Changing Rotax Drive Gear?

Rob Hogenmiller · Joined: 20 Jul 2001 Posts: 855

What size socket is require to change the Rotax drive gear. I'm guessing 36-38mm, but don't have a measuring tape that short to fit in the housing.

phil feigel · Guest

yes what is the best way to tighten the the nut a friend of mine broke one of the pins for the shoe,removing the nut no problem,but to tighten it we do not want to use the piston stop no why man,thanks for any help

Nick Weil · Posted: Wed Aug 14, 2002 8:52 pm Post subject: Changing Rotax Drive Gear?

Clutch drums retail for $48 and the gears are about $40. That's $88 for each different set up. I would hardly call that cheap... Especially when we run 12T, 13T, 15T and 16T at all of our different tracks.

Nick

[ August 14, 2002: Message edited by: Nick Weil ]

Nick Weil · Posted: Wed Aug 14, 2002 8:57 pm Post subject: Changing Rotax Drive Gear?

Phil and anyone else interested:

I feel the same way regarding the piston stop. Some people say the piston stop won't hurt anything, others say it will. I am of the school that I would hate to find out that the anti-piston stop people are right.

So...

I have designed a tool that replaces both the piston stop ($53) from Bombardier-Rotax, as well as the vise mounted clutch tool ($27). It acts as a positive stop for the clutch drum or the flywheel while on the motor without stress on crank, piston, etc. And it doubles as an engine spocket removal tool.

Anyone interested can e-mail me...

nweil@cfl.rr.com

Nick

Nick Weil · Posted: Wed Aug 14, 2002 10:01 pm Post subject: Changing Rotax Drive Gear?

Rob,

I use a 3/4" drive 1-1/2" socket from Craftsman. It fits snug and I have had no problems yet. You will also want to buy the 1/2" drive to 3/4" drive adapter for your ratchet.

I have to change three karts gears on an almost weekly basis, as we go from sprint track to autocross and then to long track racing regularly.

Nick

Michael Horley · Posted: Wed Aug 14, 2002 10:18 pm Post subject: Changing Rotax Drive Gear?

Why dont you just buy extra clutch drums complete with sprockets? The drums are cheap enough.

George Jounakos · Posted: Wed Aug 14, 2002 10:22 pm Post subject: Changing Rotax Drive Gear?

Nick,
What is the best way to loosen then crank nut? Piston stop or using something to lock the starter gear?

Stephen Buckley · Joined: 18 Jul 2001 Posts: 861

Ditto on what Michael said!!! It's soooooooo much easier and it's cheap. Without a vise, loosening that big ole nut is a bear! Oh, by the way, even though there's a slot to put a screwdriver into to hold the crank, the surrounding aluminum casing will break right off. Beware!

Rob Hogenmiller · Joined: 20 Jul 2001 Posts: 855

Thanks for all the replies. Got my buddies gear changed out, thanks to the replies.

Seems like Rotax could easily redesign the clutch housing or whatever you call it so the process would be MUCH quicker. Sounds like a GREAT aftermarket product.

Keith Smith · Joined: 11 Jul 2002 Posts: 24 Location: Chico, Ca

To remove the crank nut to get the drum off, use the post sticking out at the back side of the motor right next to the flywheel gear. I use a screwdriver between the post and flywheel gear to keep the motor from turning. Works great, and fast too. Rotax makes a tool that holds the drum to remove the gear nut. Check it out. I got mine from Netkarts.com

Chad Stapleton · Joined: 19 Jul 2001 Posts: 4403

quote:
Originally posted by Nick Weil:
Clutch drums retail for $48 and the gears are about $40. That's $88 for each different set up. I would hardly call that cheap... Especially when we run 12T, 13T, 15T and 16T at all of our different tracks.

Nick

[ August 14, 2002: Message edited by: Nick Weil ]

Old subject but;--
in europe etc , these items cost (in your $$'s) less than $25 each. !!

Michael Horley · Posted: Mon Aug 19, 2002 12:25 pm Post subject: Changing Rotax Drive Gear?

quote:
Originally posted by Nick Weil:
Clutch drums retail for $48 and the gears are about $40. That's $88 for each different set up. I would hardly call that cheap... Especially when we run 12T, 13T, 15T and 16T at all of our different tracks.

Nick

[ August 14, 2002: Message edited by: Nick Weil ]

The clutch drums are nowhere near that here and you have already got the sprockets anyway.

Mary-Ann Horley · Posted: Mon Aug 19, 2002 12:42 pm Post subject: Changing Rotax Drive Gear?

I was just gonna say... I hope to god the drums and gears aren't that much here or I owe Laurey more than I thought!

Michael Horley · Posted: Mon Aug 19, 2002 12:46 pm Post subject: Changing Rotax Drive Gear?

I think they are about £16 but you jave the price list I believe.

ps. I need a driver for sunday!

Mary-Ann Horley · Posted: Mon Aug 19, 2002 1:27 pm Post subject: Changing Rotax Drive Gear?

L only has a National C license!