I type everything a dozen times... Then fight the auto correct...
The phuckum 85... I have a thread about it...
This is the basics get a good wrist pin bearing good circlips saw piston big end bearing and tighten everything up with shims so there's no rocking or play in the rotating assembly... Then position the cylinder so the ring pins land between the intake and transfers... I'm thinking some locating pins so it doesn't move about... That's been the problem with it from the beginning the bushing would allow a pin to catch and the jugs aren't all the same and the YD100 bottom ends off as well... The 110 rod is all you need on a 100 crank... 100 is 40 stroke the 110 is 39.? Stroke...
The problem with the saw builds is a ms460 is a 38 stroke and the 40 causes the piston to travel just out of the bottom of the cylinder and it effects it by rocking or pinging so a 110 bottom is better for those... Adjust the squish by decking the case so you help support the piston... .5 mm here and there so there's no cross talk it's all about the intake... The p85 piston window or windows are problem one window would be the way to go... I'm going to cut the top off it and give it a LD 100 CNC head... Saw cylinder bolt spacing would fit the 110 case... I've got enough stuff to do a case reed saw build but I decided to go with a Polaris sportsman 90 cylinder and crank... 100 cc minereli and it's a 50mm bolt spacing so the LD head again... If you check out my post I have gotten everything together for a few different experimental builds... Clutch reeds... ignitions like a pw80 cdi and cr80 coil... I don't have a shop set up so everything is just waiting for that but someone that does... Could build and develop from those findings...
I've been hard into 2 stroke bikes outboards snowmobile
lawnmower saws... Snow king if you can find one is basically a 212 2 stroke for a snowblower... I found a few on ebay... Not everything is going to work but that's how it goes with experimental things... I fix things after everyone else has given up... Since about 1980... I did a gt5 Skyhawk in 2012 and was working on a that's DAX sx50 build what my place got shut down 2014-16 and moved to California... I got to know some of the east coast guys then I've done business with everyone at this point just catching up lately... Everyone is gone Pretty much so I figured I'd just buy up a bunch of stuff just as it's drying up... I don't sell anything or look to make money from it...
Back to the P85 I bought 7 cylinders when they were $50 each and the new ones are having some issues with the plating... Bicycle engine.com is totally crap and shouldn't even be in business selling lemonade let alone engines... They did everything to cheap fix things... But if you start from scratch and build from experience it's going to be another story... The other forum is proud they fixed the phantom... Working close to the seller... And there are some great progress there... I haven't put one together to show off how fast it goes for thousands of miles... I just know everything else I've worked on from experience and the basics don't change... And neither do the used tire salesman...
