nubsey

Yeah I thought I might have to do that, and the carb looks a nightmare to get off. Hay Ho. Also will I need new gaskets. Nubsey

Hi all Nubsey again. Our gas gas 125 txt 2000 has taken to not starting. But if we take out the sparkplug then put a little fuel straight into the chamber and put the sparkplug back it starts first kick. Has anyone else had this problem and if so what was the cure . Nubsey

suzuki250 you are a genius. I told the Grandson that I done it by hand because of my age, and I was not so flexible. So now I can tell him to do it that way because, Granddad told him too. It really is a pig to do it with your foot.

Hi all and thanks for the many posts. All understood. As I said I wrongly assumed that the spring went on the oil side, so it is in the wrong way round. Still it seems to be working ok at the moment, so thats the way it will stay. I will have to ruin the seal to replace it, so might as well leave it there till it goes again. Have just returned from a long weekend away. It was not meant to be a long weekend, but the alternator packed up on the car, so was unable to return till it was replaced.Years ago I would have thought nothing of replacing it myself, but nowadays you are lucky to be able to see it, let alone replace it. Will have ago at repacking the exhaust sometime soon. If we can get it lawnmower quite then he can do some practice in the back garden So far the bike starts up much better than it did, and the smoke is unseen on low revs, Finding neutral is quite hard as you cannot rest your foot on the footrest, and just lever it upwards for neutral. Loads for the lad to learn. Once again many thanks for all your help on the subject. Nubsey

Oh Dear, I was always told that the spring side went towards the oil. I.E. the oil is in the clutch case so the spring goes that side. So now I have an oilseal round the wrong way. Double oppps. This of course is where you need a workshop manual. Also, you wonder who puts a bike back together with a hole in the seal. We live but sometimes we never learn

Just thought that I would let you all know the final outcome. Got a puller and the flywheel came off as easy as pie. This is what I saw underneath. It looks as if the seal is in the wrong way round, also the is a nice hole in the seal. Replaced it with a new seal, and had the metel ring on the outside facing the fluid. Now there is a huge improvement in the smoke, it still smokes when revved hard, but nowhere as much. Also we are running on 50/1 premixed fuel. Thanks for all your help. Nubsey

Thanks for that oni nou, Have ordered a 13 piece universal puller. Should do the trick. I an getting quite a selection of pullers now.

HELP Hi all have hit a snag with the oilseal. I need a puller to remove the flywheel under the big nut on the clutch side. Anyone know whats it's called and where one can get hold of one. It looks like it would have two bolts that go into the flywheel with a bar that would go over the main shaft and then another bolt that would screw down on the main shaft. Have put up a picture of the part that has to come off.

Would love to swap my 125 for your bike, but those who know better would not let my 13 year old grandson ride it. Still just let her learn on a big bike. Nubsey

Thanks so far for your help chaps, Have just ordered a new oil seal and a new gasket. I know the old gasket has only been on for a week or so, but for a couple of quid it's not worth taking a chance. Will also have to try and move the engine forward a little bit as the clutch cover fouls the frame, but a 1/16" movement forward and it would most likely clear. Will do the exhaust next. There is a problem with a leak on the midbox, so perhaps it will need welding or something, but will know more when I take a good look. Just hope it is the seal and not the gasket thats gone. All the best Nubsey

Hi Zippy, Many thanks for your opinions. When we got the bike, there was an old oil seal so wondering if it's already been changed, or perhaps there isn't one. Only a strip down will tell.Many thanks for saying it's only the clutch side, save me money on stuff I don't need, as I was going to do both sides. How do I know how much packing to use, can I use the old packing as a pattern and cut off the correct length? Oni Nou Thanks for the link for the videos. That was how I knew how to put back the clutch etc. But all tips most welcome. Jim Snell seems a really decent sort of chaps. All the best to all Nubsey

Wheelieman14 Many thanks and all taken on board. We have just got this bike, and we have a lot to learn. I use to do Banger racing so mechanics, are not to great a problem. It's just getting the right diagnostics. It is always a wonderful thing that people pick up on the little things. I have always said it's the little things that count in life. I thought that the kickstart lever was in the right place, but In could never get my foot up there to give it a kick. Thats just getting old I thought. But you have seen I have put it back in the wrong place. So will move it back a couple of notches. The Grandson just wants to ride the bike, and I want to get it right. I love learning about mechanical stuff. Still we will have a word with the people at the trials this Saturday, and perhaps we can get him in with a 200 a day ciggy machine. It will do him a power of good to see 6 year olds beating him. Now back to the repacking. I would need the size and length of the repacking material, to stick back in the exhaust pipe. I really need a workshop manuael on the bike, but they do not seem to exist.

Well we had the bike not starting saga, So here comes the smokes like a chimney saga. Thanks for that info chaps. Is this a particularly hard job to do. I think the clutch side should be ok, as we have reassembled the clutch etc. But am unsure as what lies behind the ignition cover. It looks like I will need a flywheel puller,or is there a trick you can use to save ones brass. Have looked on Trials and tribulations ltd and they seem to have all the parts I think I will need. Gas Gas trials generator cover gasket (NOT PRO) part number MO4431000G64. Gas-Gas 93-2003 (edition) Main Bearing seal Part Number M01217001G55. 2 of Gas-Gas JT, JTR TX, & TXT clutch cover gasket 92 to 03 Edition. Part Number MO4430002G62 Flywheel Puller Gas-Gas Pro & earlier JT,JTR & TX Part Number BUZZETTIGG Hope the puller is ok! here is a photo. I would not worry to much about the lad not wearing a helmet etc. He is nearly 14 and knows it all. Well nearly all. Except when the bike is in gear, how to start it properly how to control it, how to ride it correctly, IE stand up when riding it. But yes that is a good idea, even if only to try to get him to do things correctly. But I do find a quick burn to the leg is a great way for them to learn and listen to what they are being told. The smoke does smell of oil. The young lad that we bought it off stated that he was going to change an oil seal as it was bogging, and there was an old oil seal in the box of bits. So he might have done the clutch side but he could not remember what he had done. It might just need the ignition side doing. If I do the ignition side first will I have to drain the oil out of the bike? Now what is this about packing the exhaust. Have never heard about that before. There is a leak where the pipe goes into the silencer. Ok on removing the pipe and letting it drip into a bucket, sounds like a good idea, as there is a lot of oil residue from the exhaust. The fuel oil ratio is 50/1 so should not smoke like that. With what I am spending for anothe 50p I coukd have bought a new bike.

