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Author Topic: Dialed in  (Read 936 times)

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Offline matchanu

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Dialed in
« on: October 04, 2007, 05:58:04 AM »
The bike is finaly on the road.

I took it to work yesterday, everything was fine untill 3/4 to WOT. It would burbble out. I would get to about 80 mph and nothing more.

I changed the jets last night from 135 to 125.

On the way to work this moring, she screamed at 120+ and 11K on the tac.

She still had more to give.

I'm happy.
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Offline my78k

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Re: Dialed in
« Reply #1 on: October 04, 2007, 06:01:09 AM »
Congrats!! Well done...
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eldar

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Re: Dialed in
« Reply #2 on: October 04, 2007, 07:25:45 AM »
Another classic case of too much fuel. Amazing how this happens so often.
Sounds like you got a rocket on your hands now and under your ass!
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Offline matchanu

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Re: Dialed in
« Reply #3 on: October 04, 2007, 07:59:23 AM »
Quote from: eldar, Master of the K8 Thunder! on October 04, 2007, 07:25:45 AM
Another classic case of too much fuel. Amazing how this happens so often.
Sounds like you got a rocket on your hands now and under your ass!

Indeed.

I was running WAY too lean, untill I changed to needle clip possition.

I had to spend 130 buck on new (used) parts as the screws holding the throttle rod were so rusted and rounded out they were permently frozen.

Money well spent.

An important lesson, even a minor top end repair is going to require new tuning and lots of patience.
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eldar

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Re: Dialed in
« Reply #4 on: October 04, 2007, 08:59:32 AM »
It always does it seems.
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Offline mlinder

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Re: Dialed in
« Reply #5 on: October 04, 2007, 09:20:27 AM »
I just installed 125's (up from 120's) last night. The difference this morning is amazing. (I was running lean).
Hard to believe that a change of 4.16% can make as much difference as it does. Still got the tiniest lean spot at about 1/4 throttle at certain RPM's, but I think I can take care of that with larger idle circuit jets (still running the stock 40's).
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Offline matchanu

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Re: Dialed in
« Reply #6 on: October 04, 2007, 09:48:53 AM »
What I don't get is I live at an elevation of 5K. I should have issues with running rich.

I did a valve job and new rings for the pistons, changed out the ignition to the DynaS and 5 ohm coils, but really nothing else performace wise.

Yet, I went from running too rich with the 110's, to running WAY too lean untill I found the sweet spot with the 125's.


Meh, it's all good now.
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Offline S-Dog

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Re: Dialed in
« Reply #7 on: October 04, 2007, 12:29:18 PM »
wouldnt bigger jets make it run richer? bigger hole = more fuel? Maybe I am just confused.
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Offline mlinder

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Re: Dialed in
« Reply #8 on: October 04, 2007, 12:33:20 PM »
Yeah, hes noting how a tuned and freshened engine needs different AF mixtures.
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Offline matchanu

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Re: Dialed in
« Reply #9 on: October 04, 2007, 12:39:05 PM »
Quote from: S-Dog on October 04, 2007, 12:29:18 PM
wouldnt bigger jets make it run richer? bigger hole = more fuel? Maybe I am just confused.

I was running 110s, as stock, before the build.

After the build, I figured because of the altitude, it would be running rich, (higher altitude, less air, richer mixture).

It ran very lean, so I got sets of main jets from 115 to 135. I was running 135 as it was still running lean untill I changed the clip setting on the needle. After the clip setting change, it was only running rich at 2/4 to WOT. After changing the main jet from a 135 back down to a 125, it's all dialed in.

Make a little more sence now?

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