CV Carb mod to replace plastic washers, which locate under needle circlip that wear out.

[jonny1bump]

Many moons ago I designed and posted a mod on the old site a really good improvement that could be made on the cv carbs.

Basically the plastic washer under the needle wears significantly through rotation and if they do no rotate they groove severely. 

Also the way slide is designed with a step so the plastic washers causes the needle to sit at an angle causing even more wear on the Suzuki emulsion tube top area causing ovality and richness, which is compounded even more if using rubbish designed dynojet emulsion tubes.

These aluminium spacers replace the plastic washers and hold needles firm and square. They are fiddly to make but worth the effort.

Searching through old drawings found my original design. Unfortunately cannot find my original pictures.

Will have to find where put old carbs and take them apart.

There was streetfighter site of some sorts that must got my original drawing and started making them, UKLee pointed this out when we were building one of his projects.

 

Edited November 15, 2018 by jonny1bump

[jonny1bump]

Not sure if want make this a sticky too.

Rene did promise ages ago would post stuff just taken me a while.

 

[jonny1bump]

Anyway here is pic bear with me for actual carb pics unless can be found from original site.

[jonny1bump]

[jonny1bump]

[jonny1bump]

[wsn03]

Can anyone make a set of these? Great mod thank you

[Blue]

Like this 

[jonny1bump]

Brilliant nice picture that's saved me a job.

I can make them but fiddley on my manual stuff at home and not got much free time.

Let me have word with mate down south if peeps want some for a batch build or something.

Edited November 16, 2018 by jonny1bump

[Swiss Toni]

It's a great mod. I said years ago, it should be 'stickied'. I still think so! Thanks for taking the time to put it up again!

Edited November 16, 2018 by Swiss Toni

[wsn03]

Yes big thanks. This is such a no brainer. 

I bet a batch of 100 would go.

@jonny1bumpyes please if you could that would be extremely helpful. Thank you 

[Blubber]

3d print them? 

 

We have a new best friend on this site who has 2 3d printers

[wsn03]

@Captain Chaosi hate to ask twice for a sticky but...this is such a valuable mod could it be stickied? 

[Kurf]

44 minutes ago, wsn03 said:

Yes big thanks. This is such a no brainer. 

I bet a batch of 100 would go.

@jonny1bumpyes please if you could that would be extremely helpful. Thank you 

Interested in let’s say 4 or 8 ....if someone makes them.

[wsn03]

40 minutes ago, Blubber said:

3d print them? 

 

We have a new best friend on this site who has 2 3d printers

That would be really helpful if jonnybumps mate cant help.

I guess see what Jonnybump comes back with?

[jonny1bump]

I personally prefer them to be ally they never wear out.

If we can get a running total I can ask for quote to set Cnc up. I don't mind making couple myself but can see this exploding lol.

Got me thinking perhaps I even put his engineering business in trade section.

So 12 so far is that correct. Need get list going not sure how do that on a forum chat.

[Askamaskinservice]

1 hour ago, Blubber said:

3d print them? 

 

We have a new best friend on this site who has 2 3d printers

As said by Jonny1bump ally is to prefer as you would get petrol and ethanol on that part too.

Probably could do them in PETG, but a CNC setup to do 100's in Ally is the way to go.

I can ask too.

Edited November 16, 2018 by Askamaskinservice

[Ben Slabby]

Afaik SI Francis does sets of these to order too. 

Edited November 16, 2018 by Ben Slabby

[Blubber]

58 minutes ago, jonny1bump said:

I personally prefer them to be ally they never wear out.

If we can get a running total I can ask for quote to set Cnc up. I don't mind making couple myself but can see this exploding lol.

Got me thinking perhaps I even put his engineering business in trade section.

So 12 so far is that correct. Need get list going not sure how do that on a forum chat.

Start a poll, with a vote counter? 

[wsn03]

26 minutes ago, Blubber said:

Start a poll, with a vote counter? 

Im trying but cant do it from my phone. I'll add one from lap top shortly 

[jonny1bump]

Initial pricing I have is roughly 25 a set but this is 4 off will reduce more peeps that won't them to cover set up cost.

[nopokewithoutsmoke]

Do these fit all (Suzuki) Mikuni CV carbs?

[jonny1bump]

That is good question not actually sure. Would need have look inside see if step is there first, if so would say so but pays to measure.

[wsn03]

2 hours ago, jonny1bump said:

Initial pricing I have is roughly 25 a set but this is 4 off will reduce more peeps that won't them to cover set up cost.

I'll add that to the poll

[wsn03]

Thankyou for pinning this thread