Hi all yes it's Nubsey again. Well we got the engine started, but my this thing smoke 200 hundred a day. I have have my assistant run the engine for a while, but it sticks out smoke like they have just elected a new pope.. \please see my you tube video. A PICTURE IS WORTH A THOUSAND WORDS. Sorry for caps lock. Any way as Max Bygraves would say. "Let me tell you a story". Bought the bike a gas gas 125 txt 2000 with the clutch side of the crankcase stripped down. He said it was to change a oilseal as it was bogging. Put bike back together with a new clutch etc. Finally got bike to start and smoke everywhere. No Bogging. I.E. revs up ok. So now the question is, where is the smoke coming from. I seriously suspect the oilseals on the crank case. Could drain the oil, from gear box and run it, but I suspect it would only prove my thoughts. It is quite an oily sort of smoke, there is oil coming fr5om the leak in the exaust system alsoo when he stared it for thre first time the plug was only put in hand tight and there was black burnt oil around the sparkplug. Now to the questions. 1 I take it that there are two oil seals on the crankshaft. One on the clutch side and one on the gearbox side. Are these oilseals the same, I have had a look in the parts pictures and I think the part number is,MT12944200. can someone confirm this. 2 As the bike is a bit old, are there any other oilseal that are the same. Also possibly cheaper. 3 When I go to start the job I will have to remove the big nut on the clutch side of the engine. This is the nut that connects to the crank shaft. Does anyone know what size the nut is. Nice to have a spanner or socket to hand. I think that is about all at the moment. I would love to take the grandson for his first trials, but could not bring myself to other competitors sitting behind a bike that smokes like that. He also still has a lot to learn. I never had that problem when I was his age. All the best Nubsey PS the choke was on all the time he was riding the bike. He never listens to a word I say about starting procedures.

Many thanks copemech, yes I will get around to checking all above reply. First I need to sort the smoking engine. See new question.

I hope that is the case, but deep in my heart I suspect that it needs a new crank oil seal. And of course it will be the one on the gear box side. But Ho Hum, I am actually enjoying messing with the grandson and showing him how engines work. He has ridden the bike around the garden, and the grin one his face was worth a million dollars. He had told me that he had ridden a mates bike before, so he knew what he was doing. So Quote of the week for Connon my Grandson is. Granddad I'm revving it but it won't go. Now needs to learn about clutch and gearbox etc. Not to sure who is having more fun, me or him.

Thanks oni nou.. Message received and understood. Just got to find the bits. But I know exactly what you are saying. I was wondering if you can remove the radiator cap and watch the water flowing past in the radiator, as one would do in a car. Many thanks Nubsey

Hi all again, more questions i'm afraid. How can you tell if the water pump is pumping, and how can you tell if the fan is functioning correctly. We have run the bike for a few minutes and the engine got hot.but the fan never kicked in. Don't want to blow the bike up, now that I have just got it going. Nubsey

The bike has been laid up for a couple of years. So perhaps it needs a good run.The main thing is it now runs. Might be a bit of excess oil getting in from clutch. The oil we put in was Putoline TT trials pro. Sounds grand but who knows. We will see what happens.

Hi Chaps , and thanks for all your help. We now have a runner. Smokes like a chiminy, but I guess thats because I put in 50/1 fuel. I think it was the tips for fresh fuel and a few drops straight into the cylinder that done the trick in the end. I Just found out that Grandson has never ridden a real bike before. So quote of the day from Connon. "I'm revving it but it won't go". I had to keep telling him to pull in the clutch he said he was but the bike just kept on going. So now the real fun starts. Once again many thanks to everyone for all your help. Nubsey

At the moment all that has happened is the I have a night time spark. Cannot be seen in daylight.. Next trick is to do the fuel etc. But I am still worried that there is a weak spark. At night it is a nice blue colour. But will it fail under compression? Will try the plug from the lawn mower to see if it is better. I guess that with the grandson being fit he could try and bump start it. The real question is how strong does my spark need to be. Bring back points and condensers. Also is 80 to ! right. Thats nearly neat petrol. I was thinking 50 to 1 max.

That is all to be done tomorrow, but like the idea of a bit of petrol in the plug hole.

OK latest breaking news. Just been out now it's dark and there is a small spark at the sparkplug. But can only be seen when it's dark. Is this normal for gas gas machines. Am I flogging a dead horse carrying on or can I do better and get a nice big fat juicy spark.

Hi all just bought a new digital multimeter, and it shows that I have 0.4 ohms on the primary side, and about 6000 ohms on the secondary side. I have just wastched a video on you tube and it showed my type of coil and it gave much the same results, so all looks ok with my coil. Nubsey

Hi all. Does anyone know how to test an ignition coil on a gas gas 125. I have watched how it is done on you tube, and they state that you should get a reading of about 2 to 5 ohms on the primary side of the coil. On mine I get 0 ohms. So I bought a new coil and that gives the same reading. The coil is quite small so is that normal. All the best Nubsey