Rock Solid Engines laser-cut inlet gasket

Discussion in '2-Stroke Engines' started by AussieSteve, Dec 21, 2009.

  1. AussieSteve

    AussieSteve Active Member

    I almost posted in General Discussion, but since this relates only to HappyTime engines.....
    I bought a laser-cut inlet gasket from Rock Solid Engines a couple of weeks ago. Not only did it swell beyond recognition and sort of melt, but it looks like heaps of small pieces have gone through my engine, or, at least, into it.
    Has anyone else bought these?
    (I have two more new ones, one's soaking in my fuel-oil premix to see what happens.
    Just checked - already after 20 minutes it's really pliable and slimy on the surface.)
    ... Steve

    Check this out:-


    N.B. Note the very thin gap between port and stud on the 'before' shot, then how much it swelled in the 'after' shot. (Candidate for Jenny Craig?)

    Attached Files:

    Last edited: Dec 21, 2009

  2. Al.Fisherman

    Al.Fisherman Active Member

    Steve..Never used them, looks like I won't. As far as material between the port and stud wouldn't make any difference if there was none at all. I have had issues with aftermarket head gaskets, where the gasket trashed both a piston and cylinder.
  3. AussieSteve

    AussieSteve Active Member

    Hi Al. I'll have to watch that. I'll stick to stock head gaskets.

    The RSE gasket that I soaked in fuel overnight didn't exactly swell, but after 15 hours it has the consistency of modelling clay. When they're bolted on and fuel-soaked, the gasket oozes out in all directions.
    I only bought these through laziness to avoid hand-cutting gaskets. Bought some 0.8mm oil jointing paper and a hobbyist scalpel set yesterday - no more bought inlet gaskets for me.
    At least I can use the remaining RSE gasket as a template for cutting my own.
    I'm still not too sure if I should remove the head and barrel and flush the crankcase out with fuel, to remove the gasket remains, or just risk it.
    I'll speak to Tony at RSE about these gaskets, but first I'm waiting for the last order to be fixed. I got a new carby with no needle or top cap. He promised to 'Platinum Express' them to me, (overnight delivery), a couple of days ago. Still no show.
    I'll be writing a Rock Solid Engines review in a few days, when all this stuff is sorted. I don't think it'll be a very good review.

    ... Steve
    Last edited: Dec 22, 2009
  4. Bobbyoutback

    Bobbyoutback Member

    Howdy Steve ,
    What a nightmare that gasket material is , bet the Chinaman who made up that batch forgot to add an ingredient or was trained up in the infamous Chinese quality control skills . :goofy:

    Don't be to hard on Tony ( RSE ) just let him know whats happened , bet he goes out of is way to rectify it .
    Most courier companies are run of their feet with the postal strike at present .

    Bobby .
  5. AussieSteve

    AussieSteve Active Member

    G'day Bobby, it might be a bad batch but it might be all of them, too. I'd love to hear from others who've bought them in the past.
    If they're usually OK, well, they are nicely (laser-)cut to match the port and $3 isn't bad.

    I'm not aiming to be too hard on Tony at all, just an accurate description of my recent dealings, with pros and cons. First the billet head, then the billet inlet, then these gaskets. The carb top and needle aren't really a worry, I know they'll get here.

    give me vtec, the stock studs are too short for the billet head and no-one sells longer ones.
    The thread is 8mm x 1.0mm, not the usual 8mm x 1.25mm of std. threaded rod. Jim and Paul at Sick Bike Parts are helping me out with custom studs, but Tony provided no support and left me posted. In his last email, he suggested that I simply get the head machined to fit. It should be made to fit, not too thick for the studs. If longer studs are required, he should perhaps stock them.
    His last email:-

    ... Steve
    Last edited: Dec 22, 2009
  6. give me vtec

    give me vtec Active Member

    what happened w/the billet head???? I was thinking of buying one... how did it perform... have you had problems with it???
  7. AussieSteve

    AussieSteve Active Member

    Sorry Ron, just picked it up. So it's Alabama Fisherman and not Al Fisherman.

    ... Steve
  8. arceeguy

    arceeguy Active Member

    Well, if "Tony" wasn't selling laser cut cow manure, there wouldn't be a problem now would there? lol What a rip off.

    And people make fun of the stock parts...........
  9. Bobbyoutback

    Bobbyoutback Member

    Sheeze Steve ! I now see your point , all this should have been sorted out before before that billet head was ever offered for-sale .
    I would be not happy :veryangry:

    Cheers Bobby .
  10. Al.Fisherman

    Al.Fisherman Active Member

    Yup I'm a Alabama Fisherman...boat below....The house is "For Sale" The one on the water is what the Mississippi River flow looks like meeting the Gulf of's called a rip.
    Steve..No problem, I'd think the same. I modified my signature to clear things up, not that it was a problem. Pictures are of my head gasket problem. I running the "80"cc engine 47mm bore, and not the 49cc with a 40mm bore.

