Shovelhead A place to talk about Shovelheads.

1979 shovelhead valve seal useage

Thread Tools
 
Search this Thread
 
Old Apr 14, 2017 | 02:22 PM
  #1  
mcarefoot58's Avatar
mcarefoot58
Thread Starter
|
Stage II
Joined: Apr 2017
Posts: 2
Likes: 0
From: ontario
Default 1979 shovelhead valve seal useage

i have a stock 1979 shovelhead the heads are completely factory stock original guides and valves the bike had low miles on it and it sat awhile.i got the heads cleaned up valves and seats reground and lapped in. i also had valve seals installed on the intakes only i was told that they suck more oil than the exhaust .the valve stem to guide fit was good no signs of wear. my question is that can you use valve seals on stock factory parts valves of that year by the way the motor is an 80 cubic . thanks mike..
 
Reply
Old Apr 16, 2017 | 07:26 PM
  #2  
johnjzjz's Avatar
johnjzjz
Seasoned HDF Member
15 Year Member
Top Answer: 3
Joined: Nov 2006
Posts: 12,878
Likes: 5,449
From: la la land jerzey
Default

we use valve seals on every thing today all the way back to the mid 30s on both intake and exhaust

reason the oil today does not mix well with the garbage fuel we are all buying - so sealing the valves with seals, the antique machines and adding I like lucas 2 stroke oil to the gas, couple oz a tank full keeps the motor very clean, and the top end overhauls go from 5000 miles 30s and 40 machines to 20,000 miles
 
Reply
Old Apr 18, 2017 | 10:55 PM
  #3  
CRASH69's Avatar
CRASH69
Tourer
Joined: Oct 2010
Posts: 349
Likes: 22
From: Jersey
Default

^^^^^^ You learn something new everyday....two stroke oil doesn't make it smoke? Does it change A/F mixture or Idle? Good for Shovelhead? Thanks....
 
Reply
Old Apr 19, 2017 | 06:06 AM
  #4  
98hotrodfatboy's Avatar
98hotrodfatboy
Seasoned HDF Member
15 Year Member
Liked
Loved
Top Answer: 5
Joined: Mar 2010
Posts: 21,064
Likes: 7,591
From: Poolville
Default

Originally Posted by CRASH69
^^^^^^ You learn something new everyday....two stroke oil doesn't make it smoke? Does it change A/F mixture or Idle? Good for Shovelhead? Thanks....
On a 3 gallon tank it's only a ratio of 192:1. Where most two stroke motors today require 50:1 so I don't think your gonna notice any change in AFR's or smoking....

John? Would that be good for hi compression Evo's?
 
Reply
Old Apr 19, 2017 | 06:42 AM
  #5  
johnjzjz's Avatar
johnjzjz
Seasoned HDF Member
15 Year Member
Top Answer: 3
Joined: Nov 2006
Posts: 12,878
Likes: 5,449
From: la la land jerzey
Default

my son owns a factory 2 stroke race bike that has 14 to one compression stock - klotz - lucas and many dealer race 2 stroke oil not only works well but keeps the combustion chamber clean of deposits

yes to the question on shovel - I have used that in everything 2 stroke oil - also marvel mistry oil - also they - startron makes a enzyme that converts the alky in the fuel we are buying to a burnable product and increases the octane, it works so well my copy of the 1998 national championship road race motor we did in my buell no longer vibrates at hi way cruising speed
 

Last edited by johnjzjz; Apr 19, 2017 at 06:53 AM.
Reply
Old Apr 19, 2017 | 08:12 AM
  #6  
Architect's Avatar
Architect
Seasoned HDF Member
15 Year Member
Joined: Apr 2010
Posts: 9,524
Likes: 7,861
From: Long Island, New York
Default

Well by us Marvel Mystery Oil is readily available, a couple of ounces in each fill up is easy insurance to keep the top end all clean.

John do you like it in the Evo/Twin Cam bikes as well or vintage only? Using the same shitty gas in all the bikes unfortunately.
 
Reply
Old Apr 19, 2017 | 09:54 AM
  #7  
72 Ironhead XLH's Avatar
72 Ironhead XLH
Road Captain
15 Year Member
Joined: Jul 2005
Posts: 578
Likes: 60
From: New Jersey
Default

1+ on the MMO , stuff really works . A few oz`s of100LL also works well too
 
Reply
Old Apr 19, 2017 | 06:09 PM
  #8  
johnjzjz's Avatar
johnjzjz
Seasoned HDF Member
15 Year Member
Top Answer: 3
Joined: Nov 2006
Posts: 12,878
Likes: 5,449
From: la la land jerzey
Default

Originally Posted by Architect
Well by us Marvel Mystery Oil is readily available, a couple of ounces in each fill up is easy insurance to keep the top end all clean.

