Tricks To Cleaning Dirt Bike Engine Cases
Tricks To Cleaning Dirt Bike Engine Cases

of course every engine build starts at
the cases somebody get these Co 250 cases ready to go back together by
popping out the old bearings as studs shining up the cases and cleaning up the
gasket surfaces the majority of these bearings can be removed by heating them
up and knocking them out from the opposite side however with a bearing
like this where there’s no access from the other side that will have to be
removed with a blind bearing polar and then a few of these bearings have
retainers holding them in a place so I’m gonna have to remove the screws and
bolts holding them on most of the time these bolts and screws are gonna be
locked headed so I’m not gonna even bother trying to get them out without
heating them up first now for the Phillips screws the head strip out
really easily so I’m not gonna take any chances with them just going to go
straight ahead and use the impact screwdriver
I’ll have this tool link down in the description I tell you what guys these
screwdrivers work without fail 100% of the time
super super handy to have all right I’ve got a few seals to pop out and then I’m
gonna heat up the bearings and knock them out of the case all right got a socket that fits just
inside the hole on the case here and I should be able to give it a whack and
the bearing will fall out I’m gonna go ahead and give the case some more heat
here and the reason why heat works in the situation is because the case is
aluminum the bearing is steel and aluminum expands at a quicker rate then
steel does and so why this works is when the case is heated up the bearing will
have more room to slide out I don’t know if you guys caught that or not but when
I flipped the case over this bearing just fell right out I really wanted to
show you guys that blind bearing polar but I might need to use it on this
needle bearing here so I’m gonna try the same thing on the needle bearing here
heat it up flip the case over and hopefully it falls out no such luck using that method so on to
the blind bearing polar it is hopefully I have one that’s big enough basically
how this polar works is as always tightening those two pieces against each
other it expanded down inside the bearing so I’ve got a firm grasp on the
bearing as soon as I thread in the slide hammer to the polar I’ll build the yank
that bearing right out pretty dang slick if you ask me works awesome on wheel
bearings linkage bearings case bearings you name it it’s got pretty much every
size you’d ever need I’ll link this tool down below as well the last thing to
pull off this case are the cylinder studs never hurts to go ahead and
replace those to remove them I’ll be using the double nut technique sounds
dirty but I promise it isn’t all those be walking to nuts against each other on
the stud and that will enable me to thread the stud out of the case now I’ve got this case completely bare
just gonna follow the same steps with the other case now for the inner clutch cover I’m just
got a few seals and a bearing to pull out all right the cases are completely
bare at this point and I’ve got my work area all cleaned up the next step is
gonna be shining these things up I’m gonna start out by putting the
scotch-brite wheel on the buffer and knock it out as much as I can with that
and then I’ll move on to the dremel tool and I’ve got a couple attachments here
some scotch-brite wheels and a few brass wire attachments as well I want you guys
to take a good look at the cases right now how dull and plain looking they are
in a few minutes I’ll have them looking so much better man this scotch-brite wheel is really
working some magic on the crank case however there’s still a lot of rock
chips and pitting on the bottom side so I’m gonna try the more aggressive scotch
brite wheel and see if I can smooth some of that out that is simply mind-blowing it’s like a
brand-new crankcase all over again I’m gonna pop the other scotch-brite wheel
back on and smooth this thing out even more alright that’s about as far as I can get
with the scotch brite wheel on the buffer now if only I can get the rest of
the crankcase looking this good I’d be stoked as you can see I can’t really do
much in these tighter areas with the scotch brite wheel on the buffer so I’m
gonna bust out the dremel tool with the brass wire cup and I’m really really
hoping I can get that same type of finish so the brass wire attachments bore down
pretty quickly so I’m going to give this Scott’s part wheel a try now the scotch-brite wheel seemed to work
okay just wore down super quickly so I’m pretty happy with how the brass
attachments worked but the only thing is they left like a brass color on the
finish so I’ve been trying the regular wire wheels here I got a straight one
and a cup as well and these seem to be the ticket for getting a similar finish
to what I got with the scotch-brite wheel and a buffer without the brass
color all right I’ve got the left case all
shined up and this is what it looks like compared to the right case pretty
dramatic difference so I use a combination of the wire and scotch-brite
wheels not really a big fan of these brass wheels they just left kind of a
brass look to it and the regular wire wheels seem to work a lot better keep in
mind if you’re gonna be using these scotch-brite wheels have a lot on hand
they wear out pretty quickly you guys enjoyed watching the videos I would
appreciate it if you go show some support head over to primum XCOM pick up
a t-shirt a hat stickers I also have the scotch-brite wheels shown in this video
over there as well without your support I wouldn’t be able to make helpful and
informative videos like this now it’s on to getting the right crankcase and inner
clutch cover look it’s sweet too and by the way I’ll have all the supplies used
throughout the video linked down in the description I am pretty happy with how these things
cleaned up now to touch up the gasket surfaces I’ll be using a sanding block
with 320 grit sandpaper just gonna go super light with the pressure don’t want
to take off too much material here like I said I’m gonna go really light with
the pressure and I’m gonna try to keep the sanding block moving around the case
don’t want to spend too much time focused on one spot since that will make
it uneven and then for something like the cylinder base gasket surface I’m
gonna bolt the cases together that way it’s easier to sand and I can get a nice
even finish on the whole surface these gasket surfaces should be plenty flushed
now last thing to do is the clean up all the junk from sanding and what was left
behind the bearings as well I always appreciate y’all taking the
time to watch through the video and don’t forget all the supplies used
throughout the video are linked down below I will see you guys later

