Twinshock

A friend has just managed to get hold of what appears to be an ex works 37AT. We are looking for more info than the limited amount I can find in Roy Bacons books.(Postwar singles and Classic two stroke trials bikes.) The bike is 99% complete and looks original apart from the exhaust. Any help would be appreciated,cheers.

Does anyone have any good advice on fitting a tubeless 4.00x18 rim to a Sherpa rear hub, 36 hole?. eg where to get a suitable rim, could a Montesa type rim be fitted as the Sherco system doesn't seem to hold air for any length of time when used hard, any pitfalls to be aware of?. Thanks. PS I've just found an earlier post on this subject with good info from Nigel Dabster. What type of Yamaha hub do you mean Nigel, it must presumably be a 32 hole setup for the Sherco rim?.

A little tanned man left this on my door step today............ Can you guess what it is yet. Yes.......... i know its a bit of a nail at the mo , but you just wait and see . Exact answers only please.

Hi There, Has anyone got a Honda TLR 200 for sale? Thanks Ash

Hi there i wonder if any one can help me with the removal of the clutch basket on my 1974 mar as i need to replace the crank seals and primary chain . Done the flywheel side and the cush drive is loose ready to take off but i cant get the basket off , i have removed the nut but not sure if the basket just pulls off with a puller its got a sort of washer/ nut thats round behind the nut and locking washer that looks like it needs to be un screwed ???? thanks for any help you may have . cheers martin

I have just purchased a Montesa 348 which appears to be fitted with a Dellorto VHBZ carb as opposed to the original (i believe) Amal. This got me wondering, how interchangeable carbs are and how does changing the carb change the behaviour of the bike? Any knowledge of this subject would be of interest as the previous owner purchased the carb off of ebay and I am wondered if a different carb would change the characteristics of the bike.

Just acquired what I am led to believe is an Ossa TR77 - a 250cc Ossa of 1978 vintage (Frame No 8-700191). Does anyone know anything about these bikes? and more importantly does anyone have the correct air filter and side panels for this bike? It might also be very useful if someone can remind me how to attach a picture - I can't remember how I did it previously and the help menu doesnt seem to have anything useful to say

I was wondering what everyone was doing for rear tyres. I have been told the tube type michelin has been discontinued, is this true or not. I have a tubeless 36 spoke morad rim but am resisting using it as I would like to keep the bike looking period correct. I can get IRC tube type rears, but was concerned they might not stay on the rim, the bike is a bultaco with akront rims. Cheers Greg

Enjoy.

I have a bike fitted with a 110mm conical Grimeca hub which is very similar to those fitted to a Fantic. It differs in the following ways; the strengthening hubs internally are much larger, there are small strengthening ribs visible on the outside of the hub, the distance between the spoke sets left and right is narrower resulting in a narrower hub. It was originally white. Fantic sprocket and back plate fit. The bike was constructed in about 1983 or 1984. Does anyone have one for sale or know of a model it was fitted to.

Potentially stupid question, but... What is Octane booster and should I be using it in any of my bikes? (fantic 200, Yamaha ty250 mono and 1954 tiger cub) Thanks Sam

Can anyone out there tell me what size bearings should be used in the rear wheel of a TLR200E? The complete NTN 6201 LU bearing on the drum brake side fell out when I took the brake drum off. The hub looks ok - there's no crack in it so I'm wondering if the bearing is the right one. TIA, Pete

Does anyone know if a 349 tank/seat will fit my 348 Montesa?

Hey, haven't had too much time to post some pictures of my bike up as iv been to busy fixing it and making things for it at college. Its a RTX-T 125, got it for

Im trying to sort a problem weve an ossa engine ive got up and running it starts up ok, and 1st and 2nd select ok and the bike pulls away normally BUT wont shift into 3rd gear! anyone had this problem? the gearlever not bent and the bike selects 1st and 2nd going up and down the box when riding it but no 3rd gear and upwards! HELP!!!

hello, I'm returniung to trials after retiring 20 years ago at the age of 18 !!. Having spent 20 years racing modern motorcross and enduros its time to return to trials. However the decision has been made to ride twinshocks as these were the bikes I remember, and I have recently switched to classic scrambling and just love the atmosphere that seems to revolve around the older bike fraternity. Having obtained a couple of Montesa 242's one has done next to nothing so will be kept for best, the other has done more work but still tidy. The opinion on these bikes by others seems to be that they are a bit fragile and spares are very hard to find. Having rode them a few times t…

Hi Chaps! Ive dragged the old kt250 out of the garage to do up BUT! It needs some new rear shocks i swapped some Betors over from the ossa these are 14 1/2 " between centres when fitted to the KT they jack the rear end up a bit high (i think these are the shortest length avalible?) does anyone do rear shock lengths of around 13 1/2 ? also the bike seems to run to rich ,ie when you flick the choke on the engine cant take it and dies also you can nearly always start the bike without the choke. The airfilters clean and the airscrew is set at one turn out from fully closed! could the needle do with dropping down a couple of notches? thanks in advance Nick.

According to their site this fit on many Montesas but not on Cota 348. http://www.bmz.fr/achat/produit_details.ph...703&id=3924 Anyone knows if there are available elctronic igninition that will fit straight on 348?

Hi All Attached is a photo of a front mudguard from a Jumbo SWM. They were a universal guard with 3 flat sides rather than a rounded section. They are not stamped with any logos and were used on several other bikes including Armstrong Monos, early air cooled GasGas and even the RTX. I have recently seen several bikes with white versions, but no-one seems to know what make they are or where they got them from. Has anyone any idea who manufactured these and if anybody is still selling them in any colour. I have checked and dont think they are Acerbis or Gonelli......any other ideas? Thanks Martin www.motoswm.com

Does anyone know much about the Garelli 323 monos??? I might be buying one on the weekend!!