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Old 07-10-2011, 04:23 PM   #1
jtn OP
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Three CT90 rebuilds . . .

I came across a couple truckloads of Trail 90's and parts, and figured they would make a good project. In the beginning:





Then some new paint:




New shoes, with clean rims painted to remove friction and rim strips:



Rebuilt transmissions, wrapped and waiting for installation:


Engine cases cleaned and sandblasted, I may black out one of them but I kindof like the raw look.


Replaced the phillips bolts with allen heads, especially those for the cases and parts that will be taken apart often.


I've ended up with a ton of extra parts listed here:
http://hondatrailcts.yuku.com/topic/...s#.Tho0NM1szIY
PM me if you need anything.
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Old 07-10-2011, 04:32 PM   #2
deezildennis
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Sweet!!!
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Old 07-11-2011, 12:28 AM   #3
MQracing
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I'd love to see a pic of the green one when your finished.

What a neat find. And you seem to be gettin' a really great
kick out of restoring them.

MSL
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Old 07-11-2011, 05:08 AM   #4
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+1 on more pics!
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Old 07-11-2011, 09:30 PM   #5
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in!
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Old 07-13-2011, 12:50 PM   #6
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Quote:
Originally Posted by MQracing View Post
I'd love to see a pic of the green one when your finished.

What a neat find. And you seem to be gettin' a really great
kick out of restoring them.

MSL
Waiting on a set of forks I ordered for that one -- I'll put more for it up when they're in. In the meantime, assembly continues on the others . . .

The spark advance on the points ignition -- it basically rotates the cam that triggers the spark so it fires earlier when the rpms are up (the piston is traveling faster, so the spark needs to fire earlier so the combustion still happens at the appropriate time). What a cool mechanical way to do it.


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Old 07-13-2011, 01:58 PM   #7
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Yeah, all distributors were set up that way back in the day.
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Old 07-19-2011, 09:52 AM   #8
jtn OP
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The assembly is underway.





Electrical problems I find are some of the most frustrating, and many of mine stem from bad ground connections especially after a new paint job. So, as much as it pains me to grind away new paint . . . this is for the ground on the coils:


And a new big bore 54mm piston and cyl:


Rectifier upgrade:
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Old 07-23-2011, 04:04 PM   #9
OkieTom
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Ct90

I just traded for a 1969 CT90, it's hard to believe this thing is 42 years old and still runs like a top. These are great little machines.
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Old 07-26-2011, 10:59 AM   #10
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Quote:
Originally Posted by jtn View Post
the spark needs to fire earlier so the combustion still happens at the appropriate time). What a cool mechanical way to do it.
Before I let out the suppressed giggle, first let me say a big loud "good onya!" for doing the resto's, well done man, they're coming up real nice. I like the white paint shown, dunno if it's just primed/painted/whatever, but I rekn one of those old girls in white would look pretty good. I'm glad I'm not the only one who's come home with boxes of junk that apparently resembles a motorcycle.

Oh yeah, the giggle.....

I think I might be a bit older than you. I used to hate those things, the sooner I converted everything to Dyna the better!

More pics when you going through it all, I'm very jealous of your find! That lot would keep me amused in the shed for ages.
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Old 07-26-2011, 11:03 AM   #11
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Oh yeah, almost forgot.
When you do the next bike electricals up and are looking to provide a decent earth (very important, as you already know), you might like to give these a go......
http://www.wurth.com.au/catalogue/A09_6241.pdf
No need to scrape away paint, lock the bolt in against rattles, really digs in to the parent metal for a good connection, and hidden under the bolt-head out of sight.
Have fun man!
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Old 07-30-2011, 02:04 PM   #12
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Originally Posted by MODNROD View Post
Oh yeah, almost forgot.
When you do the next bike electricals up and are looking to provide a decent earth (very important, as you already know), you might like to give these a go......
http://www.wurth.com.au/catalogue/A09_6241.pdf
No need to scrape away paint, lock the bolt in against rattles, really digs in to the parent metal for a good connection, and hidden under the bolt-head out of sight.
Have fun man!
Good point, I'll use those from now on.





New plug caps and exhaust studs:


Custom exhaust:
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Old 07-31-2011, 04:10 AM   #13
Hammerspur
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Quote:
Originally Posted by MODNROD View Post
... When you do the next bike electricals up and are looking to provide a decent earth (very important, as you already know), you might like to give these a go......
http://www.wurth.com.au/catalogue/A09_6241.pdf
No need to scrape away paint, lock the bolt in against rattles, really digs in to the parent metal for a good connection, and hidden under the bolt-head out of sight.
That's a good suggestion, have lots of those!
-------------------------------------------------------------------------------------------------------------------------------------------
jtn, I like the pipe, is that a VW tip on the can... Any details?
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Old 08-06-2011, 02:36 PM   #14
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That's a good suggestion, have lots of those!
-------------------------------------------------------------------------------------------------------------------------------------------
jtn, I like the pipe, is that a VW tip on the can... Any details?
I'm not sure where it came from -- perhaps an aftermarket VW tip. It was in the buckets and buckets of extra parts I got with the bikes (why is it that every CT90 ever sold also comes with a milkcrate full of spare parts?)
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Old 08-07-2011, 08:18 AM   #15
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Quote:
Originally Posted by jtn View Post
(why is it that every CT90 ever sold also comes with a milkcrate full of spare parts?)
People think coz they're old they need spares, only to find the things run forever on general abuse!
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