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General Category >> Rubber Side Down! >> Its Alive!!
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Message started by Brendan on 07/23/06 at 18:39:40

Title: Its Alive!!
Post by Brendan on 07/23/06 at 18:39:40

I worked on my bike yesterday to try solve the problem the previous owner had with it of fouling plugs, I thoroughly cleaned the carby including removing a bunch of carbon from the carb slide and replaced the old coil with a brand new one as well as putting in an iridium plug and a brand new battery. She roared to life after a few cranks (with the help of a few sprays of Aerostart) and I took her out. She had a bit of a miss in her but this was expected as she hadnt been run for 3 years and it seemed to improve as the bike warmed up. I parked it and put my cousin on for a ride and he went for a decent squirt. By the time he came back it was singing. The idle was up a bit when he returned so Ill drop that, and I had the carb breathing straight from the atmosphere so I could spray the Aerostart in there so Ill connect it up to the aribox before I start riding her properly.

My ques is, when we parked it around the side of the house in the dark and killed all the lights I noticed that that header section of the pipe was glowing red. Not bright red, but deep red and you could only just see it with the lights off. Is this normal or is it likely that having it breath straight from atmosphere caused it to burn lean? My cousin was up it when he was riding it though, blowing the weeds out of it, so this also may have contributed.

Its an 86 with a 155 main, not sure of the pilot.

Title: Re: Its Alive!!
Post by steelwolf on 07/23/06 at 18:59:02

My guess would be the super lean condition by not having any air flow restrictions. Lean = heat

Title: Re: Its Alive!!
Post by Steve530 on 07/23/06 at 20:17:46

Yea, that seems like a good guess.

Title: Re: Its Alive!!
Post by lancer on 07/24/06 at 06:06:33

Check your spark plug and see what it has to say about the whole affair? :)
Then put an air filter on it ... always use some kind of filter on the street to keep rocks and weeds out of that wonderful engine. I understand the brief testing requirements, but otherwise filter it.
After the filter is on go through the step by step tuning/jetting process. Then you will no longer have the glowing red pipe.

Title: Re: Its Alive!!
Post by Ed_L. on 07/24/06 at 11:49:35

You didn't mention if you have an aftermarket exhaust on the bike, a free flowing muffler along with no air filter will cause the bike to run a lot leaner, easy in/easy out makes the thumper scream and shout ;D

Title: Re: Its Alive!!
Post by Brendan on 07/24/06 at 14:40:01

Its got a stock muffler at the moment. I imagine it was mainly because it was breathing unrestricted and my cousin was giving it a flogging. It sounds like its not the norm though.

Its been raining here ever since I got the bike running , which is just typical cos it hasnt rained in Canberra for god knows how long! So I have to wait to go for another ride.

Title: Re: Its Alive!!
Post by Brendan on 07/30/06 at 21:36:20

Yeah I put the pipe back on that connects the carb to the airbox and its like a different bike. Starts first crank, rides so much smoother and is quite simply better everywhere.

Now I have to ride it for a week straight to see if the coil I replaced fixed the plug fouling issue.

Title: Re: Its Alive!!
Post by Brendan on 01/15/07 at 13:34:20

Update: Its been 6 months and quite a few tanks of juice since I replaced the coil and the bike hasnt fouled a plug yet, it reads a touch rich but the bike runs well nontheless. I am mates with the previous owner and he said it used to foul a plug in as little as half a tank, so for now I am going to say problem solved! Its amazing how electrical problems can emulate carb problems almost perfectly.

Title: Re: Its Alive!!
Post by franch on 01/15/07 at 15:24:33

cool beans !

Title: Re: Its Alive!!
Post by Reelthing on 01/15/07 at 19:07:38

Brendan wrote:

maybe - but cleaning up the carb slide is a big winner as well - if it hangs going back down or is too slow about it will sure foul a plug - leaves the mainjet open too much