Port intake on bicycle engine

[sisdavid]

I ported my intake, do not know if it will gain any performance, but that lip on the intake always aggravated me. so while I had the intake off replaceing the gasket I ported the intake, I did not cut into the metal deep just enough to get that lip off, and then slanted the rest to match the size of the engine intake hole, but not quite a lot removed the scuffing of the face of the intake manifold is so the RTV has something to hold on too, I was afraid that RTV was going to squish out, but it pretty much stayed put, anyone else ever mess with this RTV stuff? Can't wait for 24 hours to be up so I can test it out that is how long RTV dry.

YouTube - motorized bicycle

[Bikeguy Joe]

RTV, when applied correctly works great, you already know the key-use a thin layer and let it sit overnight.

[sisdavid]

Bike runs smoother now, unless it is wishful thinking, does seem smoother though.

[misteright1_99]

RTV and Threadlocker a must have....

[davidsis]

High temp RTV in my oppinion is best. Lock tite too, also if you grab a bolt with pliers and mess up the threads a little it will help keep it from viberating off.

[davidsis]

Okay, last night I opened the bike up for a prolonged period of time on A1A , Daytona Beach, motor bikers dream come true, and grinding that lip off of the intake did make a noticable improvement on the engine. Lot more torque too.

[Venice Motor Bikes]

Did you match port the exaust pipe too?
In my opinion, it's more important for top end speed than the intake.
It's way more important to make the ports in the manifolds MATCH the ports in the cylinder, not just open up the manifolds! This way the air flows smooth & faster...

[Goat Herder]

long time working on cars heres what u use on intake and all gaskets no more leaking period! high-temp red rtv silicone [gasket maker] Ive patched sub woofers when the foam rings blew out. this stuf has perfect headers on hot rods for years my moter has no leaks at all. I even put a perfect dab around the primer button on the carb, can still use the button I have picts coming by this weakend. thers a black version as well but not for high heat remmember [gasket maker] permatex

[Ghost0]

I have matched both intake and exhaust manifolds to match the ports. First I made a new gasket that perfectly matched the ports on the head. Then I used the gasket as a template to start grinding the intake and exhaust manifolds to match. Makes a big difference. I also got rid of any leftover welding that may be blocking the intake manifold where it makes its bend.

[misteright1_99]

I did my exhaust port today. I couldnt believe how "off" it was. I mean the gasket and pipe covered at least 20% of the port on the head. Tomorrow its onto the intake....