Author Topic: Honda s90 enduro  (Read 2207 times)

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Offline 02z06dave

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Honda s90 enduro
« on: March 19, 2018, 06:01:31 AM »
I've been looking for a reasonably priced dual sport for a little while. I saw this s90 on ebay for pretty cheap and it wasnt too far from me. The red neck part of my brain took over and i decided it would be the perfect candidate to make into a dual sport. Perfect other than the weak chassis and almost everything about it. I want to keep this project cheap. I paid 106.50 for the bike. I think i can sell off what i wont be using and make that back with maybe a little leftover. For suspension its going to get a complete front end from a kawasaki kx250s along with the swingarm, mono shock, and rear wheel. All of the kx250s parts are free, sort of. I'm rebuilding my buddies atc125 engine in exchange for those parts. For the engine, i was thinking id go with the daytona 190 with the 212 big bore kit, but that same buddy said hed throw in a kx500 engine. It may not be really feasible, but i like the sound of a free 500 2 stroke so were going to give it a shot. The daytona will be the backup plan. Of course, were going to have to try to strengthen the frame as much as possible. The goal is to have this done for mid ohio, so i have something small to ride around on.

Offline Goofaroo

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Re: Honda s90 enduro
« Reply #1 on: March 23, 2018, 08:33:15 AM »
I'll be watching this.   A KX500 engine in a S90 frame sounds like a great idea!  When you get it together the first ride should be televised.   

I've got an S90 carcass that I robbed some transmission parts out of.  Let me know if you need any bits from it. 
1972 CB500 four
1972 CT90
1974 CT90
1978 BMW R100S
1983 CX500
1986 GL1200 Aspencade
1986 CH150 Elite Deluxe
1984 NH125 Aero
2005 Genuine Stella 2T
2007 KLR650
2002 KLR250
1985 XR350R plated
1994 DR350SE
2004 Concours ZG1000
1987 KDX200 C
1992 KDX200 E
2010 BMW F800GS
Always room for one more.

Offline 02z06dave

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Re: Honda s90 enduro
« Reply #2 on: April 20, 2018, 04:12:12 PM »
I'll be watching this.   A KX500 engine in a S90 frame sounds like a great idea!  When you get it together the first ride should be televised.   

I've got an S90 carcass that I robbed some transmission parts out of.  Let me know if you need any bits from it.

Thanks, i appreciate it

Offline 02z06dave

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Re: Honda s90 enduro
« Reply #3 on: April 20, 2018, 04:15:45 PM »
I finally started tearing the bike down today and tested the kx250 front end on it. Im waiting for my buddy to bring me the rest of the 250 parts. Were going to be swapping the neck from the 250 frame onto the s90 frame and hopefully fitting the monoshock rear end. I decided to keep the tank and seat stock. I do need both. The tank i had was too far gone. Couple big holes. I also decided against the 500 engine. Ill be going with the daytona 190 with a 212 kit.

Offline CBJoe

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Re: Honda s90 enduro
« Reply #4 on: April 20, 2018, 05:13:40 PM »
What muffler do you have hanging off that frame right now?
'07 Bonneville Black
'15 Moto Guzzi California 1400
CB750K2 Hot Rod Revival http://forums.sohc4.net/index.php/topic,171693.0.html
'65 CB77
'66 CM91 (C90'ish)

Offline 02z06dave

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Re: Honda s90 enduro
« Reply #5 on: April 20, 2018, 05:26:03 PM »
What muffler do you have hanging off that frame right now?

Idk. Some rotted out muffler that came on it. Its going in the trash, when i take it off