hi i bought my first blaster the other day and was wondering if i should rejet and which size. theres a full fmf exhaust and a k&n filter and i live at 3300 feet elevation in northern az.
Do i need to rejet?
- Thread starter blasteraz
- Start date
im not sure im guessing its stock jet size. is a 98 the guy i bought it from said all he changed was pipes and filter. it seems like it makes good power on top but isnt as smooth doen low on rpm range. i asked a local shop and they said dont jet it but i want to start making a lil more power with it and i dont know how the shops around here are with upgrading quads.
Check the jet size also as stated above do a plug chop to determain if you are rich or lean.rich is better then Lean. You can also take off the air box lids and gain alittle power but you also have to rejet for that.
ok i will try to check the size on my next day off. what size should it be and if i take off airbox what size should i go to. any recomendations on brand of jets. im going to check the plug as well since the filter was pretty dirty the plug might not be the best as well.
If that carb doesn't have at least a 270 main. IT's super lean and could seize up!
If a shop said dont change jetting then you need to find a new shop. Do not run it until you have a 270-300 main jet in there. You will be posting on this forum that you need to rebuild
Defitnatly change your shop, anyone who tells you not to jet when you change the breathing of a 2 stroke, talks without experience and should be avoided at all cost.
I would be putting in a #280 main and then do the following.
Plug chop.
Warm up motor to operating temp.
Fit new B8ES plug, ride through the gears and hold WOT in 5th or 6th gear for 10 seconds, or as long as you can safely.
Switch off the motor and pull in the clutch, roll to a stop.
Take the plug out and replace the old one for the ride home.
Carefully cut the threaded end off the plug to expose the insulator.
There should be a smoke ring of a cardboard or biscuit colour around the insulator.
If it is non existant or a very light colour, you are lean and require a larger main jet.
If it is a lot darker you are rich and may go down a size in main.
I prefer to run a little on the darker side, I may loose a little power but it is worth it for the peace of mind that I won't need a rebuild so soon.
http://www.blasterforum.com/do-yourself-20/how-plug-chop-38674/
http://www.blasterforum.com/engine-13/plug-chop-how-vid-48226/
This is a good to go plug.
This one is a little rich, but I would run it, I like to be on the safe side.
I would be putting in a #280 main and then do the following.
Plug chop.
Warm up motor to operating temp.
Fit new B8ES plug, ride through the gears and hold WOT in 5th or 6th gear for 10 seconds, or as long as you can safely.
Switch off the motor and pull in the clutch, roll to a stop.
Take the plug out and replace the old one for the ride home.
Carefully cut the threaded end off the plug to expose the insulator.
There should be a smoke ring of a cardboard or biscuit colour around the insulator.
If it is non existant or a very light colour, you are lean and require a larger main jet.
If it is a lot darker you are rich and may go down a size in main.
I prefer to run a little on the darker side, I may loose a little power but it is worth it for the peace of mind that I won't need a rebuild so soon.
http://www.blasterforum.com/do-yourself-20/how-plug-chop-38674/
http://www.blasterforum.com/engine-13/plug-chop-how-vid-48226/
This is a good to go plug.
This one is a little rich, but I would run it, I like to be on the safe side.
ok so at least a 270 jet for a open air box or just pipes and filter. thank you for the reponses. this is the first 2 stroke ive had in a long timeso i will try to get all the info and let you guys know. does anyone know a good shop in northern az by laughlin NV or anyone else that lives around here that knows these blasters.
IF no lid I'd start at 290! There is a couple members in NV- carson city I believe. Can't remember their screen name off hand!
Jets are $2.99 each. You can run stock exhaust, stock filter, air box lid on, and your oil injector and run stock jet. Im in tucson if you wanna come to me.
As said above, stock everything you can use stock jetting.
Change anything which interferes with the breathing or air fuel ratio and you have to rejet and confirm with a plug chop, otherwise BOOM.
im also new too 2 strokes and all im pulling the carb apart and doing a rebuild on it tonight was thinking while i got it apart jetting for open air box my blaster is bored .30 over and it has stock everything else for now in process of getting exhaust my question is could i put like a 290 jet in there now since its apart and run a 290 jet if i have just the air box off or will it be too rich
Too rich IMO! I'd go with 240-250 all stock lid removed. But a plug chop will tell you for sure.
Just posted this for another here is a DIY on correct way to clean a carb with pics!
http://www.blasterforum.com/do-yourself-20/how-clean-carb-36600/
if i go with a 300 main and the stock 32.5 piolt do i need to adjust the needle position. stock is 2nd position correct?would i need to move it up 1 to the 3rd?
300 main is way rich for your mods. Its better to be rich than lean though. With your mods, i would run like a 260 main