John do you like it in the Evo/Twin Cam bikes as well or vintage only? Using the same shitty gas in all the bikes unfortunately.
the 2 stroke racing stuff it the ***** when it comes to keeping the engine in top shape - i have lots of weed wacking to do at my place and that thing is wide open for a couple hours for years on end and it cant wait till i start it to do it again

PS i am shooting for next week end for you
 
Reply
HD Forum Stories

The Best of Harley-Davidson for Lifelong Riders

story-0

7 Surprising Harley-Davidson Products that Are Not Motorcycles

 Verdad Gallardo
story-1

8 Best Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-2

10 Worst Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-3

Killer Custom's Jail Break Is The Breakout That Refused to Blend In

 Verdad Gallardo
story-4

Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?

 Verdad Gallardo
story-5

Harley-Davidson Reveals Super Cool Cafe Racer Concept

 Verdad Gallardo
story-6

Engraved Rebellion: Inside Bundnerbike's Glam Rock II

 Verdad Gallardo
story-7

10 Motorcycles You Should Never Buy

 Joe Kucinski
story-8

10 Things Harley-Davidson Needs to Fix in 2026

 Verdad Gallardo
story-9

Southpaw Super Glide: A Left-Hand-Drive 1979 Harley FXE Built to Fit the Rider

 Verdad Gallardo
Old Apr 20, 2017 | 09:58 AM
  #9  
Architect's Avatar
Architect
Seasoned HDF Member
15 Year Member
Joined: Apr 2010
Posts: 9,524
Likes: 7,861
From: Long Island, New York
Default

Originally Posted by johnjzjz
the 2 stroke racing stuff it the ***** when it comes to keeping the engine in top shape - i have lots of weed wacking to do at my place and that thing is wide open for a couple hours for years on end and it cant wait till i start it to do it again

PS i am shooting for next week end for you
All of a sudden my Thursday is a better place, thanks.
 
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
tbonetony
Shovelhead
7
Aug 24, 2017 06:05 AM
marl
Shovelhead
11
Oct 25, 2014 01:51 PM
tc
EVO
2
May 2, 2011 10:35 PM
shuvlhedfred
Shovelhead
15
Apr 28, 2010 04:46 PM
Reffixer
Exhaust System Topics
7
Jan 10, 2006 01:22 PM




All times are GMT -5. The time now is 05:38 AM.

story-0
7 Surprising Harley-Davidson Products that Are Not Motorcycles

Slideshow: The bar-and-shield logo shows up on far more than motorcycles, some of the company's most unexpected products have nothing to do with riding.

By Verdad Gallardo | 2026-04-29 16:50:35


VIEW MORE
story-1
8 Best Harley-Davidson Motorcycles Ever

Slideshow: Not every Harley gets it right, but these are the ones that genuinely earned their reputation.

By Pouria Savadkouei | 2026-04-15 14:23:21


VIEW MORE
story-2
10 Worst Harley-Davidson Motorcycles Ever

Slideshow: From the troubled AMF years to modern misfires, these bikes earned reputations for reliability issues, questionable engineering, or disappointing performance.

By Pouria Savadkouei | 2026-04-01 20:01:09


VIEW MORE
story-3
Killer Custom's Jail Break Is The Breakout That Refused to Blend In

Slideshow: Killer Custom's "Jail Breaker" build focuses more on stance and visual aggression than mechanical overhaul.

By Verdad Gallardo | 2026-03-18 19:20:32


VIEW MORE
story-4
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?

Slideshow: The Swiss custom shop has taken a Harley Softail and stretched it into something so long and low that it looks closer to a rolling sculpture than a conventional motorcycle.

By Verdad Gallardo | 2026-03-07 16:15:30


VIEW MORE
story-5
Harley-Davidson Reveals Super Cool Cafe Racer Concept

Slideshow: Harley-Davidson's new RMCR concept revives the café racer formula with modern hardware-and it may be exactly the reset the company needs.

By Verdad Gallardo | 2026-03-04 12:23:37


VIEW MORE
story-6
Engraved Rebellion: Inside Bundnerbike's Glam Rock II

Slideshow: A standard cruiser becomes an intricate metal canvas in the hands of a Swiss custom house known for pushing Harley-Davidson platforms far beyond their factory brief.

By Verdad Gallardo | 2026-02-24 18:19:44


VIEW MORE
story-7
10 Motorcycles You Should Never Buy

Slideshow: There is no shortage of great motorcycles to buy, but we would avoid these ten.

By Joe Kucinski | 2026-02-19 14:50:51


VIEW MORE
story-8
10 Things Harley-Davidson Needs to Fix in 2026

Slideshow: Harley-Davidson's challenges aren't abstract; they show up in dropping shipments, shrinking dealer traffic, and strategic decisions that aren't yet translating into growth.

By Verdad Gallardo | 2026-01-13 18:33:17


VIEW MORE
story-9
Southpaw Super Glide: A Left-Hand-Drive 1979 Harley FXE Built to Fit the Rider

Slideshow: Graeme Billington's left-hand-drive Shovelhead is as much about problem-solving as it is about classic Harley form.

By Verdad Gallardo | 2025-12-30 11:27:08


VIEW MORE