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Old 01-22-2013, 08:29 PM   #8565
Miguel Sanchez
VD #94
Miguel Sanchez's Avatar
Joined: Jun 2010
Location: Bend(over), OR
Oddometer: 1,274
Originally Posted by Superpacman13 View Post
Jeebus, it won't rev up and now will only idle for about a minute. It gets boggy from 1/2 throttle up and puts the smoke cloud down. I have new points, new coil, new ignition(key), the exhaust is not plugged, I have put the needle in every position possible, tried every increment on the fuel screw. The rotary valve looks ok, but that doesn't mean anything because I don't know what its supposed to look like. Since its none of those, it must be that the schewgner valve being installed in the counter-clockwise plane.
Crank seal(s) like my genetic/geriatric/gentle/genital/genial/gelatin cousin said. Do a leak down test. Also, check the inner rotary valve cover seal - this separates the slick stiff from the combustible stuff. Pull the carb, then pull the cover the carb hooks to - it ought to have a good gasket seal all around it to keep oil out and air/fuel in.

If you took the rotary valve apart, it is possible to put the plate back in upside down and backwards on some of the Cow-a-socky models. Never worked on an 80, though.

Sounds a lot like an induction problem to me. Either it's sucking gear oil in a big way or the rotary valve doo-hicky ain't valving like ought to be.

I assume you have good compression and didn't bust a (the?) ring?

All else fails, get a Hodaka!
- Miguel

01 GS1150, 02 WR426F, 04 XR650L, 04 315R, 04 CRF230F, 81 R100RT (S), 56 G80CS, 87 MT11, 71 TS185, 74 98SR, 74 99RT, 76 TL250, 70 MX125, 80 DR400, 80 RS175, 80 RS250, 78 XR75, 74 RD350, 70 CT70, 06 Monster 620 Dark, and about a dozen more I can't think of right now...
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