100 thoughts on “Tricks To Cleaning Dirt Bike Engine Cases”

  1. Cameron Niemela says:

    Bout time to put this engine together?

  2. GUNNER12R says:

    Dude a parts tumbler would have done that without all the work. The key to being a professional is knowing the best methods to achieve results. Rookies take the hard road

  3. Piecia Te says:

    0:46 these are actually not the Phillips screws, these are JIS, they can be distinguish by a dot indentation on top. Theoretically they require a different screw bit due to difference in design, but Phillips one does also fit. I've heard that Vessel makes quality JIS screwdrivers, so you might want to try them out, since you work with japanese stuff quite often 😉 And of course great work as always, cheers !

  4. Juu5o says:

    Did you use any spray on the cases after polishing them? Does it keep its shine?

  5. marc jennings says:

    Vapour blasting is much more consistent

  6. Harry Benx says:

    excellent job…well done!

  7. dneitzke says:

    Dude, stunning work.. labor intensive to say the least, kinda puts new meaning to perseverance. I was just the luckiest S.O.B lately, i found a 1981 Honda XL 500 S that had been ridden 1 month and was dumped. Only damage was a split front plastic fender ,which has been replaced already. after the mishap the bike was stored for 37+ years . It was tarped and stayed in a heated garage for this near 40 yr. nap. Story is the owner fogged the cylinder, filled the fuel tank with a very rich oil gas mix . and filled the crankcase to the brim with Honda oil ,and isolated and drained the carb and fogged it to with marvel mystery oil. I drained every once of fuel gas ,drained and flushed the crankcase along with the fork oil. new battery, fresh fuel,new NGK spark plug. shot electronic spray cleaner and electronic lube in every electrical connection. Kicked it 3 times and it fired right up and idled like a swiss watch. drove a few miles with no incidence. only issue is that after 37 years the aluminum just on the cylinder head and a few other components (Wheel spokes) have been corroded with surface corrosion, very ugly on a brand new bike. I tried using the mag cleaner you showed but made the aluminum turn a darkish gray. so with a rag and some "BRASSO" seems to help but not getting the results i want. i want this bike "Museum Quality" cuz me will never sell it. The bike doesn't leak a drop of oil even after 500+ miles now, so i do not want to crack any covers on it. Also placed the entire carburetor in a Ultrsonic cleaning machine and it looks pristine now, but the engine wont fit . any suggestions? cuz I'm thinking of painting the cylinder portion black and leaving the outside edge of the fins high polished aluminum with all the other parts hand polished to like a chrome like finish. .

