Nibbi PE28FL

Megadan · 03-17-2022, 03:19 PM

Yep, trying yet another new carb on my Hawk. But this time, I think I will have found the happy middle ground.

When I swapped the PZ30B back on my bike, I could tell I lost a little power up top. Not a ton, but it felt a little held back. What I liked was the better state of tune, idle, and less sensitive nature of the carburetor when the climate changed. It also fit better all around, IE the throttle cable wasn't getting presse into the tank and being kinked over.

What I loved about the PE30 was how easy it was to tune things like the idle mixture, the idle speed, and the responsive nature.

I came across this flanged PE28. https://www.amazon.com/dp/B09KXTVTGR...roduct_details

It will flow better than the PZ30. But being 28mm should maintain better velocity than the PE30, and it bolts up to the stock style intake, so fitment issues will be a thing of the past.

I have even considered ordering a TT250 airbox and making an intake tube to run an airbox again, modified slightly with a pod filter inside. But that is for another day.

The only real challenge I have now is just having the time to install and tune it as I am taking some classes on my off days, so I have little free time to work with.

**JerryHawk250** · 03-17-2022, 03:27 PM

Thanks Dan! I just added that one to my wish list. Like I need more to do. lol I think that will be the perfect carb for these bikes. I like that it has the flange mount.

China Rider 27 · 03-17-2022, 03:59 PM

No doubt! That flange mount is a game changer!

Megadan · 03-18-2022, 02:42 AM

Quote:

Originally Posted by JerryHawk250

Thanks Dan! I just added that one to my wish list. Like I need more to do. lol I think that will be the perfect carb for these bikes. I like that it has the flange mount.

Always glad to help fuel addictions that I share with people lol.

I agree though, I think these are probably the best matched carb for a CG250. total area of the 28mm bore is still larger than the PZ30 venturi, and without the choke plate and venturi it will definitely flow more air and with less turbulence. All without the velocity drop of the PE30, which I think is a bit wasted without a higher lift cam and/or the CG300 cylinder.

Best of all is the fact that it uses the stock style intakes, which means it eliminates all of the fitment issues I have had with the socket style carbs on my bike.

Also, if you don't mind having just a regular silver carburetor they also sell one in a more natural finish and its about 14 bucks less.
https://www.amazon.com/dp/B0925SM1S4...NsaWNrPXRydWU=

The nice thing is, I have even found a little jetting information for a CG motor, and from what I can tell it's well within the same jetting as the PZ30, so I should be close just swapping over my PZ30 jetting to this carb.

China Rider 27 · 03-18-2022, 09:08 AM

I put a PE 28 on my HAWK last fall. I could not believe the manifold issues. I must have bought 6 manifolds and none of them would work. This carburetor would have made it easy peasy. NIBBI got smart or maybe that was a production carb they offered up to all.

Dusman · 03-18-2022, 09:55 AM

Thanks Dan,

Fitment issues with an intake manifold are what have kept me from using a Nibbi thus far. Now, problem solved!

Thumper · 03-18-2022, 11:23 AM

I have this stupid rule of spending as little as possible on the bike. I had to get tires and jets, but I like the idea of knowing how little I had to spend to have such a great bike...This might be an exception

It looks good Dan.

The old goofy flange adapter for the hose/clamp mounting style NIBBI carb interface takes a few inches and places the carburetor far from the engine, likely causing direct carb contact with the frame tube, and pushing the carb off center... Based on what I've seen, the carb doesn't fit straight on the hose on a Brozz 250, probably most/all CG engine clone full size dirt bikes we discuss here. It is not only crooked on the hose, but also the float bowl is cockeyed. Having a straight through air path and a nearly level float bowl must have an impact on performance!

So this new flange mount on the PE28FL is not only an ease of installation improvement, but it will mount right.

