Is this a good ratio?

[Willisk2004]

I have a single seater heavy cart not sure what it was originally I’ll post pics but it’s been modified.
Has locked mower diff.
440cc duromax with governor
60 tooth axle sprocket and
10 tooth jack shaft sprocket!

mid this the optimal ratio for torque? I believe it’s like 6.0

 

[JTSpeedDemon]

We need the tooth counts for all of the sprockets (both jackshaft ones, torque converter/clutch) and the tire diameter.

 

[Willisk2004]

There are only two sprockets the jackshaft off the driven and the sprocket! Tire size is 22/11/8

 

[landuse]

Unless I missed something....all you gave us was the tyre height?

 

[itsid]

6:1 on 22" tyres is a bit of a stretch to say the least...
kart doesn't look too lightweight either..
then again that's a 13horse, right?

might actually work for a total weight of less than 500lbs (kart+rider)

'sid

PS that's not a mower diff.. that is a kart diff (Comet SCD-1) highly thoughtafter diff to be precise no longer in production
if you locked it yourself you burned a lot of money

 

[Willisk2004]

No it was already locked, unless it disengages at a certain speed or in corners maybe. It does seem since I lived everything up real good like its turning easier but still spins both when I’ve had it jacked up. The first time I tried to drive it needed a football field to turn lol just kept pushing the front tires. it’s a 18 horse 440 cc . Anyway to unlock it ? Currently it has torque for days and pretty quick to. What would be an ideal ratio? Again it’s 10 tooth on the jack shaft and 60 tooth on axle with 22x11x8. Thank y’all for the responses

6:1 on 22" tyres is a bit of a stretch to say the least...
kart doesn't look too lightweight either..
then again that's a 13horse, right?

might actually work for a total weight of less than 500lbs (kart+rider)

'sid

PS that's not a mower diff.. that is a kart diff (Comet SCD-1) highly thoughtafter diff to be precise no longer in production
if you locked it yourself you burned a lot of money

Any idea what this kart started life as?

 

[itsid]

not really,
reminds me of a KenBar DD9 or rather looks like the single seated version of a KenBar D690
so it might be a close relative or just something that looks close enough for me *shrugs*

'sid

 

[Willisk2004]

Thanks! I have spent hours scouring the google images and and can’t seem to find any thing identical. I do believe by the different welds that it has been modified, maybe two karts made into one. At least the work was done right and welds are good. I paid $50 for the kart with a blown engine so I can’t complain

 

[Hellion]

I have spent hours scouring the google images and and can’t seem to find any thing identical.

Couldn't resist helping identify this old kart from this old dead thread. Side-view photos are king and since none were provided, I am fairly convinced it might be a Ken-Bar Sand Dog model SD-8E (black only) or model SD-9E (red only). The OP's kart looks repainted but cannot tell for certain. The only differences between these two models are colors and the original engine horsepower rating, 8 for 8 HP and 9 for 9 HP. "E" for electric start with key.

Roughly 1990s time frame give or take. See this thread for the 1992 catalog images:

Ken-Bar Fun Karts

A Ken-Bar Recreation Equipment Fun Karts info-dump. The following is a 1986 full color Ken-Bar tri-fold brochure I found on Fleabay that I have scanned and then another 1992 brochure whose images were stolen off the web. Some later product images follow. The cover kart seems to be a KB-750-5...

www.diygokarts.com