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General Category >> Rubber Side Down! >> Help me calibrate my "seatometer" (carb stuff)
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Message started by Sandy Koocanusa on 06/24/08 at 19:19:43

Title: Help me calibrate my "seatometer" (carb stuff)
Post by Sandy Koocanusa on 06/24/08 at 19:19:43

Someone said recently that their decals added 50 horsepower each. That made me laugh, but I'm guilty of a similar syndrome sometimes. So I need you guys to tell me what I'm imagining, what is real, and if what is real is o.k.

I rejetted to a #50 pilot jet from the stock 47.5 last night. At the same time I removed just about everything that was left in my muffler. I have the same 155 main jet I've always had. Rode to work this morning (about 45 miles, so the bike was good and warm.)

Here is what I noticed (I think): The bike does not seem to be so "snappy." Instead of leaping (or jerking) when I open the throttle, or nose-diving when I slap it shut, the bike seems much more smooth. It pulls steadilly off the line, and doesn't "feel" ready to shift as early as it did. It seemed like I was 5-10 mph faster when I was ready to shift into third and fourth gears. I tried and tried, and could not get it to backfire. From WOT on the highway, when I decelerate, I swear it sounds just like the Jacobsen's brake on an 18 wheeler.

Could one little piece of brass really change it that much, or am I dreaming?

Synopsis: Sounds good, feels good, runs good. I think I'll keep it. Unless I get tired of the noise. :)

Title: Re: Help me calibrate my "seatometer" (carb stuff)
Post by verslagen1 on 06/24/08 at 19:30:37

So you couldn't get it to pop? and it don't have the same snap? And I bet no crackle either, but a good Jacoby. 8-)

Try leaning up the idle until you get it to pop. you can afford to be a little lean on idle, the bike is just coasting or sitting still, and you won't be there for very long.

Title: Re: Help me calibrate my "seatometer" (carb stuff)
Post by serowbot on 06/24/08 at 19:32:10

Your "seatometer" seems to like the changes. Pat yourself on the back for a job well done. Enjoy.

Title: Re: Help me calibrate my "seatometer" (carb stuff)
Post by Sandy Koocanusa on 06/24/08 at 19:36:53

Verslagen1, when I tuned it last night, I ended up with the screw all the way shut and it never did start to stumble. So I set it about 3/8 turn out. I didn't figure it was a good idea to close it all the way. Although I don't know on what wisdom I base that decision. Can I run it with that screw all the way in?

Thanks, Serowbot. I'll try not to dislocate my shoulder in the process. :)

Title: Re: Help me calibrate my "seatometer" (carb stuff)
Post by T Mack 1 on 06/24/08 at 19:37:26

Keep an eye on the spark plug for rich/lean color.

Also, your MPG, but that may be hard to evaluate because of the SMILE factor ;D .