whats the stroy on these motors do the perform better than a zenoah do they have more power or are they not that good[:? :dash:

They outperform a stock zenoah but are not as reliable. RCMK seems to be the best choice at this time IMO.

so they break down faster in other words

2 bolt cylinder does NOT hold cylinder in place well ...
Quality of the materials used is less than Zenoahs ...
If you do a SEARCH on line you will find volumes of information on this subject :?

Personally tried to get them too work out , could not and sold them off.

Have been using one for about 2 months, good results. As fast as mild mod zenoah, easily. Yes 2 bolt, but keep an eye on it and no problem.