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"Fuel" needs for the Two-Stroke

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FuriouSly:
Redlined:


--- Quote ---but now I'm waiting on my top end to come back from eric gorr with port work plus a PC works and V2 reeds

Question is now my jetting is 55, 165, 2.5 turns, 3rd clip.  What changes would I have to make with U2.?  My riding averages around 700 feet elevation.
--- End quote ---

So you put Gorr's top end on?  What type of porting if any?  Up compression?  If mild to stock comp then U2 would be fine... its 101 octane leaded.


--- Quote ---run a 50 pilot jet and 175  mian  in pwk carb with u2 gas   b9 plug  -  stewart
--- End quote ---

Sound good if mild to stock comp with reeds and pipe.  700 feet may need 55 pilot and needle in the middle clip.  You ride and break it in already?  IF not, 182 main fat-start it at idle with little blips of throttle for about 3-5 mins until warm and shut down-let cool completely.  Do one more time.  Then take it out, warm it up and run it HARD WOT on some slight incline hills to set the rings.  You'll love it.

Sly

redlined_KX500:
Hey Sly,

I had already broken in couple days ago using the steps outlined in the complete top end rebuild thread. Except I heat cycle 3 times before I rode it. The piston/cylinder wall clearance slightly under the minimum.

I'm riding today so I'll try the clip, and pilot change to see what happens.

I had EG do his best mid to top end port work.  I don't ride alot of tight areas so low-end isn't a concern.  Compared to stock it's definitely a little softer off idle but the hit is much harder and seems much broader and also it has a very strong over rev.  Before it would sign off flat.

I didnt measure the compression yet. I did check the squish. It was 1.4 with stock base gasket and the .2 metal factory head gasket.

alexander-vmann:
I cant get leaded fuel here where i live, so i run on shell v power, its got the highest octane rating around here, is it possible to a lead substitute? (I cant get lead either) will lead substitute have the same benefits as regular lead?

Foxx4Beaver:
I myself have never been a fan of the lead additives/octane boosters, though some do show slight improvements...they're just not worth the money...otherwise you'd see a lot more of the motorsports industry using them.
If you suspect you're pinging, and can't get good quality fuel...then you could always have your head re-cut, so it'll run strong on the best fuel you're able to get.

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