03 motor/piston question

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viclioce
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Location: Santa Fe, NM
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03 motor/piston question

Post by viclioce »

It’s said use a Road Toad crank with a 94/95/97 rod & a 97 piston. Can’t you use an 03 crank with a 94/95/97 rod & a 97 piston? Since both cranks have the starter gear, why is it necessary to use a Toad crank if you just change the rod & piston? Just asking for clarification. :ugeek: Victor

1978 175SL
1976 03 Wombat
1975 Road Toad 2
1974 98 Super Rat
1974 97 Super Combat
1973 96 Dirt Squirt 2
1973 Wombat Combat
1973 Combat Wombat
1972 94 Wombat
1972 Super Squirt
1971 92B+ Ace
1970 92B Ace 100B 2
1968 92 Ace 100
1966 Ace 90
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gearyoliver
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Location: Grand Coulee WA
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Re: 03 motor/piston question

Post by gearyoliver »

Don't have the answer but here is a pic of an 03 crank on the left and a Toad crank on the right.
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IMG_20200225_205418.jpg
dcooke007
Posts: 479
Joined: Fri Aug 23, 2013 1:11 pm

Re: 03 motor/piston question

Post by dcooke007 »

The crank pin on the 03 wombat is larger diameter than the crank pin on the Road Toad. The Road Toad and early 125's crank pin diameter are the same allows swapping the early 125 rod for the Road Toad's.

Danny
dirty_rat
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Location: Spring Hill, FL

Re: 03 motor/piston question

Post by dirty_rat »

Thank you Danny,

That explains why you can't just put a 94/95/97 rod on an 03 crank (different size crank pin). I had asked before (maybe not on this site) if there was a difference and never got an answer. Your post clears that up. Thanks again.
viclioce
Posts: 4868
Joined: Mon Apr 21, 2014 5:35 pm
Location: Santa Fe, NM
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Re: 03 motor/piston question

Post by viclioce »

Thanks Danny! Now I know! :ugeek: Victor

1978 175SL
1976 03 Wombat
1975 Road Toad 2
1974 98 Super Rat
1974 97 Super Combat
1973 96 Dirt Squirt 2
1973 Wombat Combat
1973 Combat Wombat
1972 94 Wombat
1972 Super Squirt
1971 92B+ Ace
1970 92B Ace 100B 2
1968 92 Ace 100
1966 Ace 90
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