    1. Damaged gasket..arrows show chewed up edges from piston
    2. New stock gasket over damaged gasket
    5. Used gasket over damaged gasket
    You can see that the damaged gasket was cut slightly with a smaller bore. The piston (domed) came up and tried to go through the gasket, thus shredding the aftermarket.

    Word to the wise...check diameter of ANY new gasket when installing on a engine with a domed piston.

    Attached Files:

    Last edited: Dec 22, 2009
  11. AussieSteve

    AussieSteve Active Member

    Love the boat. We have a couple of similar rips here, but not as large or well-defined.

    Wow, I've now fitted 2 new gaskets without a thought. Not any more.
    I've got 2 more new ones here - I'll check them out. When the billet head goes back on, there isn't much room for pieces of head gasket in there.

    ... Steve
  12. AussieSteve

    AussieSteve Active Member

    Yeah, mate, you're getting the picture, but there's more. The inlet tube is yet another story. Thinking about it, I should have posted this in 'Parts and Accessories', but I'll probably start a thread on the inlet tube there, when I get a chance.
    It seems to me that the RSE billet stuff almost fits these engines. If the heads were machined especially for this purpose, wouldn't the stock stud length have been taken into account? He suggested that I machine the head down at the studs and made no offers to do it himself, even for a fee. (Me and my hand electric drill?)
    And the inlet is straight and 1 1/2" long, so the carb interferes with the clutch cable and sits at a 25-30 degree angle, also requires stud removal for allen-head screws. And buying allen-head screws.
    Apparently if you buy a complete RSE engine these issues are already addressed, but as performance parts.....

    ... Steve
    Last edited: Dec 22, 2009
  13. Al.Fisherman

    Al.Fisherman Active Member

    Steve..even after my/your PM's, are you still having issues with the stud lengths? Also look at this, the piston won't fit through a new aftermarket gasket I bought.
    Second..Stock gasket

    Attached Files:

    Last edited: Dec 22, 2009
  14. AussieSteve

    AussieSteve Active Member

    Unreal. I'll definitely check my spares, when the head is off next.

    No problems, the studs are coming. Jim went to pick them up on Saturday and the shop was closed. He was trying again Monday. (Hope they're not closed for Xmas)

  15. Bobbyoutback

    Bobbyoutback Member

    Hey Steve , I just had a look at that inlet manifold for the billet head , no way that will fit on a stock engine as you said .
    And as for the stud lengths being to short " stuff me " maybe hes got a expert from China working for him on quality control now ? :jester:

    He say you drill out some metal so can see stud , then hammer on nut ~ " Ahr - So " fixem goood like back when work for master Po :ack2: :ack2:
  16. XenonDream

    XenonDream Member

    Egh. After reading this, it looks like I'll just be leaving my bike stock forever.
  17. AussieSteve

    AussieSteve Active Member

    XenonDream, don't be put off all non-stock parts. There's some very good stuff about. SBP etc.

    For other's benefit, just snapped some pics for the coming 'RSE Billet Inlet' thread.

    ... Steve

    I'll post them here, then link in the other thread.:-
    (I've removed the 'o' ring, for use on my modified alloy inlet.)


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    Last edited: Dec 22, 2009
  18. Ghost0

    Ghost0 Guest

    Got your stud material. I will try and get them cut and hopefully get them shipped off tomorrow. How long did you want them?

    Just want to note about Al.Fisherman's head gasket. It was a SBP head gasket that he had issues with. We are all about pushing the envelope and improving performance. Our gaskets are thinner and tighter in an effort to raise the compression to improve performance. We also did a little trick on the gasket and made the center hole slightly off set of the stud holes. We have found that the variations in the studs and sloppy fit of the cylinder causes most gaskets not to center on the cylinder hole. This offset allows the customer to rotate it to fit centered on the cylinder hole. Note in his photo that the piston only made contact on one side. The problem is we did not post any instructions on this or to double check fit prior to assembly. This is completely our fault. We have since slightly enlarged the cylinder hole on our gaskets to ensure this will not happen in the future. We will also do an installation instruction to assist in assembly.
  19. AussieSteve

    AussieSteve Active Member

    Hi Jim. 2 sets x 112mm, please.
    It's not super-urgent and it is Christmas, so take your time.

    In Al.Fisherman's pic, I thought it looked off-centre. A bit of lateral thinking.

    ... Steve
  20. Pablo

    Pablo Motored Bikes Sponsor

    112mm? That seems kinda short? I was thinking 120mm min.

    The other thing that Jim didn't mention - not all engines have the exact bore (imagine that?!). We thought we had accommodated all 67cc (80) engines....and to be honest Al.Fisherman is the only customer that ever had a problem and we have sold 300+ HG's.

    PS: We are in no way associated with the funky intake gaskets. Just wanted to be clear on that! (yikes)