Modern definition of Valve stem seals from all manufactures regarding todays high performance engines. Low friction and long term emissions control Valve stem seals provide a defined metering rate of oil to the valve stem interface of internal combustion engines to lubricate the valve guide and mini...

Revisiting the valve guide seal posts for the Square 4,this process is not rocket science but does take a good hand in the machine shop.No need to buy those special tools.I used a small boring head in the mill and grind my cutters to suit the need. One tool cuts the diameter and also the depth neede...

I do believe they will fit in the space,I would have to do some research on that.
Mike

uhhh forward ???.No pun intended.We have an in house dyno which will report air fuel ratios.I will post results when we are finished with my digital engine control distributor.This gives precise total control over all RPM and load conditions.As close as you can get to fuel injected performance.New l...

I am always looking for better performance,my Mark ll came with an Amal carb which after tuning motorcycles for many years fell a little short of my expectations.Since owning a V Twin performance shop I have an abundance of used 38 mm Keihin butterfly carburetors.Decided to upgrade and replace the A...

I thought the wooden gate handling was pretty a pretty good reply.Thanks for the smile.As for leaping into something without any thought Idont do that.To decide to use the wood dowel rod to aid in engine install I studied the head around top exhaust studs that would carry the weight.Plenty of meat t...

After removing engine for overhaul ( by the manhandling method ) I looked for a more friendly way two people could reinstall it in a more controlled way.This is how we handled the engine and it went in without a hitch.
Mike

Having been building V Twin motorcycle engines for over 50 years this is the first Square 4 engine/restoration project.I read alot about broken rings,screwdrivers and picks poking rings in place etc.Must be a better way since I prefer to work alone to keep distractions from showing up.As seen in the...

con rods I have just installed a set that I purchased from Bennet Longman at Iron horse spares UK.The rods are made by R&R rods in Florida USA.Excellent examples and completely satisfied.I have a set of stock rods with shells that have 3500 miles on them if interested.There was no reason I chang...

Thanks to Bruce Longmans article publishing the lobe center angle ( LCA ) for the Square 4 it makes it so much easier to dial the cam in.I would like to share a way we do it on big inch V 8 Chevrolet engines for drag cars and adapted to this particular issue.If anyone would like I will send sketches...