tuned

I know it has to do with rpm, cam duration, lift, timing & a bunch of other numbers I don't really understand too well. If I'm building for a 7,500 max rpm target with a hemi-predator, does anyone know what length I need for a pipe which will provide some scavenging? Thinking it would be made...

https://www.youtube.com/watch?v=SzT5ElQu7MI I guys I'm new. I've been working on this motor since this spring. Just now getting it tuned and running. I use this as my outboard motor for my boat. It's a Predator 212 motor. I hit 6360 RPM, and the billet connecting rod and billet flywheel kept...

Looking for a tuned exhaust pipe for a 1971 Arctic Cat Climber. Looks like this: Mike

Interesting to know if any of you have played around with tuning the exhaust lengths for your Tec engines (in particular the HS50) and what other modifications you are running, mild or wild. I'm building an HSSK50 engine ... Modified ports and manifold -.020" off the head Tec carb usual...

been working on the flee, I wanted a pipe for it and found one off some sort of pocket bike that seemed like it would be the easiest to modify for this bike so I bought it, actually had to have it shipped from England which cost more than the pipe did :doah: So today I started...

i have a briggs 5hp with a techumseh carb off an HS40 motor, it has a 6" pipe with a standard briggs sausage muffler on the end, i dont know if im running lean, or rich, it seems if i turn the screw 1 turn in or out, it dosent do anything, when i hit the throttle, it had a delay till it...

I've tuned my carb to what I believe is correct. I got a good plug reading, I hear no backfiring, and it runs fine. How can I be sure that it is tuned to the best possible? Any tips from people who are good at it?