Porting opinions and types

[BansheeDFW]

I just removed my cylinders off my shee. I have another thread on piston rotational play. After removing my cylinders I found the problem was due to rod main bearings. I also found my crank is starting to seperate. So I'm looking at my rebuild options right now. Im thinking of picking up a used stock stroke hot rods crank from a user here and going back together as a 370cc. But would really like to go the +4 421 serval route. I want some opinions on my porting now. It looks a little rough but this bike ran extremely well for a 370cc. Can anyone tell what type of port it is by looking at it? Dune, Trail etc? Also is there room to port for a +4 long rod stroke? Bore is .080 over (66mm) now. I'm wondering if since I need a crank, if I can go with a +4 long rod now. Have my stock cylinders ported to match and then step up to the serval cylinders in 68mm later. Basically do the build in stages. Anyway opinions and port type of my current cylinders will help.

 

Cylinders

[camatv]

i cant see the pics. i'll say this.

 

with the cyls being that far over unless they have aperfect bore on them i'd seriously look into replacing them, serval, stocker low bore whatever.

 

the bottom end. if it was me you would need the welded crank, TZ drive bearing, a billet clutch basket with a GOOD backing plate ( matton) HD clutch, and transmission mods. then the bottom end would be pretty well built if you were going to go serval i'd just do it all at one time and save the $$$ to do it right one time. the cylinder would be best to be port matched to the cases at the time of the rebuild you probably have other bits and piece worn out inside also.

[BansheeDFW]

Ok try the link now. Ok cam I understand that. I am going to buy a used stock stroke hot rods crank from here and have it trued and welded. That will keep me from feeling like i am wasting money on a new crank I don't want. I still need to sink some more money in intakes, reeds cages, carbs, and head anyway. I have a full hinson clutch now. I'll go through another season and then do a full build on a serval. Also do you know the difference between the serval cat and serval cub?