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Old 06-07-2019, 10:48 AM
billdan billdan is offline
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Default Gear reduction removal

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??
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Old 06-07-2019, 01:36 PM
mckutzy mckutzy is online now
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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.
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Old 06-07-2019, 02:48 PM
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anickode anickode is online now
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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.
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Old 06-08-2019, 02:33 PM
Jhoppe Jhoppe is offline
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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?
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Old 06-08-2019, 03:24 PM
mckutzy mckutzy is online now
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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...
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Old 06-08-2019, 06:35 PM
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Quote:
Originally Posted by mckutzy View Post
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.
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Old 06-12-2019, 01:23 PM
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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.
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