Heads for the Harley Davidson Shovelhead

[@robertmayer2071]

i like the fact that mike will reply to your questions thanks mike

[@pacificmike9501]

Thank You for taking part in our stuff.

[@tonydivitto9113]

The Rob Ross of Harleys, love the content . You rock !

[@pacificmike9501]

Thank You

[@closertothetruth9209]

Yeh hes similar in nature

[@ProbablyStonedComments]

I think the same thing, so mellow. Couldn’t imagine him being upset enough to yell at someone. ✌🏻

[@ralphhedden1922]

I new that I recognized you while buying a tire . You were talking to the tire guy about tires. Thank you for your videos. You are the man. MLLH&R.

[@pacificmike9501]

Thanks 👍

[@kurtruppenthal9506]

Mike those heads are beautiful. No typical shovel exhaust bolt problems to deal with either. Can't wait to hear it run with those heads and your new cam. Potato potato potato.

[@pacificmike9501]

It will sound like a rather "lumpy," if not "raspy" potato. Thank You.

[@haroldmoles6884]

Mike thank you, because you are a blessing to us motor heads you remind me of my late great cousin who was also my best friend, Richard Mcnew AKA (Dicky) I'm so glad I've found your youtube video channel, thanks bro

[@pacificmike9501]

That's great. Thank You

[@servicarrider]

Your voice is engaging. You are the Bob Ross of Harley's as someone mentioned. For what it is worth. You have erred. Past tense of err.

[@pacificmike9501]

Perfect! Thank You.

[@pastorbobncc365]

Always love stopping by the garage have a blessed week my friend.

[@pacificmike9501]

Thanks, you too!

[@dennisc.1189]

Mike, the heads are awesome and a great mechanic knows when something is not right.

[@pacificmike9501]

Thank You

[@mrclean5038]

Yours is the only channel that I hit the like button on before watching.

[@pacificmike9501]

Thank You

[@waynejxrx]

I grew up on my dad's 78' FX Lowrider. I remember asking things like why are you using clothes pins on your bike, and why how come I can't kick it like you do? Hours in the garage watching him turn wrenches, before I had any clue what I was looking at. Long ago I lost my dad along with any knowledge he had to pass down. The bike, well that's another story. I thought of tracking it down but I also "know what I don't know", and realize I'd still have no clue what I was looking at. Then I stumbled across your channel, and it seems to be stuck on TV in the garage now. You remind me a little of him and having you on out here brings a lil piece of him back. I wanted to say thank you for sharing your knowledge and wisdom with the rest of us. It's truly a passion of yours and I am greatly appreciative. I've got a spot cleared out in the garage for her and I think it's time I brought her home. Always watching, Wayne Dunford Jr

[@pacificmike9501]

What a nice story, and what a compliment. Thank You and it sounds like you're preparing for an adventure.

[@louisflege3741]

Yet again, a great informative video. The mechanic that rebuilt my 74ci shovel motor a couple years ago wanted a set of STD heads, but couldn't find a new set as they don't make them anymore. I heard they aren't in business anymore. Sad, because I really wanted them. In any case, I'm glad you can show us what we'd be dealing with, were we to have them. Can't wait for the next one! Thanks for the education! Louis

[@pacificmike9501]

Thank You. I believe they are available. Look on the internet.

[@vernegibb621]

Your shovel is my favorite bike.

[@pacificmike9501]

Thank You

[@walterfechter8080]

I like those "runners" (ridges) inside the intake and exhaust ports. They DO increase velocity over stock heads. A buddy of mine ran STD Shovel heads on a 93" stroker build back in the 1980s. Dave Mackie did the port/flow work on those heads. ALL Panheads and Shovelheads should have 3 stud exhaust mounts. A good exhaust seal makes life easier for exhaust valves. Ride safe, Mike.

[@pacificmike9501]

Thank You

[@mattforsting4253]

Enjoy every upload Mike. Please keep doing what your doing as long as you can!

[@pacificmike9501]

Thanks, will do!

[@mmonty8027]

Mike , all your video's are worth watching. Keep up the good work.

