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Author Topic: Not impressed with jetting or Kymco.  (Read 9539 times)

misfit77

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Not impressed with jetting or Kymco.
« on: March 29, 2012, 04:38:19 AM »
I got a kit from a place called 6 Sigma. http://www.ebay.com/itm/Kymco-Super-8-150-cc-Scooter-6-Sigma-Custom-Carburetor-Carb-Stage-1-3-Jet-Kit-/330695158383?pt=Motorcycles_Parts_Accessories&vxp=mtr&hash=item4cfef7aa6f

I paid a little extra because this kit was supposed to be custom to my needs. Since this was my first time, a step by step would have been real nice. Well the kit was a basic kit nothing fancy and instructions were generic and even forgot to mention the pilot jet.

It came with shims for the needle, 38 pilot and 110 and 115 main. Various bits for drilling here and there. Stock is 35 and 102.
Overall I am satisfied, but not impressed.


Anyway. I used 2 shims, the .38 and the 110. My plug chops were not really showing lean to begin with. Well, not impressed. Not sure if anything was improved. As a matter of fact I think hitting 60mph is bit of a struggle now.

I will be doing an airbox mod, maybe that will fix it a bit.

« Last Edit: March 30, 2012, 10:19:23 PM by misfit77 »
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zombie

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Re: Not impressed with jetting.
« Reply #1 on: March 29, 2012, 05:02:21 AM »
Try putting the needle back to OEM first.
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misfit77

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Re: Not impressed with jetting.
« Reply #2 on: March 29, 2012, 02:22:05 PM »
that is actually pretty easy to do.

I will check my plugs tonight and tomorrow on my day off will remove the shims from the needle and give it a shot. thanks.
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misfit77

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Re: Not impressed with jetting.
« Reply #3 on: March 29, 2012, 02:45:20 PM »
holy crap......this thing rode like an old mule.

Could not get to 60mph....stayed steady at about 57.

Also last 1/4 throttle did no better than mid throttle.
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zombie

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Re: Not impressed with jetting.
« Reply #4 on: March 30, 2012, 12:13:51 AM »
Was it better or worse w/out the shims?
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misfit77

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Re: Not impressed with jetting.
« Reply #5 on: March 30, 2012, 01:15:02 AM »
sorry....shims are still there. Will try taking them out tonight.

Stay tuned.
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misfit77

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Re: Not impressed with jetting.
« Reply #6 on: March 30, 2012, 05:01:41 AM »
Too lazy and tired to try the needle shims.

Took off the air box lid. Got to 64mph...yee ha.
Took off air filter got to 64 a bit quicker....yee ha.

I will check my plug tomorrow morning.


BTW, anyone transplant K&N gauze to factory filter? I might give it a shot, just need a oil filter donor.
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zombie

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Re: Not impressed with jetting.
« Reply #7 on: March 30, 2012, 05:14:36 AM »
That was showing the carb was rich till you opened the box. It will help to do the transplant. You may need to go to a cone filter in the end but good to see your improvement...
You might be able to pull the shims, and go w/ the stock air box too.
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misfit77

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Re: Not impressed with jetting.
« Reply #8 on: March 30, 2012, 05:42:43 AM »
Thinking of removing shims and adding these to the air box....I have to be different.



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zombie

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Re: Not impressed with jetting.
« Reply #9 on: March 30, 2012, 07:10:26 AM »
Keep it one step at a time with jetting. A bad 100 yard run could end it.
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misfit77

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Re: Not impressed with jetting.
« Reply #10 on: March 30, 2012, 04:47:48 PM »
oh yeah....remove shims and stock air box first.

Installing torque spring and dr pulley sliders.....if scoot wont do 65mph(GPS) thinking of selling it while I can get my money back.

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misfit77

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Re: Not impressed with jetting.
« Reply #11 on: March 30, 2012, 10:18:58 PM »
Well Sheet!

Removed shims. Install 13g sliders and yellow spring (stock was colored yellow). Cleaned the clutch bell and pads, larger& lighter baffled muffler.

This scooter is slow. All this labor and money and speedo won't go past 64. About 55mph actual. Take off is no better.

Waiting to to cool to check plug for mix ratio.

Am I missing something? I be dammed that the valves need adjusting on a nearly new bike.

My old Tank 150 would go in the 70s actual with a 2 stroke silencer, stock pipe, sliders and a Uni filter, no jetting, performance cdi and coil.

I think its time to sell.
« Last Edit: March 30, 2012, 10:21:08 PM by misfit77 »
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zombie

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Re: Not impressed with jetting or Kymco.
« Reply #12 on: March 30, 2012, 11:49:59 PM »
Come on Munks... Give it up. We all want to know what you know.
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zombie

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Re: Not impressed with jetting or Kymco.
« Reply #13 on: March 31, 2012, 12:26:26 AM »
And focus on one mod at a time

Best advice on the forum!
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misfit77

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Re: Not impressed with jetting or Kymco.
« Reply #14 on: April 01, 2012, 01:00:09 AM »
weights and main clutch have no impact on carburetor settings.
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