Discovery during jetting * attention*

First; let me thank all who have responded and called me on the previous posts regarding jetting.
Scribner, Roundman, Chevyon52, Flamudder, and all the others,  your advice and setups have been very helpful.
 
Now what I/We discovered:
we re-jetted with Dyno-Jet kit, two Brute 750's both with Bayou Snorkels, K&N filters and Moose Modules.
Jetted as follows:
150f/155r
clip pos #4 both f/r
2 turns on mix screw
 
What we got was still rich.
During a static run up we noticed that the needle was not being pulled back out of the neddle jet and giving a rough and rich run.  Removed & inspected needle for burrs and correct position of e-clip and washers.
 
It was during this inspection we noted that the "aux slide lift hole" that was drilled as per Dyno-Jets instructions was partically blocked by the legs of the plastic spring seat.
In the Kawi Service Manual there is a note to be SURE that the spring seat is clocked so that the vacuum slide hole is not blocked.  Same note SHOULD apply to the aux hole that needs to be drilled for the Dyno-jet.
At this point the only solution was to clip off the plastic leg blocking the aux hole.  Once that was done....BINGO
The rich running and tuning issues went away!
 
It's my opinion that some of us are chasing a ghost moving e-clip positions and making other adjustments when running too rich after the re-jet install.  It maybe in fact, as was my case, that the aux hole you drilled is either partially or completely blocked, not allowing enough vaccum to pull back on the diaphram and in turn pulling the pin out of the seat.
 
Again my opinion;  Dyno-Jets instruction should note that the location of the aux hole is critical to proper opertation.  Instead there instructions show a picture of where the hole should be, but no deminisions or any point of reference.
 
If any Dyno-Jet people visit this sight, I would appreciate a response or at least a note on future kit instructions.
 
I hope this will benefit all of us who have spent countless hours tuning something,that could have been prevented by a simple footnote in the Dyno instructions.
 
Any and all responses are welcome.

2006 Silver Brute Force 750i
29.5 Law's on Rattlesnake's,, HL Full Diamond plate skids & Bumpers, HL Springs, Warn 2.5, Copperhead VDI, Bayou Snorkel, K&N, Dyno Jets 150f/155r, HMF utility, Extreme Clutch W/ Kevlar Belt
Mods on a daily basis.
With liberty, comes Justice for all!

Great info!

Team Bucked Up #77
Powered by J&J Performance, Ridge Outldoors, Champions of Mt. Dora, Answer Racing 

Proud supporter of #27 Team Bucked Up Racing

2008 Can Am Max with some Gorilla Goodies!!

2006 Brute 750 - Lime Green with a little FCP!!!

HERS 2005 BLUE Brute 750 - Fundy Power Sports motor,

Great info.

Team GORILLA Red
Toby Betsill #77
Flynt's custom performance,Mud Industries


08 FCP 840 Teryx 

2010 wins
1st place RUV FL motoplex
1st place RUV Creekbottom ATV (SMRS)
 

thanks for lettin us know. only if i would have knew before i jetted mine it would have been alot easier.

08 brute 650
28 swamplites on rattlesnakes
highliter springs
2in lift
dynatek cdi
almond secondary

I think this might be the problem that is making my brute run like poo!  running rich, sounds like its missing at idle,  I'm having a friend snorkel my brute this week so I'll give it a look and see if its the problem, thanks for the info
 

'07 Brute Force 750

(4) 30x10x12 MudLite xxl
(4) ITP Type 7 Black Wheels
2" HighLifter Lift
HighLifter Springs
HighLifter Temp Guage
Moose Power Pack
Dyno Jet Kit
HMF Penland Exhaust
Pen-Lock
Warn 2.5 Winch
k&n filter/ pre filter
Full Snorkel

coming soon:

29.5 outlaws

what elevation do you ride

First; let me thank all who have responded and called me on the previous posts regarding jetting.
Scribner, Roundman, Chevyon52, Flamudder, and all the others,  your advice and setups have been very helpful.

Now what I/We discovered:
we re-jetted with Dyno-Jet kit, two Brute 750's both with Bayou Snorkels, K&N filters and Moose Modules.
Jetted as follows:
150f/155r
clip pos #4 both f/r
2 turns on mix screw

What we got was still rich.
During a static run up we noticed that the needle was not being pulled back out of the neddle jet and giving a rough and rich run.  Removed & inspected needle for burrs and correct position of e-clip and washers.

