Jetting with remote air intake tubes

[bulldogfallon]

we run mostly MX and pull the tubes off before we start the units up.


What have guys found works best when using the remote intake tube on the small Mikuni/Sunworld and the larger 21mm OKO/Sunworld carbs.

Just trying to save some R&D time


Thank you

[jread14]

I am thinking we were running anywhere from a 115 to a 125 here in Texas last year. JR

[bulldogfallon]

Richer with the snorkle?

[forgiven]

On the 24's I am using 110 to 115's

Reletively the same with or without.

[humboldt hills]

In Ohio
40 pilot
125-130 main
clip in the middle

that is on both mukini and sunworld

[jread14]

Originally posted by bulldogfallon
Richer with the snorkle?

Some of our bikes liked the bigger jet last year. I was running a 125 and then it became a pig at the end of the year. I dropped down to a 110 and it started screaming again, but everyone else stayed around 115-125. Keep in mind that this was on the Mikuni carb. We are running 110's in the OKO and Sunworlds without the snorkle this year.

[dblacks]

we always ran something between a 105 to a 115

[hotquads1]

interesting info , to hear jetting from other areas, but would be more helpful if you mention tempature and fuel being used , so others will be able to make a good choice. My snorkle was hooked to my OKO when I dropped it into the ocean , I think the jetting was 40 pilot and 120 main and it sank very quickly , fastest I ever saw it go ! Temp that was about 85.
marc

[forgiven]

Some unsubstantiated thoughts on the subject is not to mess with the pilot so much. If I am going to go one way or another is leaner not fatter. Usually as I am raising the main I am going out on the air screw a little and dropping the needle a clip and seems to work most consistently. Not true for ALL but certainly most.

My OKO's seem to run 5 on the jet size smaller, ie. 110-115 on sunworld and I have never been able to get above a 110 on any of the OKO's but have run some as low as 100 with decent success but if I am apples to apples it is about 5 on the number lower wheter you call that 2 or 1 size...you all can argue about that.

I use the same 4200 uni on all of them so I would think being much lower elevation wise would make a much bigger difference than the few/10 degrees difference in temp to you AL and FL guys. I can't imagine jumping up to a 120 on an OKO due to the elevation but I have been wrong many times (many times even today) plus all you guys been doing this much longer than me. Just sharing what I have seen so far.

That being said I believe with all my heart one of the best bolt on mods anyone can do to their mini is to get very familar with jetting, take great notes, stop jumping all over the place, go slow and mythodical on all adjustments and listen intently.

Biggest problem with that...time.

[jread14]

Originally posted by hotquads1
interesting info , to hear jetting from other areas, but would be more helpful if you mention tempature and fuel being used , so others will be able to make a good choice. My snorkle was hooked to my OKO when I dropped it into the ocean , I think the jetting was 40 pilot and 120 main and it sank very quickly , fastest I ever saw it go ! Temp that was about 85.
marc

Good point. We are in Texas and all of these number are based on 50-70 degrees (120-125 main), 90-100 degree temps and miserable humidity (110-115 main) and all on a stock Mikuni carb... I was running super unleaded last year with a pre mix 44/1. I also used a small K&N pod filter at the top of the snorkle as well.

This

[humboldt hills]

Jetting is the best lesson you can learn on these 2 strokes!

Simple fact is, when adding the snorkle, if you don't drop to a 40 pilot it won't hardly run at all.
When I jetted a 90 with the 24 oko, we went from a 120 main to a 118 main, left the needle alone and replaced the pilot from 42 to 40. It is so wierd how you all use so much smaller mains. We run just about all the gnccs and never have to rejet. Although they say we will at the snowshoe because the elevation change.

[marsrace2]

speaking of the remote tube I was thinking of replacing the air box on an apex pro shark 90 with the DRR remote tube, any thoughts? I dont want to run the pod filter right on the carb like we do on the race quad because this is a trail machine. Any thoughts?

[humboldt hills]

I have seen the new apexes at the GNCCs with the intake spun around and the filter is under the seat. Don't know much about them though.

[forgiven]

Hey Humboldt

What elevation are you at? If you don't know let me know what town and I will try to look it up. It is interesting that you are running a bigger main since it would seem we should be pretty identical.

[humboldt hills]

we are anywhere from 900-1200 ft everywhere we ride around here. We have about 8 kids we ride with on DRRs all with the same jetting as us.

[forgiven]

Had no idea you guys were so much higher there. We are around 517-580ish depending.