From what I have seen in videos, the NIBBI PE series seem to have the pilot and main jets in the same position in the carb body as the PZ30. But I DON"T see a pilot adjustment screw

And exactly what is that choke plunger doing down in there? I wonder how that works for enrichment. One of those side ports? Well, no butterfly valve for choke is definitely better for smoother air flow through the carb body. That's excellent.

The big knurled wheel on the slide column will make idle adjustment EASY (slide height)! That is nice. And it comes with a manual/setup guide. How unique

Most clones arrive with no documentation (after all...doesn't everyone already know how to jet/adjust a carb, well, no!)

I think the NIBBI takes a Keihin needle so you can select different tapers, and set needle with the circlamp and fine adjust with washers (NICE!).

**JerryHawk250** · 03-18-2022, 11:31 AM

Quote:

Originally Posted by Thumper

From what I have seen in videos, the NIBBI PE series seem to have the pilot and main jets in the same position in the carb body as the PZ30. But I DON"T see a pilot adjustment screw

The big knurled wheel on the slide column will make idle adjustment EASY (slide height)! That is nice. And it comes with a manual/setup guide. How unique

Most clones arrive with no documentation (after all...doesn't everyone already know how to jet/adjust a carb, well, no!)

The idle mixture screw is just to the left of the idle speed screw. The idle mixture screw is for air vs fuel that's on the PZ30 so keep that in mind when tuning.

Megadan · 03-18-2022, 02:48 PM

Quote:

Originally Posted by China Rider 27

I put a PE 28 on my HAWK last fall. I could not believe the manifold issues. I must have bought 6 manifolds and none of them would work.

Quote:

Originally Posted by Dusman

Fitment issues with an intake manifold are what have kept me from using a Nibbi thus far. Now, problem solved!

The fitment issues were honestly the most frustrating part. I was getting to the point of wanting to 3d print an adapter for a straight socket, but even that would have had issues unless I angled it right. Then there was always the potential issues of long term degradation of fuel and heat on said plastic. I also probably bought 6 intakes trying to get other carbs to fit. The best one I came up with was the CQR intake, but it was also the longest of the bunch, so it positioned the carb far enough out to cause interference issues with the tank and throttle cable. I never could win.

Quote:

Originally Posted by Thumper

From what I have seen in videos, the NIBBI PE series seem to have the pilot and main jets in the same position in the carb body as the PZ30. But I DON"T see a pilot adjustment screw

And exactly what is that choke plunger doing down in there? I wonder how that works for enrichment. One of those side ports? Well, no butterfly valve for choke is definitely better for smoother air flow through the carb body. That's excellent.

The big knurled wheel on the slide column will make idle adjustment EASY (slide height)! That is nice. And it comes with a manual/setup guide. How unique

Most clones arrive with no documentation (after all...doesn't everyone already know how to jet/adjust a carb, well, no!)

I think the NIBBI takes a Keihin needle so you can select different tapers, and set needle with the circlamp and fine adjust with washers (NICE!).

As Jerry said, the idle mixture screw is on the side of the carb, and unlike the PWK carbs, the RIGHT side of the bike, so it is super easy to adjust. No more burning hands, special wonky tools, or having to remove the carburetor.

The choke plunger is just an enrichment circuit. You pull it open and the vacuum difference draws fuel up from the bowl. About as simple as it gets.

Yes, the big idle speed adjustment knob is the other great feature of this carb. That is one thing about the stock carb they got right too. It's easy to find with gloves on and no need to fiddle with a screwdriver.

The Nibbi carbs also do take Keihin needles if needed. I found the one in the PE30 actually worked ok so I never had to change it, but real PE needle options also work on these. These are higher quality clones.

OffRoadToad · 03-18-2022, 12:29 PM

had a PE26FL in my cart for too long and missed it. Kinda bummed, I'm betting it will be a while before I see them in stock again. Really do not want to have to use a rubber flange with the regular PE26.
Carb/intake space is kind of a premium on my smaller bike. Not to mention dicking with getting the manifold to fit right. Its a Z20 max with an actual airbox.