[@pacificmike9501]

Thanks, will do!

[@frankks554]

Great knowledge Mike , I can’t wait to hear it again .... thanks for the video .

[@pacificmike9501]

Glad you enjoyed it. I'm waiting too.

[@godfellas483]

Love how you break things down into workable portions. Those heads DO look great!

[@pacificmike9501]

Thank You. I'm thrilled to have them now "corrected."

[@dray1842]

Never thought I'd be lusting after some heads, I will probably run ultima heads because of cash flow. Thank for the content.

[@pacificmike9501]

Thank You

[@darrell3368]

Thanks for sharing you don’t get to old to learn all the problems

[@pacificmike9501]

You got that right!

[@kennethpascual1312]

Hi Mike great video as always. Looking forward to the installation. Till then cheers Kenny

[@pacificmike9501]

Cheers. Thank You

[@TechnMoto]

Your on the money. Those are some beautiful heads. A thing of art really.

[@pacificmike9501]

Agreed! Thank You

[@Kelemen1]

Love his voice just iconic. And I learn a little something every time I watch his videos because I’m 30 but my FLT is from 1980 and while doing the motor rebuild I like to watch his videos to make sure I’m not missing anything

[@pacificmike9501]

Thank You

[@tomsmith1390]

It doesn't get any better Mike. Thank you for all you do and provide. Sorry about the set back.

[@pacificmike9501]

All's well. Thank You

[@juniorjr4815]

Very nice! Great explanation too. Looking forward to the next video as always. ✌

[@pacificmike9501]

Glad you enjoyed it!

[@needmetal3221]

You have a wonderful, humble way of describing your work. As bad as stock harley parts could be, the aftermarket stuff requires a greater understanding. Enjoy the process lol

[@pacificmike9501]

Yes "high performance" requires a little more attention.

[@MrBadgas]

Those look beautiful Mike!

[@pacificmike9501]

Glad you like them!

[@RogerJG21]

Great Video Mike, I always learn something new when I watch your videos.

[@pacificmike9501]

Glad to hear it

[@Mansfield55]

Can’t say it enough. Thank you for the time and effort of explaining the small details. This helps ten fold for someone new like myself in trying to rebuild my ‘84 FXR

[@pacificmike9501]

You're very welcome!

[@dray1842]

Can't wait for the rocker arm vid to find out if you cut the spacers or shim.

[@pacificmike9501]

I showed it before in a previous video. Shouldn't be hard to find. Just doing it again. I don't shim them, but I do set them.

[@jasonbarton4035]

They look awesome! They should work good!!!!

[@pacificmike9501]

Thank You

[@billvandyne4685]

Interesting presentation, Mike--thank you.

[@pacificmike9501]

Thank You. Glad you liked it.

[@elsdp-4560]

THANK YOU...for sharing. Very nice heads.

[@pacificmike9501]

Thank you too

[@donquijote1141]

Only those who do nothing do not make mistakes,Mike.Thank you for continuing to delight with new videos.

[@pacificmike9501]

Thank You

[@arthurleino]

Excellent video Mike. I have heard about dual plug heads for Hi Compression ones.

[@pacificmike9501]

Cool, thanks

[@Zerotys_ADV]

Just found your channel. Nicely done sir.

[@pacificmike9501]

Thanks and welcome

[@caspar0777]

Wow, thanks for the lesson! Very nice work has been done on those heads. I see you're exited to fit them. Me too! Cheers from France mate

[@pacificmike9501]

Cheers. Yes, I am.

[@charlescastell4638]

Wow, those are gorgeous. And expensive, according to the web site...! Looks like a bit of over-kill for a rebuild on a 93" stroker with a mild cam for daily use, though; thanks for showing them. It answered several questions for me. Appreciate your time and expertise.

[@pacificmike9501]

Thank You

[@markbarnhill6300]

Can’t wait to hear that shovel head run! I just got rid of my last shovel parts about a week ago.

[@pacificmike9501]

I hope you enjoy it.

[@mjscycles1544]

Glad you figured it out...

