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Fiero/FieroF2/FieroFx

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  • #4186
    @Vignesh

    Have you measured the weights of fiero crank in comparison with that of the RTR 160 crank?Has anyone tried modifying the fiero crank to make it into a short stroke one? also what are your plans for the drag bike?

    @Max

    What else was changed in the head?

    @Psr

    Any more tech info/links with regard to crank and engine modifications
    Life begins, once you hit the power band !!

    Comment

    • #4187
      Originally posted by gixxer_junkie_m View Post
      @Psr

      Any more tech info/links with regard to crank and engine modifications
      Regarding the difference in crank shaft in Apache 150, RTR 160, and RTR 180 here is an image from the TVS manual........

      When Was The Last Time,You Did Something For The First Time.

      Comment

      • #4188
        Originally posted by gixxer_junkie_m View Post
        @Vignesh

        Have you measured the weights of fiero crank in comparison with that of the RTR 160 crank?Has anyone tried modifying the fiero crank to make it into a short stroke one? also what are your plans for the drag bike?
        The RTR 160 must have a lighter crank for its rev-friendly nature. Engine case has to be modified for making it a short stroke(I guess). Regarding the drag bike, I'm confused between RX135 and Apache. RX is mighty, but the apache is a less expensive choice. However, it will take a few months for me to prepare one.

        Comment

        • #4189
          Re: Fiero/FieroF2/FieroFx

          Originally posted by v1gnesh View Post
          The RTR 160 must have a lighter crank for its rev-friendly nature. Engine case has to be modified for making it a short stroke(I guess). Regarding the drag bike, I'm confused between RX135 and Apache. RX is mighty, but the apache is a less expensive choice. However, it will take a few months for me to prepare one.
          I wish you would choose apache.Spares wont be pain,cheap,most probably better results..and I get to learn more about mods on apache!
          Whatever you do please document every move..so we can study them.
          "Vibes transmitted from crank shaft to frame, then through the bearings of the head stock and into the stem where it meets the triple clamp and into the clip-ons where it is greeted with great pleasure by my hands"-ratfighter mod rtr

          Comment

          • #4190
            Re: Fiero/FieroF2/FieroFx

            Guys, at what rpm does the engine cut-off on a TVS Fiero? I have heard that the Suzi and TVS ones cut-off on different rpms. Anyone know the correct digits or experienced it while ripping on high speeds?
            Ride it like you stole it! But buy your own helmet.

            Comment

            • #4191
              Re: Fiero/FieroF2/FieroFx

              Originally posted by prd8r View Post
              Guys, at what rpm does the engine cut-off on a TVS Fiero? I have heard that the Suzi and TVS ones cut-off on different rpms. Anyone know the correct digits or experienced it while ripping on high speeds?
              I believe you are asking about the RPM limiter!!

              Comment

              • #4192
                Re: Fiero/FieroF2/FieroFx

                Originally posted by v1gnesh View Post
                I believe you are asking about the RPM limiter!!
                You're right, Vignesh. The rev limiter --- It kicks in at diff rpms on the bikes right? U got your bike to cut-off ever? The other day I think I managed to hit my bike's rev limiter. It powered down when I was revving high on the highway. Bike engine cut off and then I coasted to a halt, kicked it after a few secs and flew off again :P I remember that there is a rev limiter that protects from red lining. Wanted to know about the Suzuki make, cause mine's TVS make.
                Ride it like you stole it! But buy your own helmet.

                Comment

                • #4193
                  Re: Fiero/FieroF2/FieroFx

                  Originally posted by prd8r View Post
                  You're right, Vignesh. The rev limiter --- It kicks in at diff rpms on the bikes right? U got your bike to cut-off ever? The other day I think I managed to hit my bike's rev limiter. It powered down when I was revving high on the highway. Bike engine cut off and then I coasted to a halt, kicked it after a few secs and flew off again :P I remember that there is a rev limiter that protects from red lining. Wanted to know about the Suzuki make, cause mine's TVS make.
                  Fiero has very tall gearing(all the 4 gears are geared tall) buddy,so other than the first 3 gears you are never likely to hit the rev-limiter in top.Stock fiero has the rev-limiter cutting in at 9,500 rpm and the bike makes peak power at 7.5k.In your bike's case it makes peak power at 7k.

                  When the rev-limiter cuts in,it feels like missing and engine will not shut down.So from what you've described,it looks like your carb setting is wrong,or in the worst case scenario compression is leaking out at peak load.Which means engine has major problems.
                  Life begins, once you hit the power band !!

