Mikuni VM26 Carb from Amazon

BBOWL10 · 11-30-2018, 12:51 PM

Hello,
I just received the VM26 carb that I bought from Amazon a few days ago. I checked out the main and the pilot jets to see what was in there. The main was a 100 and the pilot was a 40 or at least that was the number stamped on the jet. I thought the stock pilot was a 20 for these carbs. Can anyone who has purchased one of these let me know what stock jets were in their carb? I am going to change out the jets but I thought a 40 was really too big for a stock carb. Let me know!

41bigdawg · 11-30-2018, 06:04 PM

Mine came stock with a 20 pilot and a 100 main. A 40 on the pilot is huge, you could order a jet kit for it or send it back for another one.

BBOWL10 · 11-30-2018, 06:09 PM

Quote:

Originally Posted by 41bigdawg

Mine came stock with a 20 pilot and a 100 main. A 40 on the pilot is huge, you could order a jet kit for it or send it back for another one.

Someone must have grabbed the wrong pilot jet when putting it together. I am going to replace the jets anyway but I doubt I will have any use for a 40 in the future

BBOWL10 · 11-30-2018, 06:31 PM

See photo attached

ChipToothy · 11-30-2018, 07:19 PM

I have looked at probably 2 dozen carbs on Amazon this past week, don’t really know which one to get etc but I had noticed in the bottom page details some come with huge jets. Some of the pit bikes take a 40 or 50 it seems.

If the carb fits your bike correctly then just order the jet kit that covers your spectrum.

DualSport · 12-01-2018, 08:36 AM

These are fake VM26 carbs it's not surprising they mix up jet configurations. The good thing is that unlike the stock PZ30 it's easy to source pilot jets cause it's VM26 jet compatible where the PZ30 is just needle-jet compatible with the VM26 and still has a unidentified pilot jet.

This is an image of the real 30mm VM26.. Notice the branding on the throttle stem and they all had the plunger style choke.

BBOWL10 · 12-01-2018, 12:03 PM

Quote:

Originally Posted by DualSport

These are fake VM26 carbs it's not surprising they mix up jet configurations. The good thing is that unlike the stock PZ30 it's easy to source pilot jets cause it's VM26 jet compatible where the PZ30 is just needle-jet compatible with the VM26 and still has a unidentified pilot jet.

This is an image of the real 30mm VM26.. Notice the branding on the throttle stem and they all had the plunger style choke.

I thought the lever choke looked a little odd.

MrDeeds262 · 12-14-2018, 09:42 PM

I just received a Mikuni clone for the hawkster and it also came with a 40 pilot and it has a rebuild kit with it that has no markings on any of the jets supplied. I thought it may have been a wrong stamp so I tried it out.... Rich as can be on idle. So it’s definitely a #40. Oh, and this is my first post. Great stuff on this site keep it up gents.

Skibrat · 12-20-2018, 12:25 AM

I also ordered the Mikuni and it’s 40 pilot and 100 main. Will also need to buy some jets

Megadan · 12-20-2018, 03:19 AM

Jet numbers for your pleasure.

Pilot Jet = VM28/486
Link - https://jetsrus.com/a_jets_by_carbur...-486_pilot.htm

Main Jet= N100.604
Link - https://jetsrus.com/a_jets_by_carbur...arge_round.htm

I highly recommend OEM jets, but if you want to keep it on the cheaper side of things then spring for the OEM equivalent. Don't waste your money on cheap jet kits from Amazon.

Size wise a 25, 27.5, or 30 for the pilot jet depending on mods and elevation. The 30 only seems to work well for guys at sea level though. At 1100ft I found the 25 to work well on a stock bike, and the 27.5 to work well with mods though it was a tad rich on hotter days. Ideally I should have drilled out a 25 pilot to a size between the two.

Main jet - 105/107.5 on a stock bike. 110 for just intake or exhaust, 115 for intake and exhaust are good starting points. Adjust as needed for temp and/or altitude.

Needle clip 1 down from center (4th from top) worked well for me, but depending on factors you may find 2 down works the best (bottom notch).

41bigdawg · 12-20-2018, 03:16 PM

Awesome info Megadan! I am running the Mikuni on my Hawk too and had a slightly different experience. I have done the exhaust, airbox mod and K&N filter, still have the stock pilot which is a 20, main is 115. The bike was so rich at idle that I had to go UP one notch on the needle clip to get the idle leaned out enough so it wasn't fowling my plug. I need to change out the pilot so thanks for the link on those. Runs great right now, starts easy and idles smooth.