[@pacificmike9501]

Thank You

[@billmillar7234]

Very cool.....lol we all screw up somehow....bu like you said....its good we recognize what we don't know....hopw you get some riding in soon

[@pacificmike9501]

I ride often, usually daily.

[@michaelmitchell5909]

Awesome heads Mike. I just got high compression KB pistons in my twin cam with heads done and it pulls like a steam loco. Really powerful upgrades and I'm hooked. I've taken your advice to run it easy for 500 miles...I have about 300 on it now and it runs better every time I go out

[@pacificmike9501]

I love good news. Thank You.

[@frankmccracken743]

Once again nice video Mike. Informative, but FYI, I cannot wait to see more of the UL. This is one cool build!!

[@pacificmike9501]

More to come! Just catching up on everything else first.

[@louiskerckhove8704]

Great stuff mike, if you have that gut feeling, you should probably stick to it... Ride safe!

[@pacificmike9501]

You got that right! Take care.

[@dscott501]

Up until now I thought my shovelhead was all good. Now I’ve got expensive new thoughts...

[@pacificmike9501]

I get it.

[@ludditeneaderthal]

A step closer to Sonya's sidecar rig (which she'll be kind enough to let you ride, lol)... "smart enough to know what I don't know", wise words we all wish we knew back when we knew it all

[@pacificmike9501]

I learned it early. It opens me up to learn.

[@timmix331]

Makes me happy 👍🖖

[@pacificmike9501]

Yah, it does for me. Glad you're enjoying it.

[@Wooley689]

Not many of us would have figured that out Mike.

[@pacificmike9501]

I had to call on the "Big Kahuna" myself.

[@tonycurtis4427]

Thank you

[@pacificmike9501]

Thank You

[@lee-ob2pm]

Thank u, I see my next improvements. Dual plugs, and the 3 stud seal on exhaust is cool

[@pacificmike9501]

I think so.

[@philhinson979]

Hi Mike, I love your videos! This is great for me because I just finished building a 74” shovel with STD heads.* Mine are single plug but otherwise the same as these. I’m excited to watch the rest of your build. My request is: could you talk about break in for a freshly built shovelhead? There’s a lot of information out there, much of it conflicting, about heat cycles and how to properly get new rings to properly seat in freshly honed cylinders. I’d love to know your process. I trust your advice a lot more than the others! * also jugs honed to 20 over, weisco 20 over 9:1 pistons and rings, andrews b grind cam, delkron cases, ratchet top 4 speed in an STD case (rebuilt by me), 1.5” belt open primary, hand shift, chain final drive, spin on oil filter, evo oil pump, hydraulic lifters Thanks for your great work, Phil

[@pacificmike9501]

Sounds like fun to me. Okay, we'll talk about it.

[@shawnreynolds1316]

Appreciate you and your team.

[@pacificmike9501]

Thank You

[@LonesomeNomad137]

As usual, great info.

[@pacificmike9501]

Thank You

[@tommontague5721]

Hi Mike, Question?....When you run dual spark plugs to each head, do you use a four coil system, or does one coil have two plug wires one for each plug?.... or run it off a mag system?

[@pacificmike9501]

Just about anyway you like. I run two coils. But, there are four terminal coils using single fire operation. Lots of options.

[@tommontague5721]

@@pacificmike9501 ....Thanks Mike

[@jameshaines3370]

Those are sweet.

[@pacificmike9501]

I think so too!

[@stanroberts4820]

I was just thinking that I haven't seen a new video from you yesterday, and then you put out a new video! Does that make me psychic, or you....? Beautiful heads!

[@pacificmike9501]

Thank You. I believe everyone is psychic. Just gotta learn to listen to it.

[@divine_swine9665]

i missed the vid yesterday, so i had to catch it today.... i'm not superstitious or anything and i hope you are not either, but i had to be the one to roll the "like" counter from 777 to 77...8. oh well... nothing and/or nobody is lucky all the time. hope you're having a good one

[@pacificmike9501]

Thank You

[@lars1230]

What all is involved in tapping the heads for duel plugs? How involved is if? Thanks, Love your videos. My old ‘83 FXDG is still running strong.

