Gear reduction removal

[billdan]

I have a Honda GX340 horizontal shaft motor off of a pressure washer. It has a gear reduction box built on the side from the factory. I believe it is 2:1. Can I remove this box and get rid of the gear reduction??

 

[mckutzy]

hello and wellcome
Lets see some pic of this motor and how it is setup...

Some Redux are a bolt on.. others are part of the engine, and need new crank, sideplate and potentially other things.

 

[anickode]

And some of the bolt-on ones mate to an engine with a stub shaft, which is nearly useless for a kart, so again, new crankshaft.

 

[Jhoppe]

Correct me if I am wrong, which is entirely possible, could you not use a jackshaft to undo the reduction? If he can't get the reduction box of easily? Or even use a smaller rear sprocket to compensate?

 

[mckutzy]

Depends on the redux...
If is a wet clutch it can be compensated for in the gearing... if it is geared.... then no... as there isnt a clutch able to mount due to low rpm's...

 

[anickode]

Depends on the redux...
If is a wet clutch it can be compensated for in the gearing... if it is geared.... then no... as there isnt a clutch able to mount due to low rpm's...

If it's geared, you *could* use a jackshaft with fixed sprockets to double the speed, then run the clutch of your choice off that, but it would make things more complicated, bulky, and expensive.

Is your GX340 a true 340 (337 cc) or is it a detuned 390? (That's what the newer ones are) You'll need to know in the event you have to buy a crankshaft. It'll be cast into the block on the side.

 

[65ShelbyClone]

The crank is most likely short and splined if the reduction box has no clutch.

If the spline is by some chance 25mm x 13, then a wide range of motorcycle sprockets would slip onto it.