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Thread: Water cooling and unlimited carbs for 125s

  1. #46
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    12th February 2004 - 10:29
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    and #6 though that wasn't revved quite as hard as the sidecar. There is a limit though - see avatar.

  2. #47
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    25th March 2004 - 17:22
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    Bugger, missed that op, I should have asked if that one had spun to 14,001.
    Don't you look at my accountant.
    He's the only one I've got.

  3. #48
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    17th February 2008 - 17:10
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    Quote Originally Posted by speedpro View Post
    Dave is right. The Suzuki cranks are crap. Even rebuilding with all new rod and bearings for some reason the big ends don't seem to last, on the TS100/125s anyway. That was only turning them at about 11,000rpm though as the pistons didn't look favourably on going much faster in the TS barrells with the reduced support at the back once all ported. GP motors may be better in that regard. The Honda cranks are definitely best being good for up to 14,000rpm.
    well mine is holding up ok 4 years on now and only a slight crack in the piston
    it's seen 11000+ rpm and 4 2 hour races
    anoher one hase been spun up to 13500 and a micron but ran lean lol
    since then it's done ok and realy pulls like a school boy
    I wonder how different the gp is over the ts ??? the ts is piston port ????

    oh yea the bike hase also had many bad gear changes going down instead of up

    but never rapped a rod around the crank yet !!!!! am more use to the reverse gear change now
    "Instructions are just the manufacturers opinion on how to install it" Tim Taylor of "Tool Time"
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  4. #49
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    4th November 2003 - 13:00
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    Quote Originally Posted by speedpro View Post
    Dave is right. The Suzuki cranks are crap. Even rebuilding with all new rod and bearings for some reason the big ends don't seem to last, on the TS100/125s anyway.
    The dodgy old four strokes seem to last ok though, my GN spent a considerable time with 12000+ showing on the rev counter, it took two season before a valve let go, the crank was still ok
    "If you can make black marks on a straight from the time you turn out of a corner until the braking point of the next turn, then you have enough power."


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    Even BP would shy away from cleaning up a sidecar oil spill.
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  5. #50
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    30th September 2008 - 09:31
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    Thanks for the input. I have looked for rod kits on the net and it looks like Suzuki used the same rod kit for a lot of 100/125's. So it looks like the GP rod kit is no better then the TS/TF's etc., and a bit limited you tell me.

    Now thinking about a RGV (50stroke/56bore) Rod and piston kit, but then it will be a 125 and I will be limited to 24mm carb. I can still bore the 100's 22mm carb to 24 as I have't hacked into yet.

  6. #51
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    A while ago Suzuki superseded all their 100/125 rods to just the one model which happened to be the RM rod. It's a good one as is the silver plated big end bearing they come with. I expect they will be pricey compared to say a Pro-X equivalent.

  7. #52
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    30th September 2008 - 09:31
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    Quote Originally Posted by speedpro View Post
    A while ago Suzuki superseded all their 100/125 rods to just the one model which happened to be the RM rod. It's a good one as is the silver plated big end bearing they come with. I expect they will be pricey compared to say a Pro-X equivalent.

    Thanks for the tip. But RM?? is it ok to use this rod????

  8. #53
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    17th February 2008 - 17:10
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    if it's a replacement for the gp125 then I guess it's a go
    being a road bike spare part and all
    "Instructions are just the manufacturers opinion on how to install it" Tim Taylor of "Tool Time"
    “Saying what we think gives us a wider conversational range than saying what we know.” - Cullen Hightower

  9. #54
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    30th September 2008 - 09:31
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    How come the 4 strokes can rev so high compared to the 2 strokes???

  10. #55
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    Quote Originally Posted by bucketracer View Post
    How come the 4 strokes can rev so high compared to the 2 strokes???
    I'm guessing but it may have something to do with a 4-stroke only having a power cycle every two revs of the crank.
    The Unknown Rider

  11. #56
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    25th March 2004 - 17:22
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    and the word about the Tacho. Often they are so far wrong when they get up in the range as to be laughable. Friend's MB50 that spun up to 17,000, -or so he claimed
    Don't you look at my accountant.
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  12. #57
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    26th July 2005 - 12:12
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    I'll bet your 50 gets around the 12-12.5K range, Dave.
    Certainly sounds like it !!!

    The Loncin engine, when I programme the tacho correctly to read it , revs to around 11,000 before there's no more usable power, although I've seen 12,000 a few times (at Kaitoke, overrev between the short corners).


    "...you meet the weirdest people riding a Guzzi !!..."

  13. #58
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    Yeah but the 50 has a shorter stroke so can put up with more. Even so if you show an RG50 13,000 on a regular basis it will expire in short order. Actually mine revs higher still, but it's still all road parts, just from several different manufacturers.

    If you put your bike on a dyno you will see how optimistic most tachos are. The R6 of last year revved to 17,000. Or 15,500 genuine, so don't automatically assume electronic tacho is correct.
    Don't you look at my accountant.
    He's the only one I've got.

  14. #59
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    17th February 2008 - 17:10
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    what about a Micron 3

    they seem prety good
    all the cart guys use them
    "Instructions are just the manufacturers opinion on how to install it" Tim Taylor of "Tool Time"
    “Saying what we think gives us a wider conversational range than saying what we know.” - Cullen Hightower

  15. #60
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    26th July 2005 - 12:12
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    True about the optimistic tachos, however, I reckon the tuned Loncin would be about right in the reading (well approx).


    "...you meet the weirdest people riding a Guzzi !!..."

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