Aircooled Monoshocks

I'm planning to convert a Hiro 125 engine from the end of the 70's into a trial engine. Why? Who knows! The engine has six speeds and a reed valve. It's from an Ancillotti 125 moto cross bike. I have the Ancillotti frame too but it's too heavy and wide to converted into a trial frame. So the frame would be some monoshock (or twinshock) trial frame. Any opinions, advices, ideas etc.?

Thought I'd get in 1st and title the topic before some one else says it!!! This section has been quiet for ages now so I thought I'd post a couple of pics of a project I should have done by now. I've been collecting loads of parts over the past year or so, I just need to get the rest of it mocked up and fabricated then strip back down and refurbish it all. I was lucky to get one of the last 2 new mudguards in existence, I'm not going to use it though, it's too rare so I'm getting replica's made as I know I'll end up breaking it. Spot the parts that shouldn't be on the bike.

Can anyone tell me how the shortend reed block mod was done and some pictures if pos cheers

Hi All I have a TY250 Mono ( 1985) that has the original foot rests...As they look a bit small and battered I would like to know if there are any replacement pegs that could be used? Looking where the originals are mounted..it seems even if i cut them off, there s minimal space on which to weld after market hangers... Just looking to see if anyone out there has done any mods??? Thanks

Hi all, I have recently had a TY Mono fully rebuilt (engine) but whilst it runs "ok", comparing it to a friends on Sunday who has recently bought one the engine goes appear more flat. Now that I know the engine itself is 100%, I want to explore the front exhaust (the rear has been replaced with a new box) and also the carb, so questions: 1) I have a brand new Mikuni VM26. Has anyone tried one of these and do they have a starting point for jetting (slide, needle etc) 2) Are replacement front exhausts available or is it a "cut it open and weld it up" affair? thanks, any advice appreciated....

Hi, I am having some issues setting up this air cooled mono, its recently had a full engine rebuild, I have cleaned out all the exhaust system and repacked it, i have had barrel off for inspection and this would appear to be correct, i have stripped the carb down and to be honest its very clean(original 26mm TK), it would run then suddenly stop...this faulted to the ht secondary ...replaced aok, i rode it 3/4 throttle up a long hill and then did a plug chop)nicebrown/tan colour(, the problem is lower down in carburation especially when warmed up, i believe the pilot maybe a tad weak, anyhow iset air screw to 2 out, and rode it around fine tuning on air and tickover then i…

I've spotted this JCM for sale on Ebay and was considering bidding for it.It needs work , but at the right price ?? http://cgi.ebay.co.uk/JCM-pre-Gas-Gas-350c...1QQcmdZViewItem Does anyone know any history on this company and these bikes and are there any spares floating around and if so where?. Thanks

My two 1984 Yamaha ty250 Mono's.

I've got an 87' garelli 323, but when i search the net i'm struggling to find much info on the garelli trials bikes??? Anyone know much about them or got any links??

I'm interested in purchasing an aftermarket repackable silencer for my TY mono (DEP, WES or those sold on FEKED). I am located in California so, as such, I'm required to run a spark arrester at any OHV park. I've been going round and round on this, trying to find a solution. I'd love to find a cone screen that will fit any of these and avoid the DIY mess I may make of a new silencer. I was also thinking of sourcing a Cobra Sparky that will fit on the back end of one of these silencers (although a bit clunky looking). I'm concerned that it may not clear the rear fender as well. Can anyone tell me the dimensions of one of these oval silencers at the back (top to bottom, s…

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'm very slowly getting my JCM SR 240 up and running again with a view to eventually selling it, to raise funds for another project for information- i used to ride it in the early 90's and it hasnt been started since then, before my dad died he started rebuilding it , the frame was powder coated, the fibre glass tank seat cover has been repainted, new JCM piston found and installed and new stickers made, unfortunately he became ill and never finished it. its by no means immaculate but doesnt look to shabby!! its now running (thanks to a friend) and i'm going to try it out this week......very excited!!!! does anyone have any idea how much oil should be in the forks, my…

just looking about for a mono swm or some parts for them??johnnyb

My son has just bought a JCM 1985 kickstart missing just the knuckle left what would fit is this the GasGas air cooled engine model?

Hello all, Does anyone know where I could purchase a Piston Kit for 1985 ty250 .75 O/S? I am in Australia and seems to be none here... Thanks Chris

Hi ! Anyone ever fit an alloy swingarm wheel & Disc to a TY mono from another bike, it seems it would be a great mod. The early gas-gas look similar ? Mine is a drum brake 84-87 TY250 Mono red frame. With a normal pinging motor ....PWK28 on the way from an yz85

A quick question? Does anyone know if a specialist tool is available to hold the inner fork mechanism when loosening the retaining bolt at the bottom of the fork leg? I read in an earlier posting that people have mede them with a Hex bolt welded to a piece of steel bar? Does anyone know the correct bolt head size to use? thanks Rob

I found this video clip last week, it's awesome to see so many rare bikes in the thick of it!!! http://www.youtube.com/watch?v=He7OW8YVdX0

Hi , just finished the Ilkley Classic trial, which has 85 miles of road work , on my 1990 gas gas 325 air cooled mono . When I was on the road and inbetween sections and stood up the riding position is very uncomfortable because I have to put too much weight on my arms and the only way to take weight off is to ride with bent knees but I find this impossble to maintain for any distance , anybody got any cures? Nick

Hi, One of my friend is selling his JCM 323. Some supposed buyer from Great Britain and Ireland send him email. Are these bikes populars over the channel since it is not the case here in France ? Regards