  8. NebukedNezzer says:

    when I bought my honda cb450 in 1966 one of the things I also bought was a impact screw remover. Well worth having.

  9. henri says:

    vapour blasting is the only way to get it look brand new………and fast!

  10. アプリリアアプー says:


  11. PanosHusky says:

    Hey man since we dont have these products here in Europe do you have any product recommendation that i can find here as well? Specially aluminum cleaner

  12. Steve McLean says:

    You're right about the impact screwdrivers being handy but if you don't grind that scary mushroom head off it you'll be picking pieces out of your neck like my friend did. 1/4 inch closer to his jugular and he would have bled out.

  13. Jeremy Huston says:

    You said, "in a few minutes …." haha ya right takes awhile dont it?

  14. RhinoStar0 says:

    You should give soda blasting a try for cleaning.

  15. 74Willy says:

    Great video, Thanks! Not sure if this has been mentioned already but when you run into what appears to be Phillips screws on a Japanese product don't use a Phillips screwdriver because they are not Phillips. They are in fact JIS screws (Japanese Industrial Standard) They have a different form to them than Phillips. While Phillips are designed to cam out JIS is not, but use a Phillips driver on a JIS screw and they they will bugger up the screw. Best way to ID a JIS screw is to look for a dot on the screw head. Although JIS screwdrivers are hard to find the impact drivers usually save the day. Hope this helps those who wonder why Japanese screws always get trashed when removing them with a known good Phillips driver.

  16. Brett Huffine says:

    My OCD always kicks in and i have to smooth out all the casting marks.

  17. 1966johnnywayne says:

    If you're working on a Japanese bike, or anything else from Japan, then the Phillips screws that strip out AREN'T Phillips screws. They are in fact JIS (Japanese Industrial Standard) screws, a Japanese version of the Philips. If you go on Amazon you can get the proper screwdrivers to help avoid cam out.

  18. Rikki lee says:

    i use wizard metal polish w a buffer

  19. Alan Air says:

    Well thats the gonna be the end of watchn this channel if this keeps up, friggn 3 ads i had to watch in this video. Fkn sux

  20. Reno 1960 says:

    Great video. A trick I have always used for blind bearings is put the entire case in the oven. Let it get nice and heated then take it out and slam it down on a piece of plywood. They will fall right out.

  21. 808AdrenalineAddict Hawaii says:

    Do you think I could do this with the fresnel with the motor on the frame

  22. luke the goose waldron restoration hibby says:

    i really find your channel helpfull thanks

  23. luke the goose waldron restoration hibby says:

    i am a really big fan i was wondering if i can have some free stickers i love to havethem on my motocross bike keep up the good work

  24. luke the goose waldron restoration hibby says:

    Any chance of free stickers or Any think would love to have your logo on my mx bike

  25. Les Fox says:

    My question is how long does that finish last in service and what, perhaps, do you do to stop or slow down the oxidising process? Looks good though.

  26. nilo Velez says:

    Hello friend, could you give me the name and brand of the products you use to clean the alumineo pieces? greetings from Ecuador

  27. C Marz says:

    Went that far… you should have gone extreme and anodized the case

  28. Sujit Mohanty says:

    Can you tell us some about socket or tapping for worn-out threads of an engine casing. ?

  29. V says:

    bro this is gold🤯

  30. AcAce427 says:

    Awesome vid! Thank You!

  31. Colton Quintana says:

    When cleaning the cases how long will it take to oxidize again or look ugly ? How do you protect it after taking off the coating ? Please would like to know

  32. YAMAHA88 Kawasaki88 says:

    Freeze it for putting bearings in but can you do the same to get them out?

