!910 Engine Boost?

[wyatt emp]

I will, and I do feel better now. I was actualy wondering about the valve spring as I saw a vidio on Yutube, where a guy named Indian Jeff had a 1912 with simular engine, where he added another spring to the one already there, I assumed to add tension. He did have the two speed rear hub but he was on the freeway with his.

[c.o.]

Well that didn't take very long! As usual Tommo comes to the rescue! If you give this a try Wyatt, please report back. My bet is Tommo knows what he's talking about! It would be interesting to hear whether or not this cures your driveway woes........

[Tommo]

Wyatt,
I've played with a few automatic inlet valve machines over the years and so long as the carb and manifold is free of air leaks, the only way I've found to increase perfomance is to play around with the inlet valve spring tension.
Don't do it by streching or squashing the spring just start by putting a shim washer under the spring to increase the spring tension a bit and go for a ride to see if it's better or worse.
If you have to decrease the tension to get any benefit in performance I'd reccomend getting a spring wound and try playing with that.
Modern electronic kitchen scales are ideal to see what your opening pressure is. Just push the end of the valve stem down on the scales and see at what pressure the valve opens at. It will be in ounces not pounds and a very small alteration either way on tension will have a significant effect on performance.

[c.o.]

Hmmm....... Oh well. New to this forum and was just hoping for some usefull information . My bad.

Wyatt, there is plenty of sarcasm floating around here but if your patient "useful" information may show up!!! Welcome aboard!

[c.o.]

Jet fuel is kerosene. It won't work.

Aviation fuel works just dandy... When I was a youngster I had a friend with a beater dirt bike. He was tired of all the other kids blowing his doors off on their new machines so we doubled down to where his uncle's float plane was docked on the river. He helped himself to some high test and we went to challenge the gloating winners. It was quite a sight as we passed them like they were parked!!! It worked great until the engine seized...........

[wyatt emp]

Hmmm....... Oh well. New to this forum and was just hoping for some usefull information . My bad.

[Chris Haynes]

Maybe I'll try some Hemi or jet fuel.......... Thanks.

Jet fuel is kerosene. It won't work.

[wyatt emp]

Maybe I'll try some Hemi or rocket fuel.......... Thanks.

[Chris Haynes]

S&S Big Bore kit? Avgas? Turbocharger?

[wyatt emp]

That's OK. I get the humor. Problem is it's a 1910 single that does not use a rocker. It sucks, litteraly!!!!! Intake valve opens from piston suction on down stroke.

[rwm]

lift one leg up push other leg down repeat as needed. sorry but it's a slow day in the office. can you change the motor pulley at the bottom of the hill.ask joe to make one of his new rocker towes for you.the change your rocker ratio.i think he gets a little more lift out of it

[wyatt emp]

Single

It's a single. Same thig for it, and if so waht type of carb?

[Chris Haynes]

SLOJO gor better performance from his early twin by, among other things, mounting a larger carburetor and intake. Still looks like stock. As long as it is a rider and not a showpiece I am sure no one will notice.

[wyatt emp]

Was hoping for something a little more technical............

[rwm]

pedal harder