[@pacificmike9501]

When I first did mine, back in the early eighties, we had a fixture we used on a drill press. Ask around your area.

[@dogpaw775]

blessed be the machinists.

[@pacificmike9501]

You bet.

[@shovelhead4558]

Would love to see a rachet top gearbox rebuild thanks for all the info.

[@pacificmike9501]

Next time I do one. The only one I have is in the Knuckle. Working very well, at the moment.

[@markbass4622]

Sick heads,,your thoughts on those heads with a set of delcron case's?

[@pacificmike9501]

Sure. Why not?

[@davidfeinberg5599]

Gonna follow you close on this one Mike..... I've been itching to pull the trigger on these for heads for my '67 Genny for about a year now. This could be the factor in me parting with that hard earned cash ! ! When do you think you'll have it up and running ? As always.... love your channel, your content and your wisdoms. Stay healthy stay safe.

[@pacificmike9501]

You too. Shouldn't take long. Waiting for a couple things. Should be very soon.

[@bloodofjesus7able]

PRAISE JESUS NAME ABOVE ALL , FOR MIKE'S GARAGE HD TECH. OLD SCHOOL BUILDING HD

[@pacificmike9501]

Thank You

[@WiSeNhEiMeR-1369]

Howdy Mike, Glad to see the "STD" Heads back again Harley-Davidson abandoned the HEMI Head for the "SQUISH" Area on the EVO Heads Did H-D ever incorporate the DUAL-Spark-Plug concept ? COOP ....................................................

[@pacificmike9501]

Yes, on some of their 1200 Evo Sportsters.

[@blainenestel2355]

Have some of the earlier shovelhead videos been taken off? I can't seem to find the ones I am looking for to help me with my engine build.

[@pacificmike9501]

Just go to pacific mike and tap on "videos."

[@newdogatplay]

Liked an loved the videos,

[@pacificmike9501]

Awesome, thank you!

[@crspcritter]

Right on ; always tinker’n - 😁 I have std shovelheads dual plug. Well never hooked up second plugs . Had a hd mechanic tell me if you loose a plug and timing is retarted you could burn a piston . 😁 well thanks for your info on that . My twin cam going big bore high compression ; mid range cam in it . Someone mentioned 1:7 rockers for it from screaming eagle .$200 well 🤔 more lift . But piston valve clearance check a must !!!. Have good day sir - ✊👍🏻👌😎

[@pacificmike9501]

Thanks for sharing

[@crspcritter]

@@pacificmike9501 ✊👍🏻👌

[@closertothetruth9209]

cousins had dual plug nissans they were very economical

[@pacificmike9501]

I wasn't looking for economy, but that's cool.

[@closertothetruth9209]

@@pacificmike9501 more power from the same amount of fuel i guess, we got the same when we installed hho cells we made , old school deisels respond very favourably to a small amount of hho gas, it ignites so fast it helps for a more complete burn of the fuel resulting in significant economy gains and power. My freinds being doing since 78 hes a mechanical engineer and heavy duty deisel mechanic he taught me the 100 plus year old tech.

[@1masterfly1]

Oh crap moments! Glad it didn't go critical mass before you could re purpose em.

[@pacificmike9501]

Thank You. All's good.

[@JakeSouza1]

Thanks for another great video Mike. I've always been curious about how you go about removing old gasket material when you disassemble a motor. Looks like most of your parts are super clean so I assume maybe its bead/vapor blasting? Would love to see how you recommend going about it to avoid marring mating surfaces.

[@pacificmike9501]

I usually clean mating surfaces with scotchbrite.

[@DrErickLopez]

Another great video Mike! Got a question for you. How do you remove and replace the rocker box studs on a 1977 FXE? I’m trying to remove mine and it’s a bit of a pain. Any good advice? I don’t recollect seeing a video where you replace or remove them.

[@pacificmike9501]

My advice is, "Don't do it unless you have to." They have a tight interference fit. Getting them out usually maens destroying the threads in the head itself. I believe V-Twin carries replacement studs. It is a nightmare at best.

