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  • #31
    Originally posted by Tom68 View Post
    Was gunna post earlier about being careful with fork oil weight. The forks probably don't have any type of blow off valve and if they don't by the time you get enough comp' damping feel with heavier oil they'll lock on high speed movements, hadn't considered the rebound.

    Same problem for pre '85 competitors, common fix is drill out damper rods and fit gold valves.
    Yeah, I was thinking about drilling the rods out, there are 4 holes from memory.
    2018 Beta 300RR Racing

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    • #32
      L is a japanese domestic model actually sold as the xr230 so adr is easy.

      F is a brasil made crf, not factory set up for rego anywhere.
      Dennis

      I treat my body like a temple..........my only downfall is that I worship Bundy Rum

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      • #33
        Originally posted by Dennis View Post
        L is a Japanese domestic model actually sold as the xr230 so adr is easy.

        F is a brasil made crf, not factory set up for rego anywhere.
        Thanks Dennis
        Ride by Stealth
        Noise Sux

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        • #34
          Crf230 user reviews/modifications

          07 model crf 230

          The changes from what it was were a larger MJ at 120 from a 102, clip dropped one position from the middle on the stock needle and pilot left alone at 42.5 even though a 45 was suggested.
          Air screw untouched at i think 1 3/4 turns out, is a major bitch to try and set with a hot running motor anyhow...may have to hunt down one of those longer ones that i will link to later.
          Baffle was drilled with 3x 10mm holes, one on the inside end cap and 2 on the sides of it, airbox was already de snorkeled.
          Changes were made following the sourcing of info on the net including but not limited to this site:
          http://www.rickramsey.net/CRF230Fdiy.htm

          So... bottom end i cant say i felt any difference and i wasn't really expecting any there anyhow.
          Midrange however was much stronger and almost felt like something that even i could be happy with....ok maybe not but i'm sure it will be enough for the missus now anyhow.
          Top end...no good it wouldn't pull with the bigger MJ, i will be trying a 115 next then a 110 if it is still too much.
          Obviously i will add more to this as time goes by and more tuning is done.
          Eat sleep ride repeat.

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          • #35
            what sorta needle do you have ? rr's site says the 06+ needle only has two clip positions and that you need the 05 needle ? I haven't pulled it out yet

            CRF230F Forks 101 Link ->

            http://www.thumpertalk.com/forum/arc.../t-244653.html

            Jetting experts on TT are pushing this as the best solution - but main sounds big >

            Main: #120 99113-GHB-1200
            Pilot: #45 99103-MT2-0450
            Needle Set: 05 Needle 16012-KPS-901 (clip in 4th position).

            I'm going to modify the baffle instead of removing it as well... will report back on the results. But I think the bike is plenty fast as it. The forks and tyres are my main problem at the moment

            Airbox baffle didn't look alot smaller than the stock 250x one ? and I thought it made pretty good power with it in, so not sure I will touch that either.

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            • #36
              I believe there is some differences in what they yanks got and what we have here.
              I'm leaning to thinking that we are still getting the pre 05 spec setups as my 2 [05 and 07] are identical in their jetting.
              That is what started me on all of this in the first place, i rode the 2 of them back to back at Wooragee not long ago and the 05 had far more grunt than the newer one so i pulled the carbs apart to check specs and they were identical bar 1mm difference on float level.
              Valve clearances and everything else i can see are the same.
              Looking for an answer i came across that page above and others that made me decide to stuff around with the jetting to see what happens.

              Oh, both needles on the bikes are 5 position jobs, not 2, but i'm pretty sure they are unmarked as to what model they are?.
              Edit, disregard the unmarked comment, i wrote the numbers down they are in the shed will look later..goldfish and all that

              Editx2: Disco, when you go to check/change the needle, don't do it as that link says to ie: don't fk around with pulling the clip off the link arm, just go straight to undoing the 2x phillips heads that hold the link assembly inside the slide barrel. It may be a bit more finicky getting the screws back in with the full link attached but it's one less step and it's less [tiny] parts removed to be flicking off into the ether under your bench.
              Make sure either way you do it that the spring in there that sits over the end of the needle is actually sitting where it is supposed to be once the screws are back in, you will see what i mean when you get in there if you don't already.
              Eat sleep ride repeat.

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              • #37
                Awesome thanks for the tip, I'll give it a crack soon.

                Today I put the 5/8" spacers into the forks, put some thicker oil in and set it to 5.5" from the top (after factoring in the spacers).. which was about 300ml. Can't wait to see what it's like ... I put an MT43 on the back which will add a bit more suspension to it!

