This link takes you to FUEL PUMP REPLACEMENT GUIDE. It's a straight-forward DIY job but remember that there may be slight differences in the hardware used depending on what MMC had available at the time of manufacture.

Hi guys, thanks for all your input, done nothing as yet other than the purchase of a Walpro pump and also a US Pro fuel pump pressure testing kit off eBay, an absolute bargain at less than £25. The Factory are adamant that it is the Crank position sensor but have none in stock. My idea was to drive the car until it stopped then change the sensor at the side of the road as opposed to having to change the fuel pump. The sensor looks suspiciously like a Harley one, Anyone know? Thanks in advance.......

"The sensor looks suspiciously like a Harley one, Anyone know?"

The Harley sensors are shorter so will not fit....its a bespoke S&S part....

If it was a sudden engine cut then I would also agree to faulty crank sensor (which will also give symptoms of a faulty fuel pump) but change the fuel pump regardless as it is worthwhile doing so.

I agree change the fuel pump or you will regret not doing so.

Thanks for that Stevo666

I had the same problem on and after replacing many parts it turned out to be the Crank Position Sensor. It is a different engine to yours but when I went to the agent of the engine to order the part he asked me for Euros200 but I bought the same part by the same manufacturer for euros40. Very often these sensors are used on different cars so it might be worth checking that. If I am not mistaken I think there is a thread with a list of parts on Talkmorgan where you can find the same replacement part and the car it is used on. I spent a lot of time and money to fix the fault but at least I now know my trike much better. Phase sensor faults could be intermittent and could prove very dangerous on the road

I have the same pressure testing kit, mine didn’t come with the right size Schraeder adaptor, did you manage to locate one?

If anyone has a source or a compatible alternative part for an X-Wedge Crank Position sensor then please let me know, as I have need of one.

Probably it’s the same one used by Harley Davidson. If you go on eBay I am sure you will find the required part

I would love to be proved wrong but I think in this case the CPS is unique to the X-Wedge. The Harley ones unfortunately won't fit because they are around 10mm too short. I'll start a new thread to see if we can track down an alternative.