Same old shovelhead primary question
Seasoned HDF Member
Joined: Jan 2011
Posts: 157,439
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From: Michigan 15 Minutes East Of Hell
That's what I did. :>)
Seasoned HDF Member
Joined: Jun 2015
Posts: 8,055
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From: Canada
Harley had a front belt then switched to a chain which is more costly, why would they do that? Ive been getting conflicting opinions on converting mine to a narrow primary belt suggesting if I ride it aggressively Ill go through belt a year.
Input welcome!
Input welcome!
Seasoned HDF Member
Joined: Nov 2009
Posts: 15,705
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From: Farmington ,MS
Did you remove the suction line from the oil pump to the primary?
The primary needs to be vented...I always use the line that dripped oil on the chain as the vent
Road Master
Joined: Apr 2012
Posts: 979
Likes: 38
From: new orleans,la
does a 3000 hp dragster use a belt? -- when I had my 80" with the L3S cam and other goodies , I ran the snot out of that bike - I had the same belt drive - I went more than a couple of years on a belt - also when the belt brakes it doesn't do the damage a chain does -- I went 1 step more - I added the rear chain tensioner - those 2 combined make a smooth ride..
Seasoned HDF Member
Joined: Jul 2014
Posts: 8,573
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From: Cental, MI
does a 3000 hp dragster use a belt? -- when I had my 80" with the L3S cam and other goodies , I ran the snot out of that bike - I had the same belt drive - I went more than a couple of years on a belt - also when the belt brakes it doesn't do the damage a chain does -- I went 1 step more - I added the rear chain tensioner - those 2 combined make a smooth ride..
Control is desired... springs???? No thanks.
Only reason anyone around here ever went Belt Primary was Cost... same with going Chain on rear... bunch of COB's...
Or... some of us have a set of cases with the oring groove [primary] broken... hard to seal..
I have found very little difference in Belt vs Chain primary on a Street bike.. And while Sealing the primary has been all the Rage... I have Yet to see any real advantage... including the "crap thru the system" argument... that simply implies we should change oil filters at the scheduled interval!!!
When the 1979 FXS is completed here.. it will be Totally Stock... and I won;t feel a Bit Bad about it...
The last shovel that left here was Stock... and had 60k original miles on it.. just let maintenance be yer Guide..
Edit; just went out to the shop, and only 2 bikes with oil under them..both coincidently have belt Primaries!!
Last edited by Racepres; Sep 11, 2018 at 07:58 AM.
Seasoned HDF Member
Joined: Jun 2015
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From: Canada
Not interested in using a red roller skate wheel on my bike thanks.
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Road Master
Joined: Apr 2012
Posts: 979
Likes: 38
From: new orleans,la
this is another really nice item-- its a inner primary case saver-- we have all seen where the rear chain has rubbed on the inner primary where the starter housing goes -- this keeps the chain from damaging the case -- this in connection with the rear chain tensioner keeps the chain from damaging the case.. comes in white also -- sorry no red
Seasoned HDF Member
Joined: Jan 2011
Posts: 157,439
Likes: 56,998
From: Michigan 15 Minutes East Of Hell
this is another really nice item-- its a inner primary case saver-- we have all seen where the rear chain has rubbed on the inner primary where the starter housing goes -- this keeps the chain from damaging the case -- this in connection with the rear chain tensioner keeps the chain from damaging the case.. comes in white also -- sorry no red