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Nov 7th, 2008, 05:25 PM
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#1 | | Rookie 10+ posts
Join Date: Sep 2007 Location: east bethany,new york
Posts: 20 Model: 1991 harley 883(1200 kit)belt drive Occupation: grinder(welding shop)
| Crane ignition-noisy
does anyone know if a crane ignition .cam will cause excessive engine noise,bike runs great have no issues,but there is alot of engine slap mostly at idle.
1991 harley sportster 883
1200 kit installed
crane fireball adjustable ignition unit
belt drive | 
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Nov 8th, 2008, 07:31 AM
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#2 | | Moderator Has posted 500+
Join Date: Apr 2006 Location: Alvin TX
Posts: 3,217 Model: 03 E Glide X cop bike Interests: My family Old Dodge truck's Riding My Glide Occupation: Retired truck Driver
| No help but there's a lot of good sporty guys here art will see it & I'am sure he can help you out
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Alvin TX
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Nov 8th, 2008, 11:48 AM
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#3 | | Has posted 500+
Join Date: Mar 2008 Location: Nova Scotia,Canada
Posts: 670 Model: '90 FLSTC '03 FLHPI
| Quote:
Originally Posted by ironchoppermc  does anyone know if a crane ignition .cam will cause excessive engine noise,bike runs great have no issues,but there is alot of engine slap mostly at idle.
1991 harley sportster 883
1200 kit installed
crane fireball adjustable ignition unit
belt drive | Have you checked your primary chain adjustment?? | |
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Nov 9th, 2008, 05:58 AM
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#4 | | Rookie 10+ posts
Join Date: Sep 2007 Location: east bethany,new york
Posts: 20 Model: 1991 harley 883(1200 kit)belt drive Occupation: grinder(welding shop)
| just checked the primary,chain looks good,specs say 3/8 to 1/2 inch free play.I have exactly 1/2 inch in free play.
should i adjust it to 3/8 and see if that helps,or any other ideas.if its not the primary slapping,what else could it be.and do yo think its safe to ride like this,it sounds right when riding,the only time you really notice is at idle.
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Nov 9th, 2008, 06:34 AM
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#5 | | Has posted 500+
Join Date: Mar 2008 Location: Nova Scotia,Canada
Posts: 670 Model: '90 FLSTC '03 FLHPI
| No, if the chain is within spec it should be good. Can you tell where the "slap" is coming from?? Does it sound like piston slap?? Has it started making the noise since you did the 1200 kit?? | |
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Nov 9th, 2008, 06:42 AM
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#6 | | Rookie 10+ posts
Join Date: Sep 2007 Location: east bethany,new york
Posts: 20 Model: 1991 harley 883(1200 kit)belt drive Occupation: grinder(welding shop)
| I just got the bike last week,got a great deal on it,so dont mind doing work on it.it sounds like piston slap to me.it is only noticiable at idle when you give it gas it is slapping and knocking real loud,but as soon as you ride it goes away(as far as i can tell)
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mayhemriders.com
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Nov 9th, 2008, 07:28 AM
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#7 | | Has posted 500+
Join Date: Mar 2008 Location: Nova Scotia,Canada
Posts: 670 Model: '90 FLSTC '03 FLHPI
| Quote:
Originally Posted by ironchoppermc I just got the bike last week,got a great deal on it,so dont mind doing work on it.it sounds like piston slap to me.it is only noticiable at idle when you give it gas it is slapping and knocking real loud,but as soon as you ride it goes away(as far as i can tell) | I'm just taking a guess, but seems like the jugs are out of round. Here's a link to a top notch shop that may be close to you, at least worth a phone call or email. Hillside | |
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Nov 9th, 2008, 10:41 AM
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#8 | | Has posted 500+
Join Date: Apr 2006 Location: Charlotte, NC
Posts: 1,211 Interests: Anything outdoors (climbing, backpacking, fishing, Mtn biking, riding) Occupation: Chemistry teacher
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If you have a mechanics stethescope (screwdriver can work too) check for the location of the noise. If all you have is a long screwdriver. Place one end on the location of the bike where you think the noise is coming from and place your ear on the other. It can aid in locating the noise and better help you diagnose it. Later man...  | |
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Nov 9th, 2008, 04:55 PM
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#9 | | More than 100 posts!
Join Date: May 2006 Location: Newaygo,Mi.
Posts: 183 Interests: Bike riding Occupation: supervisor
| would be a good time to check things out....almost winter...sounds to me like too much clearance, pistons to jugs....Good Luck.... | |
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Nov 9th, 2008, 05:09 PM
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#10 | | Rookie 10+ posts
Join Date: Sep 2007 Location: east bethany,new york
Posts: 20 Model: 1991 harley 883(1200 kit)belt drive Occupation: grinder(welding shop)
| yea its snowing out now,so I guess its time to tear into it.thanks for all the help.
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Nov 9th, 2008, 05:29 PM
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#11 | | Moderator Has posted 500+
Join Date: Jul 2005
Posts: 7,426
| Quote:
Originally Posted by mwelych If you have a mechanics stethescope (screwdriver can work too) check for the location of the noise. If all you have is a long screwdriver. Place one end on the location of the bike where you think the noise is coming from and place your ear on the other. It can aid in locating the noise and better help you diagnose it. Later man... | one thing here......be sure to put the BIG end to your ear!!!! 
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Nov 9th, 2008, 05:37 PM
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#12 | | Rookie 10+ posts
Join Date: Sep 2007 Location: east bethany,new york
Posts: 20 Model: 1991 harley 883(1200 kit)belt drive Occupation: grinder(welding shop)
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mayhemriders.com
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Nov 10th, 2008, 10:57 AM
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#13 | | Has posted 500+
Join Date: Jun 2004
Posts: 3,107
| You can get an elcheapo stethoscope at an autoparts store, nice thing is you get the sound in both ears so when you work with the scope your brain isn't trying to process out sounds you're not interested in one ear while listening to the other.
Screwdriver works but the scope will really let you find the noise.
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