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  1. Replies
    850
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    170,186

    Re: The 650sx Brotherhood

    Depends on what mods you have, mine has a few things and it gets pretty hot too. How hot does yours get? If you splash it with water does it boil off? Can you touch the head with your hand? Try...
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    1,504

    Re: 650sx best mods for low end

    I tried putting on the manifold from a ts that I had laying around. Didn’t do too much but thanks for the suggestion. Next thing I’ll do over the winter is dry pipe
  3. Replies
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    1,504

    Re: 650sx best mods for low end

    I have a feeler guage. It is indeed a 15 pitch prop. I concluded that the engine is not getting too hot, 2 pumps and 3 impellers and yielded to the same results. I’m thinking that it just looks like...
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    1,504

    Re: 650sx best mods for low end

    I believe I silicones the pump in correctly, I used a 15 pitch and believe it’s a skat trac, it was pretty chewed up and had to fix it. I tried putting in another pump from a ts and ran it in the...
  5. Re: 1989 650SX no water coming out of pisser…

    Did you ever fix it? Mine does the same thing but a little worse. Doesnt come out at all at idle and at anything above an idle really it just trickles out.
  6. Replies
    29
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    1,504

    Re: 650sx best mods for low end

    I just test rode a new impeller that I had laying around, had good high end but poor low end and almost seemed like it was cavitation. I have a guesstimate of the prop pitch but it’s the stock style...
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    1,504

    Re: 650sx best mods for low end

    didnt see this until now, it has a west coast high compression head and ~180 psi
  8. Replies
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    1,504

    Re: 650sx best mods for low end

    Also, it seems like I’m not getting enough water through the system. The water just kind of lightly sprays out and doesn’t really have any water coming out of the pisser at idle. Do you have any...
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    29
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    1,504

    650sx best mods for low end

    I have an 89 650sx that I just got running good and want to get some nice low end power and acceleration. I already have a intake grate and a high compression head, and I don’t know what should be on...
  10. Replies
    2
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    539

    Re: Kawi 650 or 750

    You can buy a TS650 for $400, and drop the engine from that in. The only differences are, the throttle cable if you decide to keep the carb. And the electrical box from that won’t fit in the 650sx
  11. Replies
    13
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    1,167

    Re: 650sx uneven cylinder burn (single carb)

    I just completed my fix, major problem was the coil. I slapped a new one in and it went good. I also checked out my exhaust system and the 32 year old tubing was in really bad shape. The one piece...
  12. Replies
    13
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    1,167

    Re: 650sx uneven cylinder burn (single carb)

    I doubt this is your problem but I half fixed mine, both plugs look just fine. There was a big rip on one of the fuel lines coming off the reserve/on switch. Must have happened from removing and...
  13. Replies
    13
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    1,167

    Re: 650sx uneven cylinder burn (single carb)

    Mine seems to have weak spark, just found that out today, I would try looking into that. I have a thing on the way to test it.
  14. Replies
    13
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    1,167

    Re: 650sx uneven cylinder burn (single carb)

    Did you ever fix the problem? My ski is having the same problem and I checked everything that you said that you did.
  15. Replies
    1
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    526

    650SX fuel system

    I got a 1989 650sx and it bogs at anything above half throttle and maintains the half throttle speed/slows down. I believe the fuel pump is bad since the return line has very little fuel pressure but...
  16. Replies
    5
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    727

    Re: 650sx popup pressure

    The carb is the stock keihin, thanks for your input.
  17. Replies
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    727

    Re: 650sx popup pressure

    Doesn’t want to climb up in rpm’s. Checked for exhaust leak and didn’t see anything. It seems to run the same with and without the hood on it on the trailer. It’s pretty rough on the trailer. Even on...
  18. Replies
    5
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    727

    650sx popup pressure

    Recently got a 1989 650sx and took it out on the water and it wouldn’t really want to get up on a plane, measured the popup pressure and it was close to 40 psi. Do you think this would lead to not...
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