Name this TC!

[Cyfun]

I picked up a pair of identical karts, and they have these sealed TC assemblies. I haven't found any identifying marks, so I can't look them up. I wanna do some maintenance on them, such as changing the oil, but I don't know what oil to use. Anyone recognize these?

 

[r97]

my gut says those are just reduction boxes, not tc's, anybody know for sure? if so youl need to get rid of them, or re-position them, or use a belt tensioner/ manual clutch., unless they have a clutch built into them

 

[Cyfun]

They do have automatic clutches within. That's why I thought they were TCs. I suppose they could just be reduction gears, cause it doesn't feel like it has a lot of power at low speeds, but once you hit about 10mph, it hauls *** up to 25mph. Maybe I should just crack one open and see.

 

[Bluethunder3320]

thats what i would do, knowing me

may need to make a new gasket though. ive never heard of a sealed torque converter before.

 

[anderkart]

What brand are those engines?

 

[jr dragster T]

Its a Honda 6:1 gear reduction box. Some have a built in wet clutch, some dont.

 

[Blazkowiez]

Dude, that looks like a 2:1 reduction box which can be very valuable for a kart. This is very very similar to what tracks run which may explain the dual belt drive. Also, if it were a 6:1 he wouldn't be able to get up to 25mph. Heh.

This is what a 6:1 typically looks like.

 

[GreyhoundOfYerfDogs]

Don't arbitrarily crack anything like that open without new gaskets at hand!

The belt drive is interesting; I wonder why they didn't use a chain. That could make small puddles a big problem. You could still adjust pulley sizes like sprockets for speed or torque if you were so inclined. Go up not down in size (drive or driven) to prevent increased slippage.

For wet clutches, you need special non-moly oil. Honda 4-stroke oil might be a safe bet if you can't find a spec for this unit. Your local motorcycle/powersports dealer should have it in different viscosities.

 

[Blazkowiez]

Don't arbitrarily crack anything like that open without new gaskets at hand!

The belt drive is interesting; I wonder why they didn't use a chain. That could make small puddles a big problem. You could still adjust pulley sizes like sprockets for speed or torque if you were so inclined. Go up not down in size (drive or driven) to prevent increased slippage.

For wet clutches, you need special non-moly oil. Honda 4-stroke oil might be a safe bet if you can't find a spec for this unit. Your local motorcycle/powersports dealer should have it in different viscosities.

Its a dual belt system from a track kart most likely..... it was very common on several different brands. There were no puddles on this application.

I'll tell you tomorrow what oil we were running for the track on all of the 2:1 reduction units on the Hondas mounted on our concession karts. The manual says regular 10w30 but for true longevity we varied very successfully.

 

[Cyfun]

What brand are those engines?

One's a Honda GX180, and the other is a Techumseh 6hp.

You're probably right about it being a 2:1 reducer. These were kiddie karts from an old local gokart track. Are they worth anything used? I wouldn't mind ditching them in favor of a TC cause these suck at climbing hills.

Of course I'm also entertaining the idea of swapping it all out for a Lifan 140cc with some gears.

 

[Blazkowiez]

You've stumbled upon a fantastic gearing system. I can't explain how awesome these systems are for their price and how long they last. Keep em, you can switch out gears if you need a different ratio for more torque.

Tell me, 22mm shaft?

 

[Cyfun]

That's cool. By switching gears, do you mean just changing my dual belt pulley sizes, or actually cracking the reducer open and putting different size gears in it?

 

[Blazkowiez]

That's cool. By switching gears, do you mean just changing my dual belt pulley sizes, or actually cracking the reducer open and putting different size gears in it?

If possible run 5w oil but 10w will do if you can't find it.

By changing gears I mean remove the pulley and put a sprocket on there. Don't crack that thing open unless it stops working.

 

[Bluethunder3320]

Don't crack that thing open unless it stops working.

i second that

 

[Blazkowiez]

If you do happen to destroy any internal parts, PM me. We have literally 11 engines with working 2:1 reduction units and a box 3x7' filled with internal parts taken off of the 100's of engines parted using these units over the decades they've been run.

 

[mejoesworld]

this thing is a stock honda reduction case
with a centrifugal clutch
ive been looking it up like crazy cuz i was given a go kart with this thing on it
but didnt have the drive belt
it has a clutch inside i've opened it already haha

http://engines.honda.com/pdf/manuals/37Z4F603.pdf
that's the link
its adobe format
but yeah i don't know if it's good or bad cuz i haven't got the kart goin but its in the manual just go to page 9 or 10