here's a pic
tach installation
Road Captain
Joined: May 2010
Posts: 502
Likes: 2
Here's a pic of the tach drive unit.P/N 92079-71...
And here is a pic of an earlier cover.
See what looks like a bolt at the top center of the cover.That's a tach drive block off plug...
Used in place of the drive unit when tach is not used.If you don't have a drive unit yours should have a plug in it now.Or a wine cork or whatever happened to be handy at the time.I've got 1 here now with a carefully whittled-to-fit stick in it that looks to have been there for years.
Hope this info helps man.I've got a couple of ironhead engines laying around.If you need a tach drive shoot me an e and I'll check to see if one of them might have a drive unit in it...thanks,Junker.
And here is a pic of an earlier cover.
See what looks like a bolt at the top center of the cover.That's a tach drive block off plug...
Used in place of the drive unit when tach is not used.If you don't have a drive unit yours should have a plug in it now.Or a wine cork or whatever happened to be handy at the time.I've got 1 here now with a carefully whittled-to-fit stick in it that looks to have been there for years.
Hope this info helps man.I've got a couple of ironhead engines laying around.If you need a tach drive shoot me an e and I'll check to see if one of them might have a drive unit in it...thanks,Junker.
Last edited by junker73hd; Jul 16, 2012 at 03:26 PM.
Thread Starter
|
Novice
Joined: Aug 2009
Posts: 22
Likes: 1
thanks junker 73 hd
since i just ordered it today off of ebay,i'm not sure what comes with it.i have a speedo already but thought a tach would be useful ,too.
i'll let you know and thank you for the pics and info.it really helps.
since i just ordered it today off of ebay,i'm not sure what comes with it.i have a speedo already but thought a tach would be useful ,too.
i'll let you know and thank you for the pics and info.it really helps.
If the tach is from/for a 1981 Sportster you do not need the tach drive pictured above. The 81-on tach is electronic. It runs off either an electronic ignition or the ignition coil.
When you get the tach, ask, and i'll post the installation instructions.
When you get the tach, ask, and i'll post the installation instructions.
Road Captain
Joined: May 2010
Posts: 502
Likes: 2
Mick,I stand corrected...Jc,I apologize my friend.After you mentioned that you would need a cable I guess my brain switched to autopilot.I didn't snap to the tach being an 81 until reading Mick's post.If your cam cover is pre 86 you'll still need the block off plug...
Thread Starter
|
Novice
Joined: Aug 2009
Posts: 22
Likes: 1
Trending Topics
That is not a 1981-on electronic tech. It is the mechanical tach used from about 1974 to 1980. It requires a cable and the tach drive that was posted earlier in this thread.
What is the year of your Sportster? If you have a 1981-on Sportster you will not be able to use this tach because the tach drive will not fit into your gearcase.
What is the year of your Sportster? If you have a 1981-on Sportster you will not be able to use this tach because the tach drive will not fit into your gearcase.
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Verdad Gallardo
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
10 Motorcycles You Should Never Buy
Joe Kucinski
10 Things Harley-Davidson Needs to Fix in 2026
Verdad Gallardo
Thread Starter
|
Novice
Joined: Aug 2009
Posts: 22
Likes: 1
i have a 1981 engine.it looks as though i should have done a little more research.
anyone need a tach for an older bike?
i paid about $50 for this one and i should receive it in the mail this week.
ouch!
anyone need a tach for an older bike?
i paid about $50 for this one and i should receive it in the mail this week.
ouch!