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Post by Zino on May 31, 2023 16:49:35 GMT -5
If your piston head is dark in the middle with some silver fingernail patterns by each transfer around the edges thta is what you want
If you are all black you are lean
If it is 90 per cent black 10 percent silver you are good
70 per cent black 30 percent silver you are too rich
Thta is because the fuel coming in from the transfers washes the piston clean
You want some wash just not a ton
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Post by Zino on May 31, 2023 16:51:07 GMT -5
Get a better temp gauge trail tech makes a great one
I would stick with 90 for now
You liked how both ran and the 90 is richer
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Post by nicolascagefan on May 31, 2023 18:02:30 GMT -5
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Post by nicolascagefan on May 31, 2023 18:51:49 GMT -5
Hard to see the whole thing obviously, but I'd say it's maybe somewhere between 50/50 60/40, but it's more of a tannish/ gold color outside of where it's black, then silver towards the edge
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Post by Zino on May 31, 2023 19:09:35 GMT -5
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Post by nicolascagefan on May 31, 2023 22:02:11 GMT -5
Ok so I think I figured it out, and I thank you guys for sticking with me through this nonsense. I put the 98 main back in, took a chance and bought some BR9ES's thinking maybe the plug was just soaking way too much heat (low engine temp, presumably rich conditions with very white electrodes, I'm not and expert lol) took it for a quick run, and the electrode was pure white. Was about to give up and just order a new carb and jets, then noticed my air-screw looked pretty beat, even though I have never adjusted it (even with previous setup). The thing was about 3-4 turns out. I just screwed it in and backed it out about a half turn to see if I can finally get a sign of too much fuel, and sure as shit it wouldnt run and the plug was soaked. Let's take a moment of silence for all of the fallen NGKs that went towards this cause
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Post by Zino on May 31, 2023 23:28:33 GMT -5
The 9 plug actually pulls more heat from the cylinder than the 8 plug For cast iron builds like the polini sport the 8 plug is cold enough when you go to aluminum higher rpm higher compression single ring builds the 9 plug is recommended Your ground straps look like the 8 is plenty cold enough here is a good article for inspecting plugs www.empirenet.com/pkelley2/sparkplugreading.html |
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Post by Zino on Jun 1, 2023 7:46:47 GMT -5
this is the one that shows timing strap for how cold of plug to run it also shows that a # 2 pencil or 2mm smoke ring is what you are looking for and the 90 plug has that  |
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Post by RyanWiltshire on Jun 2, 2023 14:34:55 GMT -5
wait isn't being in the 80/90s+ degrees like dangerous? I always get worried when my temp gets into the 80s. Obviously running a MK2 Racing 70cc, but I thought anything over 80s is not good?
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Post by Zino on Jun 2, 2023 15:13:35 GMT -5
wait isn't being in the 80/90s+ degrees like dangerous? I always get worried when my temp gets into the 80s. Obviously running a MK2 Racing 70cc, but I thought anything over 80s is not good? These are air cooled scoots temps at half throttle are around 90-120 degress celsius (200-250 farenheit) and run wide open in the 150-175 celsius (300-350 range farenheit). |
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Post by RyanWiltshire on Jun 2, 2023 15:19:48 GMT -5
wait isn't being in the 80/90s+ degrees like dangerous? I always get worried when my temp gets into the 80s. Obviously running a MK2 Racing 70cc, but I thought anything over 80s is not good? These are air cooled scoots temps at half throttle are around 90-120 degress celsius (200-250 farenheit) and run wide open in the 150-175 celsius (300-350 range farenheit). Oh makes sense, my temps are watercooled, with a radiator fan, which switches on at 73c. how do you know if your water pump is not working? would the bike get hot quick even idling? |
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Post by Zino on Jun 2, 2023 15:49:51 GMT -5
roxxi
in place of a water pump on one end of the crank,we have a fan that forces air over fins on the cylinder head .
It provides some cooling most of it is provided by richer jetting than you guys can run on the water cooled scoots .
My scoot if i just let it idle gets around 80-90 degrees .
The water cooled scoots can run leaner jetting higher rpm and higher compression than the air cooled scoots that gives you a big performance advantage .
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Post by RyanWiltshire on Jun 2, 2023 15:52:56 GMT -5
roxxi in place of a water pump on one end of the crank,we have a fan that forces air over fins on the cylinder head . It provides some cooling most of it is provided by richer jetting than you guys can run on the water cooled scoots . My scoot if i just let it idle gets around 80-90 degrees . The water cooled scoots can run leaner jetting higher rpm and higher compression than the air cooled scoots that gives you a big performance advantage . how do you know if your water pump is not working? would the bike get hot quick even idling? |
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Post by Zino on Jun 2, 2023 16:05:30 GMT -5
no water pump on air cooled cooled scoots
we have forced air cooling instead
we compensate with richer jetting on the pilot and the main jet to help keep temps in control compared to water cooled scoots .
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Post by RyanWiltshire on Jun 2, 2023 16:08:04 GMT -5
no water pump on air cooled cooled scoots we have forced air cooling instead we compensate with richer jetting on the pilot and the main jet to help keep temps in control compared to water cooled scoots . Okay thanks mate!  could you take a look at my recent thread I made and give your opinion on the images I provided please? |
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