Black smoke???

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Black smoke???

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Black smoke??? - 8/28/2008 3:33:02 AM

CanadainBrute750

Posts: 33
Joined: 8/3/2008
From: Vancouver B.C
Status: offline

Getting light puffs of black smoke on mid/high power! pretty sure it's the air fuel mix being to rich! 140/148 jets 1.75 turns a/f screws!Should turn it in more perhaps 1.5 turns from seat!I always get messed up witch way to go.

_____________________________

Kawasaki Brute force 750i.
26x10x12 Rears 25x10x12 Fronts (GATORS)
Dyno jet kit,Moose module,K&N,
BIG-GUN head pipes & muffler.
LED Accent lights.

Post #: 1

RE: Black smoke??? - 8/28/2008 10:43:33 AM

outlawbro

Posts: 1167
Joined: 3/17/2008
From: Orlando,FL
Status: offline

so its about 3/4 up to full throttle it puffs out black smoke that would be your main jets. how does it run? and how do your plugs look?

_____________________________

05 BRUTE FORCE 750, 2" HL LIFT, HL SPRINGS, CENTER SNORKELS, DYNATEK, K&N, 8000K HID's

THE LOANER/HUNT BIKE
06 Honda Foreman 500
ALL STOCK

05 DODGE RAM 3500 5.9 CUMMINS
WITH SOME GOODIES ON IT : )
AND BLACKED OUT

I-6 CUMMINS GUYS ARE KEEPIN' IT STRAIGHT. THOSE OTHER BOYS SWING BOTH WAYS

http://www.myspace.com/argentineexc

(in reply to CanadainBrute750)

Post #: 2

RE: Black smoke??? - 8/28/2008 3:11:09 PM

CanadainBrute750

Posts: 33
Joined: 8/3/2008
From: Vancouver B.C
Status: offline

It's Not a lot of black smoke!But It's there!! Bike runs Good throttle response is good.But it does backfire when letting off full throttle!I assume this is unburnt gas?No I haven't checked the plugs although I should!What should I be looking for Black plugs??Thanks in advance OUTLAWBRO

_____________________________

Kawasaki Brute force 750i.
26x10x12 Rears 25x10x12 Fronts (GATORS)
Dyno jet kit,Moose module,K&N,
BIG-GUN head pipes & muffler.
LED Accent lights.

(in reply to outlawbro)

Post #: 3

RE: Black smoke??? - 8/28/2008 3:44:54 PM

outlawbro

Posts: 1167
Joined: 3/17/2008
From: Orlando,FL
Status: offline

you plugs should be a nice brown color.. and if it is runing fine your jets should be correct. also the popping you are hearing is from you aftermarket pipe

_____________________________

05 BRUTE FORCE 750, 2" HL LIFT, HL SPRINGS, CENTER SNORKELS, DYNATEK, K&N, 8000K HID's

THE LOANER/HUNT BIKE
06 Honda Foreman 500
ALL STOCK

05 DODGE RAM 3500 5.9 CUMMINS
WITH SOME GOODIES ON IT : )
AND BLACKED OUT

I-6 CUMMINS GUYS ARE KEEPIN' IT STRAIGHT. THOSE OTHER BOYS SWING BOTH WAYS

http://www.myspace.com/argentineexc

(in reply to CanadainBrute750)

Post #: 4

RE: Black smoke??? - 8/31/2008 11:45:27 AM

jcbones

Posts: 93
Joined: 11/22/2006
Status: offline

Letting off of throttle, and backfiring is a clear sign of needing the a/f screw adjusted. Idle is lean, throw fuel at it. As for the "good throttle" response even though you are puffing black smoke, if you dropped a jet size, you may notice a better throttle response.

Brute's love it "a little lean". Not too lean, just a tic. However, what you are describing is a rich condition.

For a/f mixture screw, let bike idle, then turn screw until bike is idling at it's highest smoothest point (but not past this point). Adjust idle rpm with the idle turn knob.

_____________________________

Yours truly,

Long Time Lurker!

(in reply to outlawbro)

Post #: 5

RE: Black smoke??? - 9/2/2008 2:16:29 PM

crazykid

Posts: 70
Joined: 8/6/2008
Status: offline

well if it is not that problem if u mud alot u could of gotten a little water in your seals check it out

(in reply to jcbones)

Post #: 6

RE: Black smoke??? - 9/2/2008 2:42:16 PM

devildog12210

Posts: 1694
Joined: 7/15/2007
From: Drummonds, TN
Status: offline

What seals would that be???

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"The 2nd amendment was never intended to allow private citizens to 'keep and bear arms.' If it had, there would have been wording such as 'the right of the People to keep and bear arms shall not be infringed.'" -Ken Konecki

(in reply to crazykid)

Post #: 7

RE: Black smoke??? - 9/4/2008 1:32:39 PM

crazykid

Posts: 70
Joined: 8/6/2008
Status: offline

piston seals

(in reply to devildog12210)

Post #: 8

RE: Black smoke??? - 9/4/2008 2:10:51 PM

EastCoastMudRacing

Posts: 184
Joined: 3/14/2008
Status: offline

haha canadian brute why are you yelling?

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www.eastcoastmudracing.com

ECMR Board Member

My Bike
06BF750
AMR 13:1 pistons, CWR 450 Cams, Big Gun, Dyna, VFJ Stage 3 Clutch, 29.5's on SS112's, Rad Relocate., Turners out back, Custom FloorBoards, TwinAir, HL Lift, HL Springs, Snorkled

ThunderWHAT?!?

(in reply to crazykid)

Post #: 9

RE: Black smoke??? - 9/6/2008 2:49:23 AM

CanadainBrute750

Posts: 33
Joined: 8/3/2008
From: Vancouver B.C
Status: offline

Thanks for the info.just curious How do you get at the A/R screw,with out taking the carbs off There must be an easier way! any tips?

_____________________________

Kawasaki Brute force 750i.
26x10x12 Rears 25x10x12 Fronts (GATORS)
Dyno jet kit,Moose module,K&N,
BIG-GUN head pipes & muffler.
LED Accent lights.

(in reply to EastCoastMudRacing)

Post #: 10