Pasi S. Posted April 14, 2015 Report Share Posted April 14, 2015 Cut both plugs this time and post a pic of them.If they are equal, I would vote NO for Air Leaks. Quote Link to comment Share on other sites More sharing options...
kenyounot Posted April 14, 2015 Author Report Share Posted April 14, 2015 Okay will do buddy Quote Link to comment Share on other sites More sharing options...
RadarRacing Posted April 14, 2015 Report Share Posted April 14, 2015 Hey K. Many factors will make one bike need different jetting. If I had to guess I would say your domes were pretty aggressive or exhaust port is somewhat higher than the guys running mainjets in the 150s. If you want that bike to run quite a bit better it looks to be able to handle quite a bit more timing by looking at the ground strap. Adding timing requires quite a bit more fuel as well however. One thing adding timing does is it takes heat away from the pipes. You stated that the pipes were getting very hot. If I were tuning that bike I would go up on timing from where it is at right now and start at least 3 or 4 jets richer. I really dont think that chop looks lean. If its between the thickness of a dime and nickle it shouldnt be lean regardless of that grayish color. It appears to be a darkish thick gray and wide enough band. Some fuels and oils give wierd colors. Sometimes gray, brown or even yellow ring. For a rider or duner bike I shoot for a smoke ring the thickness of a nickle/quarter. On a 300 foot dragbike I tune a hair thinner/leaner. Quote Link to comment Share on other sites More sharing options...
RadarRacing Posted April 14, 2015 Report Share Posted April 14, 2015 If you see the color change on the groundstrap it is out towards the end a hair. I think it will like 2 degrees more and if you go up a few jet sizes I think your plug chops will look a bit more pronounced and give you a good reading. The bike will also become much snappier down low and off idle. Just watch the jetting on the needle. If you do a plug chop at 1/2 throttle you want richer than WOT and more color on the plug. 1 Quote Link to comment Share on other sites More sharing options...
kenyounot Posted April 15, 2015 Author Report Share Posted April 15, 2015 Welp went to do the plug chop even had my helmet on and just had a irk to look into the heat problem more. I took the rad cap off and started her up. No air bubbles... gave it alittle chop on the throttle and it bubbled a little. Something just didnt look right. So I pop the exhaust off and the gas tank to retorque heads for a 3rd time. As I was under the bike I noticed green liquid building up around the exhaust spring bracket. Look up and noticed a green lining in between the head and jug. Retorqued again at this point it was too late to start it and check. So I decided I'm going to run another leak down tomorrow since the exhaust is off. Then start it and see what happens. If all is well I'll continue my plug chop adventure, if not then well I'm beat. Gasket was OEM torqued to specs and retorqued after break in. As for the timing, I'm at +6 timing right now should I still advance or would a coolant leak cause the discoloration at the strap? Quote Link to comment Share on other sites More sharing options...
Phelps Posted April 15, 2015 Report Share Posted April 15, 2015 i would have never said advance the timing anymore. strap already looked sand blasted which is a good indication there was detonation. either lack of fuel or too much timing or both. you can cover it up with fuel, back the timing off or both, but hey i'm sure someone will correct my advice. start safe and then start the leaning process. it's not a drag bike.... 1 Quote Link to comment Share on other sites More sharing options...
Phelps Posted April 15, 2015 Report Share Posted April 15, 2015 too answer your coolant question.... it leaking outside of the head doesnt mean it's leaking into the cylinder. the fire ring has a much better seal then the outside edge of the gasket. Quote Link to comment Share on other sites More sharing options...
sleeper06 Posted April 15, 2015 Report Share Posted April 15, 2015 If it's detonating that head will move, who cut the head for the 4 mil , what's your squish @, check compression again , Quote Link to comment Share on other sites More sharing options...
sleeper06 Posted April 15, 2015 Report Share Posted April 15, 2015 Did you ever get the rite fuel Quote Link to comment Share on other sites More sharing options...
kenyounot Posted April 15, 2015 Author Report Share Posted April 15, 2015 Well I was running straight 116 when I had the coolant problem. Right now Im running straight 100. Ill check squish today. Quote Link to comment Share on other sites More sharing options...
kenyounot Posted April 16, 2015 Author Report Share Posted April 16, 2015 K boys. Leak down test passed. I should have done the leak test before retorqueing the head bolts to see if it was leaking there. I kept the same 162 mains in to see if there was a difference and in my opinion there is. Head gasket must have been leaking. Still kinda grey looking though. Sorry for second plug my cutter went dull and the replacements I bought were for a different quick connect on the dremel. Quote Link to comment Share on other sites More sharing options...
kenyounot Posted April 16, 2015 Author Report Share Posted April 16, 2015 On a side note the gasket isnt leaking anymore but im still spitting coolant wtffff man. Quote Link to comment Share on other sites More sharing options...
Phelps Posted April 16, 2015 Report Share Posted April 16, 2015 Busted impeller, head gasket allowing compression into coolant ports, lean, dirt packed radiator Quote Link to comment Share on other sites More sharing options...
kenyounot Posted April 16, 2015 Author Report Share Posted April 16, 2015 Busted impeller, head gasket allowing compression into coolant ports, lean, dirt packed radiator Those last plugs still look lean? Quote Link to comment Share on other sites More sharing options...
Phelps Posted April 16, 2015 Report Share Posted April 16, 2015 I was giving you reasons why it's still puking coolant. You need to fix the real issues before jetting. Quote Link to comment Share on other sites More sharing options...
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