmudgeon, I won't take anything to a dealership for work. The FSM explains how to work with new or used OEM parts. How can that possibly go wrong?

Just for grins, make up some imaginary carburetors and run it out!
Floats weigh 4oz with a volume of 5ci
Float valve needle preload tip has a 4oz spring
Float height is 1"
Fuel level will be 1/8" (and won't be mentioned or spec'd until the fourth model-year)


Charlie the 3rd Shift Wonder Chimp down at RodBenders-R-Us is the shop's best MSCT Mechanic (Mixture Screw Turn Counter) and he gets his paws on your carburetors. After soaking the carbs overnight before cleaning them, Charlie decides to go the extra furlong that fortnight and replace some of the parts.

Charlie's a bold Bonobo but he's highly trained and factory certificated so he sets the float heights upside down and sideways, sort of by the book but a little different from the actual pictures and instructions because the only most important thing is that the float tangs just barely touch the float needle preload springs and never compress them!


Of course Charlie's kin made the new parts and they're not 4oz/5ci floats with 4.oz needle preload springs but they are shiny and they drop right in so it's all good.

#1) 4.20 oz preload spring with a 3.1oz/4ci pattern float
#2) 10 oz preload spring with a 3.1oz/4ci pattern float
#3) 2 oz preload spring, with a 3.2oz/4ci pattern float
#4) 4 oz preload spring with a 3.1oz/4ci original float

Springs at four-twenty, ten, two, and four; lighter and smaller floats.
The float height is set to 1" but the fuel levels are not 1/16".

.

Your havin' way more fun that tech. oughta' be legal......and your not even in Colo..