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Thread: CR500 compression release

  1. 06-23-2005, 01:36 PM #1
    86250RZ's Avatar
    86250RZ
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    CR500 compression release

    Does any one know if these actually work as good as advertised (link below)
    I have a 250R full rolling chassis and would like to build a 500R. I know they can be a b%^*h to start and I would rather it be fairly easy on my foot.

    http://cgi.ebay.com/ebaymotors/ws/eB...category=10066
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  2. 06-23-2005, 01:54 PM #2
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    With the way thats bolted in there, you would think it wouls snag a ring.... I mean how its not smooth with the bore.
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  3. 06-23-2005, 02:06 PM #3
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    im sure that if you designed it all your local machine shop would be able to help you out and the would make it shaped to the bore as honda trikes rule said, i dont think rings snagging would be a problem unless you put the gap there. the hard thing to get the machine shop to make would be the valve to stop it realeasing compression the whole time.

    will
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  4. 06-23-2005, 02:40 PM #4
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    Looks like it would work to me. There would be no problem with the rings, it would be just like every other port in the sleeve. As long as you chamfer it, then it will be fine.
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  5. 06-23-2005, 02:47 PM #5
    chris200x
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    well, the way I see it is if your too wimpy to kick it over to start the thing... You have no business riding it.
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  6. 06-23-2005, 03:06 PM #6
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    Does it come with the lever, cable and what ever else it needs?
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  7. 06-23-2005, 03:21 PM #7
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    Quote Originally Posted by chrisr200x
    well, the way I see it is if your too wimpy to kick it over to start the thing... You have no business riding it.
    I can tell from that comment that you have never tried to kick over a hi compression (i.e. shaved head) 500cc 2 stroke. Im a solid 5' 9" 200 pounds and it can be very painful to you foot after 3 or four kicks( I have actually worn holes in the soles of my shoes from kicking over a hi. comp 500 dirt bike). I do not wear riding boots which im sure would help. I havent found any wide enough for my feet, nothing but dress shoes or tennis shoes for me.
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  8. 06-23-2005, 03:39 PM #8
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    Consider welding a plate on that kicker somehow to make more surface area on your foot... don't sound like a whole lot of fun !!!
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  9. 06-23-2005, 04:08 PM #9
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    Believe me...some of these guys have no idea. I just bought a KTM 550cc two stoke and its a monster.

    I am 200 pounds and I have to stand on a crate, with heavy boots, find TDC exactly and then sometimes I can start it.

    Its just a whole other world....unreal!!
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  10. 06-23-2005, 04:41 PM #10
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    I'm probably going to install one of those kits on my 500 very soon. Since it's real close to me, i'm going to take my cylinder to them personally, so I can see a finished one. They do all the work and furnish the parts for $200. That's less than the cost of a broken foot!

    My bike isn't really too bad to start, but it would still get old after riding it for an hour or so. I think the worst part is that it only makes one revolution when you kick it, where-as a 250cc seems to make two or three.
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  11. 06-23-2005, 04:46 PM #11
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    those 500's should come with electric start.

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  12. 06-23-2005, 05:05 PM #12
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    [QUOTE]
    Quote Originally Posted by Derrick Adams
    I'm probably going to install one of those kits on my 500 very soon. Since it's real close to me, i'm going to take my cylinder to them personally, so I can see a finished one. They do all the work and furnish the parts for $200. That's less than the cost of a broken foot!

    Let me know how it turns out after you get it done, I would like your opinion on the difference before and after. I am going to do this (500R conversion) regardless but I would really like to have the compression release installed if it makes a big difference.
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    82Honda250R
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    Tiger 80 (need engine) Sold
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  13. 06-23-2005, 05:56 PM #13
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    Yeah me too Derrick, as everyone who seen me trying to crank mine at TF knows its a beast and a half to get it turned over and going. And its even stock compression! Leme know how it turns out and works.
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  14. 06-23-2005, 06:19 PM #14
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    hrc85250r
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    yeah, i had a 85' cr500 a couple years ago and it was ported for hillshooting (aka-they didnt know what they were doing) and it was a ******* to start....almost impossible...we sold it for a grand.
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  15. 06-23-2005, 06:25 PM #15
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    Believe me...some of these guys have no idea. I just bought a KTM 550cc two stoke and its a monster.

    I am 200 pounds and I have to stand on a crate, with heavy boots, find TDC exactly and then sometimes I can start it.

    Its just a whole other world....unreal!!
    Man, I bet that baby hauls *****
    86Honda250R
    85Honda250R Sold
    82Honda250R
    Tiger 200 198? Sold
    Tiger 250 198?
    Tiger 80 (need engine) Sold
    85 Tri-Z
    86 Tecate


    Perfection consists not in doing extraordinary things, but in doing ordinary things extraordinarily well.
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