question on a gx140

[kayde]

Ok guys, this is the freebie gx i got from the scrap pile bronco.

Ive mostly played with tecs, and briggs engines. This is the first true honda ive had.
It was stuck when i first got it but a weekend of being filled with off road diesel didnt break it free so i opened it up.

With the side cover and head off it broke free easily.
And everything appears in good shape. Its amazing how little crud can stuck up a engine.

Now its time for a good cleaning and reassembly.

The one thing that im stumped on is with the chain driven reduction.

Is this desired on a cart or mini?

The output/pto is chewwed up pretty bad. I imagine i could weld it up and turn it true again but ordering a new one would be SO much easier.
Wheres the go too place to get such a item?

Without giving it a though i pulled the cam out just so it didnt fall out.

Is it just line up the dots and stuff it back in?

 

[landuse]

Pics?

 

[itsid]

unfortunately it's the direct 2:1 reduction...

means you do not have a clutch
(and worse, no ordinary clutch can be installed either since the shaft is turning only half the required speed to engage porperly)

In theory you could find a clutch with variable engagement speed-springs
(this is not too difficult really) but IDK if it'd be worth it just to install a smaller rear sprocket in the end.
(that is all the benefit you'll have with that reduction)

'sid

 

[mckutzy]

A straight redux sideplate motor isn't really a good as they won't be able to spin the clutch to proper operating rpm's...
To get a new shaft, side plate ect for this older motor... Might aswell as buy a new pred and go from there...

 

[65ShelbyClone]

The one thing that im stumped on is with the chain driven reduction.

Is this desired on a cart or mini?

Generally not. Some low-speed utility applications like cement mixers used them. Rental karts would use them with the integrated wet clutch for the purpose of not going fast.

The output/pto is chewwed up pretty bad. I imagine i could weld it up and turn it true again but ordering a new one would be SO much easier.
Wheres the go too place to get such a item?

Possibly a small engine parts outfit. Doubtful it would be cheap though. I would be inclined to find a regular crank and side cover.

GX140s share a lot with the GX160 and GX200, but some things about the 140 is screwy. They use a cast version of the 160 crank(which is forged), but with a smaller flywheel taper. The head will interchange with a 160, but has smaller valves, ports, and chamber. A 14cc GX200 head would give about 10:1 compression and likely raise the power peak to ~5800rpm. It also uses the same rod as a 160/200 so billet is an option.

Funny this should come up because I just found all the parts to put my GX140 back together.

Without giving it a though i pulled the cam out just so it didnt fall out.

Is it just line up the dots and stuff it back in?

Yep.

 

[kayde]

Thanks for all the info guys.

I cleaned it up and put it back together for now
Guess im gonna let this one stew on the bottom shelf for awhile till its destiny presents its self.