VM26 (clone) vs PZ30 help

[humanbeing]

The pic showed it won't works from day 1. It don't matches ANY pics from Jetsrus/ others that sold cheap copies
[Typical chinese]
PZ30 (aka Keihin clone)

Mikuni

[Megadan]

Funny, they work perfectly in my mikuni clone.

[Shaliza]

Originally Posted by hertz9753

I bought the same set of jets and had the same problem. I wrote something about not buying the buying the Wings jets if you will be using the Mikuni clone.

So which jets do you recommend if I want to upgrade the jet in my Mikuni clone?

Also I wonder why many people (Megadan and many other people who reviewed on the Wings jet on amazon) were able to install it in their Mikuni clone

[Megadan]

The funny thing is, just out of curiosity, I went and tried to screw one of the jets I got from Wingsmoto into my stock PZ30 and it gets tight after a couple of turns. Yet on my VM26 clone, they screw right in with no trouble. My 110 main is a Wingsmoto main jet.

I then dug into my Bag-O-Jets and fished out the 100 main that came in the VM26 and compared it to the rest of my Wings jets... same threads. My PZ30's 98 main jet on the other hand is every so slightly different.

So I can only assume that Wingsmoto is packaging and selling both types of jet as the same thing, or there was a mix up somewhere along the distribution chain. It wouldn't be surprising.

[Megadan]

Originally Posted by humanbeing

The pic showed it won't works from day 1. It don't matches ANY pics from Jetsrus/ others that sold cheap copies
[Typical chinese]
PZ30 (aka Keihin clone)

Mikuni

Technically, the Mikuni Jets you have listed are the wrong ones for the VM26 clone. At least the one I purchased. they have the same thread type, but the VM26 uses N100.604 jets, aka "large round" which are an 8mm width head, the ones you have pictured are N102.221 jets.

The Keihin jets, also known as #99101-393, are so close in thread diameter and pitch that they NEARLY work, which is why I honestly think somebody somewhere is either selling both as the "same thing" to cut costs, or there is some sort of mix up happening somewhere. I do know that the stock main jet in my Hawks factory carburetor has the head diameter of a Mikuni N100.604 (8mm). Which means it has the Mikuni jet head, and Keihin M5x.8 thread.

Having a .05 difference in thread pitch would explain why the threads get tight. For shits and giggles I went ahead and tightened the stock VM26 main jet all the way into the PZ30. I then backed it out. No thread damage...although I wouldn't recommend doing this, it will work.

[hertz9753]

Originally Posted by Shaliza

So which jets do you recommend if I want to upgrade the jet in my Mikuni clone?

Also I wonder why many people (Megadan and many other people who reviewed on the Wings jet on amazon) were able to install it in their Mikuni clone

I ordered Mikuni VM28 pilot and main jets. I will give the numbers later after a long shift of sleeping.

[Megadan]

Mikuni VM26 Clone.
Pilot Jet = VM28/486 http://www.jetsrus.com/a_jets_by_car...-486_pilot.htm
Main Jet = N100.604
http://www.jetsrus.com/a_jets_by_car...arge_round.htm

Obviously elevation and modifications make a difference in what sizes you need for each. A lot of people run between a 27.5 and 35 pilot jet

Main jet size can range anywhere from the 100 main jet that comes in the Minkuni if you are at high altitude on a stock bike. I am at 1000ft elevation with a 110 main on an otherwise unmodified bike. With exhaust and intake mods, 115 to 120 jets are the most common, and I think I have seen one or two examples running a 125.

For what its worth, while it may be more expensive, I would recommend getting the genuine Mikuni jets. The reason people opt for the Wingsmoto jets is that you get 10 jets for less than the cost of 2 genuine jets.

[Shaliza]

Thanks for the information. I just ordered 110 main (N100.604). I should receive it in a few days and report back.

[Megadan]

Originally Posted by Shaliza

Thanks for the information. I just ordered 110 main (N100.604). I should receive it in a few days and report back.

You will likely need to get a larger pilot jet as well. The mikuni clones come with a 20 pilot, which the bike will run on, but might be a bit too lean. If you can't manage to get a steady idle or you get some hesitation/stuttering while holding a light steady throttle at say 20-25mph with no more than 2 1/2 turns out on the mixture screw, then you will want to go up in pilot jet size. I have a 30 pilot jet and I get the slightest bit of hesitation at light throttle, so I have a 32.5 and 35 Pilot jet on order to try out.

[Hawk 229cc]

Originally Posted by Megadan

You will likely need to get a larger pilot jet as well. The mikuni clones come with a 20 pilot, which the bike will run on, but might be a bit too lean. If you can't manage to get a steady idle or you get some hesitation/stuttering while holding a light steady throttle at say 20-25mph with no more than 2 1/2 turns out on the mixture screw, then you will want to go up in pilot jet size. I have a 30 pilot jet and I get the slightest bit of hesitation at light throttle, so I have a 32.5 and 35 Pilot jet on order to try out.

