JS flat slides

Have these been deleted from the JS range?

Looks like it Dkt26, I still like my single w/ manifold that I got from him though, It works well for the state of tune that my bike is in at the moment.....but I must admit, those CR's he's working on look real good !

Well that's disappointing after having bought a set just last year.
No, It doesn't change how they function but it would be nice to know that when I buy a "turn-key" carb setup that it will be supported and improved in the future. Not abandoned.
Not exactly sure what I do now if I need parts. Weren't the spray tubes + needles specially modified by Jim?

Don't know him personally but highly doubt you should feel "abandoned" just cuz he's found some reason to use something else.

You misread my post.
I wrote that it appears he abandoned the line of carbs, not me.
I realize I can probably buy standard parts (gaskets, jets, etc) from Sudco or one of the other Norton parts sellers who offer the PWK carbs for Brit bikes.
Just concerned there may be unique parts (spray tubes, needles) in the carbs, and that any future refinements provided by Jim will stop.

On my website it says "Support for PWK Flatslide carbs will continue for existing customers." Parts and support are available for those who contact me.

And I am still selling them on special order. And I am still getting orders for them and sending them out. But I am not advertizing them. A lot of work goes into the PWKs to make them run right on Commandos including increasing the fuel flow to the bowl so the don't starve at WOT. There are a dozen modifications, checks and tests I must make to each carb and its very labor intensive. Now I am also going to the trouble of testing each set on my test bike before sending them out.

Personally I will always use them on my own bike because they are the smallest 32 or 34mm flatslides you can get. They fit perfectly and they run fantastic (with the JSM modifications). Mark - I think you can testify as to how they run. But I want to offer something that takes less setup/modifications and not have to spend so much time on customer support with customers who cannot syncronize.

So I am advertizing the Keihins because they have one throttle cable for both carbs. The slides are mechanically linked and pre-syncronized. It might not be perfect but it will at least be close enough for satisfactory riding and the customer can perfect the sycronization later if they are capable. My biggest problem was with customers who couldn't syncronize and so they were unable to tune them. My hope is that with the pre-syncronised Keihins the tuning process will be much easier for customers. At least I won't have to worry about them being synced and the customer can just concentrate on going richer or leaner.

Another reason is because the Keihin CRS carbs are legal for AHMRA Bears and F 750 classic racing but flatslide carbs are not.

Jim,

Thanks for the clarification.

Didn't mean anything personal Mark, no harm no foul. Truth is I've teased around the idea of buying a set too, which usually means "Me & I" have made the decision just haven't persuaded "Myself" to relinquish the funding yet!! Glenn T.S.

gtsun said:

Didn't mean anything personal Mark, no harm no foul. Truth is I've teased around the idea of buying a set too, which usually means "Me & I" have made the decision just haven't persuaded "Myself" to relinquish the funding yet!! Glenn T.S.

Click to expand...

No worries Glenn.
Looks like your decision regarding the flat slides has resolved itself.
I'm sure the Keihins are very nice but I'm too damn cheap to drop that many scheckles on carbs.

I don't think you have to worry about Jim, he has helped me a few times when I brought my PWKs Flatslides a few years ago now and he has good customer service and always will help when asked, I be keeping my Flatslide carbies for now as my Norton runs so well with then and hopefully will get many more years of trouble free riding out of these carbies, in 5 years I have only tuned them once so not bad at all.

Ashley

gtsun said:

Didn't mean anything personal Mark, no harm no foul. Truth is I've teased around the idea of buying a set too, which usually means "Me & I" have made the decision just haven't persuaded "Myself" to relinquish the funding yet!! Glenn T.S.

Click to expand...

I have a full twin 34mm setup fs for $400US shipped

Ditto what Ashley said. Great support, carbs work great.

I sync them with a two equal length pieces of welding wire or coat hanger wire, say 6" each. Stick the two pieces of dead straight wire under the slides' cutaways until the touch the back of the slide - equal distance in - and watch the ends of the two wires as you crack the throttle - they should both start to move at exactly the same moment and . . . . as you roll the throttle on to 1/4 and 1/3 open, the tips of the two wires should continue to drop, side by side, in synch.

Sometimes after you synch them but then you un-synch them when you tie down the cables with zip ties. So . . . .
You may have to play with the routing of the cables, the cables themselves, the cable ferrules, and the junction box to get them all to align so that the two slides exactly synch from start and then hold that sync through the whole range of slide lift.

Of course, there must be some cable slack to allow for the movement of the steering head but that may also create enough slack for the cables to jump out of their junction ferrules and get stuck outside of those ferrules. This may require judicious placement and use of zip ties and even glue or tape to ensure tight and straight ferrule/cable junctions.

Vacuum gauges are pretty easy to use and not that expensive. Don't they work on a Norton?

Feeler gauge (wire?) will get you in the ball park but there can be slight differences between carbs that vacuum syncing should pick up.

Sure they do AND - if your slides are synched - they can be used to tell you about the relative status of your valves and rings too.

Still, two pieces of wire are dead cheap, dead simple, and for synching carb slides . .. . fool proof.
The leverage, the amplification of any difference in the moment and extent of lift, provided by the wires, tells more than just looking at the two slides, assuming you can get a view of both at the same time. Maybe 1" of wire under the slide is multiplied by the 5" outside of the slide.