Eureka! WooHoo!

david f martin /
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I found it!

After a week of bumming rides to work and back and feeling very depressed, I finally got my toolbox home, got off from work at 1pm today, and got to work on my bike, out in the yard, in the sunshine...

This is what I'd done so far, in case you hadn't followed my previous threads...

Cleaned carb. Drilled holes in the aircleaner. Bought a new jet, stock sized. Drilled jet. Replaced suspect muffler with straight pipe (VW tailpipe). Covered holes in aircleaner, restricted the exhaust. Bought a new battery (suspect CDI). Priced a new top end from the Yamaha dealer ($200, ouch). Whined to the MopedArmy list and felt sorry for myself.

Today, when I got home from work, I pulled the whole damned head and cylinder.

Immediately I found that the exhaust port (which is supposed to be about the size of my thumb) was clogged up, with a very small hole slightly smaller than a pencil for the exhaust to exit. I scraped it out with a pick and my pocketknife, and cleaned up the other ports while I was at it.

Piston has some pretty deep grooves in it. At first inspection, the cylinder seemed to have some deep scoring, too, but upon closer examination, what I thought were grooves turned out to be carbon deposits left from the gaps in the rings. I cleaned those up with my pocketknife, too.

Put the top end back on, cranked the bike and revved it. She revved up quickly, sounded like a dirtbike. Called my sister with the news...

Took it for a test drive. Holy shit, now it moves! Better than it ever did since I've owned it! It was like riding a small motorcycle, rather than a bike with a hamstermill on the back wheel... The clutch engages when it should. Now it climbs hills, accelerates, and makes a lot of noise (damned VW tailpipe). This has been a very good day for my bike and me.

Issues I still need to address: (1) I better break down and buy a muffler, before the neighbors call the cops. (2) The ratchet mechanism for the kickstart is getting iffy. (3) I'll have the cylinder honed, get 2nd oversize rings and a new piston. (4) Maybe a bumper sticker, "Don't laugh, mine's paid for"...

Thanks for all the help and sympathy. I don't know what I'd've done without this forum and its Gurus. I'll try to get a fresh pic up in the next day or so.


This single post is part of a larger thread. Start from the top or view this post in context.
Subject Written By Posted
  Eureka! WooHoo!Topic by: david f martin david f martin 03/10/01 05:47PM
  Re: Eureka! WooHoo!Re: moby moby 03/10/01 07:35PM
  Re: Eureka! WooHoo!Re: Reeperette Reeperette 03/10/01 08:34PM
  Re: Eureka! WooHoo!Re: Ron Brown Ron Brown 03/11/01 10:36AM
  Re: Eureka! WooHoo!Re: david f martin david f martin 03/11/01 12:19PM
  Re: Eureka! WooHoo!Re: Ron Brown Ron Brown 03/11/01 01:09PM

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