XLsior · 03-18-2022, 06:59 PM

Seems the fist link is currently unavailable.
Second link still has stock.

tried to find them on Ebay/Alixpress...no show.

Im tempted but they are $88 shipped to Australia...maybe I can justify signing up to prime again and save a bit on shipping.

The side enrichment screw for me is the key selling point. Also the fact the PZ30B didn't fit with my XL frame making it a non B to work and I'm kinda over the raised choke cable makes this flange Nibbi very appealing.

Kinda wish the red and black version was still in stock to match my bike.

Very tempting.

What are the thought regarding the PE28 and a CG300 cylinder...
I have preemptively ordered a 'big bore' while still available on alixpress.

Megadan · 03-18-2022, 07:09 PM

Quote:

Originally Posted by XLsior

Seems the fist link is currently unavailable.
Second link still has stock.

tried to find them on Ebay/Alixpress...no show.

Im tempted but they are $88 shipped to Australia...maybe I can justify signing up to prime again and save a bit on shipping.

The side enrichment screw for me is the key selling point. Also the fact the PZ30B didn't fit with my XL frame making it a non B to work and I'm kinda over the raised choke cable makes this flange Nibbi very appealing.

Kinda wish the red and black version was still in stock to match my bike.

Very tempting.

What are the thought regarding the PE28 and a CG300 cylinder...
I have preemptively ordered a 'big bore' while still available on alixpress.

I have a feeling a few guys here placed orders. The black one was low stock when I ordered it.

With the 300 cylinder the PE30 might work better, but the 28 would still be a good carb for it. Only a 21cc increase on a low flowing head.

XLsior · 03-18-2022, 08:08 PM

Seems Amazon.au still have the red/black version in stock...

https://www.amazon.com.au/Motorcycle...=XUG0IMIV9ZNR&

Just ordered mine..hopefully the in stock indication is legit.

Whole lot of $140aud beans for a side screw enrichment and shiny knobs (performance improvements are noted)...but I still have the PZ30 as cg300 spare/backup if required.

Megadan · 03-18-2022, 10:05 PM

Quote:

Originally Posted by XLsior

Seems Amazon.au still have the red/black version in stock...

https://www.amazon.com.au/Motorcycle...=XUG0IMIV9ZNR&

Just ordered mine..hopefully the in stock indication is legit.

Whole lot of $140aud beans for a side screw enrichment and shiny knobs (performance improvements are noted)...but I still have the PZ30 as cg300 spare/backup if required.

Take it from me. The quality of the Nibbi carbs also justifies the extra beanage. They are that next step up.

Megadan · 03-19-2022, 02:02 AM

Delivery person dropped off my package today.

So for the details on this carb.

It comes shipped with 2 gaskets, a thermal plastic spacer, 4 main jets and 2 pilot jets in total. The jet sizes are actually damn near spot on for a CG250 with basic bolt on mods.

I don't plan on using the spacer since the Hawk intake is partly insulated with rubber, but I do plan to keep it for a future gasket template.

Main Jet sizes are 108, 110, 112 (installed), and 115

Pilot Jet sizes are a 35 and a 40 (installed)

As far as I can tell everything else about this carburetor is the same as the PE30. Same slide, same needle. same basic carb body other than the flanged end, just a smaller bore. In theory if you really wanted to you could bore this carb out to a 30mm and create a flanged PE30. I just need a chance to compare the two side by side, but my assessment is pretty confident on that.

Honestly, the only real hiccup I see with this carb bolting up is the flange itself is a bit thicker than the PZ30 carburetor, so either longer studs will need to be installed, or the studs removed and appropriate length bolts used. If that is honestly the worst thing I have to deal with on this carburetor, it will be a blessing compared to the issues I had with the rest of them.

Pictures on Page 2.

