starting help

Pnrdrmmr · Jul 21st, 2009, 12:05 AM

I just purchased a Sportster today, it is a 1993 frame and suspension and a 2000 evo 1200 motor. The guy I bought it from said he was on the freeway when it started acting funny, and thought that the diaphragm in the carb had a hole in it. We replaced the carb with a good one and got new sparkplugs for it. It is getting spark and slightly turning over, it will run for a few seconds then die, but it will blow out black smoke when it starts. I live in Utah and the guys at the HD shop said the jets were to big, I don't remember the size tho, so could it be that its running to rich to start? I'm not very savvy with engine work at the moment, so I don't really know what is wrong with it. Any help would be greatly appreciated.

Hobbit · Jul 21st, 2009, 12:55 AM

it sounds like it is very rich and is fouling the plugs.
check the enrichner is not stuck in the on position and that it moves freely.
also remove the float bowl and have a look at the jet size the pilot jst should be a 45 if its stage 1 and a 42 if stock

Pnrdrmmr · Jul 21st, 2009, 01:02 AM

Okay sounds good. But what is the enricher? and where is it located.. I'm not to savvy right now. But I can figure it out when pointed in the right direction. Thank you very much tho.

NEWHD74FAN · Jul 21st, 2009, 01:08 AM

Here is a link to get you going on how to dissect the carb components and how they fit into the circuit at various throttle openings.

http://www.hdtalking.com/fuel_and_ca...rb_models.html

Here is Glider's rough carb circuit chart

Here is an exploded view of the stock HD Kehein CV Carb:

Hobbit · Jul 21st, 2009, 01:09 AM

enrichner/choke its usually on the opposite side to the carb and you pull it out to choke the air flow making the bike run rich so it starts easier when cold.
if this is stuck open the bike will run extremely bad as it is being starved of air and it will affect all the rpm ranges.
you will also need to check the jetting as if its had a large elevation change you may need to alter the jets to suit.
start simple.
run some fuel treatment thru it before stripping the carb.

Pnrdrmmr · Jul 21st, 2009, 12:33 PM

Ok, the enricher/choke seems fine, moves nicely. The jetting on the original carb is 170/45. Should I go smaller on those or are they fine? I would run some treatment thru, but we can't get it to start at the moment.

Jul 21st, 2009, 12:05 AM	#1
Pnrdrmmr New Family Ride: 1993 sportster Join Date: Jul 20th, 2009 Posts: 9	starting help I just purchased a Sportster today, it is a 1993 frame and suspension and a 2000 evo 1200 motor. The guy I bought it from said he was on the freeway when it started acting funny, and thought that the diaphragm in the carb had a hole in it. We replaced the carb with a good one and got new sparkplugs for it. It is getting spark and slightly turning over, it will run for a few seconds then die, but it will blow out black smoke when it starts. I live in Utah and the guys at the HD shop said the jets were to big, I don't remember the size tho, so could it be that its running to rich to start? I'm not very savvy with engine work at the moment, so I don't really know what is wrong with it. Any help would be greatly appreciated.

Jul 21st, 2009, 12:55 AM	#2
Hobbit Moderators Ride: 2009 FAST 103 Street Bob Join Date: May 18th, 2007 Location: The Shires UK Posts: 7,619 My Mood:	Re: starting help it sounds like it is very rich and is fouling the plugs. check the enrichner is not stuck in the on position and that it moves freely. also remove the float bowl and have a look at the jet size the pilot jst should be a 45 if its stage 1 and a 42 if stock __________________ Please stop by the "self help section" for maintenance tips, diagnostic codes and much more. >>Self Help Information and Tips<< click me!

Jul 21st, 2009, 01:02 AM	#3
Pnrdrmmr New Family Ride: 1993 sportster Join Date: Jul 20th, 2009 Posts: 9	Re: starting help Okay sounds good. But what is the enricher? and where is it located.. I'm not to savvy right now. But I can figure it out when pointed in the right direction. Thank you very much tho.

Jul 21st, 2009, 01:08 AM	#4
NEWHD74FAN Moderators Ride: 2004 Sportster XL1200RS Join Date: Aug 24th, 2008 Location: Camarillo, CA Posts: 3,712 My Mood:	Re: starting help Here is a link to get you going on how to dissect the carb components and how they fit into the circuit at various throttle openings. http://www.hdtalking.com/fuel_and_ca...rb_models.html Here is Glider's rough carb circuit chart Here is an exploded view of the stock HD Kehein CV Carb: __________________ Please stop by the "Self Help section" for maintenance tips, diagnostic codes and much more. >>Self Help Information and Tips<< Last edited by NEWHD74FAN; Jul 21st, 2009 at 01:15 AM.

Jul 21st, 2009, 01:09 AM	#5
Hobbit Moderators Ride: 2009 FAST 103 Street Bob Join Date: May 18th, 2007 Location: The Shires UK Posts: 7,619 My Mood:	Re: starting help enrichner/choke its usually on the opposite side to the carb and you pull it out to choke the air flow making the bike run rich so it starts easier when cold. if this is stuck open the bike will run extremely bad as it is being starved of air and it will affect all the rpm ranges. you will also need to check the jetting as if its had a large elevation change you may need to alter the jets to suit. start simple. run some fuel treatment thru it before stripping the carb. __________________ Please stop by the "self help section" for maintenance tips, diagnostic codes and much more. >>Self Help Information and Tips<< click me!

Jul 21st, 2009, 12:33 PM	#6
Pnrdrmmr New Family Ride: 1993 sportster Join Date: Jul 20th, 2009 Posts: 9	Re: starting help Ok, the enricher/choke seems fine, moves nicely. The jetting on the original carb is 170/45. Should I go smaller on those or are they fine? I would run some treatment thru, but we can't get it to start at the moment.

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starting help

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