downsize shaft
- Thread starter jayden727
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Any decent machinist can should be able to turn it down for you on a lathe and re-cut a keyway.
you'll have to remove it from your engine though.
The cheaper way out is to find a sprocket with a 1" bore and run a chain to a 3/4" jackshaft.
That just gave me a idea here but with this you would need a really reallly low idle. put a say 10 tooth 1 inch bore to a 12 tooth on a 3/4 jackshaft with a clutch on it that engages around 2000 rpm. with this hopefully you will be getting more RPM without increasing the engines RPMs! Would this work at all??
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Doc Sprocket
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Both answers are functional. But I gotta ask why you'd want to weaken your shaft??? 
Affair_driven
BULL DETECTOR
Yup...someone had to ask it.
anderkart
Moderator
(just in case your question was serious... 
They turn em down because clutches for 3/4" shafts are more commonly avalible, plus they usualy cost much less than 1" models.
They turn em down because clutches for 3/4" shafts are more commonly avalible, plus they usualy cost much less than 1" models.
born loser
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well, heres one way...
the bolt in the block acts like a rest for the file. This one came out perfect....
the bolt in the block acts like a rest for the file. This one came out perfect....
Affair_driven
BULL DETECTOR
Would be a lot cheaper to get a 1" bore clutch than to have a machine shop do it's thing.
born loser
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Not my idea, but it worked!
Ha! that's what I was going to mention next, I've done this.
The poorman's lathe lol!
The only drawback (if you don't mess up) is your file pretty well is rendered useless.
And you get to cut your own keyway!
If you need to cut a keyway the best way I found is clamping a strait piece of 1/4" stock centered on the shaft to use as a guide. Then layer up several of the thinist cutting wheels you can find on a dremel tool to get almost to the size keyway you need and cut through in multiple passed until you acheive the needed depth. Then use a square needle file on the keyway until your key fits snugly..... It's not perfect but will work in a pinch.
*remember the shaft is the size it is for a reason! The smaller you make it the more prone it is to warp and/or break!
The poorman's lathe lol!
The only drawback (if you don't mess up) is your file pretty well is rendered useless.
And you get to cut your own keyway!
If you need to cut a keyway the best way I found is clamping a strait piece of 1/4" stock centered on the shaft to use as a guide. Then layer up several of the thinist cutting wheels you can find on a dremel tool to get almost to the size keyway you need and cut through in multiple passed until you acheive the needed depth. Then use a square needle file on the keyway until your key fits snugly..... It's not perfect but will work in a pinch.
*remember the shaft is the size it is for a reason! The smaller you make it the more prone it is to warp and/or break!
kart mania
junior driver!!
(just in case your question was serious...
They turn em down because clutches for 3/4" shafts are more commonly avalible, plus they usualy cost much less than 1" models.
Doc Sprocket
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There's two minutes I'll never get back. Infuriating, isn't it Redsox?
devino246
Official DIYGK Chem Nerd
Blazkowiez
Kart Aficionado
We need more moderators!
Doc Sprocket
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Could it include a spelling test?
devino246
Official DIYGK Chem Nerd
Now theres an idea. Im not sure you can do that with vBulletin though
Blaz is right, we need more mods.- Status