  33. Khan Cross says:

    is it worth to dremel it all? takes long time but it gets matte after a few laps in sand again

  34. alien from another universe says:

    this is high quality content

  35. crowleymr says:

    Do you use any sort of clear coat after cleaning aluminium parts?id imagine they’d go dull pretty quick.

  36. barry cassaday says:

    What bench grinder is that? Looks nice.

  37. barry cassaday says:

    Oops. Never mind just saw the link. Thank you.

  38. Salif Togola says:

    hello sir, i hope you are doing well i need your address to have product information because i wanted to start my business and i need aluminuim polishing products. I thank you for the good understanding. here is my address: [email protected]

                                                                                    Sincerely, M.Togola salif

  39. harry kanan kiri says:

    Mantab 👍👍

  40. Saviera Shintyara says:

    What the purpose of losing all bearing… if it ain't broke don't mess with it !

  41. MR Entrémattor says:


  42. ochie says:

    bro what chemical can i buy to remove grease and oil in the motor? i'm planning to restore my honda xrm110 and do you have a video how to fix stuckup kickstarter? thanks

  43. Gary Mucher says:

    Another idea for ends and edges and places where gaskets will go, tape down some large pieces of sandpaper on a flat surface and then slide the case over them to keep everything flat and smooth as you sand those edges. It near about eliminates any low or high areas on those surfaces. JMHO

  44. Dylan Gale says:

    Mate I love your content it’s always exciting to watch someone who’s patient with there work im keen to see this cr250 being put back together

  45. Wyatt Baird says:

    Im going to be cleaning an engine soon here. I was messing around with some steel wire cups and they cleaned it up very well, but left a darker finish. You think if i get a bunch of scotch brite wheels for a dremel that will get rid of that finish?

  46. PersianShishaSmoker says:

    top workmanship. What camera do you use Cameron for your vedios?

  47. Edwin motor works says:

    Best vids on youtube

  48. Gary Rodriguez says:

    Dude do NOT use a sanding pad to lap your cases. It's going to be uneven. Get a nice thick piece of glass and cover it with some fine Emery cloth. Lap your gasket surface by sliding it over th Emery cloth in a figure 8 motion.

  49. Kris K says:


  50. Trungnam Nguyen says:

    Do you know that after polishing finished, what need to be done to get the aluminum to get back to its original color?

  51. AlexanderTheGreat says:

    I need one of those

  52. eksine says:

    after you clean it spray 2K clear coat on it (not the stuff in a can, unless it says 2K on it)

  53. danny austin says:

    Quality tools and method! I like it

  54. matt shearer says:

    A clean surface only attracts the dirt.
    Is there any way you are able to try and preserve the finish?


    You mast put some clear coat so that not to be oxidise again from outside.

  56. Wooley689 says:

    Those cases came out great didn't they. The brass wire while softer to use on aluminum, it does however transfer in to the pours of the aluminum leaving a goldish color. The goldish color is fine if that is the look you're after. I had the same thing happen before. Next use some Blue magic to further polish and help seal the cases.

  57. Dave Gouws says:

    Cameron, thank you for putting quality content together in a way that also motivates me to get off my arse and do it!!

  58. AfizzaL Rahman says:

    make batu hejo alus ,

  59. Jesse Wawrzyczek says:

    You went to much with the polishing motocross bikes should look factory.
    Good bling look though!

  60. ad faiz staydark #kphRS148 says:

    Good info…ty

  61. kostas2012 says:

    Polishing the crankcase will increase the engine temperature.

  62. Gupta Kishan says:

    Machine name please bro and size

  63. Jose-Luis Gonzalez says:

    Love your videos been following you for a long time, you should build yourself a vaporblaster, once you have one you can't live without it ! Saves so much time

  64. Under Siege says:

    WOW outstanding workmanship

  65. Power Wagon says:

    Thanks once more. I’m restoring my 426 and just stripped the cases and need to clean them up. Your level of detailing is outstanding! Hope your health is improving.