It was during this inspection we noted that the "aux slide lift hole" that was drilled as per Dyno-Jets instructions was partically blocked by the legs of the plastic spring seat.
In the Kawi Service Manual there is a note to be SURE that the spring seat is clocked so that the vacuum slide hole is not blocked.  Same note SHOULD apply to the aux hole that needs to be drilled for the Dyno-jet.
At this point the only solution was to clip off the plastic leg blocking the aux hole.  Once that was done....BINGO
The rich running and tuning issues went away!

It's my opinion that some of us are chasing a ghost moving e-clip positions and making other adjustments when running too rich after the re-jet install.  It maybe in fact, as was my case, that the aux hole you drilled is either partially or completely blocked, not allowing enough vaccum to pull back on the diaphram and in turn pulling the pin out of the seat.

Again my opinion;  Dyno-Jets instruction should note that the location of the aux hole is critical to proper opertation.  Instead there instructions show a picture of where the hole should be, but no deminisions or any point of reference.

If any Dyno-Jet people visit this sight, I would appreciate a response or at least a note on future kit instructions.

I hope this will benefit all of us who have spent countless hours tuning something,that could have been prevented by a simple footnote in the Dyno instructions.

Any and all responses are welcome.

 
 
 
So is this causing the mid rang miss as well?? Why they spudder out when holding at a steady speed?? So i guess it doesn't hurt to cut the little leg off?? Thanks-Chris

2005 Red Brute force 750 (SOLD)

27x12x12 vampires f/r
DNA wheels.
Bayou Snorkels,
DynoJet Jet kit,
K&N Filter,
HMF Penland.
KEBC Mod,
EPI Clutch kit,
CopperHead VDI!!

08 Polaris Sportsman 800,
Shiny Red, Bone Stock, and staying that way!!

1998 Dodge 2500 12V ****-mins,
40in Hawgs,
Some motor stuff

http://www.cardomain.com/ride/2147074/1

great job [;)]

05 650 sra  team green 29.5 laws 700 crank 10.5 wiseco dyna penland exhaust lift springs lift kit bumper cover  built by kyles backyard performance
05 king 700 2"lift 28 laws snorkled uni air filter itp wheels wifes bike
98 chevy 2.5 ton on 44 boggers 26" of lift 4 10"subs for b
http://community.webshots.com/user/chevyon52/stats?vhost=community&vhost=community

Thanks alot!   When they release the 650i kit and i put mine in it'll help alot

2007 Rhino 660 Sport Edition
2006 BF 650i
2001 400 BigBear 4wd

http://pg.photos.yahoo.com/ph/brute650i/my_photos

http://www.putfile.com/brute650i

Not sure exact altitude but im in north western Louisiana

'07 Brute Force 750

(4) 30x10x12 MudLite xxl
(4) ITP Type 7 Black Wheels
2" HighLifter Lift
HighLifter Springs
HighLifter Temp Guage
Moose Power Pack
Dyno Jet Kit
HMF Penland Exhaust
Pen-Lock
Warn 2.5 Winch
k&n filter/ pre filter
Full Snorkel

coming soon:

29.5 outlaws

Hey guys, the altitude you run wont matter regardinmg the hole block.
 
But if you are asking about my set up, I run at sea Level in Daytona Beach, Florida!

2006 Silver Brute Force 750i
29.5 Law's on Rattlesnake's,, HL Full Diamond plate skids & Bumpers, HL Springs, Warn 2.5, Copperhead VDI, Bayou Snorkel, K&N, Dyno Jets 150f/155r, HMF utility, Extreme Clutch W/ Kevlar Belt
Mods on a daily basis.
With liberty, comes Justice for all!

Could you take a picture of this hole. My jet kit should be there monday or tuesday and im not sure what you guys are talking about. Thanks

-2006 brute force 650i:HMF, K&N, dynojet kit, 27 10s and 12s vampires
-2005 Foreman S 4x4
-2000 bayou 220: 23in dirt devils
-1984 bayou 185 -
http://pg.photos.yahoo.com/ph/usmc_sniper@sbcglobal.net/my_photos
-When ya dont know where da start, go back to da beginin....

...The jet kit requires you to drill a hole in the vaccum diaghram body of the needle holder (the kit comes with the drill bit)theres a small plastic frame inside the diaghram body that holds the needle that has four legs you need to clip one of these legs off so that it will not accidently cover the drilled hole...The kit come with pretty detailed instrutions so youll know what to do...

08 brute 650
28 swamplites on rattlesnakes
highliter springs
2in lift
dynatek cdi
almond secondary

Don't clip the whole leg off just the feet at the side. If you shorten the legs it could cause more problems.

