Yamaha

I lowered the needle jet to improve the high speed running on my '84 mono and it worked. However after trying it out I was comming back when the engine wouldn't slow down with the throttle so I hit the kill button and nothing. I pulled in the clutch and coasted to a stop with the engine reving very fast. I turned off the petrol then gritted my teeth and pulled off the spark plug lead. Still nothing - the engine kept reving very fast. I had no idea what to do after that. Then after a few seconds smoke came from around the top of the engine or under the tank or somewhere and after another couple of seconds it died alltogether. Now there is no spark. Anyone any ideas. PS Tr…

Hi guys, I haven't used my ty250 majesty for ages and now the clutch wont disengage! it was working perfectly before but i think the plates have stuck together ive tried using the bike clutching it now and then but it still wont work do i have to strip down the clutch assy to free the plates or can you ride the bike a certain way to unseize the clutch assembly? Thanks in advance

Hi folks. Just wondering if anyone has ever tried fitting a wireless digital speedo to a 2 stroke. I got one but before I take it out of its packet (and loose the possibility of taking it back !), has anyone tried it or does the 2 stroke interfeer with it? Thanks.

Hello hope you can help i cant seem to get the kick start off my pinky the nut seems extremly tight or is it a left hand thread ,i dont want to force it any more or try the left hand option just wondered if there was a knack to removal its the alloy type i dont suppose that makes a difference many thanks John.

Hi, i recently had my ty175 re-bored and it came with a It 175 piston kit ? i was just wondering what replacement pistons people put in there bikes . also what piston goes in the 200 conversion ?????

Hi there! Can you help me with a ty80 fuel tank. The problem is i cant seem to find a decent tank that as mounting lug still attached to it! Im guessing that this was a common problem with tank! Has any one still have a tank with this still attached and would be willing to make me a template and take some pictures! As i have no option but to have a go and try and repair one of my tanks cheers in advance for any replys!

Can anyone out there who has done this modification advise on the best way to go about it. Do the twinshock yokes need machining to fit the mono forks or can the mono stem be modified to accept the twinshock head bearings. Cheers dougalthedog

does any one have a copy of a manual for a ty 250 mono if any one could help i will be most greatfull

Hi i have a ty175 and am looking to re-spray some of the parts with the original white. I have rubbed them down and are ready but i'm not sure what colour white would look similar to the one there at the moment. Do you know which type of white paint i would need. Also the decal stickers that are on the bike (eg. 175cc) where can i buy these ? Thanks Ben

Dear All, I know this has been discussed before but hoping for a few tips. I'm currently 'remanufacturing' a TY250E for mildly competitive fun use and have just spent a day stripping the forks. It all came apart reasonably well (half an hour with an air powered impact gun eventually removed the damper tube bolts). A bit of careful cutting of slots with a Dremmel got the oil drain screws out and deft use of a centre punch got the old oil seals out. So now I have a collection of parts which seem relatively unworn, but one damper tube was rusty so must have been sitting in water for a while. The stanchions are pitted and will be sent off for straightening /rechrom…

Hello I have a question regarding the kill switch on my ty250 twinshock I have been restoring the bike and purchased a "push to kill switch" as the bike never had one. The swich that I have is a Normally open one, I would have thought that it would have been normally closed unless I am being thick. So the only way I can get the bike to run is to hold the switch in. I have wired it so that one wire for the switch is coming from the points and the other cable is going to the coil I am hoping that this is correct and that I have just got wrong switch. So my question is do I need a normally closed switch and is this something particular to Yamaha? as I cannot see how a no…

i am thinking on buy in a tyz 250 and would like to know any info on how good are they and what the most common things go wrong on them if any one can help i would be most great full also i thinking of buy in a ty 250 mono so witch one is the best

hi my yam 250 has totally miss matching frame and engine numbers the frame starts 493 301 9** and the engine number is 434 101 06* would this have been the right engine? if not i need the date of the frame and the date of the engine incase the parts are different i trhink ive got the frame as a 78/79 but thats as far as ive got cheers mick

Hi could do with getting some bars with a slight rise i feel a bit hunched over on the bike. Which ones are recommended also need a clutch cable with mid cable adjusters on unlike my venhill. I have sammy miller foot rests fitted and standard length shockers. thanks in advance

Hi folks, I've finally got my ty registered and am now able to use it. Since I have been using it I have been wondering why there is no guard of any sort over the linkages to stop mud and grit getting into the bearings. I know there is not a lot of room but I am thinking a bit of inner tube or the like would be just possible to be squeezed in there. I am new to trials. So is there an obvious reason why not, does it not cause any broblems or what do others do?

Group, I have a 74 TY250A. Swingarm has some welding on it. There is a 77 TY250D swingarm on Ebay. When I looked up the part numbers the 74 and 77 show a different number. Can someone tell me what the difference is? Thanks in advance. Alan

Hi all I hope there is somebody out there who can help me, I have several TY 175's that I have had for about 10yrs now one is completely in bits and the other I have never had it running properly in all the time I have had it, it has plenty of compression, been de-coked, new reed valve, plug, points, condenser, crank seals,I have 3 carbs and have cleaned and tried them all. When I got the bike it took about 20 kicks to start it and it was very sluggish and wouldnt tick over, I progressed from this to the bike going into melt down which was a bit frightening, flat out and not being able to stop it, plug must have been glowing as taking cap off didnt help, panic panic sa…

Some of you may know that I have a boost bottle fitted on my TY 175, and some doubted whether it does anything to improve the performance, anyway I came across this info and thought it would be of interest , click HERE

has anyone lengthened the clutch arm to give a lighter and more progressive action, I know it can't be lengthened much as there is not much room but would have thought it could be lengthened enough to make clutch feel better. (I rode mine yesterday for first time and found clutch a little heavy and was either in or out), before anyone suggests that clutch has a problem it is not that has it is all in as new condition including plates, drum, cable, pushrod, ball, mushroom etc. Thanks for any info.

Requesting an opinion here: Rode a Trial today. Several creek/river sections with the water probably 12 to 14" deep, also raining cats and dogs. Not in a sections but on the trail between, the bike started to run rough and finally quit (it has never done this before). Had to restart/ride a bit, restart/ride a bit then it cleared up. Ran fine for the rest of the Trial. Did I suck water into the air cleaner/carb or did I get the point wet? Well or any other suggestion you might have. Would like to solve this prior to the next Trial. Alan