03-17-2022, 03:19 PM	#1
Megadan Join Date: Apr 2017 Location: Omaha, NE Posts: 7,990	Nibbi PE28FL Yep, trying yet another new carb on my Hawk. But this time, I think I will have found the happy middle ground. When I swapped the PZ30B back on my bike, I could tell I lost a little power up top. Not a ton, but it felt a little held back. What I liked was the better state of tune, idle, and less sensitive nature of the carburetor when the climate changed. It also fit better all around, IE the throttle cable wasn't getting presse into the tank and being kinked over. What I loved about the PE30 was how easy it was to tune things like the idle mixture, the idle speed, and the responsive nature. I came across this flanged PE28. https://www.amazon.com/dp/B09KXTVTGR...roduct_details It will flow better than the PZ30. But being 28mm should maintain better velocity than the PE30, and it bolts up to the stock style intake, so fitment issues will be a thing of the past. I have even considered ordering a TT250 airbox and making an intake tube to run an airbox again, modified slightly with a pod filter inside. But that is for another day. The only real challenge I have now is just having the time to install and tune it as I am taking some classes on my off days, so I have little free time to work with. __________________ Hawk Information and Resource guide: http://www.chinariders.net/showthread.php?t=20331 2018 Hawk 250 - Full Mod list here. http://www.chinariders.net/showpost....62&postcount=1 2024 Royal Enfield Shotgun 650 https://chinariders.net/showthread.php?t=34124
	5

03-17-2022, 03:27 PM	#2
JerryHawk250 Moderator Join Date: Oct 2016 Location: Houma, La. Posts: 11,554	Thanks Dan! I just added that one to my wish list. Like I need more to do. lol I think that will be the perfect carb for these bikes. I like that it has the flange mount. __________________ 2023 Lifan Lycan 250 Chopper 2023 Venom Evader 2022 Lifan KPX250 2020 Kawasaki Vulcan S 2004 Honda ST 1300 2016 Black Hawk 250 (sold) Keihin PE30 carb,125 main,38 slow.Pod filter,ported & decked head 10:1 CR,Direct Ignition Coil,15/40Sprockets,NGK DPR8EIX-9,De-Cat,Dual Oil Cooler,Digital Cluster 2016 Cazador180 XL 2014 Coolster150 JerryHawk250.com My YouTube Channel
	3

03-18-2022, 11:23 AM	#7
Thumper Join Date: Feb 2021 Location: Kansas City Posts: 2,268	close quarters-room for the Nibbi Carburetor I have this stupid rule of spending as little as possible on the bike. I had to get tires and jets, but I like the idea of knowing how little I had to spend to have such a great bike...This might be an exception It looks good Dan. The old goofy flange adapter for the hose/clamp mounting style NIBBI carb interface takes a few inches and places the carburetor far from the engine, likely causing direct carb contact with the frame tube, and pushing the carb off center... Based on what I've seen, the carb doesn't fit straight on the hose on a Brozz 250, probably most/all CG engine clone full size dirt bikes we discuss here. It is not only crooked on the hose, but also the float bowl is cockeyed. Having a straight through air path and a nearly level float bowl must have an impact on performance! So this new flange mount on the PE28FL is not only an ease of installation improvement, but it will mount right. From what I have seen in videos, the NIBBI PE series seem to have the pilot and main jets in the same position in the carb body as the PZ30. But I DON"T see a pilot adjustment screw And exactly what is that choke plunger doing down in there? I wonder how that works for enrichment. One of those side ports? Well, no butterfly valve for choke is definitely better for smoother air flow through the carb body. That's excellent. The big knurled wheel on the slide column will make idle adjustment EASY (slide height)! That is nice. And it comes with a manual/setup guide. How unique Most clones arrive with no documentation (after all...doesn't everyone already know how to jet/adjust a carb, well, no!) I think the NIBBI takes a Keihin needle so you can select different tapers, and set needle with the circlamp and fine adjust with washers (NICE!).
	0

