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Author Topic: 1973 Honda ST90 Restoration  (Read 392 times)

Offline Tim

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1973 Honda ST90 Restoration
« on: Mar 19, 2018, 19:25:31 »
Figured a build thread was needed for this.

A couple years back I picked up a running Honda ST90.  Badly painted white, with spray-bombed black wheels and rear fender and Honda emblems screwed into the frame but all there and running.

It's just used up at the cottage but it deserves some attention and my now-16 year old daughter has ideas about riding it to school.  It's a street-legal bike, and about the size of a Grom so it's a great little city bike.

Broke it down and had the frame painted what I believe to be a close match to the original Honda Tahiti Red it was under the white paint.  Some fresh decals from Reproduction Decals finished it off nicely.

I've ordered aluminum 14" rims from Thailand and am getting stainless spokes from Buchanan's.  I figured this was a better option than trying to clean what are likely rusty crusty wheels out from under the black spray.  I'll cut the hubs out and have them vapor blasted.

I've got new Shinko dual-sport knobbies ready to put on the rims once I build them.  With the aluminum rims/stainless spokes they should last a lifetime with fresh bearings.

Some of the bits like the swingarm etc. will need to be powdercoated silver and other parts like the front crashbar will get chromed.

Finally, I may replace the engine with a 110cc manual shift Lifan pitbike model.  The 90cc motor runs, but it's tired and the shifting is jenky with the 3 speed semi-automatic setup.  I want my daughter to learn a proper clutch and the semi-auto isn't well suited to city riding.





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Offline clem

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Re: 1973 Honda ST90 Restoration
« Reply #1 on: Mar 20, 2018, 23:03:15 »
Nice Tim! You don't see these often.

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"After every war there are soldiers who refuse to surrender. To this day there are still thousands who cling to their 30+ year old motorcycles, thinking that the war is still on, refusing to concede that the four-strokes have won"

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Online stroker crazy

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Re: 1973 Honda ST90 Restoration
« Reply #2 on: Mar 20, 2018, 23:31:39 »
had the frame painted what I believe to be a close match to the original Honda Tahiti Red …

Red paint is always worth an extra mph or two, but the Lifan will really pick it up!

Crazy
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Offline canyoncarver

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Re: 1973 Honda ST90 Restoration
« Reply #3 on: Mar 21, 2018, 02:30:54 »
Very cool.  I like the pitbike motor idea.
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more YZF750R's, the KZ's, a Zephyr750...and the unfinished 75' CB550 cafe.
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Offline Hurco550

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Re: 1973 Honda ST90 Restoration
« Reply #4 on: Mar 22, 2018, 12:30:41 »
i like it. will be a neat one for sure
"If you just picked up a drug habbit instead of a kawasaki triple at least you could get high while you waste money"
~ bradj
1988 tw200, the swamp donkey: http://www.dotheton.com/forum/index.php?topic=75455.0
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1976 BMW R90/6 farkilitious: http://www.dotheton.com/forum/index.php?topic=74349.msg882477#msg882477
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1976 GT250 Rebuild: http://www.dotheton.com/forum/index.php?topic=64973.new#new
Full Custom Pit Bike: http://www.dotheton.com/forum/index.php?topic=66954.new#new
1971 Yamaha 90cc twin HS1: http://www.dotheton.com/forum/index.php?topic=70498.0
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Offline The Jimbonaut

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Re: 1973 Honda ST90 Restoration
« Reply #5 on: Mar 22, 2018, 13:02:36 »
Yeah man love these little bikes, keeping my eye open for an affordable fixer-upper for ages.  Know exactly what I'm gonna do with mine!
"I'm telling you Donnie, nuthin' but nuthin' but right"