June 6, 201511 yr Author Compression is 155 psi. I measured the stroke. Beta USA was also nice enough to confirm with the factory before I did the swap. On some official Beta publications, the bore/ stroke numbers are misstated for the 200. (maybe from 2008) Working out the numbers shows that they do not equal 200. That had me confused for a while.
June 27, 201511 yr Author I have found a couple of advance curves on line for trials bikes, one for Beta and one for Sherco. They show curves like a 4 stroke so I guess mine should have something similar. I could not find a Beta OEM CDI online but did find an aftermarket one. They could not tell me what type of curve it has but I ordered one anyway and will see what happens. http://www.leonelli.com/english/028%20CDI%20DIGITAL/028%20INGLES/028%20VOK.E-ING.pdf
July 6, 201511 yr Author The aftermarket one is a combo CDI/ coil but has the same lack of a curve. The Beta CDI has 4 wires vs the 6 wires I have seen on a diagram listed by Dan W. There is one two pin connector and two seperate wires, one of which looks like the kill button connection. Edited July 6, 201511 yr by mcman56
July 14, 201511 yr Did you get this sorted using the other cdi/coil ? Would be interested at doing the same thing as think my cdi is dead. Can you tell me where you purchased this from ?
July 16, 201511 yr Author The other CDI has no curve and the bike runs the same. I still do not know if the OEM CDI should have a curve or not. The aftermarket was on: http://www.regulatorrectifier.com/catalog/20032008-Beta-250-Rev-3-CDI-Unit-1
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