750 Twin Flywheel: 7mm bolt hole?

I am thinking of building a tool to let me hold the flywheel on my 1979 KZ750 B4 to loosen the shaft bolt.

There are two holes in the flywheel rim. Are they 7mm holes? Any place to get bolts that fit these?

Another question: the manual says to torque the shaft bolt to about 100 ft-lbs..... is that for real? That sounds like a bunch.

BTW: do you normally use blue loctite on that bolt just to make sure it doesn't wander out?

thanks

Check with www.z1enterprises.com they might have a special tool. As for retaining the bolt,Blue Loctite #242 should work well. The Red Loctite #222 takes about 400 F to loosen it's grip and this heat may damage the magnets on the flywheel.

Thanks.

The manual doesn't specify any threadlocker on the shaft bolt, but I don't think I could sleep without it.:laugh: BIG problem if that thing gets loose.....

if you have an impact gun you normally can remove the nut just holding the rotor with your hand.

I don't have an impact gun.

Or, an assistant.:laugh:

sorry about that didn't realize you were air tool challanged, motion pro makes a really good tool for that and you can also use them on clutch baskets. the motion pro number is 08-0008 they look like over sized vice grips and they work very well it is a good investment.

timebomb33 wrote:

sorry about that didn't realize you were air tool challanged, motion pro makes a really good tool for that and you can also use them on clutch baskets. the motion pro number is 08-0008 they look like over sized vice grips and they work very well it is a good investment.

I have seen those, but I couldn't figure out how they could work with my flywheel which has a smooth outer surface. There are no slots for the tool to grab onto.

I have seen some rubber strap wrap tools that might work?

You should be able to put the bike in gear and with the front tire against a wall, be able to remove/tighten the bolt. If the bike moves, have some one apply the brakes.

MFolks wrote:

You should be able to put the bike in gear and with the front tire against a wall, be able to remove/tighten the bolt. If the bike moves, have some one apply the brakes.

That was my first thought, but I was afraid it would over stress the crank or the gears in the tranny when I twisted on it. The torque spec is 100 foot-lbs on that bolt.