E50 case match

I thought with arrival of a new race crank and its perfectly timed perish of my stock crank I thought I'd case match the engine. So I practised on my original E50 before using my carrying it on the newer case!

So if you fancy a go just secure the engine in a vice or on a stable surface. Then offer the larger gasket mine is a 70cc to the head and mark up the showing case with a permanent marker

E50 case match II

The remove the Gasket to reveal the black marks and the metal which will need removing. The case will need grinding back to match up with the head and allow a greater air flow thus higher pressure! More pressure with a racing crank a 70cc head and a roller bearing should mean the good times rolling baby!

E50 Case match III

Once it's ground out, I used a Dremmel with a grinding wheel. Just shave the metal out, I choose to angle back the cut to to fade the grind to a taper. This should be fine, but we will see!

Changing of the guard

So after a week of the bike running it broke down again. The compression was mentally high around 170 the head was getting fuel and a great spark. So Cookson suggested the crank seals may have gone. They did look ropey so it was a great shout. De-mounted the engine and began work.

Changing of the guard II

When I got the clutch out I found that I now have a three shoe clutch wheel. Ace. Then came across the problem of moving the last bearing to change the bigger of three seals. After researching on Moped army’s wiki I found this picture of a car ball joint fork to pop them up. Also suggested using screwdrivers to force the situation if you haven't got access to a fork.

Changing of the guard III

So then the crank seals are all changed and now its running again. has 140 compression and starts on the first kick again. Saweeeeeeeeet MOFO's