Aircooled Monoshocks

Hi All Looking for some advise please...MY 1985 TY 250 Mono starts ok and would run ok, however, it keeps "hunting" and pinging once it gets hot...I have decoked the piston and exhaust, and even fitted a Mikuni carb to see if that makes any difference, but the same thing happens with the Mikuni as it does with the original Yam carb.. I've done all the other usual stuff like new plug and made sure both carbs are clean and using fresh fuel.. Does anyone have any ideas What I can try next?

hi all i have just got aty 250 mono and it feels like it is riding with the choke on sluggish any ideas

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 have taken the engine out of my 87' Garelli 323 section today ready to do a freshen up its all original and has never been touched. I've taken the top end off and the piston is looking a bit ropey even though the bike ran fine!!! Anyone know where i can get a piston kit and engine gasket set for the Hiro engine????

This should be an interesting one to watch, hav'nt seen one up for grabs for a long long time, thought there might of been a few more quids on it. May need a few things to tidy. http://www.ebay.co.u...4.m1438.l2649

I have just picked up a TY Mono which is going to be paired with a chair (new challenge for next year!) I am sorting a few bits out and noticed that the rear brake pedal flop's around due to excessive wear either on the shaft or the housing in the frame. The current pedal looks like it has been built up with braise. I can get a bush made up but first I want to source a replacement pedal. I can't find any UK suppliers stocking any on the net? Or do people buy other ones and modd them (if so what one??)

After the recent topic on the monoshock Ossa I thought I'de give a heads up. Just got my copy of VMX and featured inside in full technicolour is the monoshock Cheney Ossa.

Hi, I've just got a Mecatecno Amigo for my son and would like to know if anyone could give me any technical info such as engine type and spares availability.Thanks in advance

Decided to do an air cooled mono, after spotting a frame, tank and seat for an Armstrong at this years Telford Show. With only 80 ever made, it hasn't been the most straight forward renovation, but its getting close to completion. Everything mechanical has been done and its all running and riding.....however 2 parts have eluded the search. Its missing the airbox and sump shield. I have resigned myself to the fact that both will need to be made from scratch, unless anyone out there has anything they want to sell ? If there was anyone with a complete Armstrong/Can Am mono that would be kind enough to take their bash plate off and draw round it for a pattern, I …

I've been thinking about getting myself an aircooled mono to go with my garelli 323, and was wondering what is considered the best allround aircooled mono??? I might do a few mods to whatever i buy like changing the footpeg position if needed.. i bought a 91' TY250r pinky(with a modified cylinder) on the weekend but am wondering should i buy something else instead? heres a pic of the TY

As title suggests, I am trying to rebuild my Montesa Cota 310, just wondering if anyone had a parts or repair manual, the engine runs a real treat, just the rest of the bike is the problem! I think the rear linkage is upside down???? Sits very low, so need some info. Thanks in Advance. Ivan

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…

Hi have nearly finished my TY mono rebuild . I've found a few problems on the way & would like to discuss them. My bike has a YZ 250 front brake plate fitted & iv'e had to machine a extended torque lug for the fork leg/ brake plate,anyone else had to do this? I also found that the carb had had a few DIY mods on it that didn't work very well.Corrected this by adjusting the float height to 23mm with the float tang just seating in the float valve slot, next fitted 42 pilot jet, highly vented air box lid, 145 main jet & needle back in the std position , air screw 1, 1/2 turns out. Bike now starts easily & runs like a top. Plastic petrol tanks don't fit very we…

My two 1984 Yamaha ty250 Mono's.

Hi, does anyone know a good jetting starting point(main+pilot) for 26mm PWK f/side carby for a TY250 mono, Ta.

Hello all Iam trying to identify my ty250 mono ,I was told by the seller it was a1989 model but according to the numbers its not ,the engine no is 38V-010***is a 1986 2AF European model and frame no is 4AJ-0020** is a 1991 Japanese Model,can anyone confirm these numbers I can't find much in the way of info on the web,I know its quite easy to build a bike from different parts but just in case I have the wrong info I'am asking on here. cheers.. Pat...

hi ....im getting a rebore on my yamaha ty 250 mono could anyone recomend what pistons are available and what modifications if any do i need to do to make it compatible....Thanks for any replies.

After buying a 1989 jcm europe of ebay that was running and just sounded like it had a bit of piston slap i have striped it and found the piston smashed to bits which has wiped out the barrel lining and head .I have managed to find another barrel and head second hand but can not find a piston anywhere !! i am now thinking it might be easyer to find elvis ! Anyone any idears ??????

Hi all, Spent a couple of hours in the quarry on the weekend just having fun and then it happened...bike came down on top of me but I managed to save any damage(bike not me)...as I was holding it up (and trying to think how do I get out of this one) it occurred to me does anyone really give the underside of the engine a really good clean? Just a thought Feet up!