Twinshock

I dont get the mag myself, but heard they built a really tricked up TY175 over the first few issues, and the bike ended up getting sold. Wonder how much the bike went for, as a mate of mine used to own a TY175 in the 1970s, and is looking for another one, but doesnt want sometthing needing lots of work?

Four stroke Bultacos, Montesas and now this? A friend sent this along to get posted. He's in the process of getting the caption translated but if anyone can assist it would be appreciated. I don't know enough Czech to get drunk or laid...

hi i have a swm 240 and have no idea how long the current piston has been fitted. what lifespan would you expect to get from a piston before changing it or the rings? also could i tell the condition of a piston with a cylinder compression guage and what would be a good pressure? thanks for any help matt

Just wanted a bit of advice on Electronic ignition. I'm thinking about fitting some Electrex World electronic ignition on my AJS Stormer and was looking for a bit of confirmation as to whether it would noticeably improve the engine pick up from low revs. The bike is fitted with points and set up 2mm btdc a the moment and does actually run a treat but I keep telling myself that static ignition like what I have can't be getting the most out of the engine. Any advice from any two stroke experts out there, I know some of you must have been motocross stars at some point. Cheers for any replies.

Saw this at the show Gaff, thought you may be interested. I can email you the images in larger res if you like, send me your address again. Sorry but I didn't get a picture of the other side and that 'beutifull' exhaust!!!!

Falcon Shocks I have a pair of Falcon Classic shocks fitted to my Tiger Cub, what should the air pressure be? as they have never rebounded any sense. I weigh 85kgs

Hello Everyone I suspect that some of you may have owned one of the above bikes at some stage (and now decided to go a bit slower) and I am hoping you may be able to help with a problem I am having. Bought the bike sight unseen and when I got it home discovered that all that was claimed in the ad was not factual, but that is my problem now. The bike starts with no trouble after a couple of kicks. When I go for a ride, 1st and 2nd gear no problems. If I increase the revs above approx 3000rpm the bike starts to splutter and run erratically. Just does not like high revs. Things I have had checked are coil -seems fine, swapped for another spare that I have - same prob…

I'm riding 1970 Montesa Cota 247. I'm beginner and stating to compete in vintage trails events, meaning riding in woods. My bike has 10/48 sprockets set. The Cota manual indicate that the factory bike has 11/46 set. The difference is about 12%. But what does it mean? My main goal is to ride as slowly as I can in 1st gear and maintain smooth acceleration when needed. Does the 11/46 ratio is slower then 10/48? Should I changed back to the factory setting?

http://cgi.ebay.co.uk/SUZUKI-BEAMISH-MONOSHOCK-250cc-Trials-Bike-/180624551151?pt=UK_Motorcycles&hash=item2a0e0fecef Now is this an air cooled monoshock or just a travesty ? Thought it was April 1st.

Hi, is it possible to run a tubeless tyre on a tubed rim? or would it be a big mistake. Also are the tubed michelin tyres that are still available exactly the same as the tubeless x11. thanks ,

CHECK THIS OUT

The carb on my Montesa Cota is worn out and distorted. The bike is a 1972 Montesa Cota 247 frame number 21M8xxx (mk4 silver frame). It currently has an Amal Mk1 627/414 which doesn't seem to be listed on the Amal website, is this really a Cappra or scorpion carb? I'd like to replace the Amal, can anyone advise what the correct carb is for that year i.e. 627/427 etc? The Amal site offers a number of options for a '72. I'd like to keep it simple and original and stay with the Amal. Thanks

How far are you allowed to mod a twin shock before it is classed as a special . Has anyone be banned, and what with. PS not talking pre 65 its just bonkers.

I need some help here please. I have a 247 Cota around 74 75 vintage on standard bore (72.58) that has bad rattles in the top end. New rings, pin, bearing have not done much to stop the problem. I bought a new piston and rings advertised for a Cota 250 (72.75) (made in Italy) but have found that under the original packaging they are marked for a Bulty 250 Sherpa. That was crossed out and Cota written in texta. Both pistons are nearly identical. Original Cota has a port on the intake side with oval ends, the new one has a port with rectangular ends. High and low skirts appear to be the same. Ring pegs on the old one are at the front, the new one has them at the rear…

My KT250 needs to have the under-engine frame rails pounded back away from touching the engine. Again. I'm very tempted to just cut them out and go with an aluminum plate shield instead. What's the usual thickness and material used for this application? 3/16"/4-5mm and 6061-T6? Is there a bit of air space left between the plate and engine or do you run a sheet of conveyor belting or something similar in there to add some additional cushion? cheers, Michael

Has anybody on here had to date a Seeley for registration purposes. If I want to date a Yamaha I know to write to Yamaha and obtain a letter. But who sorts it out to register a Seeley. Luckily my Seeley is registered, I am enquiring for a mate who wants to register his bike.With the bike being made in such a small number I wonder who has the relevant info. Thanks in advance. PS What after market shocks do you find work well on a Seeley. Thanks

Ok i'm looking for any info anyone has on these bikes. Am i right in thinking they are French??? Big big thanks for any help..

Got a back wheel for my Sherpa with a brand new 400 x 18 Barum Trials Tyre fitted. Looks knobbly but are they any good?

I have just been given an older twin shock bike. Ive been told it an rtx 175. Does anyone have any info on this bike. The engine looks like a cz but any help would be appreciated. Cheers Steve

Could anyone give me some guidance, I am about to re ring my two stroke engine,it has an iron bore and rings, most people say the bore should be de glazed but i found this article which suggests that its the worst thing you can do CLICK HERE