Only just joined this forum hence the delayed response. If you are still wondering I can provide some feedback for you. My Venom came to me with one fitted. Initial problem was when being prepared for delivery to me the seller left it ticking over, it stalled and damaged the pinion. As kommando said there are some small resin pins that are designed to shear to avoid this, unfortunately they didn’t. A new pinion was sourced and all was well again (I now ensure it has a faster tick over to avoid stalling). Next issue was the resin shock absorber on the crankshaft, this split one day when I was out meaning a loss of drive from the starter. I got home ok though and when I contacted Alton they sent me an new design (a spring and large washer) that I fitted about a year ago and had no further problems. If you look back in fishtail a number of people have reported the starter has caused the flywheels to shift out of true due to the tremendous forces applied at start up. To avoid this I use the valve lifter and gently ease the engine over compression stroke. I then keep the valve lifter operated and use the starter to get the engine really spinning before releasing it. I have a Manual
advance so also retard about half way for starting as well as tickling the carb if cold. Thus far it works like a charm, much to the disappointment of the usual gathered crowd waiting to see me struggling to kick it into life. Hasn’t needed loads of attention or adjustment and as long as you are careful and fit a decent battery
I’m a strong supporter.