2LZ · 12-20-2018, 04:15 PM

I've done three VM26's from Amazon now and they all came with 100/20 setup.

dirtbkr188 · 12-20-2018, 04:45 PM

To elaborate a bit on what Megadan posted above, here are the jet differences between the VM22/26 clone carb and the Genuine VM26-606 carb

Cravin01 · 12-20-2018, 08:18 PM

The proof is in the pudding! Don't sweat the 40 jet, get some more cheap jets and go about your business.

My bike is now running a 115/40 combo up from a 110/33 and I didn't lower my elevation...get it? well I found that a fellow rider in my last Vlog got his pump carb in with a 112/39 setup and he hooked it up and it actually ran better than mine, I knew I was a little lean from checking my plug but the bike ran ok without getting too hot.

Now I'm trying to foul up my plug a little to find where too rich is, That's what I mean when I say get more jets and play around with it. I use to get a little pop or two letting off the throttle but I thought it was because I went to a open pipe, well now it's almost completely gone with the jet increase.

There are so many variables that it's just best to see what work's for you and keep a open mind to any suggestion. Less restriction can take more gas & air, Higher elevation=less gas and air. not to mention not all carbs are created equal.your air box might just suck worse than mine...ok maybe not.

Take it for what it is but I can kick start or electric start on half choke without a twist of the throttle from a COLD overnight start with a leaner 112/33 combo and and tad bit better running bike at 115/40.this may change as I see what happens and that's part of the fun here for me.

I swear by this pumper carb and the cold start pilot jets, The pumper should be the go to carb as opposed to the standard knock off mikuni replacement. I would like see how it compares to Jerry's power jet carb as I have no experience with it.

Megadan · 12-20-2018, 08:18 PM

Quote:

Originally Posted by 41bigdawg

Awesome info Megadan! I am running the Mikuni on my Hawk too and had a slightly different experience. I have done the exhaust, airbox mod and K&N filter, still have the stock pilot which is a 20, main is 115. The bike was so rich at idle that I had to go UP one notch on the needle clip to get the idle leaned out enough so it wasn't fowling my plug. I need to change out the pilot so thanks for the link on those. Runs great right now, starts easy and idles smooth.

Something seems off for it to be that rich at idle on a 20 pilot jet. Did you check and adjust the float level?

11-30-2018, 12:51 PM	#1
BBOWL10 Join Date: Nov 2018 Location: Gastonia, NC Posts: 102	Mikuni VM26 Carb from Amazon Hello, I just received the VM26 carb that I bought from Amazon a few days ago. I checked out the main and the pilot jets to see what was in there. The main was a 100 and the pilot was a 40 or at least that was the number stamped on the jet. I thought the stock pilot was a 20 for these carbs. Can anyone who has purchased one of these let me know what stock jets were in their carb? I am going to change out the jets but I thought a 40 was really too big for a stock carb. Let me know!
	0

12-14-2018, 09:42 PM	#8
MrDeeds262 Join Date: Nov 2018 Location: Saint Augustine Florida Posts: 8	#40 pilot I just received a Mikuni clone for the hawkster and it also came with a 40 pilot and it has a rebuild kit with it that has no markings on any of the jets supplied. I thought it may have been a wrong stamp so I tried it out.... Rich as can be on idle. So it’s definitely a #40. Oh, and this is my first post. Great stuff on this site keep it up gents.
	0

12-20-2018, 03:19 AM	#10
Megadan Join Date: Apr 2017 Location: Omaha, NE Posts: 7,991	Jet numbers for your pleasure. Pilot Jet = VM28/486 Link - https://jetsrus.com/a_jets_by_carbur...-486_pilot.htm Main Jet= N100.604 Link - https://jetsrus.com/a_jets_by_carbur...arge_round.htm I highly recommend OEM jets, but if you want to keep it on the cheaper side of things then spring for the OEM equivalent. Don't waste your money on cheap jet kits from Amazon. Size wise a 25, 27.5, or 30 for the pilot jet depending on mods and elevation. The 30 only seems to work well for guys at sea level though. At 1100ft I found the 25 to work well on a stock bike, and the 27.5 to work well with mods though it was a tad rich on hotter days. Ideally I should have drilled out a 25 pilot to a size between the two. Main jet - 105/107.5 on a stock bike. 110 for just intake or exhaust, 115 for intake and exhaust are good starting points. Adjust as needed for temp and/or altitude. Needle clip 1 down from center (4th from top) worked well for me, but depending on factors you may find 2 down works the best (bottom notch). __________________ 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

