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If anyone is interested, cox and turner had some on the shelf. They are also able to make the bottom rings to order.

Hi, I am struggling to find new piston rings for my 248. I have measured them to be 68.5mm but inmotion trials haven’t got them and I can’t find anything on google. any help on where to get them would be appreciated. thanks

Ahh thanks for the info. Do you know where I can buy spares? I’ve looked online but most are from America with really high shipping costs

It isn’t broken but it is very loose and as I understand it should hard to get on and off? At the moment it falls off easily. I’ll order a new one

Thanks for the list. Luckily the last owner replace the tyres, chain and rear sprocket before I got it. I took the 3 screws out of the gear selector and took it off. The ‘pawns’!? The slanted blocks of metal with a spring popped out and I looked at the plate you said about. I checked the exploded diagram I have and it doesn’t state where it should sit. it sucks there isn’t anything online I can find 😕 on another note I want to say thanks for all the help! I might be posting a lot…🤣

I’ve whipped it off. As far as I can see it looks okay. I might have to take the whole engine out and dive deeper into the gearbox

Yeah when the engine runs, the shifter moves 180 degrees as if it’s caught on something, then it cannot change gear after that. I haven’t started it yet as I want to makes sure the rest of the engine is all okay. is the manual it came with good enough? I looked for a Haynes manual or something similar and couldn’t find one. thanks for the reply

Hi, I have just acquired a Montesa cota 248. I’m new to the biking world so I need advice! Its in fairly good condition and has been stored in a heated garage for the last 20ish years. Firstly, the last owner told me the gear shifter turns 180 degrees once put into 1st gear. Is this a common issue? If not, is it easier enough to open the gearbox? I work in engineering so have a good technical background. Secondly, it hasn’t been started for years so what sort of maintenance should I do before starting it?