Working on my solex mod

[dan filipi]

I disagree that idle has no effect above idle because of the transition that takes place going from pulling gas in from the idle circuit as it transitions into the next jet.
I do agree though trying to fix mixture above idle by changing idle jet, might be a wrong move.

On my Solex, I got idle very close then leaned the primary jet. There was a point which introduced a flat spot between idle and primary. Going up .05 in idle size, got rid of the flat spot.

My approach would be....get a good idle first, then work on the off idle mixture.
Once off idle then into primary are right, mixtures and transitions will line up like they should.

 

[rob.lafady]

Dan, do you know what kind of mileage your getting with your setup?

 

[joedrum]

rob.lafady » Mon Oct 19, 2015 3:47 pm[/url]":2mzih4mo]
Dan, do you know what kind of mileage your getting with your setup?

yes dan your right idle dose have effect on whats above idle ...i said it has nothing to do with the idle jet after that ....the adjustable screw jet also in the idle circuit im sure is used to get better off idle before main primary jet ...it looks to me he could have adjusted that and got rid of bog and no power off idle ...it adjust lke a mix screw it seems ...and then primary almost instantly takes over is how i see this carb working ...though im only looking at pictures that were posted in this thread could very well be wrong :thanks:

 

[dan filipi]

rob.lafady » Today, 12:47 pm[/url]":1qn7atpr]
Dan, do you know what kind of mileage your getting with your setup?

I'm getting 41 to 43 mpg.

 

[slabghost]

With todays gas and california mix too that is great mileage!

 

[Bilgerat]

Yeah I let myself get fixated on the idle jet. Will get the bike idling good again and then look at adjusting the main jet. :doh: :thanks:

 

[dan filipi]

Yeah the best I could get from the 32/32 dft was 36 mpg on this 1200 motor.

 

[Bilgerat]

will pull the main jet when i get home tonight and check the size and see if it was altered like the idle jet was

 

[brianinpa]

I think you will find 127.5 stamped on it.

 

[Bilgerat]

Well I found a 1 on the jet rest was obscured. However sizing with a welding tip cleaner( assuming smaller # means bigger cleaner it was a size 8 (or 22 if its vice versa) just need to convert that to an actual measurement and translate into a jet size

 

[brianinpa]

Obscured??? I have to use a magnifying glass just to read the small numbers in the first place. Add to it that numbers appear to be hand stamped and yeah, I can understand that they may be obscured. :smilie_happy:

 

[Bilgerat]

used the calipers at work to measure the tip cleaner and it came out to 1.25mm. So allowing for play its probably the 127.5. So what size should I drop it to?

 

[Bilgerat]

OK got a 112.5, a 120 and a 122.5 on order, should give me a good starting point

 

[dan filipi]

Not sure what my primary is exactly but it's definitely larger than 1.3
I'll post it when I get home.

Reminder to self, put this in my bike log forum.

 

[dan filipi]

I think anything below 1.35 will be too small because these are what I've arrived at:

Solex:
.35 idle
1.40 Primary

32/32 dft:
.50 idle
1.35 Primary
.95 Secondary

On the dft I have played with the air bleed also which may account for the smaller Primary.

 

[joedrum]

rule of thumb is 4 moves on air bleed jet equals one gas jet move ....air moves up in size leans things ..air bleed moves down riches charge

 

[joedrum]

carburetors today is like voo doo to most ...and most comment about them is usually way off target ....its really just a well controled spay bottle like mist adjusted to stay in consistent in its make up.....personally i like the weber dft set up ....i have modded mine to have many adjustments through out the rpm zone of a oldwing ....the solex has about 1/2 that many adjustments ...but im convince it can be adjusted in for oldwing ...i work on toms solex briefly ....i got it to idle and run fine ...but i never road tested it ...was at a meet and greet ....to full of beer for that.... :beer:

 

[Bilgerat]

Ok got my jets on Friday put in the 112 couldn't get above 45 mph, pulled that put in the 120, much much better but acceleration lags past 60 and hills it drops off and hard to maintain speed, so gonna try to put the 122 in during my lunch break and see how it goes on my trip home

 

[slabghost]

So progress is being made. That's a good thing. In light of where some others have ended. 1.22 might still be a bit small. Keep at it you're getting there.

 

[brianinpa]

opcorn:

I got the last O-rings for mine last night and finished with the rebuild, so I am going to be reinstalling it tonight/tomorrow night. I found so much rust and dirt in the bowl it was no wonder my bike was running so badly.


My idle jet is .35 and the main jet is now sitting at 1.30.