g2 primary sheave

svmoore · 11-08-2009, 06:48 PM

searched and couldnt find anything that matched on here. attempting to break down the motor for a possible rebuild, but having issues removing the primary sheave (on the shaft, closest to the motor). i tried used a pulley puller, this didnt work...neither did using a hammer. we eventually ended up breaking the sheave itself which is ok since i can set one up on the lathe or just buy new.

but still, i cant remove the sheave itself to get to the crankcase cover to investigate further on rebuilding the motor.

any helpful tips on removing the sheave? is the shaft and primary sheave all one? thanks

TheNewGuy · 11-08-2009, 07:22 PM

You need a clutch puller. > http://www.cartpartsplus.com/yamaha-...ch-puller.html

svmoore · 11-08-2009, 07:34 PM

Quote:

Originally Posted by TheNewGuy

You need a clutch puller. > http://www.cartpartsplus.com/yamaha-...ch-puller.html

im still waiting on my manual to come in. any clue on how this bolt works? may be a stupid question to some.

TheNewGuy · 11-08-2009, 08:23 PM

The shaft end of the primary sheave has ID threads, the bolt uses those threads as you tighten to put pressure on the crankshaft and pop the sheave off. The crank shaft is short.

svmoore · 11-08-2009, 08:30 PM

got it. i appreciate the help and will proceed to buy a bolt puller.

toadady · 11-08-2009, 09:30 PM

can someone tell us what thread pitch the bolt is, then a person with a lathe can make one.

igolf4fun · 02-14-2012, 08:25 PM

how about total length think that you can buy 3/4 inch screw with identical thread count along with steel bar...anyone have any DIY advice w/o buying the $40 tool for one-time use?

toadady · 02-16-2012, 02:21 PM

ya, just buy the tool and save yourself the headaches, this sucker is on there good, it's a tapered shaft,which means it's gona be suck on good.

sho305 · 02-16-2012, 07:32 PM

I had a machinist make one for me, but wonder where I put the print lol. The thread is metric. He used hex rod and left that for the head, it works like a charm. You can never touch the rest of the clutch to get them off, same for secondaries except those you can get off with a 3lb and hunk of 3/4 rod. Anyway, I found all the measurements on the net someplace. You can use a metric bolt and make the rod. I can look for the print but odds of finding it may be slim that was couple years back.

I think he used 3/4 hex stock and left about 1" for a head which was handy to use.

11-08-2009, 06:48 PM	#1
svmoore Gone Wild Join Date: Nov 2009 Location: Kentucky Posts: 287	g2 primary sheave searched and couldnt find anything that matched on here. attempting to break down the motor for a possible rebuild, but having issues removing the primary sheave (on the shaft, closest to the motor). i tried used a pulley puller, this didnt work...neither did using a hammer. we eventually ended up breaking the sheave itself which is ok since i can set one up on the lathe or just buy new. but still, i cant remove the sheave itself to get to the crankcase cover to investigate further on rebuilding the motor. any helpful tips on removing the sheave? is the shaft and primary sheave all one? thanks

11-08-2009, 07:22 PM	#2
TheNewGuy Admin/Moderator Join Date: Dec 2006 Location: Ohio Posts: 18,135	Re: g2 primary sheave You need a clutch puller. > http://www.cartpartsplus.com/yamaha-...ch-puller.html
	Ron PLEASE VISIT Our Sponsors * BGW GEAR The Store The G2 Project * Swing Arm Drop & Repair * Geep1 Project

11-08-2009, 08:23 PM	#4
TheNewGuy Admin/Moderator Join Date: Dec 2006 Location: Ohio Posts: 18,135	Re: g2 primary sheave The shaft end of the primary sheave has ID threads, the bolt uses those threads as you tighten to put pressure on the crankshaft and pop the sheave off. The crank shaft is short.
	Ron PLEASE VISIT Our Sponsors * BGW GEAR The Store The G2 Project * Swing Arm Drop & Repair * Geep1 Project

11-08-2009, 08:30 PM	#5
svmoore Gone Wild Join Date: Nov 2009 Location: Kentucky Posts: 287	Re: g2 primary sheave got it. i appreciate the help and will proceed to buy a bolt puller.

11-08-2009, 09:30 PM	#6
toadady Gone Wild Join Date: Jun 2009 Location: ozarks Posts: 237	Re: g2 primary sheave can someone tell us what thread pitch the bolt is, then a person with a lathe can make one.

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02-14-2012, 08:25 PM	#7
igolf4fun Not Yet Wild Join Date: Dec 2011 Posts: 3	Re: g2 primary sheave how about total length think that you can buy 3/4 inch screw with identical thread count along with steel bar...anyone have any DIY advice w/o buying the $40 tool for one-time use?
igolf4fun Not Yet Wild Join Date: Dec 2011 Posts: 3

02-16-2012, 02:21 PM	#8
toadady Gone Wild Join Date: Jun 2009 Location: ozarks Posts: 237	Re: g2 primary sheave ya, just buy the tool and save yourself the headaches, this sucker is on there good, it's a tapered shaft,which means it's gona be suck on good.

02-16-2012, 07:32 PM	#9
sho305 Vegas modded 420 Join Date: Jun 2009 Location: West MI Posts: 15,448	Re: g2 primary sheave I had a machinist make one for me, but wonder where I put the print lol. The thread is metric. He used hex rod and left that for the head, it works like a charm. You can never touch the rest of the clutch to get them off, same for secondaries except those you can get off with a 3lb and hunk of 3/4 rod. Anyway, I found all the measurements on the net someplace. You can use a metric bolt and make the rod. I can look for the print but odds of finding it may be slim that was couple years back. I think he used 3/4 hex stock and left about 1" for a head which was handy to use.

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