Wheeler 2,275 Posted November 30, 2019 (edited) Seeing how I'm going to be pulling my motor & splitting cases, as I have to replace one side that's cracked. I"ve been thinking about what I'm going to do.... Do I tear it all apart, rebuild & leave the 355bbk alone or upgrade to a 380bbk & gain some power? Now would be the time if any... I'd love some feedback/advice/input good or bad, lets hear it... Edited November 30, 2019 by Wheeler Share this post Link to post Share on other sites
toodeep 1,705 Posted November 30, 2019 First question. Do you need that very little extra power? 1 Share this post Link to post Share on other sites
retro 3,745 Posted November 30, 2019 I would stay with the 355 and just freshen it up. Its proven to be reliable for one... secondly, you'd gain nothing by bumping to 380 unless you swapped on a custom highly ported head with very large valves and matched intake/exhaust. A Honda head casting on a 380 isn't cost-effective and won't make any power except right on the very bottom... low RPMs where potential for increases in torque output is minimal to start with. 1 Share this post Link to post Share on other sites
Mac102004 418 Posted November 30, 2019 I’d stick with the 355 or look at other big bore options, I would not buy a 380 kit personally. @_Randolph_ has one you can ask him about it. To be be perfectly honest I like the size of the 355 bore, I might consider a small stroker if it were me, +4mm maybe, That would be 376cc at your current bore. Or maybe a 350D crank and run a custom rod on it to fit your current top end. That would be around 368cc, small bump but good bang for your buck. 1 Share this post Link to post Share on other sites
Fishfiles 16,950 Posted November 30, 2019 I'd stay with a stock jug , so when a " oh no " happens , it is not as much of a waste of money to bring it back to life ---- put a load muffler on it and it will make your brain think your ragging it , LOL I have heard a theory that I have bought into , when you sleeve the jugs over size , you are making the aluminum part of the jug very thin , so it gets hotter , when you hit water it cools rapidly and causes problems like warpage that lead to a short life --- you might not ride water so you don't have that to worry about aspect 4 Share this post Link to post Share on other sites
Wheeler 2,275 Posted January 2, 2020 Well I decided to keep the 355bbk. HL doesn’t sell the kits or gaskets anymore. They gave me the part numbers & I ordered two gasket sets. tha is for ur input 3 Share this post Link to post Share on other sites