BF750 BUILT FOR BUSINESS
Stock is for pansies
 
 

OK my dj kit came today and remember this is for a 650i, anyways NO WHERE in the instructions does it say anything about drilling a hole through the diaghram(sp). The only thing you drill is the little metal part that is covering the a/f screw. So im guessing I shouldnt have to worry about any of this and once again this is the kit for the 650i from dynojet, not for the 650sra. So please tell me if I need to go about doing anything else. thanks

-2006 brute force 650i:HMF, K&N, dynojet kit, 27 10s and 12s vampires
-2005 Foreman S 4x4
-2000 bayou 220: 23in dirt devils
-1984 bayou 185 -
http://pg.photos.yahoo.com/ph/usmc_sniper@sbcglobal.net/my_photos
-When ya dont know where da start, go back to da beginin....

Did it come with a drill bit and a shorter diaphram spring?

BF750 BUILT FOR BUSINESS
Stock is for pansies
 
 

hes correct the 650 has no hole to drill just a new neddle and spacers
 
 

2006 Silver Brute Force 750i
29.5 Law's on Rattlesnake's,, HL Full Diamond plate skids & Bumpers, HL Springs, Warn 2.5, Copperhead VDI, Bayou Snorkel, K&N, Dyno Jets 150f/155r, HMF utility, Extreme Clutch W/ Kevlar Belt
Mods on a daily basis.
With liberty, comes Justice for all!

Ok well I did realize that I dont need to drill a hole so thats good. Im pretty pleased with how easy the kit install went, and hopefully I can figure out the jetting with out to much trouble.

-2006 brute force 650i:HMF, K&N, dynojet kit, 27 10s and 12s vampires
-2005 Foreman S 4x4
-2000 bayou 220: 23in dirt devils
-1984 bayou 185 -
http://pg.photos.yahoo.com/ph/usmc_sniper@sbcglobal.net/my_photos
-When ya dont know where da start, go back to da beginin....

ORIGINAL: SSTOGI

Don't clip the whole leg off just the feet at the side. If you shorten the legs it could cause more problems.

Let me correect myself.  You just have to the foot off of one leg. Don't cut the feet off of all of them. The spring needs to sit on them .


Also don't drop it on the floor and let the dog get it.    It'll be  screwed for sure.[:D]

BF750 BUILT FOR BUSINESS
Stock is for pansies
 
 

OK guys/girls I can make this a sticky but there are already quit a few in here.Something will need to be removed to make it a sticky.Let me know what yall want to do

My Pics

IMO the stickys are not for advertiseing products. Loose the HL rad. sticky . Also the drag clutch sticky has some good info but I don't think most of us don't go that deep into our clutch settups for the rideing we do so that one can go also.  Most of us know the URL rules and it has nothing to do with helping people and share what we've learned about our bikes. That is what 99% of our post are about...... shareing info.

BF750 BUILT FOR BUSINESS
Stock is for pansies
 
 

I agree with SSTOGI !! 

2005 FOREMAN 500 4X4 (SOLD)
2007 BRUTE FORCE 750 BLACK
29.5" LAWS ON ITP SS112
DYNO JET, K&N
HMF QRS FULL SYSTEM
HL BELT
2" SS ATV LIFT
CUSTOM SNORK
HL MODULE
HL OUTLAW CLUTCH KIT

I can attach the link for the drag clutch info to the "how to tighten belt" one in a single post.[;)]

2005 Camo BF 750, SSATV 2" lift, JE Pistons, HL Rack Radiator, 29.5's on ITP 5's, BS, 2" Exhaust Snorkel, Dyna CDI, HL Module, HL Extreme Clutch, HL Diamond Bumper and Bash. BFWDP
2007 EE Rhino660 28" Outlaws on Castlerocks, Stereo system, EBC Brakes.
http://community.webshots.com/user/mudcrazee
http://www.southernswampboyz.com

ORIGINAL: mudcrazee

I can attach the link for the drag clutch info to the "how to tighten belt" one in a single post.[;)]

Done.[:D]

2005 Camo BF 750, SSATV 2" lift, JE Pistons, HL Rack Radiator, 29.5's on ITP 5's, BS, 2" Exhaust Snorkel, Dyna CDI, HL Module, HL Extreme Clutch, HL Diamond Bumper and Bash. BFWDP
2007 EE Rhino660 28" Outlaws on Castlerocks, Stereo system, EBC Brakes.
http://community.webshots.com/user/mudcrazee
http://www.southernswampboyz.com

Imo the belt reset , clutch , and tighten belt should be combined .

