Need Blaster Help (falling flat on top end)

[KFx400jim]

OK, I bought a blaster for my wife. It's in great shape but it falls flat early on top end. It seems the worst in 1st and 2nd gear. As you get up through the gears it seems to be a bit better. I have pulled the carb and cleaned it. It didn't help at all.

Can anyone tell me what the stock jet sizes are? Also, what should the mixture settings be for a bone stock Blaster? I am at 5000 feet in New Mexico

If anyone knows another reason, please speak up.

[SunLrider]

the stock jetting on a 94 blaster (what I have) is a 230 main jet and a 32.5 pilot jet. mixture as in oil to gas? if so a 32:1 is great

[KFx400jim]

Sorry I wasn't clear. I was talking about the mixture screw. I was wondering what teh factory setting is

[SunLrider]

ohhh. when i got the manual it said turn it in until its snug then 1 1/2 turns out. you may want to turn out maybe 2 or 2 1/4 because of your elevation

[KFx400jim]

Thanks for the help. I'll take the carb off and check the jet sizes. It seems to be leaning out and falling flat on the top end.

What part of Mass are you from? I grew up in Haverhill

Edited November 17, 2008 by KFx400jim

[Wildcard]

also do a compression test, what year is it?

[Raptor8]

take the airbox lid off and leave it off. we have the same problem here [elevation]. you need to get more air thru there, and this is what Yam and Toomey recommend.

[KFx400jim]

It's a 2001. What should the compression read? I have a tester just not a damn manual ! Anyone know where there is one online?

Thanks for the info on the airbox lid. This thing is in great shape. It just annoys the crap out of me that I can't get it in tune

My KFX seems to do fine at this altitude, just minor tweeking

[Wildcard]

Sorry got to thinking about it, its most likly not compression, do a plug chop to see if you are running rich or lean, also what is your needle set on?

Edited November 17, 2008 by Wildcard

[KFx400jim]

I need to check the needle setting. I just pulled the carb apart and cleaned everything. Like a dumb as*, I didn't write any of the settings or jet sizes down before I reassembled it. I'll check the plug again too. I just went and replaced it when I bought the quad

Just out of curiosity, what should the compression read? I just want to check it.

[Wildcard]

so the compression should be around 115 to 120 give er take a few lbs for use on the engine.

[SunLrider]

i googled it and it said 6:6:1 but im not sure

[KFx400jim]

I'll check that out when I get home. I may also pull the airbox lid and see if that helps

[Raptor8]

I had trouble with mine until I bought a unifilter air filter and left the airbox lid off. This is what Stuart Toomey told me to do...he was right.

[mywifeknowseverythin]

This is what Stuart Toomey told me to do...he was right.

The KING of Name Drops!!!!!

[Stoopidbot1]

When you have been around as long as this guy, you have plenty of names to drop!

[mywifeknowseverythin]

I guess when youve seen the Fall of the Rise and Fall of the Roman Empire your bound to know a Few names....

[Stoopidbot1]

I think he was Cesar's mechanic!

J/K we love you Mr.8

[mywifeknowseverythin]

I found a Couple of Inventions he made as Wee Lad......

This one is actually Dated.....For you Youngins like us out there.....10 Yrs before Man landed on the moon....!!!!

[Raptor8]

my DAD is famous for the barrel chariot....

is this pick on r8 day?

by the way, it's off topic, so let's put it back on topic.

I've known Stuart since I lived in california, shortly after the dinosaurs died off. When the volcanoes cooled I moved to Oregon. I was having the exact same problem so I called him for advice. Here I am just passing on what he said. I have a lot more friends too.

For awhile there Toomey was talking about moving up here to be nearby Rob Muzzy as well as Powroll Ind. But I guess he changed his mind.

Edited November 19, 2008 by Raptor8

[anubis]

You could also think about regearing it. This will make it wind out more before shifting, especially in first and second gear. I have the same issue with my race blaster engine

[Raptor8]

the TOOMEY B1 kit not only is the pipe, but jets, airfilter, instructions, lots more stuff. on mine we changed the main jet from 230 to 320 and lifted the needle one step. Also used the unifilter in the kit and left the airbox lid off. IT WORKED GREAT!

If you cant fidure it out, we can call Toomey industries and ask them- they are very nice about helping people and they have a pretty cool website too.

anubis mentioned tires and that's a good point: the stockers SAY 20 but they are so balloonish they are actually 22 inch. I used ITP 20" XCR on the back and they are noticeably shorter- that solved my gearing problem.

let us know how it goes.

Edited November 19, 2008 by Raptor8

[KFx400jim]

I have a set of 20" Innova's ready to throw on it already. I was really surprised how well they worked and held up on my KFX so I bought a set for the Blaster. I have been working 12 hour shifts and get home when it's dark so, I haven't had a chance to pull the airbox lid just yet. I'm going to do it this weekend and see how it goes

[Raptor8]

stay in touch- happy to help! "older than dirt"

[KFx400jim]

Well, pulling the lid worked like a champ for about 4 hours lol. We got a cold snap in the afternoon and it needed to run a richer mixture so, it went back on and runs like a champ again. I'll just have to pull it back off when the temp comes up. Thanks for the help