  66. dan woodrow says:

    save your self a days work and pay for vapour blasting. better result too!

  67. Justin Yates says:

    The dirt bike chrisfix!

  68. Stephen Walsh says:

    How do you keep rust off the bare metal? Worst thing in the world when you get the cases and hardware sparkling but it rusts twice as fast? 👍

  69. Jamil Emambux says:


  70. Theo says:

    Thanks for this, really helped!

  71. montesanot says:

    Thank you for information. Rebuilding a grizzly 700 engine and it's filthy!

  72. auhsoj rekab says:

    Impact screwdrivers saved me more times than i care to admit

  73. Nigel Young says:

    Ouch!!! Brutal. Put in the oven at 150 C and they fall out. Even the blind ones.

  74. Smithereens says:

    Nice job cam, love the patience and detail. I love doing all this myself and your vids help me skip the trial and error drama. I'll be picking some stuff up at your store.

  75. Triple Ace says:

    bro, after assemblying the engine parts again will it effect the engine performance ? Will it have the power and torque that was there when it was manufactured first at the company factory ? And what is name of the brush u used ?

  76. Matt Murtagh says:

    Hey Cameron, do they make a scotchbrite cone or v-shape? That would be awesome for you.

  77. Lewis Cross says:

    What the "Go ahead" count on this video?

  78. Mr.rm250 Rodney Lynn says:

    Mint! 👍 BRAAAAAAAP

  79. حيدر مرتضى says:

    Thank you for translation arabic

  80. Ale Sau says:

    i wanna have sex with this engine 🙂

  81. Travis Derby says:

    Soon as u get it dirty it don’t looks new

  82. Mark says:

    U can make yourself a vapor blaster for about $400,plenty videos on here on how to do it. Made my own and it's whole lot less work

  83. Steven Smith says:

    waist of time

  84. officialGFguitars says:

    Dude… U really had the patience to polish all that… Oh my god!
    I thought u were simply Going to clean and sandblast.

  85. diego adg says:

    hey cameron gracias por ser un maestro de la mecanica y dejarnos ese legado un saludo desde colombia

  86. Bryant Atkeson says:

    Thanks so much this will really help me

  87. Mr TriL says:

    Bullshit . This takes days to polish engine cases . Are you wearing a dust mask for aluminum particles ? Otherwise your a dead man lung wise

  88. David Carmichael says:

    EEEhaa, pretty damn slick.

  89. Nippy Preet says:

    Nonsense, clean with send blaster then nickel it every thing would be better than you… job you are doing is cheap qualty

  90. Figor Rahman says:

    Handsome!!….I mean the engine, not you…sorry..good work buddy, I love ur vid

  91. Jim Madonna says:

    Damn you do nice work.

  92. kevenblingbling says:

    Very good video man helps me a lot on my bike builds!

  93. Monty Crain says:

    You Owe it to Yourself to buy a Foredom Flexible shaft machine.

  94. Best ofthe best says:

    Looks killer. Whats the best way to keep it looking shiney. Have you tried any long lasting wax based product that lasts? Polished over painted any day for me. Nice work man.

  95. Terry Vincent says:

    You are TERRIFIC.
    What TALENT !
    Thank You.

  96. John Wilkinson says:

    @4:08 I don't understand why the nut you put last doesn't come out, aren't you turning it counterclockwise?
    am I missing something here?

  97. Al Dingman says:

    FYI – I just found the best (and easiest) process for cleaning and semi polishing aluminum or pot metal motorcycle cases or engine components. It's called "steam blasting" and it work great!!!!

    This process cut my time detailing a bike engine by at least 60%!!!!! Check it out!!!!!

  98. ESSM says:

    Burger King foot lettuce guy has a dirt bike channel?

  99. scott spencer says:

    Want a better finish? get a harbor freight sandblasting cabinet but use baking soda as the media and it will clean and polish at the same time. You will be amazed at how fast and smooth the alum will be when finished. check into it …some youtube video on this.

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