03-19-2022, 02:02 AM	#15
Megadan Join Date: Apr 2017 Location: Omaha, NE Posts: 7,990	The Carb has Arrived! Delivery person dropped off my package today. So for the details on this carb. It comes shipped with 2 gaskets, a thermal plastic spacer, 4 main jets and 2 pilot jets in total. The jet sizes are actually damn near spot on for a CG250 with basic bolt on mods. I don't plan on using the spacer since the Hawk intake is partly insulated with rubber, but I do plan to keep it for a future gasket template. Main Jet sizes are 108, 110, 112 (installed), and 115 Pilot Jet sizes are a 35 and a 40 (installed) As far as I can tell everything else about this carburetor is the same as the PE30. Same slide, same needle. same basic carb body other than the flanged end, just a smaller bore. In theory if you really wanted to you could bore this carb out to a 30mm and create a flanged PE30. I just need a chance to compare the two side by side, but my assessment is pretty confident on that. Honestly, the only real hiccup I see with this carb bolting up is the flange itself is a bit thicker than the PZ30 carburetor, so either longer studs will need to be installed, or the studs removed and appropriate length bolts used. If that is honestly the worst thing I have to deal with on this carburetor, it will be a blessing compared to the issues I had with the rest of them. Pictures on Page 2. __________________ Hawk Information and Resource guide: http://www.chinariders.net/showthread.php?t=20331 2018 Hawk 250 - Full Mod list here. http://www.chinariders.net/showpost....62&postcount=1 2024 Royal Enfield Shotgun 650 https://chinariders.net/showthread.php?t=34124 Last edited by Megadan; 03-21-2022 at 05:20 AM.
	1

03-17-2022, 03:59 PM	#3
China Rider 27 Join Date: Dec 2018 Location: PNW Posts: 982	No doubt! That flange mount is a game changer!
	1

03-18-2022, 09:08 AM	#5
China Rider 27 Join Date: Dec 2018 Location: PNW Posts: 982	I put a PE 28 on my HAWK last fall. I could not believe the manifold issues. I must have bought 6 manifolds and none of them would work. This carburetor would have made it easy peasy. NIBBI got smart or maybe that was a production carb they offered up to all.
	2

03-18-2022, 09:55 AM	#6
Dusman Join Date: Jan 2018 Location: NC Posts: 206	Thanks Dan, Fitment issues with an intake manifold are what have kept me from using a Nibbi thus far. Now, problem solved!
	0

03-18-2022, 12:29 PM	#10
OffRoadToad Join Date: Jul 2021 Location: Florida Posts: 21	had a PE26FL in my cart for too long and missed it. Kinda bummed, I'm betting it will be a while before I see them in stock again. Really do not want to have to use a rubber flange with the regular PE26. Carb/intake space is kind of a premium on my smaller bike. Not to mention dicking with getting the manifold to fit right. Its a Z20 max with an actual airbox.
	0

03-18-2022, 06:59 PM	#11
XLsior Join Date: Aug 2020 Location: Australia Posts: 1,282	Seems the fist link is currently unavailable. Second link still has stock. tried to find them on Ebay/Alixpress...no show. Im tempted but they are $88 shipped to Australia...maybe I can justify signing up to prime again and save a bit on shipping. The side enrichment screw for me is the key selling point. Also the fact the PZ30B didn't fit with my XL frame making it a non B to work and I'm kinda over the raised choke cable makes this flange Nibbi very appealing. Kinda wish the red and black version was still in stock to match my bike. Very tempting. What are the thought regarding the PE28 and a CG300 cylinder... I have preemptively ordered a 'big bore' while still available on alixpress.
	0

03-18-2022, 08:08 PM	#13
XLsior Join Date: Aug 2020 Location: Australia Posts: 1,282	Seems Amazon.au still have the red/black version in stock... https://www.amazon.com.au/Motorcycle...=XUG0IMIV9ZNR& Just ordered mine..hopefully the in stock indication is legit. Whole lot of $140aud beans for a side screw enrichment and shiny knobs (performance improvements are noted)...but I still have the PZ30 as cg300 spare/backup if required.
	0