BF750 BUILT FOR BUSINESS
Stock is for pansies
 
 

ORIGINAL: SSTOGI

IMO the stickys are not for advertiseing products. Loose the HL rad. sticky . Also the drag clutch sticky has some good info but I don't think most of us don't go that deep into our clutch settups for the rideing we do so that one can go also.  Most of us know the URL rules and it has nothing to do with helping people and share what we've learned about our bikes. That is what 99% of our post are about...... shareing info.

 
The HL rad and the URL threads were put up by Hl empoyees.Since Mary done that I will unsticky that one and put the one about jetting in its place

My Pics

thanks for making this sticky!this will save alot of headaches for people in the future

If I run just a LRD Torc slip on (07-750) will I need to rejet? I'm pretty sure later when I snorkal I'll def. need to. But right now w/ just the LRD will I need to? I dont have a clue about jetting.

"Play Hard, Pay Hard!"

"Brute Force: On it, or Behind it"

jet it now and get it over with

2005 orange bf750 27" maxxis bighorn,itp c series wheels,dynojet, vdi copperhead, warn 3.0, powermadd hand gaurds,full skid plates, k/n filter

yeah I guess I'ma put the exhaust on (ordered it last night) and get the stuff to snorkal, and then take it to flynt b/c I dont know junk about carberators.

"Play Hard, Pay Hard!"

"Brute Force: On it, or Behind it"

Me personally I would snorkle it and pipe it and jet once just in case it changes after you add the snorks.  JMO
 
Also I thought we were pushing to get this thread put in the help section thread?

2007 Rhino 450 Trailer Queen

there's a link to this thread in the stickie up top isnt it, I think thats where i found it. I think I'm put the pipe on, snorkal it, and take it to flynt or someone around here.

"Play Hard, Pay Hard!"

"Brute Force: On it, or Behind it"

Sounds good. And youre right its linked in there my bad....[&o]

2007 Rhino 450 Trailer Queen

I've jetted mine and cut the leg off and it runs great. But if the leg blocked the hole what would be the difference of the leg blocking it or never drilling a hole to start with? A stock bike runs fine with no hole it doesn't flood. The hole doesn't control gas, it controls vacuum . The extra hole is to help the slide open faster . So if you blocked the hole it would be like you never  drilled one. I cut the leg off so the vacuum could help open the slide .If you don't  cut the leg off there's no reason to drill the hole.[&o] IMO

'07 Brute Force Full Muzzy Exhaust, clutch mod with red primary spring & dynatek cdi., Wiseco pistons, head work, cam shafts. 71 rwhp.on 25 inch tires. Nitrous Express kit
BFR Performance
www.myspace.com/bruteforcerandy

If you look down into the slide you will see 5 little patitions comeing off the sides of the perch that the neddle sitts on. The legs of the spring seat go between these patitions and holds it form spining. If you drill the hole inline with one of these patitons the feet won't cover it up . 

BF750 BUILT FOR BUSINESS
Stock is for pansies
 
 

you know i drilled mine in accordance to the dyno jet instructions and they were real scarce with the details, so now if this is what can cuase the low idle miss then i shall have to take my brute apart and check the feet to see if they are truley the culprate, but why would it start 6 months after the fact you know? anyone.....[:(]

http://s150.photobucket.com/albums/s110/ddtnewyork/
05 KVF750,Big Gun EVO, D.J. 150f/155r, ITP> type 7/28" XL's,Type 5/29.5-12 laws 55.5" wide, K&N/Outerwears, Dyna CDI,EPI> Pink 1st, Almond 2nd, 58g, A.P.I> skids, Masterpull/warn 2500lb, Am-star>X series-Tie rods/ends, DDT Snorkels


Team
MILL CREEK MAFIA
Racing

does anybody got pics of this fix

PROUD MEMBER OF
THE MAD CLOWN BOYS
07' BLUE 750 BF
26" ZILLAS
ITP TYPE 6 RIMS
MUZZY EXHAUST
K & N AIR FILTER
MOOSE MODULE
MIMB SNORKELS
Quad Gear Evolution Rear Rack Bag
WARN XT25 WINCH
KIMPEX FRONT BUMPER
http://www.myspace.com/madclownboys
http://www.youtube.com/profile?user=ss340duster

