correct point gap on 81
Thread Starter
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Seasoned HDF Member
Joined: Mar 2008
Posts: 5,134
Likes: 146
From: texas
correct point gap on 81
i thought i read on here it was suppose to be .018.it was set at .032.i set it at .018 and its a no go.----the timing is set right. still wont run on 018 so i just set it back at .032.----so what is the correct gap?thanks in advance.
Stellar HDF Member
Joined: Feb 2006
Posts: 3,035
Likes: 17
From: Houston Texas
I thought a 1981 would be the same, but I cannot say for certain.
Someone help us out here...........pg
Road Master
Joined: Jun 2008
Posts: 1,078
Likes: 39
From: NW Florida
Stock 1981 would have an electronic ignition. 1971 to 78 would be points and the .018 would be correct. If the the 81 was converted to points with the stock 71 to 78 parts the point gap would be the same. Double check to make sure you have the correct ignition parts. The circuit breaker cam for the early electronic ignition is not compatable with points. Check the service manual for your year to make sure that you are setting the timing on the correct mark on the flywheel. I believe in 1981 they changed the markings on the flywheel and the straight line is no longer the advance mark but now represents TDC.
Last edited by FilthyLucre; Nov 2, 2008 at 12:14 AM.
Thread Starter
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Seasoned HDF Member
Joined: Mar 2008
Posts: 5,134
Likes: 146
From: texas
i thought it would be electronic ignition too.it is an 81 though.i checked engine vin and it showed to be correct for an 81 xls.i checked it before i timed it and after i timed it with same results.---------i am not really worried about it as it runs good...starts right up and its not missing out.i did replace the coil with a hot coil but it still ran fine before and the points were set at .032.so...i dunno...i have no issues with it really i just wanted to understand it.as long as it runs good i wont be concerned...i am curious though.
Road Warrior
Joined: Sep 2006
Posts: 1,605
Likes: 82
From: nj
YeahI know how you feel I have a 84 bobber and I have to check mine out also.I know that 84 has electronic ign. but I cannot find the module and the coil measure 4.5 ohms which means that coil is for points and not for electronic ign.My bike was changed all over so now I have to get into it to find what I have with the point gap for future info thanks
Stage II
Joined: Jan 2013
Posts: 2
Likes: 0
From: Ontario, Canada
points gap
I'm running points on my twin cam using 75 sportster points and advance, and the factory 18 gap works perfectly.
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Road Captain
Joined: Jul 2005
Posts: 578
Likes: 60
From: New Jersey
If your using points you first set the gap ,then you set the timing.
For every .001 your tight ,the timing is advanced by 1 degree. For every .001 your large, the timing is retarded by 1 degree. That's why its important to get the gap set correctly, because it will affect the timing setting.
For every .001 your tight ,the timing is advanced by 1 degree. For every .001 your large, the timing is retarded by 1 degree. That's why its important to get the gap set correctly, because it will affect the timing setting.
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