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Got my GSR40!!! New to air tire pends and have a few questions

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  • Got my GSR40!!! New to air tire pends and have a few questions

    Hello everyone!

    Thanks to this forum and youtube, I have been wanting a GSR40 for some time and pulled the trigger on one today! The thing is.. I've only worked on hard tire sports but feel confident with the maintenance, even successfully completing a top end rebuild... but I'm lost looking at this thing. I've been reading almost all the posts about the GSR40 on this forum, and was wondering if you guys could tell me what exactly it is that i received, and if there is anything that you think requires my attention. I have some things I will keep an eye out for, such as making sure the sprocket is aligned with the drive sprocket, chain maintenance etc.

    Upgrades I see:
    Juice Box
    Racing pole (brand type?)
    air filter
    E2 Pipe

    Things I plan on replacing:
    Fuel lines (current ones leak)
    air filter (mainly for looks)
    Chain (the one on there is very loose and they're cheap)
    Sprockets? (need to count the teeth to see if I will change the gearing, otherwise they are fine)
    Tires (could probably wait a bit)

    Questions:
    Is this the stock carb?
    Would I be able to add a silencer to the pipe?
    Whats so special about the ADA chain tensioner and do I need one?
    How do you decide what length chain you need after you choose your gearing?
    Any clutch maintenance required?
    Any other tips and tricks?


    Thanks everyone and sorry for the newb questions... You have all been very helpful thus far!

    FullSizeRender 2.jpgFullSizeRender 3.jpgFullSizeRender 4.jpgIMG_0149.JPGIMG_0150.jpgIMG_0151.JPGIMG_0152.JPGIMG_0163.JPG

  • #2
    Excellent score!

    MLC race pole, solid and worth holding on to. Old skool, not made anymore, she will shine right up.
    Air filter is less than desirable, but fine on your G43. If you want a change, go 3" UNI or K&N.
    The E2 is a good pipe, many folks seem to love them on their 40.

    You are on the right track in terms of maintenance and replacement parts thus far. But hold that thought......

    Carb looks to be stock, we need the numbers off the side for confirmation. "33" - "58" - "167" etc..
    Yes you can add the silencer, BobDudeGuyMan has one for sale right now.
    Some guys here will argue that a tensioner is not necessary, and I get where thay are coming from. Me, I prefer to use them.
    Buy a chain breaker amd get 4 feet of chain, two feet for the ped and two feet for reserve. Thank me later. 😎
    Clutch maintenance on a G43 means inspecting it when you have the engine off, and thats about it. They last awhile, great clutch for that engine.

    Lots of tips and tricks, we will guide you along as they arise.

    I suggest some Skopod adapters and some aftermarket brakes. Personally, I am not fond of Mad Dogs at all.

    I highly recommend to tear it down completely and inspect everything in its entirety. Not necessarily the engine, but that would not hurt either. After a complete tear down and inspection, this gives you a great idea of the condition and helps make sure everything is tip top. Also helps you find things before they fail, and help with your parts order.

    We are happy to help where we can. So if you get stuck, just ask. 🤘
    Hell Fab

    Comment


    • #3
      That's a great scooter, and yours is already set up for Mad Dog or IS brakes. Keep that frame and, like DOH said, KEEP THAT RACE POLE.
      Carb isn't stock. It's an ADA HP carb (Walbro WYK series). Air filter looks like an old ADA filter (more pleats, won't spin). It's dirty, damaged, but might clean up well.
      Buy a complete gasket set for the engine.

      DOH gave solid advice for everything else, so I don't need to repeat him.
      MB Products | Coast Ped Crew
      instagram.com/mb_products
      facebook.com/mbengineered

      Comment


      • #4
        MB and DoH covered most of it. Id listen to those guys.

        Great find on the 40. You actually picked up a really sick scoot since it had MD brakes, MLC pole and the E2 pipe.

        I would recommend the ADA chain tensioner. It is nice because it is spring loaded so it doesnt need to be adjusted as often as the stock tensioner. Also because it is spring loaded, it does a better job of compensating for tight and loose spots in the drivetrain. Definitely a worthwhile upgrade.

        Personally, your scoot looks great to me and other than the ADA chain tensioner, I probably would just run it the way it is.

        40s are great.
        Instagram: @base_cat

        Comment


        • #5
          Yeah that mlc pole is awesome, I've always wanted one!

          Comment


          • #6
            Originally posted by Depths of Hell View Post
            We are happy to help where we can. So if you get stuck, just ask. 🤘
            Thanks very much DOH for the warm welcome over here in air tire territory! I will definitely keep your suggestions in mind for my part order. Good tip on the chain! I'll also hit up bobdudeguyman (lol) for the silencer! Will the silencer start at the very end of the outlet on the pipe? I shouldn't even think of making that outlet shorter by cutting it off right? I'm hoping the silencer won't stick out too far. I'm actually surprised the pipe is as quiet as it is, but I live in a densely populated area so I'm sure the walkers/runners here would appreciate the silencer. I get enough dirty looks with my G230 sport with normal/RC exhaust.

            Originally posted by Marc View Post
            It's an ADA HP carb (Walbro WYK series). Air filter looks like an old ADA filter (more pleats, won't spin). It's dirty, damaged, but might clean up well.
            Buy a complete gasket set for the engine.
            Gasket set is on order! I'll probably tear through this thing on the weekend, including a good carb cleaning, but boy... I am not able to find any model numbers on this carb! Maybe its hiding under some dirt. i was able to wipe it down and can see that its a walbro carb. i was thinking it might be stock because I only see one adjustment screw... and its not marked high or low.... I actually had to close the jet all the way to get the thing started after the seller flooded it. It ran for some time completely closed.... so maybe its for the high jet?

