Yamaha

Hello Trialists, I have access to a bearing supplier and would like to know the bearing number of the tapered Timken type steering bearings upper and lower to replace the OEM ball bearings. Thanks guys.

Hi All, I've got 2 TY15's on the go, just started to strip the motors and have found that both clutch baskets have perceptible rotational play between the centre boss and the basket itself. They seem to be riveted together.... is this normal or would the rivets require a remedial hammering? This is yet another in a probable long line of questions during this dollar sapping process!! Thanks - Mark Perth, Australia

Hi, I'm stuck at work and need to know the thread and pitch size of the swinging arm bolt for a TY 175 please...... Could anyone help? Thanks Dud

I have a early ty 250 mono, the clutch is slipping when i have it adjusted so that it bites where it should, and the only way i can find to stop it slipping is to adjust the cable so it bites very close in which isnt ideal. Does anyone know if there is anything that can be done about this? Cheers Lewis

Got a leaky clutch arm is there any thing I have to look out for, looks like it can be changed from bottom of motor? Any comments would be greatly appreciated, thanks david

Has anyone have any idea on the best size sprocket for a ty pinky as i need a new one and dont know what the best one to buy as the one on there seam s a bit big and thinking to go down a few teeth so if any one can help out i would be most greatfull

Hello out there. I've cleaned me carb and its alot better.Finally took me petral tap out to have a look and it was a right mucky object. Anyway Iam still getting fuel bubblin out of the end of the exhaust. Would this still be the float in me carb being faulty? Cheers Squid.

Does anyone know which model and years of the 250 had the speedo on the left fork leg? I think it looks cool and my bike didn’t come with it but it has the drive with a plastic blank where the cable goes. It looks like some 1974 models did have it judging by photos. If I ever get my engine finished I’d like to have that feature

G'day, hope you guys can help. Have installed new races in the frame top and bottom that came with the new roller bearings. I matched the stamped numbers and brand so all should be sweet. But: the top race sits a nats just below flush with the frame, so the bearing sits a tad high, which I assume is the way things should be so the top section has something to turn on. Is this right? The race will not go in any further. The botttom race is in snug as, but more recessed, with space for what I assume is to accomodate the black rubber dust seal that comes as part of and at the base of the bearing. Again, does this sound right? I question it because the seal doesn't slip into …

Looking for an answer, I have a TY250 with engine serial number consisting of a "2 digit number" followed by an "arrow". The number is appears stamped in with a flat screw driver or punch. The vertical lines under the number look original, I have another engine to compare it to. Does this mean the case was replaced with a spare part? Has anyone seen this type of numbering?

Can anyone recommend where I can get my TY250A engine serviced/checked over - it seemed to run ok before I took it out for re-build but would like someone to give it a service / new points etc before I put it back in the frame. I am located in North Yorkshire England, but happy to travel for the right person.

Hi, I have a TY250 Mono and I was thinking over the winter to sort out it's gear box. Specifically the annoying false neutrals. Problem is i've not split a crankcase before and so i have no idea what i'm looking for. I'm guessing something must be worn but could anyone point me in the right direction of what? I have a manual but it doesn't cover problems due to 20 years of wear and tear! Thanks!

Anybody got a spare kicking about they'd be willing to part with?? or any idea where i could get one.....

As briefly discussed in a recent post, has anyone else fitted a Mikuni TM28 flatslide to a ty350 mono with success or not and what jets did you end up using in your region. I just put one on mine and changed out to a #145 main and a #40 pilot with the needle on the top groove. It's only been ran at a slow speed on flat ground in my small yard so yet to be tested.

After a bit of caveman like spannering need a new carb for 250 mono . Has anyone fitted a carb from a 250 scorpa I have one out of a 2002. Wondering what kind of mods adjustments involved.

just got another ty 80 for my lad as i got one last week and it was a bag of s*** no power etc took barrel off and it had been bored to the max +2mm so i put it in the shed then friday i dropped on another got this home and it rattles like crap its been bored out to +1.00mm there is no wear in big ends or little ends and piston and barrel seem good, have recipts with it where its had £330 spent on the engine new conrod kit ends and rebore etc at trail and trial, the rattle is the same when hot or cold sounds like the piston is tapping on the spark plug but it isnt if you grip the barrel and head itdoes go away any ideas as its driving me daft, cheers mick

Hi all i have just got myself a Ty mono after looking for one for ages and its great.I had one about 17 year ago but cant remember how much engine oil goes in,off the top of my head 800ml seems to ring a bell or is it 600.And what oil is suitable as its had ATF in it.Also what 2 stroke is best, i run my GasGas on castrol tts the guy i bought it off said he was running rock oil fully synthetic 85ml to 5 ltrs.I will have loads of questions to ask in the future,but for now i am just going to ride it & enjoy.

I'm looking a a new seat but can't seem to see where and how you fit it with the aftermarket triangle shape brackets. Here is my frame. Thanks for any help

evening all, my rebuilt ty 175 engine was chucking out spooge despite sorting out the jetting. However, having burnt out the exhaust for a few hours on an open fire, then cleaning up with caustic soda, then coke (which made it all shiny inside), the spooge has stopped, the plug is a lovely colour and the silencer end is dry. the bike also sounds and runs much better. if in doubt ............................... ...................... burn it out ;-]

Just sorting out the handlebar electrics on my 1974 TY250a restoration, all looks ok except the headlight high/low beam switch is missing - anyone know wher I can get a suitable replacement?