[@jaythe306snowmexican]

I'm running S&S daul plugged heads on my 96" shovel, I like using KB pistons I shaved the heads 8 thousands so it's about 11:0:1 compression and a C grind cam solid lifters.

[@pacificmike9501]

That's a pretty potent mixture of stuff. Awful lot of compression though.

[@jaythe306snowmexican]

@@pacificmike9501 and it's kick only 😂

[@pacificmike9501]

And, my hat is off to you. Awful lot of compression.

[@petekosar8379]

Beautiful head's Mike! What size valves are ya running?

[@pacificmike9501]

Stock.

[@petekosar8379]

@@pacificmike9501 thanks my Brother!

[@Snorky_88]

Whats your opinion on the STD and S&S stuff? Im sort of a purist and try really hard to keep my pan or shovel mostly all harley. But i need a set of heads for my shovel might go with the STD ones like this one in the video.

[@pacificmike9501]

My opinion? It's all good stuff. Just matters what you want.

[@marcuslambert2162]

mark of an intelligent man is knowing when he doesn't know

[@pacificmike9501]

Does that mean I had to make mistakes to find out I was wise? No, I'm probably wrong again.

[@hekterr6677]

The 3 stud exhaust port is a savior..the factory should have done that..

[@pacificmike9501]

The factory mounted the pipes well. They supported them well. The pipes were fully supported and the one stud just located them. It's when we mounted custom pipes that the problems started. I've learned the hard way, if we mounted them as well as the factory, we would have been fine. But, the three studs are even better.

[@knowitallhendrix]

These are nice heads. To bad STD isn't in business making these anymore.

[@pacificmike9501]

I don't know. They appear to be available on the internet under STD Heads.

[@vanlifethetravelinfranksho5611]

Did shovel heads ever come from the factory with dual plugs or is it strictly aftermarket? Those do look sweet Mike.

[@pacificmike9501]

Thank You. No, Shovelheads did not.

[@josephcivita1450]

Hello Mike, first off I just want to say I really enjoy your videos. Your presentation is very clear and concise and your calm demeanor is Pleasant. I have a question for you. I have a 1979 Super Glide. It has the original engine in it which according to the number on the frame starting with 5E was originally 74 cubic inch. But I know that it has been upgraded to 80 cubic inch. I know that it does not have the stock cam in it although I do not know which cam is in it. It has solid lifters which I have carefully adjusted. I have a little bit of noise in the top end once the engine is warm which I assume means the end play on the Rockers need to be adjusted. It's not a hard job I've done it before. Anyway on to the question. When the bike is warmed up when I blip the throttle as I let off just as the RPMs settle down I get a rattle sound. I'm thinking it may be the compensator. What are your thoughts on that? Thank you in advance Mike.

[@pacificmike9501]

This is obviously not your first rodeo. Compensator rattles can be really loud and deep, and sound like everything's coming apart. Quite often the spring on the compensator is "tired" and I'll add a flywheel washer under the nut, just to tighten the spring a little. Could be your primary chain is loose. Check the tensioner. I've chased so many rattles that I tighten everything I can think of when I service the bike. It can be an exhaust pipe or the skid plate, or the chain guard. Sometimes you just gotta go crazy 'til you find it.

[@josephcivita1450]

Yes, been there, done that! Thank you for the advise brother. I run a one man shop working on bikes. But no matter how long you've been doing it there is always something to be learned. That's one of the reasons I enjoy your videos. Thank you Mike for your knowledge and taking the time to respond, I greatly appreciate it.

[@oneman1812]

Too K00l 0LD SK00L, THUMBZ UP!. TELLN THEE TRUTH!.

[@pacificmike9501]

Thank You

[@TheKinemat]

Dear friend, Greetings from Europe. I would like to know a little bit more about what was the problem with the rocker arms! I didn't understand. Thanks

[@pacificmike9501]

Simply put: the roller tips couldn't smoothly align with the tops of the valve stems.

