The PZ30B "Pumper" thread.

[NzBrakelathes]

I ordered some carbs, jets cables and throttle parts - I will post soon a link etc if that is OK?

[NzBrakelathes]

Originally Posted by China Rider 27

I agree YOU ALL! The ali-express combined kit looks to be the way to go and I tried to order it couple months ago using my credit card and aborted it in hesitation, however they got my credit card info and immediately charged fradulent charges requiring I cancel my card. The only way to purchase on this site securely seems to be by Western Union wire transfer that I can figure out. What am I missing about ordering securely from Ali-express?

The carb package is listed on ebay at $59.00 and stand alone for $42.00.

Just to have all the options here is the link.

https://www.ebay.com.au/itm/PZ30-30m...AAAOSwGIZcCU88

And $59.00

https://www.ebay.com.au/itm/PowerZon...IAAOSwtjhb9TOn

I was not going to spend the extra $20.00 but it was tempting!

If your'e not in a great hurry wait till my items turn up etc, I am adding parts in to make a kit and much more options etc.
Input as to what should be there is listened too.
Jets and pilot jets everything you should need will be included as well as option to have manual or cable choke etc.

[Wild Dog]

So i got a used PZ30b for about 3 usd dollars. Of course i need to rebuild/rekit it.
So i wonder what kind of kit i need??

[Megadan]

Originally Posted by NzBrakelathes

I ordered some carbs, jets cables and throttle parts - I will post soon a link etc if that is OK?

Yeah, feel free to include a link or two to parts for this carb. It's on topic. I thank you for asking though, very respectful.

[Megadan]

Originally Posted by Wild Dog

So i got a used PZ30b for about 3 usd dollars. Of course i need to rebuild/rekit it.
So i wonder what kind of kit i need??

Most of that stuff doesn't actually look that bad and could be cleaned up. Most of the parts you can use a standard PZ30 kit for. If the accelerator pump diaphragm is torn it might take a little searching. I haven't looked too hard for the parts myself, but it would be a good idea to figure out where to get them from.

[Kivi]

I have a question about the pumper carbs. Does the additional fuel from the pumper circuit lasts only one time or the circuit is active as long as the throttle is twisted?
Does the circuit gives one dose of fuel or maybe vacuum sucks the fuel through pump circuit even after the pump has injected the fuel dose?

[Megadan]

Originally Posted by Kivi

I have a question about the pumper carbs. Does the additional fuel from the pumper circuit lasts only one time or the circuit is active as long as the throttle is twisted?
Does the circuit gives one dose of fuel or maybe vacuum sucks the fuel through pump circuit even after the pump has injected the fuel dose?

That is a great question. Generally speaking an accelerator pump only adds fuel during the initial throttle application, and even then only when the throttle opens at a fast enough rate for the diaphragm to push the fuel out of the nozzle and not just back into the bowl - which is how it is supposed to work.

I guess in technical terms the nozzle could add a teeny weeny level of fuel al the time since it is an open circuit to airflow, but it wouldn't be anywhere near enough to have any appreciable affect. The hole on the end of the nozzle is so small I couldn't really get a good picture of it, if that gives you a good idea. It is literally a pin hole.

[NzBrakelathes]

Originally Posted by Kivi

I have a question about the pumper carbs. Does the additional fuel from the pumper circuit lasts only one time or the circuit is active as long as the throttle is twisted?
Does the circuit gives one dose of fuel or maybe vacuum sucks the fuel through pump circuit even after the pump has injected the fuel dose?

Remember old school Holley carbs? With accelerator pumps? It just “spits in” a shot of extra fuel on hard acceleration

[NzBrakelathes]

Originally Posted by Megadan

That is a great question. Generally speaking an accelerator pump only adds fuel during the initial throttle application, and even then only when the throttle opens at a fast enough rate for the diaphragm to push the fuel out of the nozzle and not just back into the bowl - which is how it is supposed to work.

I guess in technical terms the nozzle could add a teeny weeny level of fuel al the time since it is an open circuit to airflow, but it wouldn't be anywhere near enough to have any appreciable affect. The hole on the end of the nozzle is so small I couldn't really get a good picture of it, if that gives you a good idea. It is literally a pin hole.

I took mine apart n it has 2 check valves with a tiny spring and ball - so it loads n unloads each cycle etc

[NzBrakelathes]

As a set a 1 stop place what would you think is the best way to purchase a kit? with what options etc?

PZ30B with fuel line and filter (non cable style)
Dual cable and fast throttle (Not TT250 suitable)
Hand grips
Pilot Jets 42 45 48 50 (I'm assuming after 1st tune kit or should I change that?)
Main jets 103 108 118 (these are in between sizes to 1st tune kit)

Option to buy with the kit a choke cable and bracket for carb

More jets in case folk didn't start with the 1st tune kit?

Also there are possible options to just use stock style quick turn throttle (I'm not sure if Hawk etc stock is what I am use to being stock)

I have a dual cable that MIGHT suit the TT250 so there's a possibility for TT250 owners.

Also quick turn/1/4 turn throttle has the ability to be used on stock PZ30 carb (cable and throttle part) Could even add a choke cable to this set up.

So many options!

[Wild Dog]

Well i was able to get a rebuild kit for the P30B. At first i was afraid of the price, because the last kit i bougth was for an original VM26ss, the float alone cost me 30 usd for that thing, because it was not common...

But lucky me, the whole kit for a P30B, was just 2 USD so i got one for the CG200.



It came with everything to refurbish it.



I was a bit afraid to remove the top part of the main jet, but with a plastic punch i was able to take it off with ease.




The new part was a bit longer, but it did fit right.




Refurbished

[NzBrakelathes]

CSC TT250 guy are they much into mods for PZ30B carb?
I've looked into the cable for that style of switch gear but the solution I got is just OK and needs fiddling to work etc.
Really it needs a correct style cable with the elbow and fitting into the switch gear correctly and correct length inner cable.

Worst case could be different switch gear without the A1 A2 but that kinda isn't the nicest way.

I managed to find 'good enough" solution with some DIY required to make it work "fine" or best I can without the actual bike (Used RX3 switch gear to test fit)

[NzBrakelathes]

Originally Posted by JerryHawk250

I've ordered a few items from Aliexpress using my credit card with no issues. On the other hand it's worth the extra money to be protected my Ebay and use paypal for extra protection. Personally I would save the $20 and get it without the throttle.

I have 2 versions of plastic tube/throttle that go into the basic stock housing, 1 is a 1/4 turn part and works fine etc - cheaper option over the smoother extra 1/4 throttle.

The Hawk etc might already have a "fast throttle" or 1/4 turn style in it, if not it can be changed without buying a whole new thing.

[China Rider 27]

If you are looking or a Keihin style pilot jet do not buy this Powerzone carburetor.

https://www.ebay.com.au/itm/PZ30-30m...AAAOSwGIZcCU88

[Azhule]

"Dual Cable PZ30B Pumper Carb" does not fit on the Bashan WILL 200 or other similar framed bikes

I'm a sad Panda today

Anyone in my area need a PZ30B let me know... I never actually used/filled the PZ30B with gas but I did clean and lube it up (MMO and Neutra 131 mix) getting it ready for service on my Bashan... and I quickly found that the "pumper cable mounting bracket" hits the right side frame no matter what you do