6.5 tec

[Fullmetal]

ive been looking at the 6.5 hp tecumseh motor in my kart i have some questions plz try to answer them all

1. can this motor be built like the race go kart motors

2. the chain drive should the gears be more teeth on both or is their so ratio that is perfect on and off road

3.is their upgrades for cam and exhaust or can i just make a exhaust

 

[Bluethunder3320]

im not sure on the available parts for it, but google a billet rod for a tecumseh 6.5.

that is what i would start with, and then remove the governor, and upgrade to an adjustable carb. make or buy a straight exhaust pipe, and upgrade the air filter.

you can keep upgrading everything as far as i know.

 

[Bluethunder3320]

for a ratio, what top speed do you want to get? with what size rear wheels? (diameter)

 

[Doc Sprocket]

I'm sorry, I completely do not understand question #2. One more time, in English?

 

[Fullmetal]

i was looking at stuff for the gx200 motors but i dont think any of that stuff would fit what did the gx200 motors come on just the go karts

as to ? 2 im talking about the clutch gear teeth and the drive gear teeth how many teeth for a good road speed as in 25+ and good speed on dirt to sling mud

 

[Bluethunder3320]

air filters might fit, not much more though. (from gx200)

and for the gear ratio, how many teeth on your clutch right now, how many on rear sprocket, and how big is your rear wheel in inches, diameter?

 

[Fullmetal]

its not a chain its belt and its all stock

 

[slideways]

They never did much with the OHH's as race engines. Mostly because Briggs had the market covered and they weren't big enough to build massive open motors out of. They are also prone to rod failure but a billet rod would solve that.
As a guy who used these as a kid and did everything imaginable to them i'll tell you the most you will want to do is make an intake for it out of a piece of PVC, drill the jet one size bigger and make a curved/longer header for it. Make sure you brace the header well because the heads strip out very easily. This should give you about 7hp or a little more and you won't have to get into the internals. You can also set your valve lash a little tighter.

If you don't know about engines than i wouldn't mess with anything that is working as it is though.

 

[Fullmetal]

i was using a ratio cal online and it says if i use a 12 tooth clutch with a 48 tooth sprocket it will go 60 mph me i think their is no way in hell that will go 60 mph but i have never messed with these thing


as far as the mods i will do that till i can get something bigger and better

 

[IrrgaLuke24]

There is a billet rod made by ARC racing that costs $60. I recomend getting that. i bought one for my OHH and it helped a lot.

 

[Bluethunder3320]

you wont go 60mph. thats like starting off in a manual car in 5th gear.