Hi this is my first post!
SO I am fairly new to porting, I built a piston port 80cc which blew up (spun the bearing which in turn destroyed my piston and cylinder). I bought the cheapest cylinder, new piston, bearings, rings, slant head, reed valve, jets and a new sparkplug from Amazon and I am cracking my case today to clean out the residual bearings and such... I'll be balancing my crankshaft and planning down the mating surface while I'm at it. Parts won't be in until tomorrow and I'd like to port my engine for optimal performance at low rpms/climbing hills and was hoping someone could just give me some decent ballpark port durations for running a reed valved engine uphill, I've got a lot to do and I'm honestly just not trying to research and understand why exactly those port durations do what they do. I will be windowing the piston and I'm open to putting a trench/boost port in but I want to do this in under 6 hours as I am damn tired of working on the engine.
I'm going to be taking this baby on a road trip through the Appalachians (about 900 miles) in a week or two so not trying to do anything extreme or wonky which will make it unreliable.
Please limit answers to port duration suggestions as I already know it's not the best idea to go on a road trip that soon, I'm cold and the bike has been pretty damn reliable until the bearing finally gave out (modded too hard, I know what I did wrong and I don't wanna talk about it
) and I am heading for greener pastures.
If I don't get an answer soon I'll keep my durations and just do a little cleaning and up and widening of the ports, that got me 35 mph before and was great going uphill until the cataclysm.
Thank you!
SO I am fairly new to porting, I built a piston port 80cc which blew up (spun the bearing which in turn destroyed my piston and cylinder). I bought the cheapest cylinder, new piston, bearings, rings, slant head, reed valve, jets and a new sparkplug from Amazon and I am cracking my case today to clean out the residual bearings and such... I'll be balancing my crankshaft and planning down the mating surface while I'm at it. Parts won't be in until tomorrow and I'd like to port my engine for optimal performance at low rpms/climbing hills and was hoping someone could just give me some decent ballpark port durations for running a reed valved engine uphill, I've got a lot to do and I'm honestly just not trying to research and understand why exactly those port durations do what they do. I will be windowing the piston and I'm open to putting a trench/boost port in but I want to do this in under 6 hours as I am damn tired of working on the engine.
I'm going to be taking this baby on a road trip through the Appalachians (about 900 miles) in a week or two so not trying to do anything extreme or wonky which will make it unreliable.
Please limit answers to port duration suggestions as I already know it's not the best idea to go on a road trip that soon, I'm cold and the bike has been pretty damn reliable until the bearing finally gave out (modded too hard, I know what I did wrong and I don't wanna talk about it
) and I am heading for greener pastures.If I don't get an answer soon I'll keep my durations and just do a little cleaning and up and widening of the ports, that got me 35 mph before and was great going uphill until the cataclysm.
Thank you!
