New Parts - Page 4

bi0phreak420 · 01-07-2011, 08:49 PM

Well I got new jets installed and it still does the same thing idles great..but when i go wide open it cuts out

bigheavy150 · 01-07-2011, 08:59 PM

is it getting enough fuel flow? if i gas it, my bike will run the carb out of fuel faster then it can flow in when choke is on.

float setting or needle and seat?

bi0phreak420 · 01-07-2011, 09:46 PM

Didnt think about that ill have to check that tomorrow but i did just add a filter to the fuel line cause it came with just straight line...the needle is set in the middle

Cal25 · 01-08-2011, 07:10 AM

What size was the old jet and what size is in there now? What changes have been made? (airbox delete, les restrictive exaust etc.)

When you say "when I go wide open it cuts out." Does it only do it at the top of the RPMs? If you crack the throtle back just a bit, does it smooth out and maybe increase speed? Or is it happening as soon as you give it some gas from idle?

different parts of the carb effect different throttle positions. For example the main jet only comes into play at about 3/4 throttle.

bi0phreak420 · 01-08-2011, 09:23 AM

It had a 100 main and 20 pilot i changed to 110 and 25 like someone on here said i should.I have put a performance cdi on with the new carb still have factory exhaust on it and yes it only cuts out when its wide open everything is fine til wide open

Cal25 · 01-08-2011, 01:40 PM

If it misfires at WOT and near max RPMs it could be a little too rich. Try going down one size and see if gets any better.

bi0phreak420 · 01-08-2011, 02:08 PM

it did the same thing with the smaller jets in it...It sounds like its hitting a rev limiter

TeamCheap · 01-08-2011, 02:24 PM

Put the other CDI back in if you havnt already and try it.

bi0phreak420 · 01-08-2011, 02:40 PM

Just tried that still the same...I have the needle set in the middle clip an the air/fuel mix screw about a half of a turn out

bi0phreak420 · 01-08-2011, 04:27 PM

MAN this thing has me stumped now if i take it down the road it will get up to top speed but it sputters while it gettin there

mizke · 01-08-2011, 05:36 PM

drop the needle clip down one notch, see if it makes the problem worse or better.. if its worse then raise the needle clip one notch up past center and see what it does.

bi0phreak420 · 01-08-2011, 06:27 PM

I am at the end of my rope with this carburetor I have done everything that everyone has suggested and still nothing has changed so i guess i put my factory back on atleast it will run right .....ANYONE WANNA BUY A MIKUNI CARB WITH 2 SETS OF JETS LET ME KNOW...........

mizke · 01-08-2011, 06:55 PM

it could be that where you live the elevation is different and you might need to go a few more jet sizes up then you think.. its trial and error that takes time to get dialed in..

bi0phreak420 · 01-08-2011, 07:43 PM

well i dont know how to match the jet size with the elevation im at ...Im use to when u buy something BRAND NEW that it just works ..there is none of this tedious fine tuning i have been trying to figure this out since before Christmas so you might understand why im at the end of my rope

bi0phreak420 · 01-08-2011, 07:53 PM

01-08-2011, 05:36 PM	#56
mizke Join Date: Aug 2010 Location: austin, tx Posts: 1,452	drop the needle clip down one notch, see if it makes the problem worse or better.. if its worse then raise the needle clip one notch up past center and see what it does. __________________ 200cc beast replica,carsoli cdi,performance coil,fmf powercore 2,uni air filter,hour/tach meter,jetted mikuni carb,msr bars,moose racing grips,yz250f clutch perch,D.I.D chain
	0

01-08-2011, 06:55 PM	#58
mizke Join Date: Aug 2010 Location: austin, tx Posts: 1,452	it could be that where you live the elevation is different and you might need to go a few more jet sizes up then you think.. its trial and error that takes time to get dialed in.. __________________ 200cc beast replica,carsoli cdi,performance coil,fmf powercore 2,uni air filter,hour/tach meter,jetted mikuni carb,msr bars,moose racing grips,yz250f clutch perch,D.I.D chain
	0