Hi Dan ,i got my mikuni on order says japan of the side of it ,$38.00 i got the wings jet kit as well with 25 pilot i wonder how the 32.5 or 35 worked for you or if you stayed with the 30.i am at 1010 feet so seems the 110 ,will work should i get the 30 or higher thank you .just a note i seen pz30 carbs saying vm26 ,after reading the whole thread pz30 is the stock carb ?? so i was just a bit confused when i bought my carb ,ebay has sellers saying pz30 vm26 mikuni ,but stayed away from that one,think i am going to get the 30 32.5 an the 35 an have them

[Ariel Red Hunter]

Originally Posted by Megadan

Mikuni VM26 Clone.
Pilot Jet = VM28/486 http://www.jetsrus.com/a_jets_by_car...-486_pilot.htm
Main Jet = N100.604
http://www.jetsrus.com/a_jets_by_car...arge_round.htm

Obviously elevation and modifications make a difference in what sizes you need for each. A lot of people run between a 27.5 and 35 pilot jet

Main jet size can range anywhere from the 100 main jet that comes in the Minkuni if you are at high altitude on a stock bike. I am at 1000ft elevation with a 110 main on an otherwise unmodified bike. With exhaust and intake mods, 115 to 120 jets are the most common, and I think I have seen one or two examples running a 125.

For what its worth, while it may be more expensive, I would recommend getting the genuine Mikuni jets. The reason people opt for the Wingsmoto jets is that you get 10 jets for less than the cost of 2 genuine jets.

I would like to add to this, if I may. The reason Genuine Mikuni jets cost more is because they are flow tested before being released for sale. If this is one's first foray into carburetor tuning, having the knowledge that if you put a jet in the carb it will exactly be what it says it is I think is a big advantage. This whole carb tuning issue can be very confusing your first few trips around the barn...ARH

[Hawk 229cc]

i am just going to get like said the 25 30 32.5 & 35 an one of those should work ,try to find my info as needed on net or hear ,but when not sure still waiting to see what he had put in his at 1000 feet sound like the 30 an 110 or 115 should work for me,with aftermaket exhuast ,i think i am just going to get one ,but note they all turn black or rust at some point,though i avoid rain myself 20 miles a day is my plan on no rainy days ,till i get it upgraded ,i also have a friend who is good with carbs does help me too,but its time i know this carb much better then ever,mights well know the bike in an out ,over time the forum is big help too,just after the 4th going to do most of the important upgrades an learn as much about the bike as i can

[Megadan]

Originally Posted by Hawk 229cc

i am just going to get like said the 25 30 32.5 & 35 an one of those should work ,try to find my info as needed on net or hear ,but when not sure still waiting to see what he had put in his at 1000 feet sound like the 30 an 110 or 115 should work for me,with aftermaket exhuast ,i think i am just going to get one ,but note they all turn black or rust at some point,though i avoid rain myself 20 miles a day is my plan on no rainy days ,till i get it upgraded ,i also have a friend who is good with carbs does help me too,but its time i know this carb much better then ever,mights well know the bike in an out ,over time the forum is big help too,just after the 4th going to do most of the important upgrades an learn as much about the bike as i can

Personally, I would get the following sizes for a Hawk with a VM26.

Pilot. 25, 27.5, 30
Main:105, 107.5, 110, 112.5, 115, 117.5, 120

This range of jet sizes would cover and fine tune everything from completely stock on a hot day to cold temperatures on a bike with full bolt ons.

[Hawk 229cc]

the only one i did not get was the 27.5 at 1010 feet ,an you has said you were going to try a 32.5 an or 35,in the thread ,did you change your mind,at this point i would think the 30 would work pretty good going to go with aftermarket exhaust from crf230 ,an i am going with a real mikuni carb the only thing is the wings jets kit ,worst case i buy 27.5 but i got a better deal on shipping to buy 5 or more at a time ,? i got my eyes on an oring chain for Xt yamaha 250 t oring chain for $34.00 ,lately finding 128 link chain has been hard i am thinking about 130 an takeing few links out in the mxz no oring chain most of the middle end chains are like 5000 or more even the unibear for cheap is 4700 ,going with 16th an 45 rear ,but yes 128 links seem to be the most popular legnth ,thank you Dan

[Megadan]

Originally Posted by Hawk 229cc

the only one i did not get was the 27.5 at 1010 feet ,an you has said you were going to try a 32.5 an or 35,in the thread ,did you change your mind,at this point i would think the 30 would work pretty good going to go with aftermarket exhaust from crf230 ,an i am going with a real mikuni carb the only thing is the wings jets kit ,worst case i buy 27.5 but i got a better deal on shipping to buy 5 or more at a time ,? i got my eyes on an oring chain for Xt yamaha 250 t oring chain for $34.00 ,lately finding 128 link chain has been hard i am thinking about 130 an takeing few links out in the mxz no oring chain most of the middle end chains are like 5000 or more even the unibear for cheap is 4700 ,going with 16th an 45 rear ,but yes 128 links seem to be the most popular legnth ,thank you Dan

It would do you well to pay attention to the dates of the posts you are reading.

I was still experimenting with jetting. I found the 30 was actually too rich and causing said hesitation. I live at 1100ft and ended up with a 27.5 pilot and 115 -117.5 main depending on the air temp, with a 120 main when the temps got to the 40 degree range.