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Thread: 86 250r head gasket thickness?

  1. 07-06-2005, 07:36 PM #1
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    86 250r head gasket thickness?

    I just bought a moose complete gasket set for my 86 R and it only came with a .010" thick stainless head gasket, is that the correct thickness? It seems way too thin since the one that I took of looks like 3 of these gaskets hooked together.
    http://photos.yahoo.com/dynofox250 (TF 03 pic's)

    Trikes: Restored '86 ATC 250r, original and mint '83 185s

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    Sled: Rev X 800ho mod

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  2. 07-06-2005, 07:59 PM #2
    cr500=3wheeler
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    gasket thickness

    Will increase compression probably similar in thickness to the 3 wheeler gaskets up to you if thats what you want to do. Might make a nice hp increase or might cause the need for high octane fuel.Or might do both. I perfer the thinner gaskets.
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  3. 07-06-2005, 08:15 PM #3
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    I also use the thin gasket with a rechambered and milled head.
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  4. 07-06-2005, 09:15 PM #4
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    Do you guys know what the stock thickness is?
    http://photos.yahoo.com/dynofox250 (TF 03 pic's)

    Trikes: Restored '86 ATC 250r, original and mint '83 185s

    Quad: '86 TRX 250r

    Sled: Rev X 800ho mod

    Bike: '00 ZRX 1100

    TF '03 and '05 Survivor
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  5. 07-06-2005, 11:11 PM #5
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    I believe the stock thickness is .050 of an inch. I would have to go measure one to be sure. If I remember correctly thet have a .010 then a .030 spacer plate then another .010 to total the .050 thickness.The CR250 used the thin head gasket(.010) and is interchangable with the Rs.
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  6. 07-06-2005, 11:16 PM #6
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    Quote Originally Posted by Hornetpowerspor
    I believe the stock thickness is .050 of an inch. I would have to go measure one to be sure. If I remember correctly thet have a .010 then a .030 spacer plate then another .010 to total the .050 thickness.The CR250 used the thin head gasket(.010) and is interchangable with the Rs.

    Going with the 0.010 CR thickness gasket will require me to run more than 94 octane wouldn't it?
    http://photos.yahoo.com/dynofox250 (TF 03 pic's)

    Trikes: Restored '86 ATC 250r, original and mint '83 185s

    Quad: '86 TRX 250r

    Sled: Rev X 800ho mod

    Bike: '00 ZRX 1100

    TF '03 and '05 Survivor
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  7. 07-06-2005, 11:18 PM #7
    cr500=3wheeler
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    possibly!!!
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  8. 07-06-2005, 11:26 PM #8
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    Quote Originally Posted by Dynofox
    Going with the 0.010 CR thickness gasket will require me to run more than 94 octane wouldn't it?
    I have a .010 gasket and I can run premium but it depends on your compression. Once you get it together and broke in do a compression check.
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  9. 07-07-2005, 12:47 AM #9
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    well, i use a milled head and the cr head gasket and its doing good, no leaks....i know that the cr is the thinnest, the atc is medium and the trx is the thickest....you can get any of them through nac's online store in the "honda" section....i recommend getting their clutch update kit too...its comprehensive...
    1985 Honda ATC250R drag trike with s/t kit and full drag CR hybrid motor and drag chassis...
    1986 Honda ATC250R daily rider fully modded engine, +4 swinger,etc...
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  10. 07-07-2005, 03:39 AM #10
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    whats the best year of cr to use??
    1986 ATC 250R
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  11. 07-07-2005, 10:57 AM #11
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    I had the 3 peice head gasket also. I ground the rivets away and just used one thin peice and no spacer, I'm guessing it's .010. I run 93 octane with no detonation. I say use it.
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  12. 07-07-2005, 01:20 PM #12
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    Quote Originally Posted by Blown 331
    I had the 3 peice head gasket also. I ground the rivets away and just used one thin peice and no spacer, I'm guessing it's .010. I run 93 octane with no detonation. I say use it.

    Thats what I wanted to hear! When you split your 3-piece head gasket you used one of the 2 thin outer layers? If so that is the thickness I have.
    http://photos.yahoo.com/dynofox250 (TF 03 pic's)

    Trikes: Restored '86 ATC 250r, original and mint '83 185s

    Quad: '86 TRX 250r

    Sled: Rev X 800ho mod

    Bike: '00 ZRX 1100

    TF '03 and '05 Survivor
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  13. 07-07-2005, 01:32 PM #13
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    Yep, that's what I did. No detonation. Runs really good.
    08 Outlaw 525s
    07 CRF70
    04 Harley FLHRCI
    04 TRX90
    03 XR650R
    03 400EX- XR650R engine
    02 XR100R
    01 Banshee
    00 XR50R
    00 XR70R
    99 PW50
    99 JR50
    96,95 Sportsman 400
    95 Xplorer 400
    94 Indy XLT
    87 Trail Boss
    86,86,86,86,86 Scrambler
    86 TRX70 x2
    85 ATC350X
    85,84 ATC250R
    85 Red Tecate
    85 LT50 x2
    84 XR500R
    84,84,84,84,83,82,80,79 ATC70
    82,79 XL500R
    83 ALT50
    79,78,77,77,76 XT/TT500
    76,75,74 XL70
    72,71,71,71 SL70
    72 Harley FX
    72,71,70,70,70,70,70 CT70H
    72 SL100
    70,69 Z50
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