I was wonderin if my bike idels then the pilot is good? And can u melt the piston down if your rich like it would if u was lean?
can your motor still blow if your rich???
- Thread starter blaster321
- Start date
a stock 32.5 pilot jet in the stock carb will be good for all stock cylinders,
and even at rich main jetting, a worn cylinder, developing an airleak, or holding wide open throttle for too long, all can cause some type of melt down, seizure or broken piston skirts
over jetting is not a "cure all" for proper maintenence
and even at rich main jetting, a worn cylinder, developing an airleak, or holding wide open throttle for too long, all can cause some type of melt down, seizure or broken piston skirts
over jetting is not a "cure all" for proper maintenence
Blaner
Your Friendly South African Ambassador
in a 'control case study' assuming the motor is in perfect condition with no airleaks and ideal compression and so on, No, a richly jetted motor will not melt pistons etc. Richer is safer than leaner.
but reality is not ideal and as Awk said, maintanence is the key. With that said, always stick on the richer side of the scale rather than jetting to avoid problems caused by lean jetting. Jetting is but one of many things that can cause engine longevity or failure.
but reality is not ideal and as Awk said, maintanence is the key. With that said, always stick on the richer side of the scale rather than jetting to avoid problems caused by lean jetting. Jetting is but one of many things that can cause engine longevity or failure.
Too rich a mixture can also have its problems, apart from some lack of power, it may cause the motor to not develop enough heat to burn off oil residue which can cause fouled plugs and carbon deposit build up in the top end and exhaust.
Okay so u cant foul plugs if your lean? And if im rich at a 55 pilot (keihin pj) i should go to the 50
Yes and no.
Blaner said it best. In a "perfect world" perfect jetting would neither foul the plugs or cause a meltdown. We don't live in a perfect world so there's no "perfect" jetting. I can tell you, at the jetting I'm at (in my signature) I've rode the dogpiss out of my blaster and I've not melted down a piston or fouled a plug. Just this past weekend out at busco I was wailing on that thing and had no trouble at all.
The trick to jetting is to pick a few non-variables and then work around the rest. The first thing you need to pick is an oil to fuel ratio (assuming you've blocked off the stock oil pump) and always mix your fuel and oil at the same ratio. Most people run 32:1 gas/oil mixture of their preferred brand oil (pick one, you can pretty much run any 2 stroke oil made for dirtbikes, weedeaters and the life).
Once you've got a fresh batch of premix, you need to do a hot and cold compression test. Top end health affects jetting a lot more than most people want to believe. Once you know your current engine condition, go to this link:
http://www.blasterforum.com/engine-...ything-you-need-know-most-useful-posts-28478/
and go to the one by blasterfreek "great carb tuning guide". Read the entire page in the link he provided and then go read it again. Then get up go outside and pull your carb back apart and look at it and write down the current jetting numbers and then come back inside and re-read the entire page AGAIN so it'll sink in. Then go play with your jetting! I recommend tuning backwards than "yellow dog racing" however. He says to start with the main because it's easiest but I disagree slightly. I think the pilot is the easiest to start with. Either way will work but I think it's easier to go at it "bottom up".
here is all the info and answers to your questions all bundled into one.........
read, re-read, re-read again till you understand, every 2 stroke owner should know this stuff
not tryin to be harsh, but all the answers are right here, no waiting for responses, and you can print it out and take it to the garage with you as you are jetting your bike .......................
http://www.blasterforum.com/do-yourself-20/jetting-101-everything-explained-1625/
and i stronlgy agree with civic, start at the bottom and work up
read, re-read, re-read again till you understand, every 2 stroke owner should know this stuff
not tryin to be harsh, but all the answers are right here, no waiting for responses, and you can print it out and take it to the garage with you as you are jetting your bike .......................
http://www.blasterforum.com/do-yourself-20/jetting-101-everything-explained-1625/
and i stronlgy agree with civic, start at the bottom and work up
Doesn't matter if you are RICH or POOR! Your motor can always fail! The only thing were rich or poor makes a differnce is how quick it will be fixed!
LOL!!!! I just had to do it!
LOL!!!! I just had to do it!
