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Need help with vintage Hondas from the 1960s? I am an expert with 250-305cc bikes in particular and most all of the other pre-91 models, in general. I do NOT claim to have a great deal of experience on Gold Wings, Cruisers, ATC/ATVs and dirt bikes.
I have owned/ridden/maintained Honda motorcycles for 35 years. I have written five books on Honda repairs and collecting. I was a service manager for two Honda shops back in the 1980s.
VJMC (Vintage Japanese Motorcycle Club) of North America
VJMC newsletter, as editor for two years and as contributing editor currently.
I appreciate connecting with other vintage Honda enthusiasts, anywhere in the world.
| User | Date | K | C | T | P | Comments |
|---|---|---|---|---|---|---|
| Randall | 11/01/09 | 9 | 10 | 10 | 10 | |
| Don | 10/24/09 | 10 | 10 | 10 | 10 | |
| Mike | 10/23/09 | 10 | 10 | 10 | 10 | Thanks! |
| mike gillard | 10/23/09 | 10 | 10 | 10 | 10 | tkank you bill this is much like ..... |
| Mike | 10/22/09 | 10 | 10 | 10 | 10 | Thank you very much! Very quick answers ..... |
Chris, the crankshaft doesn't really know what stroke it is on. The piston is either up or down or somewhere in between. What constitutes one of the 4 cycles is how the cam timing is affecting the valve
Kirby, about the only source of "black bits" inside the motor would be shown here: http://www.cmsnl.com/honda-ct90-trail-90-k0-us_model619/partslist/E++04.html The camchain tensioner/guide rollers
Terry, with stock OEM intake/exhaust, you really don't want to put a lot of big jetting in it. Just some subtle tweaks will do just fine. Lift the needle with a shim, richen up the idle mixture screws
Sean, misfiring under load problems can stem from several causes. I guess you know that the ignition is CDI, so not adjustable. Pretty much works or it doesn't, however the CDI modules can fail and
Randall, I haven't worked on this specific model and from appearances of the illustrations, the seat should have come out of the recess from the outside, which is normal Honda practice. In rare occasions

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