[@TheKinemat]

@@pacificmike9501 Thank you very much! I have the same heads for my next project and I planed to use evo roller rocker arms..... What do you recomend? I will have the same problem? Best regards from Spain.

[@wayneeaton3217]

Hey Mike . I have a 47 61EL engine I suspect leakage under the rocker arm tins in the past . The engine is on a stand . Do you have any tips such as maybe filling valve spring area with alcohol etc. and if leakage is found is there any remedy that doesnt require valve guide removal as I know engine ran well previously ?

[@pacificmike9501]

Normally, the problem is either there is too much oil going up there or the oil is not draining out, therefore, it fills up and leaks out. Oil pressure can be adjusted at the pump, and /or the drain tubes can be cleaned out with a fairly stiff, but flexible wire. This is in the Knucklehead service manual.

[@peteosinga8845]

Nice way to get a head

[@pacificmike9501]

Well said.

[@johnnyo1952]

Michael, I have the 4 plug 81 Shovelhead 80”. Replaced the S&S super E, and wanted to plug it for fine tuning. My point; left side plugs are long shank, plugs on the right short shank. 😮 I looked at the threads on the head and the left side thread cavity is definitely longer, verses on the right short thread cavity. Can you tell me if Harley intended to do that, it’s crazy if it is… help please

[@pacificmike9501]

It's the way the heads were cast. On my original 77 heads, which we dual plugged back in the eighties, I used Champion J12YC plugs on the right and Champion N12YC on the left. This could be different with different year and manufacture heads. I think S&S does what I did. Call them and ask them.

[@johnnyo1952]

Thank you brother, I dig your channel and you’re very helpful. Thank you for your time 💯😎

[@thekrutchinator]

What is the advantage of the O ring type inlet manifold?

[@pacificmike9501]

They fit and seal much more easily.

[@brianwinters4991]

I know you don't like giving out certain info , but what kind of compression are you running ?

[@pacificmike9501]

Without cc-ing the chambers, the pistons are 9 1/2 to one.

[@johnjaco5544]

What kind of valve guides are you gonna be using? Jimms?Harley? And what clearances Do you run Between the valve stem and the valve guides on intake and exhaust? Installing valve guides into the head Is really important Can you show us a video on how you install your valve guides into the head?? And how you size The valve guide To the hole in the head? Thanks for the video

[@pacificmike9501]

Sorry, they are done. We did these quite a while back. The guides and valves are Kibblewhite. I use factory specs.

[@johnjaco5544]

@@pacificmike9501 Ok just wanted to see if our specs were the same. On setting the guides you put your heads In the oven at 350° for about 1⁄2 hour. You put your guides in the freezer overnight, Then you have to have the right feel for tapping The guides into the head It's pure feel.. But the guides have to be sized for the correct size hole in your heads. all valve guides are sized differently, It depends on how many times that head has had a valve job and wallowed out the guide hole Previously.

[@gothicstar6]

I have dual plug heads on stock shovelhead 1981 that have not been started, but im not shure what length plug to use on the right hand side can you recomend short plug length?

[@pacificmike9501]

I had dual plugs in my late 77 heads. I used RN12Yc's on the left and RJ12YC's on the right. Those are Champion numbers.

[@kimedmond5377]

What exhaust besides drag pipes should I get ? 81 shovel Sturgis

[@pacificmike9501]

That depends on you.

[@cassel53]

I have a 77 with duel plugs. What spark plugs do you use?

[@pacificmike9501]

Depends on the year heads which decides whether you're using short or long reach. Short reach RJ12YC, long reach RN12YC. When we did my 77 heads (many years ago), to get everything in the right place, I had RN's on the left side and RJ's in the right side. Consult the ignition mfgr. for plug gap.

[@jeffreyhill7990]

I got a crane cam for my shovel, is that a good idea?

[@pacificmike9501]

Cam selections are personal choices. If you read about it and you selected it based on what you want it to do, and it will fit your engine properly (the mfgr. probably told you that one), then it's a good idea. I've run so many cams just to experience the differences, that I don't generally make recommendations on them.

