more hp

[JareeB]

i have a 98 blaster, i raced it last weekend on a less than 1000ft track and ran 47.9mph, the mods i have are:
fmf gold series pipe with what i think is the first powercore by fmf? pic of it
and then the jetting for that pipe
i dont have them tires in the pictures anymore. they are now smaller rawr 18" maybe
thats all that i know of.
i believe it has stock gearing.

i want to get more hp out of it and still have a good trail bike.
thinking of boring .040 over with a milled head, i need to keep this on pump gas!!
my dad has a banshee he ran 78mph with fmf powercore 2 and 1.5" studes B)
i would like to run with him better, and kick the 4 strokes ass at the track!

 

[acezeesawtooth]

you will need a port job. boring it that much wont give you any power. get it ported and the head milled and you will do much much better

 

[motoman9911]

Boring it will do nothing, unless it is needed. Get a port job. That will help quite a bit.

 

[JareeB]

oh i thought it would reading that other post about milling some guy saying he is going 75mph with 14/40 gearing and .040 over and .020 milled plus port and a dg pipe

 

[acezeesawtooth]

the port and milling are where the power comes from. the bored .040 is negligible

 

[JareeB]

the port and milling are where the power comes from. the bored .040 is negligible

alright thanks, you think it a shop can do car head shave (4g63T engine) they can do a head for blaster? also how much would a port job cost?

 

[99LRDblaster]

i have a 98 blaster, i raced it last weekend on a less than 1000ft track and ran 47.9mph, the mods i have are:
fmf gold series pipe with what i think is the first powercore by fmf? pic of it
and then the jetting for that pipe
i dont have them tires in the pictures anymore. they are now smaller rawr 18" maybe
thats all that i know of.
i believe it has stock gearing.

i want to get more hp out of it and still have a good trail bike.
thinking of boring .040 over with a milled head, i need to keep this on pump gas!!
my dad has a banshee he ran 78mph with fmf powercore 2 and 1.5" studes B)
i would like to run with him better, and kick the 4 strokes ass at the track!

I'd put on larger than 18" tires if you are running trails....at least 20". Boring .040 over is a rebuild size........not 40cc. Cheap easy mods are milling the head .030 down at a local machine shop an running pump gas, then sending your cylinder(and head to get milled/rechambered if you want) out to get ported. Then running a Uni filter with the lid off. That can all be had for $300ish but can range from $225-$500. You will probably need a new carb too. I suggest a Keihin 33 PWK, but they are tough to come by used and cost an arm and a leg new. A 30mm would work alright, but probably not optimal. As a side note, put some carbon fiber replacement reeds on the stock reed cage as a cheap replacement.

 

[99LRDblaster]

oh i thought it would reading that other post about milling some guy saying he is going 75mph with 14/40 gearing and .040 over and .020 milled plus port and a dg pipe

It won't do 75, but it will be faster. DG pipes suck ass. One of the magazines did a dyno of Blaster pipes a long while back and the DG pipe pulled less power and had a worse powerband than the stock Yamaha pipe.

 

[JareeB]

I'd put on larger than 18" tires if you are running trails....at least 20". Boring .040 over is a rebuild size........not 40cc. Cheap easy mods are milling the head .030 down at a local machine shop an running pump gas, then sending your cylinder(and head to get milled/rechambered if you want) out to get ported. Then running a Uni filter with the lid off. That can all be had for $300ish but can range from $225-$500. You will probably need a new carb too. I suggest a Keihin 33 PWK, but they are tough to come by used and cost an arm and a leg new. A 30mm would work alright, but probably not optimal. As a side note, put some carbon fiber replacement reeds on the stock reed cage as a cheap replacement.

carbon fiber reed break? ik my local machine shop does the 4g63t head for 50 bucks, ill have to talk to my dad about porting, his raced for a guy that holds a record fastest open mod sled in WI

 

[JareeB]

It won't do 75, but it will be faster. DG pipes suck ass. One of the magazines did a dyno of Blaster pipes a long while back and the DG pipe pulled less power and had a worse powerband than the stock Yamaha pipe.

i dont have dg pipe
http://i254.photobucket.com/albums/hh87/XxJareeBxX/020400_184303.jpg

 

[acezeesawtooth]

^^^^ he was talking about the banshee pipe. anyways that fmf is holding you back for drag racing. they are great mx and trail pipes cause they have alot of down low punch but and f7 or lrd will open that up down the drag strip

 

[JareeB]

^^^^ he was talking about the banshee pipe. anyways that fmf is holding you back for drag racing. they are great mx and trail pipes cause they have alot of down low punch but and f7 or lrd will open that up down the drag strip

yeah she does wheelie in third gear lol. is the stock pipe better for drag?

 

[acezeesawtooth]

no anything other than dg is better than stock pipe for the blaster

 

[sheeblast]

if you want to be faster get the following stuff down to your blaster
mx port
the head cut
better exhaust
bigger carb
maybe a stroker crank (if you do this, get this first then have your jug ported to match and your head cut to match the extra stroke)
also get some better suspension.

a question, a 1000ft drag race is long, very long. most are 300ft, some are 500ft.

 

[JareeB]

no anything other than dg is better than stock pipe for the blaster

okay, so now lets say i have my jug ported, head milled .030, 92 octane, same pipe and silencer, bigger tires lets 22", the right jetting, and uni air filter, what gearing would i run? and how fast would you think it would go, i weight like 120, and should i put snowmoblie studs in like my father?

 

[JareeB]

if you want to be faster get the following stuff down to your blaster
mx port
the head cut
better exhaust
bigger carb
maybe a stroker crank (if you do this, get this first then have your jug ported to match and your head cut to match the extra stroke)
also get some better suspension.

a question, a 1000ft drag race is long, very long. most are 300ft, some are 500ft.

1000ft is what we run i guess im talking about radar runs on ice

 

[99LRDblaster]

okay, so now lets say i have my jug ported, head milled .030, 92 octane, same pipe and silencer, bigger tires lets 22", the right jetting, and uni air filter, what gearing would i run? and how fast would you think it would go, i weight like 120, and should i put snowmoblie studs in like my father?

If you shave the fenders for drag and throw on a 14 tooth front sprocket, you might hit upper 60s.....maybe like 68ish or a few mph faster on top end than a stock 400ex.

 

[JareeB]

If you shave the fenders for drag and throw on a 14 tooth front sprocket, you might hit upper 60s.

well ik my speed wasnt right because i spun. the fastest 4 storke there ran 68mph and he came in second so if i get like 70 or so but still upper 60s sounds funI:I

edit: by the way i will be lowering my blaster when i go racing

 

[99LRDblaster]

well ik my speed wasnt right because i spun. the fastest 4 storke there ran 68mph and he came in second so if i get like 70 or so but still upper 60s sounds funI:I

edit: by the way i will be lowering my blaster when i go racing

What kind of racing are you doing? If you are looking for top speed, then just get a 14 tooth front and put a different rear sprocket on and you can hit 70+ but your acceleration will be mediocre.

 

[acezeesawtooth]

sounds like 1000ft ice drags. so insane pull off the line wont help much. so yeah run 14/40 or 14/38 gearing and hit low 70's by the end of the run