            I have a DDM billet UFO air filter laying in a box somewhere. Same size velocity stack.. Should I avoid this seeing that there have been some specific suggestions? The air filter on there has got to go.

            Originally posted by Basement Cat View Post
            MB and DoH covered most of it. Id listen to those guys.

            Great find on the 40. You actually picked up a really sick scoot since it had MD brakes, MLC pole and the E2 pipe.

            I would recommend the ADA chain tensioner. It is nice because it is spring loaded so it doesnt need to be adjusted as often as the stock tensioner. Also because it is spring loaded, it does a better job of compensating for tight and loose spots in the drivetrain. Definitely a worthwhile upgrade.

            Personally, your scoot looks great to me and other than the ADA chain tensioner, I probably would just run it the way it is.
            Thanks for the compliment! I picked this thing up for $450 so it seems like I'm happy with the deal after what I learned here! There are definitely some very knowledgeable people on this forum and it seems like a great community! I'll probably get an ADA tensioner sooner than later.... but I'm with you on running it the way it is (for now).. I'll get the chain replaced and the ADA tensioner done first thing.


            Last thing - On my motorcycles I used Dupont Teflon Dry Wax Lubricant for my chain, and was very happy with it. What may be good for a large motorcycle chain might not be good for these smaller chains... any suggestions on lubricant or should I use what I'm happy with on motorcycles?

            Thank you!!

            Comment


            • #7
              Hey guys, A few more questions if you don't mind.

              I use 25:1 fuel in my G23LH sport and my G230RC sport. I mainly use 25:1 in the G23LH because its a requirement for the G230RC and I choose to have only one gas can. I use Castor 927 oil if that matters. Do you see any issues running 25:1 on the G43L-D engine or should I just get a second gas can already and make some 40:1?

              Anyone know where I can get a kickstand for this thing? There was no kickstand on the frame at all when I bought it but the frame is solid and corrosion free where it would normally attach.

              Thank you!

              Comment


              • #8
                Run 32:1 in all of them, they will be fine.

                I too prefer one can for all peds, 32:1 Redline 2T in the G62's, G43, G230, G260 case reed and G23LH. All of them

                Run premium 91ish octane, although some claim the G43's run awesome on shit *** 87 octane. Go figure
                I think the castor is too heavy a oil for all three engines. But a great proven oil none the less.
                Hell Fab

                Comment


                • #9
                  I also run around 32:1 redline in all my peds. I normally run just run 87 octane unless it's the headkitted casereed. That requires like 100

                  Comment


                  • #10
                    Thanks guys!

                    I'll probably keep running the Castor 927 as I have a large bottle that I'm working on but will look into redline when I'm running low or if I notice performance issues. I'll make a fresh batch of 91 octane 32:1 for everything. That sounds much simpler!

                    I've also decided that I'll use the Dupont "Chain Saver" Teflon wax lubricant for the chain... I'm happy with it on O ring chains so I'm sure It'll be fine. The Liquid gold seems pricy for being so similar....

                    Also I decided I will use the billet UFO air filter (oiled of course) that I have in a box. Its red so seems like it was destiny!

                    Wound up ordering a new silencer as it was only $4 more than used, and will be included with my $200 parts order that should be here Saturday. I'll plan on leaving the pipe alone for now.

                    I'm excited to tear into this thing. She should be ship-shape and ready to rip by Sunday. Pictures and updates to follow. Thanks again.

                    Comment


                    • #11
                      Help!

                      So I got the ADA chain tensioner installed and everything is looking good there, but my pipe cannot be reinstalled with the existing mounting brackets. What would you guys do in this situation? I was thinking of cutting the hole into a notch to sit on top of the tensioner, and trusting the rear bolt alone to hold the pipe? Or cut the front mount off entirely? I'm stuck. IMG_0175.jpg

                      Comment


                      • #12
                        Got everything figured out. Wound up cutting off the front mount as it was very much in the way of everything. She cleaned up well:

                        IMG_0189.JPGIMG_0188.JPGIMG_0187.JPG

                        The walbro carb looks like the model number was filed off... I think the previous owner got the ADA HP carb/juice box kit. After taking it apart the gaskets are definitely WYK series as Marc said. (Thanks Marc!). The carb was very clean to begin, but the gaskets were all very brittle. Rebuild kit ordered as she doesn't idle well after i cleaned the carb which doesn't surprise me.

                        IMG_0179.JPG

                        Cant wait to ride this thing. Just waiting on the juice box gaskets carb rebuild kit and i'll (hopefully) be good!

                        Comment


                        • #13
                          Looks great Eddie, she did clean up very well.

                          How about the other side of the carb, any numbers there?
                          Hell Fab

                          Comment


                          • #14
                            The ADA HP carb and manifold kit for the GSR40...

                            They come with a Walbro WYK94... I believe...
                            It is a direct replacement for the WYK33 originally fitted to the TSi... but the pulse is in a different place.
                            I'm not sure why they grind the number off.... Its possibly to stop us finding the carb elsewhere..

                            ... J.
                            There is nothing that cannot be fixed with a good cup of Tea.

                            Comment


                            • #15
                              Thanks guys. No markings at all anywhere else on the carb... I forgot to mention it looks like it's stamped with a 3 under where it's filed... the second number I can't make out but thought it might be a 2. Looking at the model numbers they offfer I guess it's a 33. The clutch seems to be clanking quite a bit when engaging... I went ahead and ordered new sprockets. (7&8 tooth fronts and 76 rear) as it's stock rear sprocket might have a little bend (can't fully tell) and the teeth look pretty worn so time to replace anyway. I'll probably put the new tires i ordered on it while I'm at it. Thanks for all the help everyone. Time to watch some YouTube videos about inspecting the clutch and bearings.

                              Comment

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