01-07-2011, 08:49 PM	#46
bi0phreak420 Join Date: Dec 2010 Location: Dayton,Ohio Posts: 160	Well I got new jets installed and it still does the same thing idles great..but when i go wide open it cuts out
	0

01-07-2011, 08:59 PM	#47
bigheavy150 Join Date: Jan 2011 Posts: 119	is it getting enough fuel flow? if i gas it, my bike will run the carb out of fuel faster then it can flow in when choke is on. float setting or needle and seat?
	0

01-07-2011, 09:46 PM	#48
bi0phreak420 Join Date: Dec 2010 Location: Dayton,Ohio Posts: 160	Didnt think about that ill have to check that tomorrow but i did just add a filter to the fuel line cause it came with just straight line...the needle is set in the middle
	0

01-08-2011, 07:10 AM	#49
Cal25 Join Date: Feb 2008 Location: Terrell and Grapevine Tx. Posts: 1,585	What size was the old jet and what size is in there now? What changes have been made? (airbox delete, les restrictive exaust etc.) When you say "when I go wide open it cuts out." Does it only do it at the top of the RPMs? If you crack the throtle back just a bit, does it smooth out and maybe increase speed? Or is it happening as soon as you give it some gas from idle? different parts of the carb effect different throttle positions. For example the main jet only comes into play at about 3/4 throttle.
	0

01-08-2011, 09:23 AM	#50
bi0phreak420 Join Date: Dec 2010 Location: Dayton,Ohio Posts: 160	It had a 100 main and 20 pilot i changed to 110 and 25 like someone on here said i should.I have put a performance cdi on with the new carb still have factory exhaust on it and yes it only cuts out when its wide open everything is fine til wide open
	0

01-08-2011, 01:40 PM	#51
Cal25 Join Date: Feb 2008 Location: Terrell and Grapevine Tx. Posts: 1,585	If it misfires at WOT and near max RPMs it could be a little too rich. Try going down one size and see if gets any better.
	0

01-08-2011, 02:08 PM	#52
bi0phreak420 Join Date: Dec 2010 Location: Dayton,Ohio Posts: 160	it did the same thing with the smaller jets in it...It sounds like its hitting a rev limiter
	0

01-08-2011, 02:24 PM	#53
TeamCheap Join Date: Jun 2006 Location: directly under the earths sun............NOW Posts: 2,302	Put the other CDI back in if you havnt already and try it.
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01-08-2011, 02:40 PM	#54
bi0phreak420 Join Date: Dec 2010 Location: Dayton,Ohio Posts: 160	Just tried that still the same...I have the needle set in the middle clip an the air/fuel mix screw about a half of a turn out
	0

01-08-2011, 04:27 PM	#55
bi0phreak420 Join Date: Dec 2010 Location: Dayton,Ohio Posts: 160	MAN this thing has me stumped now if i take it down the road it will get up to top speed but it sputters while it gettin there
	0

01-08-2011, 06:27 PM	#57
bi0phreak420 Join Date: Dec 2010 Location: Dayton,Ohio Posts: 160	I am at the end of my rope with this carburetor I have done everything that everyone has suggested and still nothing has changed so i guess i put my factory back on atleast it will run right .....ANYONE WANNA BUY A MIKUNI CARB WITH 2 SETS OF JETS LET ME KNOW...........
	0

01-08-2011, 07:43 PM	#59
bi0phreak420 Join Date: Dec 2010 Location: Dayton,Ohio Posts: 160	well i dont know how to match the jet size with the elevation im at ...Im use to when u buy something BRAND NEW that it just works ..there is none of this tedious fine tuning i have been trying to figure this out since before Christmas so you might understand why im at the end of my rope
	0

01-08-2011, 07:53 PM	#60
bi0phreak420 Join Date: Dec 2010 Location: Dayton,Ohio Posts: 160
	0