                  Comment

                  • #4194
                    Re: Fiero/FieroF2/FieroFx

                    Originally posted by gixxer_junkie_m View Post
                    Fiero has very tall gearing(all the 4 gears are geared tall) buddy,so other than the first 3 gears you are never likely to hit the rev-limiter in top.Stock fiero has the rev-limiter cutting in at 9,500 rpm and the bike makes peak power at 7.5k.In your bike's case it makes peak power at 7k.

                    When the rev-limiter cuts in,it feels like missing and engine will not shut down.So from what you've described,it looks like your carb setting is wrong,or in the worst case scenario compression is leaking out at peak load.Which means engine has major problems.

                    Ah yes. Could be carb setting. Had to take a look at that anyway. Compression leak chances are out cause engine is fine. Nice clarification.
                    Dude, any more pix of your oil cooler? Always good to see them here. Must be a boon in the summer heat.
                    Ride it like you stole it! But buy your own helmet.

                    Comment

                    • #4195
                      Re: Fiero/FieroF2/FieroFx

                      Originally posted by prd8r View Post
                      Ah yes. Could be carb setting. Had to take a look at that anyway. Compression leak chances are out cause engine is fine. Nice clarification.
                      Dude, any more pix of your oil cooler? Always good to see them here. Must be a boon in the summer heat.
                      If carb setting/diaphragm is ok,then i'm afraid your engine's in trouble.Nanotech used to keep on mentioning that his bike begins choking at 8k rpm,because it was hitting the rev-limiter and i had told him repeatedly that it can't be, as it cuts in past 9k.Later it turned out to be a engine issue and we had known it from a while as his oil level used to drop and plug was always oily wet needing replacements.Keeping in mind the optimistic/inaccurate tacho etc,you should not ignore this.First find out whether carb's tuned properly,then take up electrical issue,though it doesn't sound like one and if all these are ok it'd be better to see if engine's drinking oil.

                      Pics of the oil cooler installed properly will be uploaded shortly,as another RTR guy wants to do this mod as well.Yeah buddy,in city's traffic situations and heat of the summer makes it a boon.Though it's not needed actually as even V-twin and supercharged fieros were not needing it.Along with this my bike's also running on Gulf pride 4t plus 20W50,which i must say is as good as semi-synthetics.
                      Life begins, once you hit the power band !!

                      Comment

                      • #4196
                        Re: Fiero/FieroF2/FieroFx

                        Originally posted by gixxer_junkie_m View Post
                        If carb setting/diaphragm is ok,then i'm afraid your engine's in trouble.Nanotech used to keep on mentioning that his bike begins choking at 8k rpm,because it was hitting the rev-limiter and i had told him repeatedly that it can't be, as it cuts in past 9k.Later it turned out to be a engine issue and we had known it from a while as his oil level used to drop and plug was always oily wet needing replacements.Keeping in mind the optimistic/inaccurate tacho etc,you should not ignore this.First find out whether carb's tuned properly,then take up electrical issue,though it doesn't sound like one and if all these are ok it'd be better to see if engine's drinking oil.

                        Pics of the oil cooler installed properly will be uploaded shortly,as another RTR guy wants to do this mod as well.Yeah buddy,in city's traffic situations and heat of the summer makes it a boon.Though it's not needed actually as even V-twin and supercharged fieros were not needing it.Along with this my bike's also running on Gulf pride 4t plus 20W50,which i must say is as good as semi-synthetics.

                        Actually electrical issue is out of the question cause just got wiring checked a few months back and all's fine. Also engine can't be the problem because oil level has been okay with only approx 150 ml less during oil changes which happens in most bikes. But may change piston rings to completely eliminate that in future. Oil used is also good - Motul 20W40 - no doubts there as been using for years with good results. Could be carb issue. I'm having heavy doubts about it as not looked at the tuning for a long time. Will check with mech soon and update here.

                        Waiting for the pix, bud. Good to know another RTR will have that mod too This 20W50 oil sounds good. Even mech was saying he put it in a ZMA and felt it was smoother.
                        Last edited by prd8r; 05-08-2013, 06:44 PM. Reason: edited as it was posted twice...
                        Ride it like you stole it! But buy your own helmet.