12-20-2018, 04:15 PM	#12
2LZ Join Date: Mar 2010 Location: Volcano, Ca Posts: 7,081	I've done three VM26's from Amazon now and they all came with 100/20 setup. __________________ "Light a fire for a man, and you heat him for a day. Light a man on fire, and you heat him for the rest of his life." 2007 Suzuki DRZ400S (SM convert) 2009 Q Link XP 200 1967 BSA B25 250cc Starfire 2022 Royal Enfield Interceptor 650 2023 Royal Enfield Scram 411 1948 Royal Enfield Model G 350
	0

12-20-2018, 08:18 PM	#14
Cravin01 Join Date: Jan 2018 Location: Forney Texas Posts: 498	The proof is in the pudding! Don't sweat the 40 jet, get some more cheap jets and go about your business. My bike is now running a 115/40 combo up from a 110/33 and I didn't lower my elevation...get it? well I found that a fellow rider in my last Vlog got his pump carb in with a 112/39 setup and he hooked it up and it actually ran better than mine, I knew I was a little lean from checking my plug but the bike ran ok without getting too hot. Now I'm trying to foul up my plug a little to find where too rich is, That's what I mean when I say get more jets and play around with it. I use to get a little pop or two letting off the throttle but I thought it was because I went to a open pipe, well now it's almost completely gone with the jet increase. There are so many variables that it's just best to see what work's for you and keep a open mind to any suggestion. Less restriction can take more gas & air, Higher elevation=less gas and air. not to mention not all carbs are created equal.your air box might just suck worse than mine...ok maybe not. Take it for what it is but I can kick start or electric start on half choke without a twist of the throttle from a COLD overnight start with a leaner 112/33 combo and and tad bit better running bike at 115/40.this may change as I see what happens and that's part of the fun here for me. I swear by this pumper carb and the cold start pilot jets, The pumper should be the go to carb as opposed to the standard knock off mikuni replacement. I would like see how it compares to Jerry's power jet carb as I have no experience with it. __________________ Visit me on YouTube at "Project Next"! https://www.youtube.com/channel/UC6KTCi2GVbfRDv-2XCqHhsg?view_as=subscriber 2017 Bashan Storm Keihen PZ30 Pumper Carb,115 main jet,35 pilot jet, gutted factory exhaust, Sambo Digital Speedometer,LED blinkers, H4 headlight,D.I.D X-ring chain 428,17/42 sprockets,UNI cone filter.
	2

11-30-2018, 06:04 PM	#2
41bigdawg Join Date: Sep 2018 Location: Tennessee Posts: 41	Mine came stock with a 20 pilot and a 100 main. A 40 on the pilot is huge, you could order a jet kit for it or send it back for another one.
	1

11-30-2018, 07:19 PM	#5
ChipToothy Join Date: Apr 2018 Posts: 819	I have looked at probably 2 dozen carbs on Amazon this past week, don’t really know which one to get etc but I had noticed in the bottom page details some come with huge jets. Some of the pit bikes take a 40 or 50 it seems. If the carb fits your bike correctly then just order the jet kit that covers your spectrum.
	1

12-20-2018, 12:25 AM	#9
Skibrat Join Date: Oct 2018 Posts: 28	I also ordered the Mikuni and it’s 40 pilot and 100 main. Will also need to buy some jets
	0

12-20-2018, 03:16 PM	#11
41bigdawg Join Date: Sep 2018 Location: Tennessee Posts: 41	Awesome info Megadan! I am running the Mikuni on my Hawk too and had a slightly different experience. I have done the exhaust, airbox mod and K&N filter, still have the stock pilot which is a 20, main is 115. The bike was so rich at idle that I had to go UP one notch on the needle clip to get the idle leaned out enough so it wasn't fowling my plug. I need to change out the pilot so thanks for the link on those. Runs great right now, starts easy and idles smooth.
	0

12-20-2018, 04:45 PM	#13
dirtbkr188 Join Date: Aug 2009 Posts: 503	To elaborate a bit on what Megadan posted above, here are the jet differences between the VM22/26 clone carb and the Genuine VM26-606 carb
	2