First Time Rider
Arm chair racerNew to the board
What is the best way to clean up a flywheel/rotor without damaging it. It's got rust on it but there isn't any pitting. The motor ran but the guy I got it from said it's been parked outside for about 12 years but it still turns over. It's a 73 us90 with cdi 110 topend.
First Time Rider
Arm chair racerNew to the board
Any advice would be appreciated.
First Time Rider
Arm chair racerNew to the board
It's hard to believe nobody has done this before just picked up a 81 atc70 that needs the same thing done to it
Power User
Got the holeshot
Clean the outside, metal part, with a brass wire brush.
Blow the inside out with compressed air, without getting right onto it.
Don't use any solvents. You don't want to dislodge the magnets.
There's no need to make it look pretty. Just get the loose stuff off, the bore clean so it sits true on the crankshaft, and blow off any metal debris stuck to the magnets.
The story of three wheels and a man...
First Time Rider
Arm chair racerNew to the board
Thanks I've had people tell me to spray it with all kind of things.
Power User
Got the holeshot
In fairness, they may not be wrong.
I seen '110' and just presumed it had that flywheel, which is different than the 90.
If it still has points and the 90 flywheel, a light soak is something that's not too aggressive may help loosen rust. It just depends of if the magnets are glued in or held in with some type of rubber/plastic, which wouldn't be good to soak in anything.
I still wouldn't use a steel wire brush on it, too much of that could get caught up in it somewhere and be hard to remove. Brass isn't magnetic.
The story of three wheels and a man...
First Time Rider
Arm chair racerNew to the board
It's cdi for sure. It has 105 on the cylinder and black cdi cover on head and black cover from the pull start to the hi/lo sub trans. I'mstill trying to figure out how to post a pic here.
New to the board
Arm chair racerNew to the board
Like the King said , wire brush , maybe a light sanding. Blow/wipe it good before assemblyOriginally Posted by TRIPOD guy
First Time Rider
Arm chair racerNew to the board
The flywheel is almost identical to a 185s one just the center bore is a different size.
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