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Thread: Mugen 360?? The Mystery Is Solved!!!

  1. 02-18-2008, 10:27 PM #1
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    Talking Mugen 360?? The Mystery Is Solved!!!

    What I thought was a 300r kit arrived today and I was comparing it to another practically new one, well I not only discovered that the cyl was NOS like the seller said but also was 80mm and shaped slightly different than the 300 also it doesn't fit all the way down on a bottom end I have down in the basement, I measured how thick the sleeve was and compared it to the new 300r kit its the same but the bore is 4mm's bigger and 2mm's bigger than the FL350 cyl I have I think it's a mugen for the 81-82 250r
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    Last edited by 1upfront; 02-23-2008 at 06:50 PM.
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  2. 02-18-2008, 10:29 PM #2
    evand
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    i dont know anything about s, but i would buy one just to put that top end on!!!


    did you get the piston 2?
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  3. 02-18-2008, 10:30 PM #3
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    More pic's



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  4. 02-18-2008, 10:41 PM #4
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    Quote Originally Posted by evand View Post
    i dont know anything about s, but i would buy one just to put that top end on!!!


    did you get the piston 2?
    No but I found fl 350 pistons up to 82mm's that will work perfect but it came with a 300r head so I think I'll shelf it for a while and look for a matching head.
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  5. 02-18-2008, 10:59 PM #5
    evand
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    yeah with a bore that much bigger you would have head to jug sealing problems, or maybe clearence problems.

    would a dg head work? or maybe get a dg dome re-sized to work with that big of a bore?

    i rlly dont know that is just a cool set up and i want to see it in action lol
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  6. 02-18-2008, 11:04 PM #6
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    I read an article on the mugen 360 kit before. I believe someone here had a link to it.
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  7. 02-18-2008, 11:07 PM #7
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    The only problem is the dg head is for the stock 6 stud cylinder but this and the hondaline 300 kit have 7 stud cylinders.
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  8. 02-18-2008, 11:17 PM #8
    evand
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    ooo i didnt know that. good luck with it man, def. a awsome kit
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  9. 02-18-2008, 11:18 PM #9
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    That head could be reworked to fit. I bet that cylinder would work great with the cases bored.
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  10. 02-18-2008, 11:26 PM #10
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    Yep but it doesn't have the same contour on the fins also it's obvious the cases will need bored i just set it on the motor to show how large the sleeve is.
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  11. 02-18-2008, 11:57 PM #11
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    After checking this cylinder out it is clear that it has never been used. It is also not the same bore size that the mugen 360 is advertised as being. This one is 80 mm. Also the pictures that I have seen of the mugens show them having 6 head studs not seven. The nice thing about this cylinder is that the fl 350 pistons from wiseco will fit it perfectly. I just wonder what it really is and who made it. When I calculated the cc's with the air cooled stroke it comes out to 323 cc. Definately not 360 cc and not 300 cc.
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  12. 02-19-2008, 12:06 AM #12
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    Honda normally calculates CCs by last bore. For example the CR500 is 491cc on stock bore, but at the end of their oversize pistons its right at 500 if I recall. With Wiseco overbore pistons you can get to 513cc. That appears to me to be a 360 cylinder, and you got extremely lucky. I wanna see that sucker run!
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  13. 02-19-2008, 12:22 AM #13
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    Interesting. I bet finding a head won't be easy unless someone here is sitting on one. did you sheach here yet? Doesn't Bigbore have one on his R?

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  14. 02-19-2008, 12:43 AM #14
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    Do you have any heads that share the same stud pattern? If so, just have one re-chambered to fit your needs
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  15. 02-19-2008, 07:59 AM #15
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    SO IT WAS YOU!!!! >:P beat me at auction

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