I am attempting a animal stroker build and hope this would be a good place to blab about the troubles I am having. I just have the short block assembled so far. I used a new old stock Minnesota Clements 3.636 rod on a rapIII crank and a 1982P140 piston. The piston now has .125 (1/8") popup! I don't think the piston should be cut down as the underside has a relief cut under it for the rods pin area and doing so would put a hole in the center of it LOL. At least the top ring is still in the cylinder at TDC. The block I am using is a WF block that I don't think has be decked.This has me stepping back from the idea as I don't really like the short rod to begin with yet I thought I would try and utilize some of the parts I have laying around collecting dust. Is this what you guys have to deal with when stroking the animal or is my rod just wrong or does the WF have a different deck height?[/
I know .100 is okay that extra .025 could be tricky.
JMO- scrap the animal idea. Sell it off, part it out, just get rid of it. For around $1000 you can go out shopping and find yourself a decent little 125 MX bike like a Honda CR or Kawi KX. Mount that motor on your kart and run it. For that matter, if you shop around, you could find a big 250 MX. With a 125 you would be looking at about 35-40 hp all day long on gas with virtually no maintenance throughout the season. AND maybe 200 to freshen it up in the winter. The 250 (2 strokes) are capable of 50-60 hp and will run all day long. Again with nearly 0 maintenance. Hardest part about racing one of those is the cajones to drive em.