                        Comment

                        • #4197
                          Re: Fiero/FieroF2/FieroFx

                          Small update from my side it is been 1000 kms after the cylinder kit change and my bike is doing good very good can feel a pickup of 20% upgrade but the mileage stays there at 38-40 kmpl . changed the oil at 850 kms . Any suggestion for the next oil change what brand and grade ?
                          Never ripped him till now stays below 50-60 kmph limit .

                          Comment

                          • #4198
                            Re: Fiero/FieroF2/FieroFx

                            Originally posted by max007 View Post
                            Small update from my side it is been 1000 kms after the cylinder kit change and my bike is doing good very good can feel a pickup of 20% upgrade but the mileage stays there at 38-40 kmpl . changed the oil at 850 kms . Any suggestion for the next oil change what brand and grade ?
                            Never ripped him till now stays below 50-60 kmph limit .
                            Let the new piston loosen up. It will take time. Has the valves been redone in your fiero? If so, the mechanic would have set the clearance a little higher than optimum. You can go for the next oil change at 2500 kms. Use only mineral oil. Gulf pride 20w50 is the one suggested by an expert. So, stick with it. Run a slightly richer AFR to prevent over heating atleast for the next 1000 kms. Don't worry about mileage, it will come up. But don't expect more than 45. If you get more, then something is not right. Ride a Fiero like a Fiero. Not like discover. One more thing, call your bike as she not he:We are men(if you know what I mean).

                            ----consecutive posts auto-merged-----

                            Originally posted by prd8r View Post
                            You're right, Vignesh. The rev limiter --- It kicks in at diff rpms on the bikes right? U got your bike to cut-off ever? The other day I think I managed to hit my bike's rev limiter. It powered down when I was revving high on the highway. Bike engine cut off and then I coasted to a halt, kicked it after a few secs and flew off again :P I remember that there is a rev limiter that protects from red lining. Wanted to know about the Suzuki make, cause mine's TVS make.
                            It might be piston siezure. Try to recall, how did the engine cut off?? Was it gradual or sudden?? The rev limiter will not halt the engine. It will maintain a certain RPM.

                            Comment

                            • #4199
                              Re: Fiero/FieroF2/FieroFx

                              Originally posted by v1gnesh View Post
                              Let the new piston loosen up. It will take time. Has the valves been redone in your fiero? If so, the mechanic would have set the clearance a little higher than optimum. You can go for the next oil change at 2500 kms. Use only mineral oil. Gulf pride 20w50 is the one suggested by an expert. So, stick with it. Run a slightly richer AFR to prevent over heating atleast for the next 1000 kms. Don't worry about mileage, it will come up. But don't expect more than 45. If you get more, then something is not right. Ride a Fiero like a Fiero. Not like discover. One more thing, call your bike as she not he:We are men(if you know what I mean).
                              Valves has been done . Ride a Fiero like a Fiero. thats is good man!
                              well riding it like splendor for 1000 kms and now you have advised to do it for 1000 kms more, will do it .
                              Then will ride it like a fiero .

                              Comment

                              • #4200
                                Re: Fiero/FieroF2/FieroFx

                                Originally posted by v1gnesh View Post
                                Let the new piston loosen up. It will take time. Has the valves been redone in your fiero? If so, the mechanic would have set the clearance a little higher than optimum. You can go for the next oil change at 2500 kms. Use only mineral oil. Gulf pride 20w50 is the one suggested by an expert. So, stick with it. Run a slightly richer AFR to prevent over heating atleast for the next 1000 kms. Don't worry about mileage, it will come up. But don't expect more than 45. If you get more, then something is not right. Ride a Fiero like a Fiero. Not like discover. One more thing, call your bike as she not he:We are men(if you know what I mean).

                                ----consecutive posts auto-merged-----



                                It might be piston siezure. Try to recall, how did the engine cut off?? Was it gradual or sudden?? The rev limiter will not halt the engine. It will maintain a certain RPM.
                                Piston seizure? No no. It's nothing that serious. Sat with the bike over the weekend as got time off from work. Mech n I both rode it and decided to clean the carb. And problem was solved just like that. Hadn't cleaned the carb for 2 monsoons and a lil dirt in the fuel was playing mischief. Oil level was fine. Usual quantity. Changed it with new anyway. Plug is healthy too. I'm back to no stress riding to office now. I looked at the fuel sediment bowl and lines too and cleaned that as well. Enjoying a good tune now. Bike is humming happily. Thanks for the info
                                Hows your GS? Still in break-in period or ripping period?
                                Ride it like you stole it! But buy your own helmet.

                                Comment

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