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I've had an indicated 82mph downhill on the motorway

There is a ring on the crank which you have to take off, it's a reverse thread c-nut. If you are really sure everything is off then a rubber mallet and some welly is all i can suggest

I would check the HT is actually on properly, check the connections of the coil to the loom as this has caused problems for me before. See if the CDI is plugged in properly and maybe give the plug a clean or replace as thats only a couple of pennies. A full service at a time like this is a good idea so atleast you know everything is as it should be, then you can start problem solving

Right If you've read posts I've done before you will know the storey of my agility. Essentially it is now running extremely lean and the exhaust gas is burning to touch. The compression is absolutely fine as I've swapped over the piston and bore from my old engine which ran perfectly until the crank splines went. I've also got my old cylinder head so essentially the top end is how it used to be. I had my old carb on it and it ran really lean though, cleaned and everything it still ran lean. Now i've swapped over to my spare carb which is also completely clean and it still runs lean. I've got a fresh fuel filter and there are no leaks on the vacuum lines or the air intake. Timing is all correct so I'm wondering if anyone has any ideas. I've got a 120# jet on order just to temporarily solve the problem. I'm beginning to suspect the fuel pump on the tank as the fuel filter is a clear one and only rides half full of fuel. I'll post a video later on today of it. There is plenty of power low down though. There is just none in the high rev range when moving although it revs freely to high revs when on the stand. Engine runs insanely hot though so i can only test it for a while at a time.

Any idea of help would be greatly appreciated.

Gray

I would be very careful when ordering a stroker crank. Unlike many other GY6 engines the bearings which sit on the crank are different sizes. If my memory serves me correctly the right bearing is substantially bigger than the left one. I used a donor crank from a normal GY6 and found out the hard way that this was the case.

Also if you do split the case I'd like to know where you get your gaskets from. There are many parts I need here in the UK but the dealers are insanely expensive.

Gray

My scooter massively lacks performance even with a new plug and a totally cleaned out carb. I've got a fuel filter, air filter, drive belt and dr pulley 13g rollers on order. Also will do the valve adjustments while i'm at it. Could the valve adjustment be the reason I'm running lean?

I thought my bike was getting shocking fuel consumption and realised after doing 30km and going through a whole tank, that my tank had a hole  It around the weld where the fuel tap comes off. Just wondering what product would be best to seal this back up as there seems to be a real problem. I can't have it leaking everytime i go out, with no fuel to go home and with prices here in the UK at £1.20 a litre its costing as much as my land rover to run.

Also while your here. Just wondering how I should paint my exhaust. I've wire brushed it soooo many times and painted it with high temp paint but the rust never fails to get beneath the surface and come through as soon as we have a damp day. Particularly the downpipe goes through paint like I'm currently going through fuel

TIA guys

243 or 270 on stuff I'm never going to change again, but I never use that on my bike, only the car