Aircooled Monoshocks

I'm freshening up the engine from my 87' garelli as been as it's never been touched since new, and not sure wether to have the cylinder replated or have a steel liner pressed in instead??? Originally the hiro engines have a plated bore!! What do people think about this???

My garelli rear silencer always had a rattle coming from the inside, so now i've rebuilt the engine i thought i should sort the silencer out??? So i've carefully cut the back off the box with an ultra slim cutting disc, and when i opened it up WOW WHAT THE HELL???? inside its got a pipe coming from the front of the box about 4" long going through a plate and then another 3 plates with small openings alternating at the top and bottom and the last plate has a short perferated pipe going out the back??? it seems quite a restrictive design to me, i was thinking about removing the plates and modifiying it to like a modern design with one long perferated pipe and packing a…

I found an online manual for the TY350 mono that says cylinder head nuts torque to 22nm. Is the setting the same for the TY250 mono? Does anyone know where I can download a 250 Mono manual? Thanks

On the verge of locating and (hopefully) purchasing a 2nd plastic tank. Anybody own one of Paul @ Shedworks tank shelters for a ty250 mono? IMO they look great, but... Questions; How easy is it to remove for servicing the air filter? Do you remove the shelter and the tank stays in place each time? Or is the rear tank bolt not fitted and the whole thing pivots up at the front? How strong is it? ie can you sit on it, resting, in between sections? Any other opinions? Thanks in advance.

Some of you must of encountered thie before. I need to change the rear wheel bearings of a Mecatecno Dragonfly im restoring. The trouble is that the long spacer inside the wheel that the wheel spinde slides through is fixed into both wheel bearings.It wont budge at all. Id normally tap the bearings out with a long screw driver from the opposite side of the wheel. With this wheel the screwdriver just slides through and there are no ledges to get a purchase on. Any ideas. I dont want to have to resort to picking the bearing apart . LOL

Any one got any tips on stopping the above snatching?

I was just wondering if the only difference between the Ty250 and 350 is simply the engine size/bore? I can only get hold of a workshop manual for a 350, and wondered how relevant it was to my 250. Looks pretty much the same, but my friend said that once about a girl he met in Thailand...

Hello new to ty's just got a 86 ty 250 mono with a couple of problems but one i can not work out when you rev the engine revs pick up slowly and throtling off revs die down gradually over 2 or 3 seconds .Have checked reeds and there is no gap, and carb slide is working opening and closing fine the cables not trapped any ideas ? thanks Adrian

Hi I have a JCM 323 that I use infrequently. At the weekend it started fine on the Saturday afternoon, but at the Sunday trial nothing (although there did appear to be a week spark). I suspected the kill switch and with this disconnected it works fine. The switch was connected to the blue wire on the Motoplat ignition coil and I think it just breaks the connection. Today I have fitted the lanyard type switch from my Beta (and it worked fine there). This still does not work, but again with the blue wires just connected it fires up every time. I have put a meter across the lanyard switch and this seems to show an open circuit with the cap on and …

Hello all I have just got my first ty250 mono,an 1989 model (i think) iam trying to find out what the oil /fule ratio is can anyone help ? i will be using fully synthetic oil, also anyone know of any good sites to find out the specs of the 89 model ie carb settings, oil capacities, etc cheers pat.....

Having repacked my middle box ive still got a knock on the engine it seems to knock on the top of the stroke so im totaly baffled as there is no play in the big end or small end so all thats left is the piston to replace even though it looks ok . Ive read where a dt250 or a it250 piston will fit as they are the same as a ty250mono piston but a lot cheaper if so is there a certain year for each piston that will fit any help would be appreciated as im totaly baffaled !!!

Anyone out there know where can get a

I am thinking of building something a bit different, How far can you go? is the only criteria air cooled motor or is like the twinshock can of worms?? I am thinking of modern frame with c90 honda power (or lack of it) may try a little 80 gas gas or beta,

hello there can anyone tell me where i can find a copy of a manual or owners handbook for download for a1989 250 mono cheers...........

Hi, Can anyone advise if the TY250R Final Drive Guard Protectors are still available, Sammy Miller no longer list one in the catalogue ? also are there any wide footrests currently available that fit to the original mounts ?

Here I go again, trying to talk myself into or out of another motorcycle restoration. I've already started on the engine and I had been debating on keeping it as a "spare" but I have the frame it came out of.... So toying with the idea of jumping in on another one. Any words of encouragement or discouragement would be appreciated. I am missing the following parts: Fuel tank, seat, front wheel, front axel, and the brake light switch.

I did a bit of trials in the 80's on 70's twinshocks as they were all I could afford at the time and I've not ridden trials since but have done plenty of green laning and the odd enduro. I realise that a very modern bike would probably be the best bet for ease of use but I have no desire to own one.......I just like aircooled traditional looking bikes so will stick with twinshock or aircooled mono class. Would I notice much of a difference between riding an aircooled mono and a 70's/80's twinshock if both bikes were well maintained and sorted? Will I make it easier on myself with a 90's mono bike or is the overall technology between the 80's & 90's bikes not that m…

hello folks iam thinking about converting my crap front drum brake to a disc.it is my understanding that the forks and disc from a fantic will fit,can anyone tell me what model fantic i need to get the parts from. sorry if this has been posted before. cheers Pat.....

Hi guys, Im having a problem with my 250 yamaha pinky! when say in first gear and doing a tight turn(when throttle control is needed most!) the bike feels uneven ,snatchy, ive cleaned out the carb and jets but noticed 1, the needle at the tip is worn 2, is there supposed to be some sort of surge baffle where the main jet sits (there isnt one on my bike!) it revs fine as it should do at all other throttle openings! thanks in advance!

I have a 92 pinky mono, the rim on the rear wheel is badly corroded on the inside, as Z spokes are hard to get I want to get another wheel but with traditional spokes. Talon have their own TY hubs(using trad spokes) and could build a wheel for me, the problem is that they are unsure if it would fit the pinky. Are TY wheels interchangeable regardless of whether it's an old TY hub or a new pinky hub? thanks.