first i think i may have discovered what may well be the problem.  I have a 2005 Brute Force 750 that has Bayou Snorkels, full HMF penland exhaust, twin air power flow kit, and dynatec.  my problem is that i couldn't get it jetted right i had the dynojet jet kit installed and had done all the fixes from all forums buzz connector etc etc etc.  acted like it was running rich then running lean just never would settle down.  I ended up saying to **** with it and took my four wheeler to have it dynoed at xtreme racing here in Mississippi and let me tell you that my Brute has never ran better and this is what you should do.  however i will tell you that my brute is an odd ball in that the rear cylinder instead of taking a larger jet size than the front takes a smaller one than the front.  I highly recommed getting your bike dynoed to see if this is your problem the people at xtreme racing were really helpful and explained that they have seen this happen on a handful of Brutes that they have dynoed and simply said that best they can figure is that these cylinders and parts are cast and may have some simple flaws in the casting or something but who knows and i don't care it is running like never before and i couldn't be happier.

For thsoe that haven't drilled the hole in the slide yet... drill it to where the hole isn't directly on the leg that way you don't have to go cutting one of the legs.

Brute Force 840 V-Twin
Teryx 820 V-Twin

i clipped my legs tonight.

PROUD MEMBER OF
THE MAD CLOWN BOYS
07' BLUE 750 BF
26" ZILLAS
ITP TYPE 6 RIMS
MUZZY EXHAUST
K & N AIR FILTER
MOOSE MODULE
MIMB SNORKELS
Quad Gear Evolution Rear Rack Bag
WARN XT25 WINCH
KIMPEX FRONT BUMPER
http://www.myspace.com/madclownboys
http://www.youtube.com/profile?user=ss340duster

Glad to see this thread is still helping out.
 
I agreee if you know about how critical the hole and leg alighnment are, you could drill in the right location and not have to cut the leg off.  Unfortunately, the Dyo instructions dont indicate that.

2006 Silver Brute Force 750i
29.5 Law's on Rattlesnake's,, HL Full Diamond plate skids & Bumpers, HL Springs, Warn 2.5, Copperhead VDI, Bayou Snorkel, K&N, Dyno Jets 150f/155r, HMF utility, Extreme Clutch W/ Kevlar Belt
Mods on a daily basis.
With liberty, comes Justice for all!

I just installed my kit, but being real tired, and not reading the full thread, I cut the entire leg right off.... [&:] I'll keep you guys posted to let you know if it causes any issues.....

Covering the slide lift hole accidently has been discussed more than a few times on here before.Is there something else in this one that I missed cause I thought this was old news?

06 Silver Brute Force 750
Penland/Dynatek/fully snork'd
2" SSATV lift
27" Swamplites on SS112's

SORRY!  It is old news for some of you.  I'm new here, and can't say i have the time to spend a bunch of time on here.

ORIGINAL: enigma

first i think i may have discovered what may well be the problem.  I have a 2005 Brute Force 750 that has Bayou Snorkels, full HMF penland exhaust, twin air power flow kit, and dynatec.  my problem is that i couldn't get it jetted right i had the dynojet jet kit installed and had done all the fixes from all forums buzz connector etc etc etc.  acted like it was running rich then running lean just never would settle down.  I ended up saying to **** with it and took my four wheeler to have it dynoed at xtreme racing here in Mississippi and let me tell you that my Brute has never ran better and this is what you should do.  however i will tell you that my brute is an odd ball in that the rear cylinder instead of taking a larger jet size than the front takes a smaller one than the front.  I highly recommed getting your bike dynoed to see if this is your problem the people at xtreme racing were really helpful and explained that they have seen this happen on a handful of Brutes that they have dynoed and simply said that best they can figure is that these cylinders and parts are cast and may have some simple flaws in the casting or something but who knows and i don't care it is running like never before and i couldn't be happier.

 
When I first got my BF i had to take the carbs apart to clean them and not knowing anything about these machines i put the smaller jet in the rear and the bigger one in the front and it ran awesome. It was stock then however now i have the Dyno-jet kit in it.

2005 Brute Force Camo 750i
Hot Cams stage 1
27" ITP XTR's
Moose power chip
Dyno Jet kit
HL Pen-Lock
Custom snorkels
Custom HID's

alright i need help!! ive rejetted my brute just like the dirrections said " 150f 155r on the jets and #4 on the clip and two turns off of the bottom i also cut part of the leg off so it can get good suction but something is not right.. it idles fine but when i ride it it doesnt have any power in the bottom end or the top end. does anyone have any suggestions?

when we are talking about the suction on the slides how far should they move??? and how many people are using the 150f 155r set up onthe mud in my blood snorkles and have the 2 inch rubber 90 coupler? and if not are you using the 3inch rubber 90 coupler?!?

Thats good Info. I had to figure that out the hard way.