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                • #38
                  Don't you like my threads Riderbeaforgetfulloldman?

                  http://www.dirtbikeworld.net/forum/s...t=crf+230+mods
                  2018 Beta 300RR Racing

                  Comment


                  • #39
                    Umm....oops
                    We'll go with yours, I'll get a mod to delete this one.
                    Eat sleep ride repeat.

                    Comment


                    • #40
                      07 model crf 230
                      Review of some jetting changes made to a crf with snorkel removed and 3x 10mm holes in baffle.

                      The changes from what it was were a larger MJ at 120 from a 102, clip dropped one position from the middle on the stock needle and pilot left alone at 42.5 even though a 45 was suggested.
                      Air screw untouched at i think 1 3/4 turns out, is a major bitch to try and set with a hot running motor anyhow...may have to hunt down one of those longer ones that i may link to later.
                      Baffle was drilled with 3x 10mm holes, one on the inside end cap and 2 on the sides of it, airbox was already de snorkeled.
                      Changes were made following the sourcing of info on the net including but not limited to this site:
                      http://www.rickramsey.net/CRF230Fdiy.htm

                      So... bottom end i cant say i felt any difference and i wasn't really expecting any there anyhow.
                      Midrange however was much stronger and almost felt like something that even i could be happy with....ok maybe not but i'm sure it will be enough for the missus now anyhow.
                      Top end...no good it wouldn't pull with the bigger MJ, i will be trying a 115 next then a 110 if it is still too much.
                      Last edited by rideo; 07-09-2010, 05:03 PM. Reason: forgot to remove all the non applicable crap at the top...
                      Eat sleep ride repeat.

                      Comment


                      • #41
                        Originally posted by RED1 View Post
                        Xr600 shock fits straight in, the front end can be changed but you need a spacer for the headstem as it is shorter than CR/XR. if you pull out the Airbox snorkel you will need to go up on the main jet, don't worry about the needle as its a waste of $30, just adjust the one in it if you need to.

                        Luv em, bloody great bike to muck around on with heaps of grunt, I want to build a special when I get some time.
                        What does the XR6 shock need ? spacer to shorten it and a softer spring ?

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                        • #42
                          XR600 shock is the same length, the top mount is a different thickness depending on the model and the pre 91 have a thin top mount and remote reservoir, I think the delta link on the 230 can take a stiff spring but I used a fournales air shock that was made for an XR600.

                          As far as jetting goes, all the USA guys ala ramsey are riding at 2500m so I would not be following their instructions.
                          4-strokes have one real advantage over 2-strokes. Like the "big bang" theory in street bikes, the firing cycles are spaced longer, letting the tire hook up better on loose ground. And I'm sorry if I have hurt any 2-strokes feelings, but what do I care?

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                          • #43
                            so what are you saying redbits? the pre-91 is the go ?

                            Comment


                            • #44
                              Yes, because you need to mount a remote reservoir as the piggy back style is no good, I think you may need some small spacers for the top mount, can't remember as it was about 6 years ago I played with one.



                              4-strokes have one real advantage over 2-strokes. Like the "big bang" theory in street bikes, the firing cycles are spaced longer, letting the tire hook up better on loose ground. And I'm sorry if I have hurt any 2-strokes feelings, but what do I care?

                              Comment


                              • #45
                                Just finished some more playing around with the jetting, i is here to report that the 115 MJ goes a lot harder than the 120 which with hindsight was obviously way too much with only a few holes drilled in the baffle.
                                Midrange has improved even more and i really think now if i had to i could live with it...lucky i don't though.
                                I will keep going down in sizes until i feel i'm not gaining anymore, there is more to get as it used to rev harder with the 102 main [9770 rpm compared to now at 9000 rpm].
                                Using my own head to work shit out instead of going by what some nuffy on the net wrote i reckon seeing as i have only really given it another 10mm x 3 holes, presuming it was a bit lean as it was before i started fkn with it, then a 110 could still be large, maybe a 107.5 will be the right one in the end?

                                Changing the MJ is a pita btw, i suggest removing the heat shield from the exhaust to give you some more fingertip room. [i did it on the bike, no carb removal]

                                Summary at this stage, midrange is almost awesome, it is compared to what it was like anyhow.

                                Needle is a 039A btw Disco fyi.


                                I'm not sure about doing the 14 tooth on the front...but i will anyhow seeing as it's cheap and i can use the sprocket on my 270 if i choose to. [got a heap of 13's and 12's hey...but no 14^frt ]
                                Eat sleep ride repeat.

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