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Above is the Carrera Crossfire fitted with a Sun Race 40T cassette. It was difficult to tell how satisfactory the set up would be without a derailer extender as it was all so out of adjustment and needed a new chain and cable. The chain geometry looked as though it would work after a fashion...

Making some progress. I think that a derailleur hanger is needed to allow full selection of gears. I have bought one hanger but it will need some milling to make it fit. There is not a lot of metal there to mill! Has anyone fitted a derailleur hanger to a Carrera Crossfire which fits...

I had better go for the 40T cog with a hanger extension, of course. 42T might be nicer but nobody seems to have done that and it won't make a lot of difference for me over the 40T. This is probably the last makeover that the bike will get as the battery can't have that much more life in it so I...

Hi, Thank you both for your helpful replies. I have attached some snaps of the current arrangement with the 34T cog. I'll look after and clean the new one better, I promise... The straight line distance between the hubs of the jockey wheels is 65mm. I am unsure whether that is a medium or...

We live in Cumbria, so we have some lovely but severe hills. The bike is around 4 years old and has done 2000 miles, so the cassette is wearing. I would like to take the opportunity to tune the gears to our hills! The current set-up is a 42 Teeth Chainwheel and an 8-speed 11 - 34 Teeth...

Sure, here is the connector block partially disassembled but the halves sticking together. Thanks.

Thanks, yes, that is where I thought the problem would be. It is fully connected in fact I have had to break the locking clip off to try and get into it. I have not managed to separate the parts yet, even with 2 sets of pliers - which may indicate that something has gone wrong ... Have you...

The Cyclamatic has been in the back of the garage since I bought a Crossfire. I have just dusted it off and given it a charge and everything is quite dry. The encouraging discovery is that it works! However, only intermittently. The groaning sound has gone but the motor only comes on erratically...

Thank you. That is very informative. I tend to pootle about on tarmac mostly but also have a run on grass and mud of about 3 miles each way which I do a few times a week and also in The Lakes, encounter some of the most severe hills. So torque is important to me. So, when needing most torque...

I had a pleasant visit to Halfords in Barrow in Furness. First I cycled my Crossfire around town and then over the slag bank which ascends steeply along the side of Walney Channel . This, by the way is a delightful maritime mtb ride with views up to the high Lakeland fells. 'The Slaggy' has...

So, my new Halfords Special, a Carrera Crossfire electrocycle. I have had a non-electric Crossfire 3 for a few years and very much like it as a comfortable hybrid bike; ideal for London commuting and bumping up and down kerbs as well as a bit on off-road paths. It rolls very well and is...

Many thanks for your helpful reply. The chain chatter occurs when the motor is off too and when back pedalling too, so it looks like a sticky sprocket. I'll give it a squirt and see if it improves. I think I will just charge up as and when as I have done with other bikes. The batteries seem to...

Very much enjoying my new Crossfire. Early days but no cutting out problems yet ... I fitted a Topeak tourist rack (not the specifically disk brake one) with a spring clip. Works fine. Only issue is that when the chain is on one of the smaller two sprockets, it chatters against the wheel stay...

Thank you for your helpful reply. The 48v set up sounds the most interesting. Would the resulting bike be UK road legal? I don't fancy the prospect of being done for riding a moped without MOT, tax or insurance and probably a host of construction and use regulations as well as not wearing the...

I have 2 Cyclamatics that have cracked on the down tube where the diameter changes. There must be a lot of leverage at that point especially if the seat post is drawn up high. They are made secure again with bolts. It is a problem with the design caused by accommodating the battery in its own...

Thank you for your advice. It has all gone dead now, save for 3 lights on the handlebars. I will need to have a real session on the stuck connector block and by the sound of it the controller as well. The connector block issue seems to be mentioned on other Cyclamatic posts and I may dispense...

Hi, Thank you for your reply. I have taken a photo but have bother uploading it. Perhaps if I gave a clearer description that would help? The connector block I am concerned with is attached to the chainstay between the motor and the controller. It is attached by 4 lugs between which the...

This intermittent fault tends to happen in the wet. So, I imagine that the problem is one of damp connections. That it is intermittent makes me think there are no major component faults. The brake lever cut outs seem to be working properly. The problem usually announces itself by the motor...

Thank you for your encouraging reply. I should be able to get hold of the freewheel tool over the weekend and will try to take off the whole component and assess it then. The unit fitted at the moment is Shimano, so hopefully will not be so exotic and will allow for a straight swap.