blaster question
- Thread starter qaudracer711
- Start date
if it was me id start with a 250 its got to be close if not right on but this is me you have to do what you think is right
You will run faster if you tune your quad right. Adjusting the mixture screw is a piece of cake. I do mine with a little screwdriver WHILE I'm riding it.....it's that easy.
Just go to your local stealership or Rocky Mountain ATV and purchase OEM Mikuni 26mm hex main jets for your blaster. Get a 260 and 250. I doubt you need more than that. Start with a 260 main and play with the mixture screw....turn it in a half turn. To get to the main jet, pop the carb off, take the 4 screws out of the bottom float bowl and you will see a plastic cap laying around a gold colored center jet right in the middle. The stock main jet is a 230. You have more airflow, so you need more fuel to match that. Unscrew the jet out of the slot(watch the washer with it....you keep that), put in a 260 main.
Now go to your local part's store or even Auto Zone has them and get 2-BR8ES plugs. Take your quad out(with screw turned 1/2 turn in and the 260 main in). Let it warm out and get it to operating temperature.....warm up....ride around for 5 or so minutes. Take the spark plug out, put in a new plug. Now since your quad is warmed up, take off IMMEDIATELY. Don't put around. Act as if you are drag racing on a long straight. Go through all the gears hard and wide open and keep it pinned in 6th gear for a 1/4 mile or so. QUICKLY turn around and do the same thing back where you took off from going wide open. When you get back there, don't slow down and shut it off. Instead, hit your kill switch at full speed, then pull your clutch in and roll there. Now take the new spark plug you just put in for that run and take it out. Take something that cuts the threads off the plug.....a good pipe cutter works good. Before cutting you will see a the white portion in the center of the plug. You want to look for the "fuel ring" around the bottom......the only way you can see this really well is if you cut the threads off. The fuel ring is excess deposits of uncombusted fuel building up on the spark plug. If you are running too lean, you won't see any deposits and the white insulator may even be melting some. If it is too rich, you will see a dark brown ring at the bottom. What you are aiming for is just a LITTLE bit of a tan ring on the bottom....almost hazy or smokey. This tells you that you are very close to running the much sought after "perfect" air/fuel ratio and you aren't wasting uncombusted fuel other than a TINY little bit that you see on the plug. Some people run slightly richer just to keep engine temps down at the sacrifice of some power.....that comes down to personal preference. Try doing the plug chop with the 260 main first and look at it. If it is rich, then try the 250 and cut that new plug and look at it. If it is lean with the 260, you will need to try a 270.
Here are a few I did....all are rich, although some people like to run this rich....it's way too rich for my tastes.
The one of the right is too rich(darker in color). The one in the middle is 1 size smaller main jet. Some people like their plugs like that(it's a little darker than the photo shows), but I prefer a more "smokey" lighter color that's more tan than brown. The one on the left is completely different. It's a 1/2 throttle plug chop to check the needle. You shouldn't have to worry about your needle....that should be fine with just an air filter.
X( Next time please only start ONE thread for the same problem. Better use of the English language will make it easier for us old farts with knowledge and experience to understand what you are saying. I:I
Been messing with two strokes before they had reed valvesI:I
Been messing with two strokes before they had reed valvesI:I
sorry bout posting the second thread im newbie to site and can i do the plug chop without turning the air mixture screw or i need to turn it? and i just ordered the 250 and 260
The mixture screw won't matter for the plug chop. The wide open throttle plug chop only determines what jet you will use for your main jet.
The pilot jet/mixture screw is a little easier and a little tougher in some cases. That's something that is more a matter of feel. Take a small screwdriver with you. Turn the screw 1/2 turn in. See how it feels as a starting point. From there try going 1/4 turns in(richer) and out(leaner) and see how it runs off the line and through the bottom end power. This will control fuel delivery up to 1/4 throttle. Unfortunately, a plug chop can't be done with the mixture screw. Just do it by feel. Where it feels the fastest is where you want it. If you want, you can maybe turn it a 1/4 turn richer than that just to keep it cooler while idling.
thanks guys i ordered the 250 and 260 last night ill let u guys no how it works when they get here
