Shot carb, options please.

[Manx71]

Well, Im back home and just stripped my carb.

First off the float needle is sticking in its seat and the carb has a fuel flow issue.

Main jet is corroded, slide (throttle slide) is pitted

Needle is a gonner.

Am I better off just buying a new carb for almost the same price as the parts?

What about the Mikuni Conversions?

[orabanda]

Rob,
Contact Hitchcocks (excellent web site) & buy a new Amal. it will come with factory jetting to suit your bike, and your bike will start easily, and idle very smoothly!.

[Joolstacho]

I'd like to know about Mikuni conversions too. I've had too many Amals in my life.
I recently got a brand new Mikuni for my TY175 trials bike, for A$32 delivered to Oz. It's hard to think of throwing a few hundred on an Amal that I know will be prone to wear and distortion.
Currently my SR shares it's carb with my Venom. (Swapping). I have a worn Concentric, and a Monoblock 389 with a worn top main thread. If there was an economical repair option I'd do it.
But you have to admit, a new Mikuni at those sort of prices looks good.

[Manx71]

Ok, as a quick fix i just bought a new 389 direct from Amal.

[Manx71]

Err... 10- 12 week wait.

[metalflake11]

Err... 10- 12 week wait.

Order a Concentric?

[BSA500]

Autocycle recondition. Had mine bored new brass slide,new needle and jet all mating surfaces milled true and a gasket set £85. Worth thinking about 

[morris]

Err... 10- 12 week wait.

Royal Air Mail...? 

[Manx71]

A fella/Shop called Mark Boulten Is going to sort one out for me.

He can build one within a couple of days.

Fingers crossed.

:)

[Dean]

I'm running a Mikuni on my bitsa A10 and am very pleased. Mind you I also converted to electronic ignition so the easy start, smooth running and hard stops at traffic lights without the engine dying could be due to either

I got the Mikuni as a ready set-up kit from Allens in Bingham.

[Joolstacho]

Any chance of a rundown on the Mikuni specs, size, type, jetting etc?

[Manx71]

Got my amal from Hitchcocks today... I`ll sort it on saturday.

As for the Mikuni, I have bought a couple off Allens for my Lambrettas and they are very knowledgable.

Maybe next time for me.

[Manx71]

Hi Again Fellas,

Beautiful weather here this last weekend so I managed to 300km`s on the clock.

I think I maybe running a little rich.

It is very easy to start, but I dont have to tickle the carb or use any choke, so I think either my pilot jet is a little high or airscrew a bit to tight.

I also get a little popping in low revs. Ive never dabbled in 4 strokes before so I would like an opinion. Also the throttle responce is a tad wooly compared to what I think it should be. I think this is due to the fact that the needle might not be set propperly. at the mo its in second clip from bottom, does that sound right?

[duTch]

 Good to see you get out for a decent ride.
 Fairly sure normal needle setting is the middle, so 2nd from bottom would contribute to richness I think 1/4- 2/3? ( those more knowledgeable will say better)
 Mine's been popping a bit down low too, but gets better as it warms up (note to self,one remedy is don't go low revs )

 'Normal' pilot jet is 25

[Dean]

Any chance of a rundown on the Mikuni specs, size, type, jetting etc?

Sorry, only just seen your post. I'll see if I've kept a record (I'm not stripping it down!) as I bought it all set up by Allens. I did change the jet after getting the bike dyno'd mind (Note: never get your bike dyno'd, it only leads to disappointment)