[@gratefulshovelhead74]

Hey Mike. Would a case to oil tank vent line not being installed cause problematic oil priming issues? (82 Shovel 5Speed)

[@pacificmike9501]

It is necessary. Do you mean engine crankcase to oil tank? If so, that could be quite an issue.

[@gratefulshovelhead74]

@@pacificmike9501 yes that's right. OK. Thank you.

[@gratefulshovelhead74]

@@pacificmike9501 Where can I email you?

[@charlottesantafe1709]

Ow! Makes my brain hurt in a good way. No wonder you were I err, complicated configurations. And for those of you who may think brain hurting is indicative of not understanding, you are almost correct, brain hurting occurs mostly when you're actively trying to comprehend a difficult concept or learn a new task or action. Personally, I don't mind leaving this brain bending action packed video content to my builder. I know when I'm at my limit. I like the double spark info tho.... almost sure mine does not need more juice though.

[@pacificmike9501]

Not more juice, a better and more complete combustion.

[@charlottesantafe1709]

@@pacificmike9501 I'll watch the video again later, I learn better that way. 👍thanks.

[@timothyputzke1250]

Thank you Mike, Only years of experience lets you know when something just isn't quite right. Parts for shovelheads are getting harder and harder to find. There is of course aftermarket, mostly Chinese made. In Minnesota there's a very small town called Cosmos. Dan & Angie Cairl have new and used Motorcycle parts. They buy and sell. There phone # is 320-440-0000, mailing address 200 N Jupiter St. Cosmos MN. 56228. I hope it's okay to post this. They were recommended by a parts man in a Harley Davison dealership who also loves shovels. As always Keep the rubber side down.

[@pacificmike9501]

Thank You.

[@brianmcintee7303]

my local shpo on long island sends their heads to dave mackey all the way across the country

[@brianmcintee7303]

i meant shop not shpo

[@pacificmike9501]

Yes, he does a bunch of them. I'll show a pair of Evo heads he's doing very soon.

[@jackwillson8099]

Valve guide guides intake 0.0009 & exhaust 0.0012 to be perfect & seat with 0.045 intake 0.050 on exhaust , got 20,000 mile out of a couple heads i did for customers

[@pacificmike9501]

Must always be caeful to adhere to what the manufacturer recommends. Metal compatibility is a major factor. Stainless valves? Nitrided? Bronze or castiron guides? Running seals? 20,00 miles is not very long. But, I don't know what heads you're using. I assume they are Shovelhead. And, I don't mean to be rude. Locale has a lot to do with it too.

[@jackwillson8099]

@pacificmike9501 bronze 630 nickel valve & cast iorn ductile guides,with viton seals pm valves,& live on the east coast, I have got some that are 30,000 miles ,it all depends on what cam your running , you run a lienweber L61 10,000 to 12,000 ,it all depends on lift I have run .625 in shovelheads ,if stem Protrusion left stock,they last long ,as for heads Oem harley shovelheads ,STD heads ran & build lots of these heads new Lou from STD ,ultima head not bad ,but they use soft bronze don't last & they use ferrai valve are junk too soft there made in Brazil

[@pacificmike9501]

Great info. Thanks.

[@DeeInTheHouse]

You can use machinists blueing dye to verify the point where the rocker strikes the valve stem...

[@pacificmike9501]

Yes.

[@frankbottomley5465]

Can't wait til you do a shovel head starter rebuild....just sayin

[@pacificmike9501]

I use newer, better starters.

[@frankbottomley5465]

@@pacificmike9501 ah..

[@bigroryhollar5023]

🍻🇺🇸

[@pacificmike9501]

Thank You

[@jackwillson8099]

Lost count of how many heads i rebuild & re weld ,dual plug ,seats

[@pacificmike9501]

Very cool.

[@danoweston6185]

I've a friend who runs dual plugs! Never understood the advantage.

[@pacificmike9501]

Quite simple, flame fronts going toward the middle (in a hemispherical chamber).

[@danoweston6185]

@@pacificmike9501 thanks! Meant to say I didn't get it until I watched this video!

[@pacificmike9501]

Cool. Thank You